eac4c984df
This commit adds a new rendering backend, GLES2, and adds a project setting to enable it. Currently this backend can only be used on the X11 platform, but integrating into other platforms is planned.
2114 lines
56 KiB
GLSL
2114 lines
56 KiB
GLSL
[vertex]
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#define M_PI 3.14159265359
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/*
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from VisualServer:
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ARRAY_VERTEX=0,
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ARRAY_NORMAL=1,
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ARRAY_TANGENT=2,
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ARRAY_COLOR=3,
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ARRAY_TEX_UV=4,
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ARRAY_TEX_UV2=5,
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ARRAY_BONES=6,
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ARRAY_WEIGHTS=7,
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ARRAY_INDEX=8,
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*/
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//hack to use uv if no uv present so it works with lightmap
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/* INPUT ATTRIBS */
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layout(location=0) in highp vec4 vertex_attrib;
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layout(location=1) in vec3 normal_attrib;
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
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layout(location=2) in vec4 tangent_attrib;
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#endif
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#if defined(ENABLE_COLOR_INTERP)
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layout(location=3) in vec4 color_attrib;
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#endif
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#if defined(ENABLE_UV_INTERP)
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layout(location=4) in vec2 uv_attrib;
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#endif
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#if defined(ENABLE_UV2_INTERP)
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layout(location=5) in vec2 uv2_attrib;
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#endif
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uniform float normal_mult;
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#ifdef USE_SKELETON
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layout(location=6) in ivec4 bone_indices; // attrib:6
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layout(location=7) in vec4 bone_weights; // attrib:7
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#endif
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#ifdef USE_INSTANCING
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layout(location=8) in highp vec4 instance_xform0;
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layout(location=9) in highp vec4 instance_xform1;
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layout(location=10) in highp vec4 instance_xform2;
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layout(location=11) in lowp vec4 instance_color;
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#if defined(ENABLE_INSTANCE_CUSTOM)
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layout(location=12) in highp vec4 instance_custom_data;
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#endif
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#endif
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layout(std140) uniform SceneData { //ubo:0
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highp mat4 projection_matrix;
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highp mat4 inv_projection_matrix;
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highp mat4 camera_inverse_matrix;
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highp mat4 camera_matrix;
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mediump vec4 ambient_light_color;
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mediump vec4 bg_color;
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mediump vec4 fog_color_enabled;
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mediump vec4 fog_sun_color_amount;
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mediump float ambient_energy;
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mediump float bg_energy;
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mediump float z_offset;
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mediump float z_slope_scale;
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highp float shadow_dual_paraboloid_render_zfar;
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highp float shadow_dual_paraboloid_render_side;
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highp vec2 viewport_size;
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highp vec2 screen_pixel_size;
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highp vec2 shadow_atlas_pixel_size;
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highp vec2 directional_shadow_pixel_size;
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highp float time;
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highp float z_far;
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mediump float reflection_multiplier;
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mediump float subsurface_scatter_width;
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mediump float ambient_occlusion_affect_light;
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bool fog_depth_enabled;
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highp float fog_depth_begin;
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highp float fog_depth_curve;
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bool fog_transmit_enabled;
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highp float fog_transmit_curve;
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bool fog_height_enabled;
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highp float fog_height_min;
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highp float fog_height_max;
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highp float fog_height_curve;
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};
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uniform highp mat4 world_transform;
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#ifdef USE_LIGHT_DIRECTIONAL
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layout(std140) uniform DirectionalLightData { //ubo:3
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highp vec4 light_pos_inv_radius;
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mediump vec4 light_direction_attenuation;
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mediump vec4 light_color_energy;
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mediump vec4 light_params; //cone attenuation, angle, specular, shadow enabled,
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mediump vec4 light_clamp;
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mediump vec4 shadow_color_contact;
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highp mat4 shadow_matrix1;
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highp mat4 shadow_matrix2;
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highp mat4 shadow_matrix3;
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highp mat4 shadow_matrix4;
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mediump vec4 shadow_split_offsets;
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};
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#endif
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#ifdef USE_VERTEX_LIGHTING
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//omni and spot
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struct LightData {
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highp vec4 light_pos_inv_radius;
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mediump vec4 light_direction_attenuation;
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mediump vec4 light_color_energy;
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mediump vec4 light_params; //cone attenuation, angle, specular, shadow enabled,
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mediump vec4 light_clamp;
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mediump vec4 shadow_color_contact;
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highp mat4 shadow_matrix;
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};
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layout(std140) uniform OmniLightData { //ubo:4
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LightData omni_lights[MAX_LIGHT_DATA_STRUCTS];
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};
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layout(std140) uniform SpotLightData { //ubo:5
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LightData spot_lights[MAX_LIGHT_DATA_STRUCTS];
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};
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#ifdef USE_FORWARD_LIGHTING
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uniform int omni_light_indices[MAX_FORWARD_LIGHTS];
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uniform int omni_light_count;
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uniform int spot_light_indices[MAX_FORWARD_LIGHTS];
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uniform int spot_light_count;
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#endif
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out vec4 diffuse_light_interp;
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out vec4 specular_light_interp;
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void light_compute(vec3 N, vec3 L,vec3 V, vec3 light_color, float roughness, inout vec3 diffuse, inout vec3 specular) {
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float dotNL = max(dot(N,L), 0.0 );
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diffuse += dotNL * light_color / M_PI;
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if (roughness > 0.0) {
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vec3 H = normalize(V + L);
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float dotNH = max(dot(N,H), 0.0 );
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float intensity = pow( dotNH, (1.0-roughness) * 256.0);
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specular += light_color * intensity;
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}
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}
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void light_process_omni(int idx, vec3 vertex, vec3 eye_vec,vec3 normal, float roughness,inout vec3 diffuse, inout vec3 specular) {
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vec3 light_rel_vec = omni_lights[idx].light_pos_inv_radius.xyz-vertex;
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float light_length = length( light_rel_vec );
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float normalized_distance = light_length*omni_lights[idx].light_pos_inv_radius.w;
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vec3 light_attenuation = vec3(pow( max(1.0 - normalized_distance, 0.0), omni_lights[idx].light_direction_attenuation.w ));
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light_compute(normal,normalize(light_rel_vec),eye_vec,omni_lights[idx].light_color_energy.rgb * light_attenuation,roughness,diffuse,specular);
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}
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void light_process_spot(int idx, vec3 vertex, vec3 eye_vec, vec3 normal, float roughness, inout vec3 diffuse, inout vec3 specular) {
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vec3 light_rel_vec = spot_lights[idx].light_pos_inv_radius.xyz-vertex;
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float light_length = length( light_rel_vec );
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float normalized_distance = light_length*spot_lights[idx].light_pos_inv_radius.w;
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vec3 light_attenuation = vec3(pow( max(1.0 - normalized_distance, 0.001), spot_lights[idx].light_direction_attenuation.w ));
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vec3 spot_dir = spot_lights[idx].light_direction_attenuation.xyz;
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float spot_cutoff=spot_lights[idx].light_params.y;
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float scos = max(dot(-normalize(light_rel_vec), spot_dir),spot_cutoff);
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float spot_rim = (1.0 - scos) / (1.0 - spot_cutoff);
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light_attenuation *= 1.0 - pow( max(spot_rim,0.001), spot_lights[idx].light_params.x);
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light_compute(normal,normalize(light_rel_vec),eye_vec,spot_lights[idx].light_color_energy.rgb*light_attenuation,roughness,diffuse,specular);
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}
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#endif
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/* Varyings */
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out highp vec3 vertex_interp;
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out vec3 normal_interp;
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#if defined(ENABLE_COLOR_INTERP)
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out vec4 color_interp;
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#endif
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#if defined(ENABLE_UV_INTERP)
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out vec2 uv_interp;
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#endif
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#if defined(ENABLE_UV2_INTERP)
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out vec2 uv2_interp;
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#endif
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
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out vec3 tangent_interp;
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out vec3 binormal_interp;
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#endif
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#if defined(USE_MATERIAL)
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layout(std140) uniform UniformData { //ubo:1
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MATERIAL_UNIFORMS
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};
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#endif
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VERTEX_SHADER_GLOBALS
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#ifdef RENDER_DEPTH_DUAL_PARABOLOID
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out highp float dp_clip;
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#endif
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#define SKELETON_TEXTURE_WIDTH 256
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#ifdef USE_SKELETON
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uniform highp sampler2D skeleton_texture; //texunit:-1
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#endif
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out highp vec4 position_interp;
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// FIXME: This triggers a Mesa bug that breaks rendering, so disabled for now.
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// See GH-13450 and https://bugs.freedesktop.org/show_bug.cgi?id=100316
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//invariant gl_Position;
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void main() {
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highp vec4 vertex = vertex_attrib; // vec4(vertex_attrib.xyz * data_attrib.x,1.0);
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mat4 world_matrix = world_transform;
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#ifdef USE_INSTANCING
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{
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highp mat4 m=mat4(instance_xform0,instance_xform1,instance_xform2,vec4(0.0,0.0,0.0,1.0));
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world_matrix = world_matrix * transpose(m);
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}
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#endif
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vec3 normal = normal_attrib * normal_mult;
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
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vec3 tangent = tangent_attrib.xyz;
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tangent*=normal_mult;
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float binormalf = tangent_attrib.a;
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#endif
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#if defined(ENABLE_COLOR_INTERP)
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color_interp = color_attrib;
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#if defined(USE_INSTANCING)
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color_interp *= instance_color;
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#endif
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#endif
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#ifdef USE_SKELETON
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{
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//skeleton transform
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ivec2 tex_ofs = ivec2( bone_indices.x%256, (bone_indices.x/256)*3 );
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highp mat3x4 m = mat3x4(
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texelFetch(skeleton_texture,tex_ofs,0),
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texelFetch(skeleton_texture,tex_ofs+ivec2(0,1),0),
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texelFetch(skeleton_texture,tex_ofs+ivec2(0,2),0)
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) * bone_weights.x;
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tex_ofs = ivec2( bone_indices.y%256, (bone_indices.y/256)*3 );
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m+= mat3x4(
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texelFetch(skeleton_texture,tex_ofs,0),
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texelFetch(skeleton_texture,tex_ofs+ivec2(0,1),0),
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texelFetch(skeleton_texture,tex_ofs+ivec2(0,2),0)
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) * bone_weights.y;
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tex_ofs = ivec2( bone_indices.z%256, (bone_indices.z/256)*3 );
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m+= mat3x4(
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texelFetch(skeleton_texture,tex_ofs,0),
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texelFetch(skeleton_texture,tex_ofs+ivec2(0,1),0),
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texelFetch(skeleton_texture,tex_ofs+ivec2(0,2),0)
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) * bone_weights.z;
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tex_ofs = ivec2( bone_indices.w%256, (bone_indices.w/256)*3 );
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m+= mat3x4(
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texelFetch(skeleton_texture,tex_ofs,0),
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texelFetch(skeleton_texture,tex_ofs+ivec2(0,1),0),
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texelFetch(skeleton_texture,tex_ofs+ivec2(0,2),0)
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) * bone_weights.w;
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vertex.xyz = vertex * m;
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normal = vec4(normal,0.0) * m;
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
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tangent.xyz = vec4(tangent.xyz,0.0) * m;
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#endif
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}
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#endif
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
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vec3 binormal = normalize( cross(normal,tangent) * binormalf );
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#endif
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#if defined(ENABLE_UV_INTERP)
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uv_interp = uv_attrib;
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#endif
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#if defined(ENABLE_UV2_INTERP)
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uv2_interp = uv2_attrib;
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#endif
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#if defined(USE_INSTANCING) && defined(ENABLE_INSTANCE_CUSTOM)
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vec4 instance_custom = instance_custom_data;
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#else
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vec4 instance_custom = vec4(0.0);
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#endif
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highp mat4 modelview = camera_inverse_matrix * world_matrix;
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highp mat4 local_projection = projection_matrix;
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//using world coordinates
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#if !defined(SKIP_TRANSFORM_USED) && defined(VERTEX_WORLD_COORDS_USED)
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vertex = world_matrix * vertex;
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normal = normalize((world_matrix * vec4(normal,0.0)).xyz);
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
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tangent = normalize((world_matrix * vec4(tangent,0.0)).xyz);
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binormal = normalize((world_matrix * vec4(binormal,0.0)).xyz);
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#endif
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#endif
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float roughness=0.0;
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//defines that make writing custom shaders easier
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#define projection_matrix local_projection
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#define world_transform world_matrix
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{
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VERTEX_SHADER_CODE
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}
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//using local coordinates (default)
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#if !defined(SKIP_TRANSFORM_USED) && !defined(VERTEX_WORLD_COORDS_USED)
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vertex = modelview * vertex;
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normal = normalize((modelview * vec4(normal,0.0)).xyz);
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
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tangent = normalize((modelview * vec4(tangent,0.0)).xyz);
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binormal = normalize((modelview * vec4(binormal,0.0)).xyz);
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#endif
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#endif
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//using world coordinates
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#if !defined(SKIP_TRANSFORM_USED) && defined(VERTEX_WORLD_COORDS_USED)
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vertex = camera_inverse_matrix * vertex;
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normal = normalize((camera_inverse_matrix * vec4(normal,0.0)).xyz);
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
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tangent = normalize((camera_inverse_matrix * vec4(tangent,0.0)).xyz);
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binormal = normalize((camera_inverse_matrix * vec4(binormal,0.0)).xyz);
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#endif
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#endif
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vertex_interp = vertex.xyz;
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normal_interp = normal;
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
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tangent_interp = tangent;
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binormal_interp = binormal;
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#endif
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#ifdef RENDER_DEPTH
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#ifdef RENDER_DEPTH_DUAL_PARABOLOID
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vertex_interp.z*= shadow_dual_paraboloid_render_side;
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normal_interp.z*= shadow_dual_paraboloid_render_side;
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dp_clip=vertex_interp.z; //this attempts to avoid noise caused by objects sent to the other parabolloid side due to bias
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//for dual paraboloid shadow mapping, this is the fastest but least correct way, as it curves straight edges
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highp vec3 vtx = vertex_interp+normalize(vertex_interp)*z_offset;
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highp float distance = length(vtx);
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vtx = normalize(vtx);
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vtx.xy/=1.0-vtx.z;
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vtx.z=(distance/shadow_dual_paraboloid_render_zfar);
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vtx.z=vtx.z * 2.0 - 1.0;
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vertex.xyz=vtx;
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vertex.w=1.0;
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#else
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float z_ofs = z_offset;
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z_ofs += (1.0-abs(normal_interp.z))*z_slope_scale;
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vertex_interp.z-=z_ofs;
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#endif //RENDER_DEPTH_DUAL_PARABOLOID
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#endif //RENDER_DEPTH
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gl_Position = projection_matrix * vec4(vertex_interp,1.0);
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position_interp=gl_Position;
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#ifdef USE_VERTEX_LIGHTING
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diffuse_light_interp=vec4(0.0);
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specular_light_interp=vec4(0.0);
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#ifdef USE_FORWARD_LIGHTING
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for(int i=0;i<omni_light_count;i++) {
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light_process_omni(omni_light_indices[i],vertex_interp,-normalize( vertex_interp ),normal_interp,roughness,diffuse_light_interp.rgb,specular_light_interp.rgb);
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}
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for(int i=0;i<spot_light_count;i++) {
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light_process_spot(spot_light_indices[i],vertex_interp,-normalize( vertex_interp ),normal_interp,roughness,diffuse_light_interp.rgb,specular_light_interp.rgb);
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}
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#endif
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#ifdef USE_LIGHT_DIRECTIONAL
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vec3 directional_diffuse = vec3(0.0);
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vec3 directional_specular = vec3(0.0);
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light_compute(normal_interp,-light_direction_attenuation.xyz,-normalize( vertex_interp ),light_color_energy.rgb,roughness,directional_diffuse,directional_specular);
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float diff_avg = dot(diffuse_light_interp.rgb,vec3(0.33333));
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float diff_dir_avg = dot(directional_diffuse,vec3(0.33333));
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if (diff_avg>0.0) {
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diffuse_light_interp.a=diff_dir_avg/(diff_avg+diff_dir_avg);
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} else {
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diffuse_light_interp.a=1.0;
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}
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diffuse_light_interp.rgb+=directional_diffuse;
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float spec_avg = dot(specular_light_interp.rgb,vec3(0.33333));
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float spec_dir_avg = dot(directional_specular,vec3(0.33333));
|
|
if (spec_avg>0.0) {
|
|
specular_light_interp.a=spec_dir_avg/(spec_avg+spec_dir_avg);
|
|
} else {
|
|
specular_light_interp.a=1.0;
|
|
}
|
|
|
|
specular_light_interp.rgb+=directional_specular;
|
|
|
|
#endif //USE_LIGHT_DIRECTIONAL
|
|
|
|
|
|
#endif // USE_VERTEX_LIGHTING
|
|
|
|
}
|
|
|
|
|
|
[fragment]
|
|
|
|
/* texture unit usage, N is max_texture_unity-N
|
|
|
|
1-skeleton
|
|
2-radiance
|
|
3-reflection_atlas
|
|
4-directional_shadow
|
|
5-shadow_atlas
|
|
6-decal_atlas
|
|
7-screen
|
|
8-depth
|
|
9-probe1
|
|
10-probe2
|
|
|
|
*/
|
|
|
|
uniform highp mat4 world_transform;
|
|
|
|
#define M_PI 3.14159265359
|
|
|
|
/* Varyings */
|
|
|
|
#if defined(ENABLE_COLOR_INTERP)
|
|
in vec4 color_interp;
|
|
#endif
|
|
|
|
#if defined(ENABLE_UV_INTERP)
|
|
in vec2 uv_interp;
|
|
#endif
|
|
|
|
#if defined(ENABLE_UV2_INTERP)
|
|
in vec2 uv2_interp;
|
|
#endif
|
|
|
|
#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
|
|
in vec3 tangent_interp;
|
|
in vec3 binormal_interp;
|
|
#endif
|
|
|
|
in highp vec3 vertex_interp;
|
|
in vec3 normal_interp;
|
|
|
|
|
|
/* PBR CHANNELS */
|
|
|
|
//used on forward mainly
|
|
uniform bool no_ambient_light;
|
|
|
|
|
|
|
|
#ifdef USE_RADIANCE_MAP
|
|
|
|
|
|
|
|
layout(std140) uniform Radiance { //ubo:2
|
|
|
|
mat4 radiance_inverse_xform;
|
|
float radiance_ambient_contribution;
|
|
|
|
};
|
|
|
|
#define RADIANCE_MAX_LOD 5.0
|
|
|
|
#ifdef USE_RADIANCE_MAP_ARRAY
|
|
|
|
uniform sampler2DArray radiance_map; //texunit:-2
|
|
|
|
vec3 textureDualParaboloid(sampler2DArray p_tex, vec3 p_vec,float p_roughness) {
|
|
|
|
vec3 norm = normalize(p_vec);
|
|
norm.xy/=1.0+abs(norm.z);
|
|
norm.xy=norm.xy * vec2(0.5,0.25) + vec2(0.5,0.25);
|
|
|
|
// we need to lie the derivatives (normg) and assume that DP side is always the same
|
|
// to get proper texture filtering
|
|
vec2 normg=norm.xy;
|
|
if (norm.z>0.0) {
|
|
norm.y=0.5-norm.y+0.5;
|
|
}
|
|
|
|
// thanks to OpenGL spec using floor(layer + 0.5) for texture arrays,
|
|
// it's easy to have precision errors using fract() to interpolate layers
|
|
// as such, using fixed point to ensure it works.
|
|
|
|
float index = p_roughness * RADIANCE_MAX_LOD;
|
|
int indexi = int(index * 256.0);
|
|
vec3 base = textureGrad(p_tex, vec3(norm.xy, float(indexi/256)),dFdx(normg),dFdy(normg)).xyz;
|
|
vec3 next = textureGrad(p_tex, vec3(norm.xy, float(indexi/256+1)),dFdx(normg),dFdy(normg)).xyz;
|
|
return mix(base,next,float(indexi%256)/256.0);
|
|
}
|
|
|
|
#else
|
|
|
|
uniform sampler2D radiance_map; //texunit:-2
|
|
|
|
vec3 textureDualParaboloid(sampler2D p_tex, vec3 p_vec,float p_roughness) {
|
|
|
|
vec3 norm = normalize(p_vec);
|
|
norm.xy/=1.0+abs(norm.z);
|
|
norm.xy=norm.xy * vec2(0.5,0.25) + vec2(0.5,0.25);
|
|
if (norm.z>0.0) {
|
|
norm.y=0.5-norm.y+0.5;
|
|
}
|
|
return textureLod(p_tex, norm.xy, p_roughness * RADIANCE_MAX_LOD).xyz;
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif
|
|
|
|
/* Material Uniforms */
|
|
|
|
|
|
|
|
#if defined(USE_MATERIAL)
|
|
|
|
layout(std140) uniform UniformData {
|
|
|
|
MATERIAL_UNIFORMS
|
|
|
|
};
|
|
|
|
#endif
|
|
|
|
FRAGMENT_SHADER_GLOBALS
|
|
|
|
layout(std140) uniform SceneData {
|
|
|
|
highp mat4 projection_matrix;
|
|
highp mat4 inv_projection_matrix;
|
|
highp mat4 camera_inverse_matrix;
|
|
highp mat4 camera_matrix;
|
|
|
|
mediump vec4 ambient_light_color;
|
|
mediump vec4 bg_color;
|
|
|
|
mediump vec4 fog_color_enabled;
|
|
mediump vec4 fog_sun_color_amount;
|
|
|
|
mediump float ambient_energy;
|
|
mediump float bg_energy;
|
|
|
|
mediump float z_offset;
|
|
mediump float z_slope_scale;
|
|
highp float shadow_dual_paraboloid_render_zfar;
|
|
highp float shadow_dual_paraboloid_render_side;
|
|
|
|
highp vec2 viewport_size;
|
|
highp vec2 screen_pixel_size;
|
|
highp vec2 shadow_atlas_pixel_size;
|
|
highp vec2 directional_shadow_pixel_size;
|
|
|
|
highp float time;
|
|
highp float z_far;
|
|
mediump float reflection_multiplier;
|
|
mediump float subsurface_scatter_width;
|
|
mediump float ambient_occlusion_affect_light;
|
|
|
|
bool fog_depth_enabled;
|
|
highp float fog_depth_begin;
|
|
highp float fog_depth_curve;
|
|
bool fog_transmit_enabled;
|
|
highp float fog_transmit_curve;
|
|
bool fog_height_enabled;
|
|
highp float fog_height_min;
|
|
highp float fog_height_max;
|
|
highp float fog_height_curve;
|
|
};
|
|
|
|
//directional light data
|
|
|
|
#ifdef USE_LIGHT_DIRECTIONAL
|
|
|
|
layout(std140) uniform DirectionalLightData {
|
|
|
|
highp vec4 light_pos_inv_radius;
|
|
mediump vec4 light_direction_attenuation;
|
|
mediump vec4 light_color_energy;
|
|
mediump vec4 light_params; //cone attenuation, angle, specular, shadow enabled,
|
|
mediump vec4 light_clamp;
|
|
mediump vec4 shadow_color_contact;
|
|
highp mat4 shadow_matrix1;
|
|
highp mat4 shadow_matrix2;
|
|
highp mat4 shadow_matrix3;
|
|
highp mat4 shadow_matrix4;
|
|
mediump vec4 shadow_split_offsets;
|
|
};
|
|
|
|
|
|
uniform highp sampler2DShadow directional_shadow; //texunit:-4
|
|
|
|
#endif
|
|
|
|
#ifdef USE_VERTEX_LIGHTING
|
|
in vec4 diffuse_light_interp;
|
|
in vec4 specular_light_interp;
|
|
#endif
|
|
//omni and spot
|
|
|
|
struct LightData {
|
|
|
|
highp vec4 light_pos_inv_radius;
|
|
mediump vec4 light_direction_attenuation;
|
|
mediump vec4 light_color_energy;
|
|
mediump vec4 light_params; //cone attenuation, angle, specular, shadow enabled,
|
|
mediump vec4 light_clamp;
|
|
mediump vec4 shadow_color_contact;
|
|
highp mat4 shadow_matrix;
|
|
|
|
};
|
|
|
|
|
|
layout(std140) uniform OmniLightData { //ubo:4
|
|
|
|
LightData omni_lights[MAX_LIGHT_DATA_STRUCTS];
|
|
};
|
|
|
|
layout(std140) uniform SpotLightData { //ubo:5
|
|
|
|
LightData spot_lights[MAX_LIGHT_DATA_STRUCTS];
|
|
};
|
|
|
|
|
|
uniform highp sampler2DShadow shadow_atlas; //texunit:-5
|
|
|
|
|
|
struct ReflectionData {
|
|
|
|
mediump vec4 box_extents;
|
|
mediump vec4 box_offset;
|
|
mediump vec4 params; // intensity, 0, interior , boxproject
|
|
mediump vec4 ambient; //ambient color, energy
|
|
mediump vec4 atlas_clamp;
|
|
highp mat4 local_matrix; //up to here for spot and omni, rest is for directional
|
|
//notes: for ambientblend, use distance to edge to blend between already existing global environment
|
|
};
|
|
|
|
layout(std140) uniform ReflectionProbeData { //ubo:6
|
|
|
|
ReflectionData reflections[MAX_REFLECTION_DATA_STRUCTS];
|
|
};
|
|
uniform mediump sampler2D reflection_atlas; //texunit:-3
|
|
|
|
|
|
#ifdef USE_FORWARD_LIGHTING
|
|
|
|
uniform int omni_light_indices[MAX_FORWARD_LIGHTS];
|
|
uniform int omni_light_count;
|
|
|
|
uniform int spot_light_indices[MAX_FORWARD_LIGHTS];
|
|
uniform int spot_light_count;
|
|
|
|
uniform int reflection_indices[MAX_FORWARD_LIGHTS];
|
|
uniform int reflection_count;
|
|
|
|
#endif
|
|
|
|
|
|
#if defined(SCREEN_TEXTURE_USED)
|
|
|
|
uniform highp sampler2D screen_texture; //texunit:-7
|
|
|
|
#endif
|
|
|
|
#ifdef USE_MULTIPLE_RENDER_TARGETS
|
|
|
|
layout(location=0) out vec4 diffuse_buffer;
|
|
layout(location=1) out vec4 specular_buffer;
|
|
layout(location=2) out vec4 normal_mr_buffer;
|
|
#if defined(ENABLE_SSS)
|
|
layout(location=3) out float sss_buffer;
|
|
#endif
|
|
|
|
#else
|
|
|
|
layout(location=0) out vec4 frag_color;
|
|
|
|
#endif
|
|
|
|
in highp vec4 position_interp;
|
|
uniform highp sampler2D depth_buffer; //texunit:-8
|
|
|
|
#ifdef USE_CONTACT_SHADOWS
|
|
|
|
float contact_shadow_compute(vec3 pos, vec3 dir, float max_distance) {
|
|
|
|
if (abs(dir.z)>0.99)
|
|
return 1.0;
|
|
|
|
vec3 endpoint = pos+dir*max_distance;
|
|
vec4 source = position_interp;
|
|
vec4 dest = projection_matrix * vec4(endpoint, 1.0);
|
|
|
|
vec2 from_screen = (source.xy / source.w) * 0.5 + 0.5;
|
|
vec2 to_screen = (dest.xy / dest.w) * 0.5 + 0.5;
|
|
|
|
vec2 screen_rel = to_screen - from_screen;
|
|
|
|
if (length(screen_rel)<0.00001)
|
|
return 1.0; //too small, don't do anything
|
|
|
|
/*float pixel_size; //approximate pixel size
|
|
|
|
if (screen_rel.x > screen_rel.y) {
|
|
|
|
pixel_size = abs((pos.x-endpoint.x)/(screen_rel.x/screen_pixel_size.x));
|
|
} else {
|
|
pixel_size = abs((pos.y-endpoint.y)/(screen_rel.y/screen_pixel_size.y));
|
|
|
|
}*/
|
|
vec4 bias = projection_matrix * vec4(pos+vec3(0.0,0.0,0.04), 1.0); //todo un-harcode the 0.04
|
|
|
|
|
|
|
|
vec2 pixel_incr = normalize(screen_rel)*screen_pixel_size;
|
|
|
|
|
|
float steps = length(screen_rel) / length(pixel_incr);
|
|
steps = min(2000.0,steps); //put a limit to avoid freezing in some strange situation
|
|
//steps=10.0;
|
|
|
|
vec4 incr = (dest - source)/steps;
|
|
float ratio=0.0;
|
|
float ratio_incr = 1.0/steps;
|
|
|
|
while(steps>0.0) {
|
|
source += incr*2.0;
|
|
bias+=incr*2.0;
|
|
|
|
vec3 uv_depth = (source.xyz / source.w) * 0.5 + 0.5;
|
|
float depth = texture(depth_buffer,uv_depth.xy).r;
|
|
|
|
if (depth < uv_depth.z) {
|
|
if (depth > (bias.z/bias.w) * 0.5 + 0.5) {
|
|
return min(pow(ratio,4.0),1.0);
|
|
} else {
|
|
return 1.0;
|
|
}
|
|
}
|
|
|
|
|
|
ratio+=ratio_incr;
|
|
steps-=1.0;
|
|
}
|
|
|
|
return 1.0;
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
// This returns the G_GGX function divided by 2 cos_theta_m, where in practice cos_theta_m is either N.L or N.V.
|
|
// We're dividing this factor off because the overall term we'll end up looks like
|
|
// (see, for example, the first unnumbered equation in B. Burley, "Physically Based Shading at Disney", SIGGRAPH 2012):
|
|
//
|
|
// F(L.V) D(N.H) G(N.L) G(N.V) / (4 N.L N.V)
|
|
//
|
|
// We're basically regouping this as
|
|
//
|
|
// F(L.V) D(N.H) [G(N.L)/(2 N.L)] [G(N.V) / (2 N.V)]
|
|
//
|
|
// and thus, this function implements the [G(N.m)/(2 N.m)] part with m = L or V.
|
|
//
|
|
// The contents of the D and G (G1) functions (GGX) are taken from
|
|
// E. Heitz, "Understanding the Masking-Shadowing Function in Microfacet-Based BRDFs", J. Comp. Graph. Tech. 3 (2) (2014).
|
|
// Eqns 71-72 and 85-86 (see also Eqns 43 and 80).
|
|
|
|
float G_GGX_2cos(float cos_theta_m, float alpha) {
|
|
// Schlick's approximation
|
|
// C. Schlick, "An Inexpensive BRDF Model for Physically-based Rendering", Computer Graphics Forum. 13 (3): 233 (1994)
|
|
// Eq. (19), although see Heitz (2014) the about the problems with his derivation.
|
|
// It nevertheless approximates GGX well with k = alpha/2.
|
|
float k = 0.5*alpha;
|
|
return 0.5 / (cos_theta_m * (1.0 - k) + k);
|
|
|
|
// float cos2 = cos_theta_m*cos_theta_m;
|
|
// float sin2 = (1.0-cos2);
|
|
// return 1.0 /( cos_theta_m + sqrt(cos2 + alpha*alpha*sin2) );
|
|
}
|
|
|
|
float D_GGX(float cos_theta_m, float alpha) {
|
|
float alpha2 = alpha*alpha;
|
|
float d = 1.0 + (alpha2-1.0)*cos_theta_m*cos_theta_m;
|
|
return alpha2/(M_PI * d * d);
|
|
}
|
|
|
|
float G_GGX_anisotropic_2cos(float cos_theta_m, float alpha_x, float alpha_y, float cos_phi, float sin_phi) {
|
|
float cos2 = cos_theta_m * cos_theta_m;
|
|
float sin2 = (1.0-cos2);
|
|
float s_x = alpha_x * cos_phi;
|
|
float s_y = alpha_y * sin_phi;
|
|
return 1.0 / (cos_theta_m + sqrt(cos2 + (s_x*s_x + s_y*s_y)*sin2 ));
|
|
}
|
|
|
|
float D_GGX_anisotropic(float cos_theta_m, float alpha_x, float alpha_y, float cos_phi, float sin_phi) {
|
|
float cos2 = cos_theta_m * cos_theta_m;
|
|
float sin2 = (1.0-cos2);
|
|
float r_x = cos_phi/alpha_x;
|
|
float r_y = sin_phi/alpha_y;
|
|
float d = cos2 + sin2*(r_x * r_x + r_y * r_y);
|
|
return 1.0 / (M_PI * alpha_x * alpha_y * d * d );
|
|
}
|
|
|
|
|
|
float SchlickFresnel(float u)
|
|
{
|
|
float m = 1.0-u;
|
|
float m2 = m*m;
|
|
return m2*m2*m; // pow(m,5)
|
|
}
|
|
|
|
float GTR1(float NdotH, float a)
|
|
{
|
|
if (a >= 1.0) return 1.0/M_PI;
|
|
float a2 = a*a;
|
|
float t = 1.0 + (a2-1.0)*NdotH*NdotH;
|
|
return (a2-1.0) / (M_PI*log(a2)*t);
|
|
}
|
|
|
|
vec3 metallic_to_specular_color(float metallic, float specular, vec3 albedo) {
|
|
float dielectric = (0.034 * 2.0) * specular;
|
|
// energy conservation
|
|
return mix(vec3(dielectric), albedo, metallic); // TODO: reference?
|
|
}
|
|
|
|
void light_compute(vec3 N, vec3 L, vec3 V, vec3 B, vec3 T, vec3 light_color, vec3 attenuation, vec3 diffuse_color, vec3 transmission, float specular_blob_intensity, float roughness, float metallic, float rim, float rim_tint, float clearcoat, float clearcoat_gloss, float anisotropy, inout vec3 diffuse_light, inout vec3 specular_light) {
|
|
|
|
#if defined(USE_LIGHT_SHADER_CODE)
|
|
//light is written by the light shader
|
|
|
|
vec3 normal = N;
|
|
vec3 albedo = diffuse_color;
|
|
vec3 light = L;
|
|
vec3 view = V;
|
|
|
|
LIGHT_SHADER_CODE
|
|
|
|
|
|
#else
|
|
float NdotL = dot(N,L);
|
|
float cNdotL = max(NdotL, 0.0); // clamped NdotL
|
|
float NdotV = dot(N, V);
|
|
float cNdotV = max(NdotV, 0.0);
|
|
|
|
if (metallic < 1.0) {
|
|
#if defined(DIFFUSE_OREN_NAYAR)
|
|
vec3 diffuse_brdf_NL;
|
|
#else
|
|
float diffuse_brdf_NL; // BRDF times N.L for calculating diffuse radiance
|
|
#endif
|
|
|
|
|
|
#if defined(DIFFUSE_LAMBERT_WRAP)
|
|
//energy conserving lambert wrap shader
|
|
diffuse_brdf_NL = max(0.0,(NdotL + roughness) / ((1.0 + roughness) * (1.0 + roughness)));
|
|
|
|
#elif defined(DIFFUSE_OREN_NAYAR)
|
|
|
|
{
|
|
// see http://mimosa-pudica.net/improved-oren-nayar.html
|
|
float LdotV = dot(L, V);
|
|
|
|
|
|
float s = LdotV - NdotL * NdotV;
|
|
float t = mix(1.0, max(NdotL, NdotV), step(0.0, s));
|
|
|
|
float sigma2 = roughness * roughness; // TODO: this needs checking
|
|
vec3 A = 1.0 + sigma2 * (- 0.5 / (sigma2 + 0.33) + 0.17*diffuse_color / (sigma2 + 0.13) );
|
|
float B = 0.45 * sigma2 / (sigma2 + 0.09);
|
|
|
|
diffuse_brdf_NL = cNdotL * (A + vec3(B) * s / t) * (1.0 / M_PI);
|
|
}
|
|
|
|
#elif defined(DIFFUSE_TOON)
|
|
|
|
diffuse_brdf_NL = smoothstep(-roughness,max(roughness,0.01),NdotL);
|
|
|
|
#elif defined(DIFFUSE_BURLEY)
|
|
|
|
{
|
|
|
|
|
|
vec3 H = normalize(V + L);
|
|
float cLdotH = max(0.0,dot(L, H));
|
|
|
|
float FD90 = 0.5 + 2.0 * cLdotH * cLdotH * roughness;
|
|
float FdV = 1.0 + (FD90 - 1.0) * SchlickFresnel(cNdotV);
|
|
float FdL = 1.0 + (FD90 - 1.0) * SchlickFresnel(cNdotL);
|
|
diffuse_brdf_NL = (1.0 / M_PI) * FdV * FdL * cNdotL;
|
|
/*
|
|
float energyBias = mix(roughness, 0.0, 0.5);
|
|
float energyFactor = mix(roughness, 1.0, 1.0 / 1.51);
|
|
float fd90 = energyBias + 2.0 * VoH * VoH * roughness;
|
|
float f0 = 1.0;
|
|
float lightScatter = f0 + (fd90 - f0) * pow(1.0 - cNdotL, 5.0);
|
|
float viewScatter = f0 + (fd90 - f0) * pow(1.0 - cNdotV, 5.0);
|
|
|
|
diffuse_brdf_NL = lightScatter * viewScatter * energyFactor;*/
|
|
}
|
|
#else
|
|
//lambert
|
|
diffuse_brdf_NL = cNdotL * (1.0 / M_PI);
|
|
#endif
|
|
|
|
#if defined(TRANSMISSION_USED)
|
|
diffuse_light += light_color * diffuse_color * mix(vec3(diffuse_brdf_NL), vec3(M_PI), transmission) * attenuation;
|
|
#else
|
|
diffuse_light += light_color * diffuse_color * diffuse_brdf_NL * attenuation;
|
|
#endif
|
|
|
|
|
|
|
|
#if defined(LIGHT_USE_RIM)
|
|
float rim_light = pow(1.0-cNdotV, (1.0-roughness)*16.0);
|
|
diffuse_light += rim_light * rim * mix(vec3(1.0),diffuse_color,rim_tint) * light_color;
|
|
#endif
|
|
}
|
|
|
|
|
|
if (roughness > 0.0) { // FIXME: roughness == 0 should not disable specular light entirely
|
|
|
|
|
|
// D
|
|
|
|
#if defined(SPECULAR_BLINN)
|
|
|
|
vec3 H = normalize(V + L);
|
|
float cNdotH = max(dot(N,H), 0.0 );
|
|
float intensity = pow( cNdotH, (1.0-roughness) * 256.0);
|
|
specular_light += light_color * intensity * specular_blob_intensity * attenuation;
|
|
|
|
#elif defined(SPECULAR_PHONG)
|
|
|
|
vec3 R = normalize(-reflect(L,N));
|
|
float cRdotV = max(0.0,dot(R,V));
|
|
float intensity = pow( cRdotV, (1.0-roughness) * 256.0);
|
|
specular_light += light_color * intensity * specular_blob_intensity * attenuation;
|
|
|
|
#elif defined(SPECULAR_TOON)
|
|
|
|
vec3 R = normalize(-reflect(L,N));
|
|
float RdotV = dot(R,V);
|
|
float mid = 1.0-roughness;
|
|
mid*=mid;
|
|
float intensity = smoothstep(mid-roughness*0.5, mid+roughness*0.5, RdotV) * mid;
|
|
diffuse_light += light_color * intensity * specular_blob_intensity * attenuation; // write to diffuse_light, as in toon shading you generally want no reflection
|
|
|
|
#elif defined(SPECULAR_DISABLED)
|
|
//none..
|
|
|
|
#elif defined(SPECULAR_SCHLICK_GGX)
|
|
// shlick+ggx as default
|
|
|
|
vec3 H = normalize(V + L);
|
|
|
|
float cNdotH = max(dot(N,H), 0.0);
|
|
float cLdotH = max(dot(L,H), 0.0);
|
|
|
|
# if defined(LIGHT_USE_ANISOTROPY)
|
|
|
|
float aspect = sqrt(1.0-anisotropy*0.9);
|
|
float rx = roughness/aspect;
|
|
float ry = roughness*aspect;
|
|
float ax = rx*rx;
|
|
float ay = ry*ry;
|
|
float XdotH = dot( T, H );
|
|
float YdotH = dot( B, H );
|
|
float D = D_GGX_anisotropic(cNdotH, ax, ay, XdotH, YdotH);
|
|
float G = G_GGX_anisotropic_2cos(cNdotL, ax, ay, XdotH, YdotH) * G_GGX_anisotropic_2cos(cNdotV, ax, ay, XdotH, YdotH);
|
|
|
|
# else
|
|
float alpha = roughness * roughness;
|
|
float D = D_GGX(cNdotH, alpha);
|
|
float G = G_GGX_2cos(cNdotL, alpha) * G_GGX_2cos(cNdotV, alpha);
|
|
# endif
|
|
// F
|
|
float F0 = 1.0; // FIXME
|
|
float cLdotH5 = SchlickFresnel(cLdotH);
|
|
float F = mix(cLdotH5, 1.0, F0);
|
|
|
|
float specular_brdf_NL = cNdotL * D * F * G;
|
|
|
|
specular_light += specular_brdf_NL * light_color * specular_blob_intensity * attenuation;
|
|
#endif
|
|
|
|
#if defined(LIGHT_USE_CLEARCOAT)
|
|
if (clearcoat_gloss > 0.0) {
|
|
# if !defined(SPECULAR_SCHLICK_GGX) && !defined(SPECULAR_BLINN)
|
|
vec3 H = normalize(V + L);
|
|
# endif
|
|
# if !defined(SPECULAR_SCHLICK_GGX)
|
|
float cNdotH = max(dot(N,H), 0.0);
|
|
float cLdotH = max(dot(L,H), 0.0);
|
|
float cLdotH5 = SchlickFresnel(cLdotH);
|
|
#endif
|
|
float Dr = GTR1(cNdotH, mix(.1, .001, clearcoat_gloss));
|
|
float Fr = mix(.04, 1.0, cLdotH5);
|
|
float Gr = G_GGX_2cos(cNdotL, .25) * G_GGX_2cos(cNdotV, .25);
|
|
|
|
|
|
float specular_brdf_NL = 0.25 * clearcoat * Gr * Fr * Dr * cNdotL;
|
|
|
|
specular_light += specular_brdf_NL * light_color * specular_blob_intensity * attenuation;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
#endif //defined(USE_LIGHT_SHADER_CODE)
|
|
}
|
|
|
|
|
|
float sample_shadow(highp sampler2DShadow shadow, vec2 shadow_pixel_size, vec2 pos, float depth, vec4 clamp_rect) {
|
|
|
|
#ifdef SHADOW_MODE_PCF_13
|
|
|
|
float avg=textureProj(shadow,vec4(pos,depth,1.0));
|
|
avg+=textureProj(shadow,vec4(pos+vec2(shadow_pixel_size.x,0.0),depth,1.0));
|
|
avg+=textureProj(shadow,vec4(pos+vec2(-shadow_pixel_size.x,0.0),depth,1.0));
|
|
avg+=textureProj(shadow,vec4(pos+vec2(0.0,shadow_pixel_size.y),depth,1.0));
|
|
avg+=textureProj(shadow,vec4(pos+vec2(0.0,-shadow_pixel_size.y),depth,1.0));
|
|
avg+=textureProj(shadow,vec4(pos+vec2(shadow_pixel_size.x,shadow_pixel_size.y),depth,1.0));
|
|
avg+=textureProj(shadow,vec4(pos+vec2(-shadow_pixel_size.x,shadow_pixel_size.y),depth,1.0));
|
|
avg+=textureProj(shadow,vec4(pos+vec2(shadow_pixel_size.x,-shadow_pixel_size.y),depth,1.0));
|
|
avg+=textureProj(shadow,vec4(pos+vec2(-shadow_pixel_size.x,-shadow_pixel_size.y),depth,1.0));
|
|
avg+=textureProj(shadow,vec4(pos+vec2(shadow_pixel_size.x*2.0,0.0),depth,1.0));
|
|
avg+=textureProj(shadow,vec4(pos+vec2(-shadow_pixel_size.x*2.0,0.0),depth,1.0));
|
|
avg+=textureProj(shadow,vec4(pos+vec2(0.0,shadow_pixel_size.y*2.0),depth,1.0));
|
|
avg+=textureProj(shadow,vec4(pos+vec2(0.0,-shadow_pixel_size.y*2.0),depth,1.0));
|
|
return avg*(1.0/13.0);
|
|
|
|
#elif defined(SHADOW_MODE_PCF_5)
|
|
|
|
float avg=textureProj(shadow,vec4(pos,depth,1.0));
|
|
avg+=textureProj(shadow,vec4(pos+vec2(shadow_pixel_size.x,0.0),depth,1.0));
|
|
avg+=textureProj(shadow,vec4(pos+vec2(-shadow_pixel_size.x,0.0),depth,1.0));
|
|
avg+=textureProj(shadow,vec4(pos+vec2(0.0,shadow_pixel_size.y),depth,1.0));
|
|
avg+=textureProj(shadow,vec4(pos+vec2(0.0,-shadow_pixel_size.y),depth,1.0));
|
|
return avg*(1.0/5.0);
|
|
|
|
#else
|
|
|
|
return textureProj(shadow,vec4(pos,depth,1.0));
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
#ifdef RENDER_DEPTH_DUAL_PARABOLOID
|
|
|
|
in highp float dp_clip;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#if 0
|
|
//need to save texture depth for this
|
|
|
|
vec3 light_transmittance(float translucency,vec3 light_vec, vec3 normal, vec3 pos, float distance) {
|
|
|
|
float scale = 8.25 * (1.0 - translucency) / subsurface_scatter_width;
|
|
float d = scale * distance;
|
|
|
|
/**
|
|
* Armed with the thickness, we can now calculate the color by means of the
|
|
* precalculated transmittance profile.
|
|
* (It can be precomputed into a texture, for maximum performance):
|
|
*/
|
|
float dd = -d * d;
|
|
vec3 profile = vec3(0.233, 0.455, 0.649) * exp(dd / 0.0064) +
|
|
vec3(0.1, 0.336, 0.344) * exp(dd / 0.0484) +
|
|
vec3(0.118, 0.198, 0.0) * exp(dd / 0.187) +
|
|
vec3(0.113, 0.007, 0.007) * exp(dd / 0.567) +
|
|
vec3(0.358, 0.004, 0.0) * exp(dd / 1.99) +
|
|
vec3(0.078, 0.0, 0.0) * exp(dd / 7.41);
|
|
|
|
/**
|
|
* Using the profile, we finally approximate the transmitted lighting from
|
|
* the back of the object:
|
|
*/
|
|
return profile * clamp(0.3 + dot(light_vec, normal),0.0,1.0);
|
|
}
|
|
#endif
|
|
|
|
void light_process_omni(int idx, vec3 vertex, vec3 eye_vec,vec3 normal,vec3 binormal, vec3 tangent, vec3 albedo, vec3 transmission, float roughness, float metallic, float rim, float rim_tint, float clearcoat, float clearcoat_gloss, float anisotropy, float p_blob_intensity, inout vec3 diffuse_light, inout vec3 specular_light) {
|
|
|
|
vec3 light_rel_vec = omni_lights[idx].light_pos_inv_radius.xyz-vertex;
|
|
float light_length = length( light_rel_vec );
|
|
float normalized_distance = light_length*omni_lights[idx].light_pos_inv_radius.w;
|
|
vec3 light_attenuation = vec3(pow( max(1.0 - normalized_distance, 0.0), omni_lights[idx].light_direction_attenuation.w ));
|
|
|
|
if (omni_lights[idx].light_params.w>0.5) {
|
|
//there is a shadowmap
|
|
|
|
highp vec3 splane=(omni_lights[idx].shadow_matrix * vec4(vertex,1.0)).xyz;
|
|
float shadow_len=length(splane);
|
|
splane=normalize(splane);
|
|
vec4 clamp_rect=omni_lights[idx].light_clamp;
|
|
|
|
if (splane.z>=0.0) {
|
|
|
|
splane.z+=1.0;
|
|
|
|
clamp_rect.y+=clamp_rect.w;
|
|
|
|
} else {
|
|
|
|
splane.z=1.0 - splane.z;
|
|
|
|
/*
|
|
if (clamp_rect.z<clamp_rect.w) {
|
|
clamp_rect.x+=clamp_rect.z;
|
|
} else {
|
|
clamp_rect.y+=clamp_rect.w;
|
|
}
|
|
*/
|
|
|
|
}
|
|
|
|
splane.xy/=splane.z;
|
|
splane.xy=splane.xy * 0.5 + 0.5;
|
|
splane.z = shadow_len * omni_lights[idx].light_pos_inv_radius.w;
|
|
|
|
splane.xy = clamp_rect.xy+splane.xy*clamp_rect.zw;
|
|
float shadow = sample_shadow(shadow_atlas,shadow_atlas_pixel_size,splane.xy,splane.z,clamp_rect);
|
|
|
|
#ifdef USE_CONTACT_SHADOWS
|
|
|
|
if (shadow>0.01 && omni_lights[idx].shadow_color_contact.a>0.0) {
|
|
|
|
float contact_shadow = contact_shadow_compute(vertex,normalize(light_rel_vec),min(light_length,omni_lights[idx].shadow_color_contact.a));
|
|
shadow=min(shadow,contact_shadow);
|
|
|
|
}
|
|
#endif
|
|
light_attenuation*=mix(omni_lights[idx].shadow_color_contact.rgb,vec3(1.0),shadow);
|
|
}
|
|
|
|
light_compute(normal,normalize(light_rel_vec),eye_vec,binormal,tangent,omni_lights[idx].light_color_energy.rgb,light_attenuation,albedo,transmission,omni_lights[idx].light_params.z*p_blob_intensity,roughness,metallic,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,diffuse_light,specular_light);
|
|
|
|
}
|
|
|
|
void light_process_spot(int idx, vec3 vertex, vec3 eye_vec, vec3 normal, vec3 binormal, vec3 tangent,vec3 albedo, vec3 transmission,float roughness, float metallic, float rim, float rim_tint, float clearcoat, float clearcoat_gloss,float anisotropy,float p_blob_intensity, inout vec3 diffuse_light, inout vec3 specular_light) {
|
|
|
|
vec3 light_rel_vec = spot_lights[idx].light_pos_inv_radius.xyz-vertex;
|
|
float light_length = length( light_rel_vec );
|
|
float normalized_distance = light_length*spot_lights[idx].light_pos_inv_radius.w;
|
|
vec3 light_attenuation = vec3(pow( max(1.0 - normalized_distance, 0.001), spot_lights[idx].light_direction_attenuation.w ));
|
|
vec3 spot_dir = spot_lights[idx].light_direction_attenuation.xyz;
|
|
float spot_cutoff=spot_lights[idx].light_params.y;
|
|
float scos = max(dot(-normalize(light_rel_vec), spot_dir),spot_cutoff);
|
|
float spot_rim = (1.0 - scos) / (1.0 - spot_cutoff);
|
|
light_attenuation *= 1.0 - pow( max(spot_rim,0.001), spot_lights[idx].light_params.x);
|
|
|
|
if (spot_lights[idx].light_params.w>0.5) {
|
|
//there is a shadowmap
|
|
highp vec4 splane=(spot_lights[idx].shadow_matrix * vec4(vertex,1.0));
|
|
splane.xyz/=splane.w;
|
|
|
|
float shadow = sample_shadow(shadow_atlas,shadow_atlas_pixel_size,splane.xy,splane.z,spot_lights[idx].light_clamp);
|
|
|
|
#ifdef USE_CONTACT_SHADOWS
|
|
if (shadow>0.01 && spot_lights[idx].shadow_color_contact.a>0.0) {
|
|
|
|
float contact_shadow = contact_shadow_compute(vertex,normalize(light_rel_vec),min(light_length,spot_lights[idx].shadow_color_contact.a));
|
|
shadow=min(shadow,contact_shadow);
|
|
|
|
}
|
|
#endif
|
|
light_attenuation*=mix(spot_lights[idx].shadow_color_contact.rgb,vec3(1.0),shadow);
|
|
}
|
|
|
|
light_compute(normal,normalize(light_rel_vec),eye_vec,binormal,tangent,spot_lights[idx].light_color_energy.rgb,light_attenuation,albedo,transmission,spot_lights[idx].light_params.z*p_blob_intensity,roughness,metallic,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,diffuse_light,specular_light);
|
|
|
|
}
|
|
|
|
void reflection_process(int idx, vec3 vertex, vec3 normal,vec3 binormal, vec3 tangent,float roughness,float anisotropy,vec3 ambient,vec3 skybox, inout highp vec4 reflection_accum,inout highp vec4 ambient_accum) {
|
|
|
|
vec3 ref_vec = normalize(reflect(vertex,normal));
|
|
vec3 local_pos = (reflections[idx].local_matrix * vec4(vertex,1.0)).xyz;
|
|
vec3 box_extents = reflections[idx].box_extents.xyz;
|
|
|
|
if (any(greaterThan(abs(local_pos),box_extents))) { //out of the reflection box
|
|
return;
|
|
}
|
|
|
|
vec3 inner_pos = abs(local_pos / box_extents);
|
|
float blend = max(inner_pos.x,max(inner_pos.y,inner_pos.z));
|
|
//make blend more rounded
|
|
blend=mix(length(inner_pos),blend,blend);
|
|
blend*=blend;
|
|
blend=1.001-blend;
|
|
|
|
if (reflections[idx].params.x>0.0){// compute reflection
|
|
|
|
vec3 local_ref_vec = (reflections[idx].local_matrix * vec4(ref_vec,0.0)).xyz;
|
|
|
|
if (reflections[idx].params.w > 0.5) { //box project
|
|
|
|
vec3 nrdir = normalize(local_ref_vec);
|
|
vec3 rbmax = (box_extents - local_pos)/nrdir;
|
|
vec3 rbmin = (-box_extents - local_pos)/nrdir;
|
|
|
|
|
|
vec3 rbminmax = mix(rbmin,rbmax,greaterThan(nrdir,vec3(0.0,0.0,0.0)));
|
|
|
|
float fa = min(min(rbminmax.x, rbminmax.y), rbminmax.z);
|
|
vec3 posonbox = local_pos + nrdir * fa;
|
|
local_ref_vec = posonbox - reflections[idx].box_offset.xyz;
|
|
}
|
|
|
|
|
|
vec4 clamp_rect=reflections[idx].atlas_clamp;
|
|
vec3 norm = normalize(local_ref_vec);
|
|
norm.xy/=1.0+abs(norm.z);
|
|
norm.xy=norm.xy * vec2(0.5,0.25) + vec2(0.5,0.25);
|
|
if (norm.z>0.0) {
|
|
norm.y=0.5-norm.y+0.5;
|
|
}
|
|
|
|
vec2 atlas_uv = norm.xy * clamp_rect.zw + clamp_rect.xy;
|
|
atlas_uv = clamp(atlas_uv,clamp_rect.xy,clamp_rect.xy+clamp_rect.zw);
|
|
|
|
highp vec4 reflection;
|
|
reflection.rgb = textureLod(reflection_atlas,atlas_uv,roughness*5.0).rgb;
|
|
|
|
if (reflections[idx].params.z < 0.5) {
|
|
reflection.rgb = mix(skybox,reflection.rgb,blend);
|
|
}
|
|
reflection.rgb*=reflections[idx].params.x;
|
|
reflection.a = blend;
|
|
reflection.rgb*=reflection.a;
|
|
|
|
reflection_accum+=reflection;
|
|
}
|
|
|
|
if (reflections[idx].ambient.a>0.0) { //compute ambient using skybox
|
|
|
|
|
|
vec3 local_amb_vec = (reflections[idx].local_matrix * vec4(normal,0.0)).xyz;
|
|
|
|
vec3 splane=normalize(local_amb_vec);
|
|
vec4 clamp_rect=reflections[idx].atlas_clamp;
|
|
|
|
splane.z*=-1.0;
|
|
if (splane.z>=0.0) {
|
|
splane.z+=1.0;
|
|
clamp_rect.y+=clamp_rect.w;
|
|
} else {
|
|
splane.z=1.0 - splane.z;
|
|
splane.y=-splane.y;
|
|
}
|
|
|
|
splane.xy/=splane.z;
|
|
splane.xy=splane.xy * 0.5 + 0.5;
|
|
|
|
splane.xy = splane.xy * clamp_rect.zw + clamp_rect.xy;
|
|
splane.xy = clamp(splane.xy,clamp_rect.xy,clamp_rect.xy+clamp_rect.zw);
|
|
|
|
highp vec4 ambient_out;
|
|
ambient_out.a=blend;
|
|
ambient_out.rgb = textureLod(reflection_atlas,splane.xy,5.0).rgb;
|
|
ambient_out.rgb=mix(reflections[idx].ambient.rgb,ambient_out.rgb,reflections[idx].ambient.a);
|
|
if (reflections[idx].params.z < 0.5) {
|
|
ambient_out.rgb = mix(ambient,ambient_out.rgb,blend);
|
|
}
|
|
|
|
ambient_out.rgb *= ambient_out.a;
|
|
ambient_accum+=ambient_out;
|
|
} else {
|
|
|
|
highp vec4 ambient_out;
|
|
ambient_out.a=blend;
|
|
ambient_out.rgb=reflections[idx].ambient.rgb;
|
|
if (reflections[idx].params.z < 0.5) {
|
|
ambient_out.rgb = mix(ambient,ambient_out.rgb,blend);
|
|
}
|
|
ambient_out.rgb *= ambient_out.a;
|
|
ambient_accum+=ambient_out;
|
|
|
|
}
|
|
}
|
|
|
|
#ifdef USE_GI_PROBES
|
|
|
|
uniform mediump sampler3D gi_probe1; //texunit:-9
|
|
uniform highp mat4 gi_probe_xform1;
|
|
uniform highp vec3 gi_probe_bounds1;
|
|
uniform highp vec3 gi_probe_cell_size1;
|
|
uniform highp float gi_probe_multiplier1;
|
|
uniform highp float gi_probe_bias1;
|
|
uniform highp float gi_probe_normal_bias1;
|
|
uniform bool gi_probe_blend_ambient1;
|
|
|
|
uniform mediump sampler3D gi_probe2; //texunit:-10
|
|
uniform highp mat4 gi_probe_xform2;
|
|
uniform highp vec3 gi_probe_bounds2;
|
|
uniform highp vec3 gi_probe_cell_size2;
|
|
uniform highp float gi_probe_multiplier2;
|
|
uniform highp float gi_probe_bias2;
|
|
uniform highp float gi_probe_normal_bias2;
|
|
uniform bool gi_probe2_enabled;
|
|
uniform bool gi_probe_blend_ambient2;
|
|
|
|
vec3 voxel_cone_trace(mediump sampler3D probe, vec3 cell_size, vec3 pos, vec3 ambient, bool blend_ambient, vec3 direction, float tan_half_angle, float max_distance, float p_bias) {
|
|
|
|
float dist = p_bias;//1.0; //dot(direction,mix(vec3(-1.0),vec3(1.0),greaterThan(direction,vec3(0.0))))*2.0;
|
|
float alpha=0.0;
|
|
vec3 color = vec3(0.0);
|
|
|
|
while(dist < max_distance && alpha < 0.95) {
|
|
float diameter = max(1.0, 2.0 * tan_half_angle * dist);
|
|
vec4 scolor = textureLod(probe, (pos + dist * direction) * cell_size, log2(diameter) );
|
|
float a = (1.0 - alpha);
|
|
color += scolor.rgb * a;
|
|
alpha += a * scolor.a;
|
|
dist += diameter * 0.5;
|
|
}
|
|
|
|
if (blend_ambient) {
|
|
color.rgb = mix(ambient,color.rgb,min(1.0,alpha/0.95));
|
|
}
|
|
|
|
return color;
|
|
}
|
|
|
|
void gi_probe_compute(mediump sampler3D probe, mat4 probe_xform, vec3 bounds,vec3 cell_size,vec3 pos, vec3 ambient, vec3 environment, bool blend_ambient,float multiplier, mat3 normal_mtx,vec3 ref_vec, float roughness,float p_bias,float p_normal_bias, inout vec4 out_spec, inout vec4 out_diff) {
|
|
|
|
|
|
|
|
vec3 probe_pos = (probe_xform * vec4(pos,1.0)).xyz;
|
|
vec3 ref_pos = (probe_xform * vec4(pos+ref_vec,1.0)).xyz;
|
|
ref_vec = normalize(ref_pos - probe_pos);
|
|
|
|
probe_pos+=(probe_xform * vec4(normal_mtx[2],0.0)).xyz*p_normal_bias;
|
|
|
|
/* out_diff.rgb = voxel_cone_trace(probe,cell_size,probe_pos,normalize((probe_xform * vec4(ref_vec,0.0)).xyz),0.0 ,100.0);
|
|
out_diff.a = 1.0;
|
|
return;*/
|
|
//out_diff = vec4(textureLod(probe,probe_pos*cell_size,3.0).rgb,1.0);
|
|
//return;
|
|
|
|
//this causes corrupted pixels, i have no idea why..
|
|
if (any(bvec2(any(lessThan(probe_pos,vec3(0.0))),any(greaterThan(probe_pos,bounds))))) {
|
|
return;
|
|
}
|
|
|
|
//vec3 blendv = probe_pos/bounds * 2.0 - 1.0;
|
|
//float blend = 1.001-max(blendv.x,max(blendv.y,blendv.z));
|
|
float blend=1.0;
|
|
|
|
float max_distance = length(bounds);
|
|
|
|
//radiance
|
|
#ifdef VCT_QUALITY_HIGH
|
|
|
|
#define MAX_CONE_DIRS 6
|
|
vec3 cone_dirs[MAX_CONE_DIRS] = vec3[] (
|
|
vec3(0, 0, 1),
|
|
vec3(0.866025, 0, 0.5),
|
|
vec3(0.267617, 0.823639, 0.5),
|
|
vec3(-0.700629, 0.509037, 0.5),
|
|
vec3(-0.700629, -0.509037, 0.5),
|
|
vec3(0.267617, -0.823639, 0.5)
|
|
);
|
|
|
|
float cone_weights[MAX_CONE_DIRS] = float[](0.25, 0.15, 0.15, 0.15, 0.15, 0.15);
|
|
float cone_angle_tan = 0.577;
|
|
float min_ref_tan = 0.0;
|
|
#else
|
|
|
|
#define MAX_CONE_DIRS 4
|
|
|
|
vec3 cone_dirs[MAX_CONE_DIRS] = vec3[] (
|
|
vec3(0.707107, 0, 0.707107),
|
|
vec3(0, 0.707107, 0.707107),
|
|
vec3(-0.707107, 0, 0.707107),
|
|
vec3(0, -0.707107, 0.707107)
|
|
);
|
|
|
|
float cone_weights[MAX_CONE_DIRS] = float[](0.25, 0.25, 0.25, 0.25);
|
|
float cone_angle_tan = 0.98269;
|
|
max_distance*=0.5;
|
|
float min_ref_tan = 0.2;
|
|
|
|
#endif
|
|
vec3 light=vec3(0.0);
|
|
for(int i=0;i<MAX_CONE_DIRS;i++) {
|
|
|
|
vec3 dir = normalize( (probe_xform * vec4(pos + normal_mtx * cone_dirs[i],1.0)).xyz - probe_pos);
|
|
light+=cone_weights[i] * voxel_cone_trace(probe,cell_size,probe_pos,ambient,blend_ambient,dir,cone_angle_tan,max_distance,p_bias);
|
|
|
|
}
|
|
|
|
light*=multiplier;
|
|
|
|
out_diff += vec4(light*blend,blend);
|
|
|
|
//irradiance
|
|
|
|
vec3 irr_light = voxel_cone_trace(probe,cell_size,probe_pos,environment,blend_ambient,ref_vec,max(min_ref_tan,tan(roughness * 0.5 * M_PI)) ,max_distance,p_bias);
|
|
|
|
irr_light *= multiplier;
|
|
//irr_light=vec3(0.0);
|
|
|
|
out_spec += vec4(irr_light*blend,blend);
|
|
|
|
}
|
|
|
|
|
|
void gi_probes_compute(vec3 pos, vec3 normal, float roughness, inout vec3 out_specular, inout vec3 out_ambient) {
|
|
|
|
roughness = roughness * roughness;
|
|
|
|
vec3 ref_vec = normalize(reflect(normalize(pos),normal));
|
|
|
|
//find arbitrary tangent and bitangent, then build a matrix
|
|
vec3 v0 = abs(normal.z) < 0.999 ? vec3(0, 0, 1) : vec3(0, 1, 0);
|
|
vec3 tangent = normalize(cross(v0, normal));
|
|
vec3 bitangent = normalize(cross(tangent, normal));
|
|
mat3 normal_mat = mat3(tangent,bitangent,normal);
|
|
|
|
vec4 diff_accum = vec4(0.0);
|
|
vec4 spec_accum = vec4(0.0);
|
|
|
|
vec3 ambient = out_ambient;
|
|
out_ambient = vec3(0.0);
|
|
|
|
vec3 environment = out_specular;
|
|
|
|
out_specular = vec3(0.0);
|
|
|
|
gi_probe_compute(gi_probe1,gi_probe_xform1,gi_probe_bounds1,gi_probe_cell_size1,pos,ambient,environment,gi_probe_blend_ambient1,gi_probe_multiplier1,normal_mat,ref_vec,roughness,gi_probe_bias1,gi_probe_normal_bias1,spec_accum,diff_accum);
|
|
|
|
if (gi_probe2_enabled) {
|
|
|
|
gi_probe_compute(gi_probe2,gi_probe_xform2,gi_probe_bounds2,gi_probe_cell_size2,pos,ambient,environment,gi_probe_blend_ambient2,gi_probe_multiplier2,normal_mat,ref_vec,roughness,gi_probe_bias2,gi_probe_normal_bias2,spec_accum,diff_accum);
|
|
}
|
|
|
|
if (diff_accum.a>0.0) {
|
|
diff_accum.rgb/=diff_accum.a;
|
|
}
|
|
|
|
if (spec_accum.a>0.0) {
|
|
spec_accum.rgb/=spec_accum.a;
|
|
}
|
|
|
|
out_specular+=spec_accum.rgb;
|
|
out_ambient+=diff_accum.rgb;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
void main() {
|
|
|
|
#ifdef RENDER_DEPTH_DUAL_PARABOLOID
|
|
|
|
if (dp_clip>0.0)
|
|
discard;
|
|
#endif
|
|
|
|
//lay out everything, whathever is unused is optimized away anyway
|
|
highp vec3 vertex = vertex_interp;
|
|
vec3 albedo = vec3(0.8,0.8,0.8);
|
|
vec3 transmission = vec3(0.0);
|
|
float metallic = 0.0;
|
|
float specular = 0.5;
|
|
vec3 emission = vec3(0.0,0.0,0.0);
|
|
float roughness = 1.0;
|
|
float rim = 0.0;
|
|
float rim_tint = 0.0;
|
|
float clearcoat=0.0;
|
|
float clearcoat_gloss=0.0;
|
|
float anisotropy = 1.0;
|
|
vec2 anisotropy_flow = vec2(1.0,0.0);
|
|
|
|
#if defined(ENABLE_AO)
|
|
float ao=1.0;
|
|
float ao_light_affect=0.0;
|
|
#endif
|
|
|
|
float alpha = 1.0;
|
|
|
|
#ifdef METERIAL_DOUBLESIDED
|
|
float side=float(gl_FrontFacing)*2.0-1.0;
|
|
#else
|
|
float side=1.0;
|
|
#endif
|
|
|
|
|
|
#if defined(ALPHA_SCISSOR_USED)
|
|
float alpha_scissor = 0.5;
|
|
#endif
|
|
|
|
#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
|
|
vec3 binormal = normalize(binormal_interp)*side;
|
|
vec3 tangent = normalize(tangent_interp)*side;
|
|
#else
|
|
vec3 binormal = vec3(0.0);
|
|
vec3 tangent = vec3(0.0);
|
|
#endif
|
|
vec3 normal = normalize(normal_interp)*side;
|
|
|
|
#if defined(ENABLE_UV_INTERP)
|
|
vec2 uv = uv_interp;
|
|
#endif
|
|
|
|
#if defined(ENABLE_UV2_INTERP)
|
|
vec2 uv2 = uv2_interp;
|
|
#endif
|
|
|
|
#if defined(ENABLE_COLOR_INTERP)
|
|
vec4 color = color_interp;
|
|
#endif
|
|
|
|
#if defined(ENABLE_NORMALMAP)
|
|
|
|
vec3 normalmap = vec3(0.0);
|
|
#endif
|
|
|
|
float normaldepth=1.0;
|
|
|
|
#if defined(SCREEN_UV_USED)
|
|
vec2 screen_uv = gl_FragCoord.xy*screen_pixel_size;
|
|
#endif
|
|
|
|
#if defined (ENABLE_SSS)
|
|
float sss_strength=0.0;
|
|
#endif
|
|
|
|
{
|
|
|
|
|
|
FRAGMENT_SHADER_CODE
|
|
|
|
}
|
|
|
|
|
|
#if defined(ALPHA_SCISSOR_USED)
|
|
if (alpha<alpha_scissor) {
|
|
discard;
|
|
}
|
|
#endif
|
|
|
|
#ifdef USE_OPAQUE_PREPASS
|
|
|
|
if (alpha<0.99) {
|
|
discard;
|
|
}
|
|
#endif
|
|
|
|
#if defined(ENABLE_NORMALMAP)
|
|
|
|
normalmap.xy=normalmap.xy*2.0-1.0;
|
|
normalmap.z=sqrt(1.0-dot(normalmap.xy,normalmap.xy)); //always ignore Z, as it can be RG packed, Z may be pos/neg, etc.
|
|
|
|
normal = normalize( mix(normal_interp,tangent * normalmap.x + binormal * normalmap.y + normal * normalmap.z,normaldepth) ) * side;
|
|
|
|
#endif
|
|
|
|
#if defined(LIGHT_USE_ANISOTROPY)
|
|
|
|
if (anisotropy>0.01) {
|
|
//rotation matrix
|
|
mat3 rot = mat3( tangent, binormal, normal );
|
|
//make local to space
|
|
tangent = normalize(rot * vec3(anisotropy_flow.x,anisotropy_flow.y,0.0));
|
|
binormal = normalize(rot * vec3(-anisotropy_flow.y,anisotropy_flow.x,0.0));
|
|
}
|
|
|
|
#endif
|
|
|
|
#ifdef ENABLE_CLIP_ALPHA
|
|
if (albedo.a<0.99) {
|
|
//used for doublepass and shadowmapping
|
|
discard;
|
|
}
|
|
#endif
|
|
|
|
/////////////////////// LIGHTING //////////////////////////////
|
|
|
|
//apply energy conservation
|
|
|
|
#ifdef USE_VERTEX_LIGHTING
|
|
|
|
vec3 specular_light = specular_light_interp.rgb;
|
|
vec3 diffuse_light = diffuse_light_interp.rgb;
|
|
#else
|
|
|
|
vec3 specular_light = vec3(0.0,0.0,0.0);
|
|
vec3 diffuse_light = vec3(0.0,0.0,0.0);
|
|
|
|
#endif
|
|
|
|
vec3 ambient_light;
|
|
vec3 env_reflection_light = vec3(0.0,0.0,0.0);
|
|
|
|
vec3 eye_vec = -normalize( vertex_interp );
|
|
|
|
|
|
|
|
#ifdef USE_RADIANCE_MAP
|
|
|
|
if (no_ambient_light) {
|
|
ambient_light=vec3(0.0,0.0,0.0);
|
|
} else {
|
|
{
|
|
|
|
{ //read radiance from dual paraboloid
|
|
|
|
vec3 ref_vec = reflect(-eye_vec,normal); //2.0 * ndotv * normal - view; // reflect(v, n);
|
|
ref_vec=normalize((radiance_inverse_xform * vec4(ref_vec,0.0)).xyz);
|
|
vec3 radiance = textureDualParaboloid(radiance_map,ref_vec,roughness) * bg_energy;
|
|
env_reflection_light = radiance;
|
|
|
|
}
|
|
//no longer a cubemap
|
|
//vec3 radiance = textureLod(radiance_cube, r, lod).xyz * ( brdf.x + brdf.y);
|
|
|
|
}
|
|
|
|
{
|
|
|
|
vec3 ambient_dir=normalize((radiance_inverse_xform * vec4(normal,0.0)).xyz);
|
|
vec3 env_ambient=textureDualParaboloid(radiance_map,ambient_dir,1.0) * bg_energy;
|
|
|
|
ambient_light=mix(ambient_light_color.rgb,env_ambient,radiance_ambient_contribution);
|
|
//ambient_light=vec3(0.0,0.0,0.0);
|
|
}
|
|
}
|
|
|
|
#else
|
|
|
|
if (no_ambient_light){
|
|
ambient_light=vec3(0.0,0.0,0.0);
|
|
} else {
|
|
ambient_light=ambient_light_color.rgb;
|
|
}
|
|
#endif
|
|
|
|
ambient_light*=ambient_energy;
|
|
|
|
float specular_blob_intensity=1.0;
|
|
#if defined(SPECULAR_TOON)
|
|
specular_blob_intensity*=specular * 2.0;
|
|
#endif
|
|
|
|
#if defined(USE_LIGHT_DIRECTIONAL)
|
|
|
|
vec3 light_attenuation=vec3(1.0);
|
|
|
|
float depth_z = -vertex.z;
|
|
#ifdef LIGHT_DIRECTIONAL_SHADOW
|
|
|
|
#ifdef LIGHT_USE_PSSM4
|
|
if (depth_z < shadow_split_offsets.w) {
|
|
#elif defined(LIGHT_USE_PSSM2)
|
|
if (depth_z < shadow_split_offsets.y) {
|
|
#else
|
|
if (depth_z < shadow_split_offsets.x) {
|
|
#endif //LIGHT_USE_PSSM4
|
|
|
|
vec3 pssm_coord;
|
|
float pssm_fade=0.0;
|
|
|
|
#ifdef LIGHT_USE_PSSM_BLEND
|
|
float pssm_blend;
|
|
vec3 pssm_coord2;
|
|
bool use_blend=true;
|
|
#endif
|
|
|
|
|
|
#ifdef LIGHT_USE_PSSM4
|
|
|
|
|
|
if (depth_z < shadow_split_offsets.y) {
|
|
|
|
if (depth_z < shadow_split_offsets.x) {
|
|
|
|
highp vec4 splane=(shadow_matrix1 * vec4(vertex,1.0));
|
|
pssm_coord=splane.xyz/splane.w;
|
|
|
|
|
|
#if defined(LIGHT_USE_PSSM_BLEND)
|
|
|
|
splane=(shadow_matrix2 * vec4(vertex,1.0));
|
|
pssm_coord2=splane.xyz/splane.w;
|
|
pssm_blend=smoothstep(0.0,shadow_split_offsets.x,depth_z);
|
|
#endif
|
|
|
|
} else {
|
|
|
|
highp vec4 splane=(shadow_matrix2 * vec4(vertex,1.0));
|
|
pssm_coord=splane.xyz/splane.w;
|
|
|
|
#if defined(LIGHT_USE_PSSM_BLEND)
|
|
splane=(shadow_matrix3 * vec4(vertex,1.0));
|
|
pssm_coord2=splane.xyz/splane.w;
|
|
pssm_blend=smoothstep(shadow_split_offsets.x,shadow_split_offsets.y,depth_z);
|
|
#endif
|
|
|
|
}
|
|
} else {
|
|
|
|
|
|
if (depth_z < shadow_split_offsets.z) {
|
|
|
|
highp vec4 splane=(shadow_matrix3 * vec4(vertex,1.0));
|
|
pssm_coord=splane.xyz/splane.w;
|
|
|
|
#if defined(LIGHT_USE_PSSM_BLEND)
|
|
splane=(shadow_matrix4 * vec4(vertex,1.0));
|
|
pssm_coord2=splane.xyz/splane.w;
|
|
pssm_blend=smoothstep(shadow_split_offsets.y,shadow_split_offsets.z,depth_z);
|
|
#endif
|
|
|
|
} else {
|
|
|
|
highp vec4 splane=(shadow_matrix4 * vec4(vertex,1.0));
|
|
pssm_coord=splane.xyz/splane.w;
|
|
pssm_fade = smoothstep(shadow_split_offsets.z,shadow_split_offsets.w,depth_z);
|
|
|
|
#if defined(LIGHT_USE_PSSM_BLEND)
|
|
use_blend=false;
|
|
|
|
#endif
|
|
|
|
}
|
|
}
|
|
|
|
|
|
|
|
#endif //LIGHT_USE_PSSM4
|
|
|
|
#ifdef LIGHT_USE_PSSM2
|
|
|
|
if (depth_z < shadow_split_offsets.x) {
|
|
|
|
highp vec4 splane=(shadow_matrix1 * vec4(vertex,1.0));
|
|
pssm_coord=splane.xyz/splane.w;
|
|
|
|
|
|
#if defined(LIGHT_USE_PSSM_BLEND)
|
|
|
|
splane=(shadow_matrix2 * vec4(vertex,1.0));
|
|
pssm_coord2=splane.xyz/splane.w;
|
|
pssm_blend=smoothstep(0.0,shadow_split_offsets.x,depth_z);
|
|
#endif
|
|
|
|
} else {
|
|
highp vec4 splane=(shadow_matrix2 * vec4(vertex,1.0));
|
|
pssm_coord=splane.xyz/splane.w;
|
|
pssm_fade = smoothstep(shadow_split_offsets.x,shadow_split_offsets.y,depth_z);
|
|
#if defined(LIGHT_USE_PSSM_BLEND)
|
|
use_blend=false;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
#endif //LIGHT_USE_PSSM2
|
|
|
|
#if !defined(LIGHT_USE_PSSM4) && !defined(LIGHT_USE_PSSM2)
|
|
{ //regular orthogonal
|
|
highp vec4 splane=(shadow_matrix1 * vec4(vertex,1.0));
|
|
pssm_coord=splane.xyz/splane.w;
|
|
}
|
|
#endif
|
|
|
|
|
|
//one one sample
|
|
|
|
float shadow = sample_shadow(directional_shadow,directional_shadow_pixel_size,pssm_coord.xy,pssm_coord.z,light_clamp);
|
|
|
|
#if defined(LIGHT_USE_PSSM_BLEND)
|
|
|
|
if (use_blend) {
|
|
shadow=mix(shadow, sample_shadow(directional_shadow,directional_shadow_pixel_size,pssm_coord2.xy,pssm_coord2.z,light_clamp),pssm_blend);
|
|
}
|
|
#endif
|
|
|
|
#ifdef USE_CONTACT_SHADOWS
|
|
if (shadow>0.01 && shadow_color_contact.a>0.0) {
|
|
|
|
float contact_shadow = contact_shadow_compute(vertex,-light_direction_attenuation.xyz,shadow_color_contact.a);
|
|
shadow=min(shadow,contact_shadow);
|
|
|
|
}
|
|
#endif
|
|
light_attenuation=mix(mix(shadow_color_contact.rgb,vec3(1.0),shadow),vec3(1.0),pssm_fade);
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}
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#endif //LIGHT_DIRECTIONAL_SHADOW
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#ifdef USE_VERTEX_LIGHTING
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diffuse_light*=mix(vec3(1.0),light_attenuation,diffuse_light_interp.a);
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specular_light*=mix(vec3(1.0),light_attenuation,specular_light_interp.a);
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#else
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light_compute(normal,-light_direction_attenuation.xyz,eye_vec,binormal,tangent,light_color_energy.rgb,light_attenuation,albedo,transmission,light_params.z*specular_blob_intensity,roughness,metallic,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,diffuse_light,specular_light);
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#endif
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#endif //#USE_LIGHT_DIRECTIONAL
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#ifdef USE_GI_PROBES
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gi_probes_compute(vertex,normal,roughness,env_reflection_light,ambient_light);
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#endif
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#ifdef USE_FORWARD_LIGHTING
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highp vec4 reflection_accum = vec4(0.0,0.0,0.0,0.0);
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highp vec4 ambient_accum = vec4(0.0,0.0,0.0,0.0);
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for(int i=0;i<reflection_count;i++) {
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reflection_process(reflection_indices[i],vertex,normal,binormal,tangent,roughness,anisotropy,ambient_light,env_reflection_light,reflection_accum,ambient_accum);
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}
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|
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if (reflection_accum.a>0.0) {
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specular_light+=reflection_accum.rgb/reflection_accum.a;
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} else {
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specular_light+=env_reflection_light;
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}
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if (ambient_accum.a>0.0) {
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ambient_light+=ambient_accum.rgb/ambient_accum.a;
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}
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#ifdef USE_VERTEX_LIGHTING
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|
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diffuse_light*=albedo;
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|
#else
|
|
|
|
for(int i=0;i<omni_light_count;i++) {
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light_process_omni(omni_light_indices[i],vertex,eye_vec,normal,binormal,tangent,albedo,transmission,roughness,metallic,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,specular_blob_intensity,diffuse_light,specular_light);
|
|
}
|
|
|
|
for(int i=0;i<spot_light_count;i++) {
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|
light_process_spot(spot_light_indices[i],vertex,eye_vec,normal,binormal,tangent,albedo,transmission,roughness,metallic,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,specular_blob_intensity,diffuse_light,specular_light);
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|
}
|
|
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|
#endif //USE_VERTEX_LIGHTING
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#ifdef RENDER_DEPTH
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|
//nothing happens, so a tree-ssa optimizer will result in no fragment shader :)
|
|
#else
|
|
|
|
specular_light*=reflection_multiplier;
|
|
ambient_light*=albedo; //ambient must be multiplied by albedo at the end
|
|
|
|
#if defined(ENABLE_AO)
|
|
ambient_light*=ao;
|
|
ao_light_affect = mix(1.0,ao,ao_light_affect);
|
|
specular_light*=ao_light_affect;
|
|
diffuse_light*=ao_light_affect;
|
|
#endif
|
|
|
|
|
|
|
|
//energy conservation
|
|
diffuse_light *= 1.0-metallic; // TODO: avoid all diffuse and ambient light calculations when metallic == 1 up to this point
|
|
ambient_light *= 1.0-metallic;
|
|
|
|
|
|
{
|
|
|
|
#if defined(DIFFUSE_TOON)
|
|
//simplify for toon, as
|
|
specular_light *= specular * metallic * albedo * 2.0;
|
|
#else
|
|
// Environment brdf approximation (Lazarov 2013)
|
|
// see https://www.unrealengine.com/en-US/blog/physically-based-shading-on-mobile
|
|
const vec4 c0 = vec4(-1.0, -0.0275, -0.572, 0.022);
|
|
const vec4 c1 = vec4( 1.0, 0.0425, 1.04, -0.04);
|
|
vec4 r = roughness * c0 + c1;
|
|
float ndotv = clamp(dot(normal,eye_vec),0.0,1.0);
|
|
float a004 = min( r.x * r.x, exp2( -9.28 * ndotv ) ) * r.x + r.y;
|
|
vec2 AB = vec2( -1.04, 1.04 ) * a004 + r.zw;
|
|
|
|
vec3 specular_color = metallic_to_specular_color(metallic, specular, albedo);
|
|
specular_light *= AB.x * specular_color + AB.y;
|
|
#endif
|
|
|
|
}
|
|
|
|
if (fog_color_enabled.a > 0.5) {
|
|
|
|
float fog_amount=0.0;
|
|
|
|
|
|
|
|
#ifdef USE_LIGHT_DIRECTIONAL
|
|
|
|
vec3 fog_color = mix( fog_color_enabled.rgb, fog_sun_color_amount.rgb,fog_sun_color_amount.a * pow(max( dot(normalize(vertex),-light_direction_attenuation.xyz), 0.0),8.0) );
|
|
#else
|
|
|
|
vec3 fog_color = fog_color_enabled.rgb;
|
|
#endif
|
|
|
|
//apply fog
|
|
|
|
if (fog_depth_enabled) {
|
|
|
|
float fog_z = smoothstep(fog_depth_begin,z_far,length(vertex));
|
|
|
|
fog_amount = pow(fog_z,fog_depth_curve);
|
|
if (fog_transmit_enabled) {
|
|
vec3 total_light = emission + ambient_light + specular_light + diffuse_light;
|
|
float transmit = pow(fog_z,fog_transmit_curve);
|
|
fog_color = mix(max(total_light,fog_color),fog_color,transmit);
|
|
}
|
|
}
|
|
|
|
if (fog_height_enabled) {
|
|
float y = (camera_matrix * vec4(vertex,1.0)).y;
|
|
fog_amount = max(fog_amount,pow(smoothstep(fog_height_min,fog_height_max,y),fog_height_curve));
|
|
}
|
|
|
|
float rev_amount = 1.0 - fog_amount;
|
|
|
|
|
|
emission = emission * rev_amount + fog_color * fog_amount;
|
|
ambient_light*=rev_amount;
|
|
specular_light*rev_amount;
|
|
diffuse_light*=rev_amount;
|
|
|
|
}
|
|
|
|
#ifdef USE_MULTIPLE_RENDER_TARGETS
|
|
|
|
|
|
#ifdef SHADELESS
|
|
diffuse_buffer=vec4(albedo.rgb,0.0);
|
|
specular_buffer=vec4(0.0);
|
|
|
|
#else
|
|
|
|
#if defined(ENABLE_AO)
|
|
|
|
float ambient_scale=0.0; // AO is supplied by material
|
|
#else
|
|
//approximate ambient scale for SSAO, since we will lack full ambient
|
|
float max_emission=max(emission.r,max(emission.g,emission.b));
|
|
float max_ambient=max(ambient_light.r,max(ambient_light.g,ambient_light.b));
|
|
float max_diffuse=max(diffuse_light.r,max(diffuse_light.g,diffuse_light.b));
|
|
float total_ambient = max_ambient+max_diffuse+max_emission;
|
|
float ambient_scale = (total_ambient>0.0) ? (max_ambient+ambient_occlusion_affect_light*max_diffuse)/total_ambient : 0.0;
|
|
#endif //ENABLE_AO
|
|
|
|
diffuse_buffer=vec4(emission+diffuse_light+ambient_light,ambient_scale);
|
|
specular_buffer=vec4(specular_light,metallic);
|
|
|
|
#endif //SHADELESS
|
|
|
|
normal_mr_buffer=vec4(normalize(normal)*0.5+0.5,roughness);
|
|
|
|
#if defined (ENABLE_SSS)
|
|
sss_buffer = sss_strength;
|
|
#endif
|
|
|
|
|
|
#else //USE_MULTIPLE_RENDER_TARGETS
|
|
|
|
|
|
#ifdef SHADELESS
|
|
frag_color=vec4(albedo,alpha);
|
|
#else
|
|
frag_color=vec4(emission+ambient_light+diffuse_light+specular_light,alpha);
|
|
#endif //SHADELESS
|
|
|
|
|
|
#endif //USE_MULTIPLE_RENDER_TARGETS
|
|
|
|
|
|
|
|
#endif //RENDER_DEPTH
|
|
|
|
|
|
}
|