godotengine
/
godot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Use interleaved gradient noise for distance fade 

This provides better visuals and performance compared to the previous
ordered dither.
This commit is contained in:
Hugo Locurcio 2021-07-09 00:01:47 +02:00
parent 44d3c8402e
commit e919e51a6b
No known key found for this signature in database
GPG Key ID: 39E8F8BE30B0A49C
1 changed files with 9 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
scene/resources/material.cpp
View File

@ -1278,38 +1278,21 @@ void BaseMaterial3D::_update_shader() {
if ((distance_fade == DISTANCE_FADE_OBJECT_DITHER || distance_fade == DISTANCE_FADE_PIXEL_DITHER)) {
if (!RenderingServer::get_singleton()->is_low_end()) {
code += " {\n";
if (distance_fade == DISTANCE_FADE_OBJECT_DITHER) {
code += " float fade_distance = abs((VIEW_MATRIX * MODEL_MATRIX[3]).z);\n";
} else {
code += " float fade_distance=-VERTEX.z;\n";
code += " float fade_distance = -VERTEX.z;\n";
}
// Use interleaved gradient noise, which is fast but still looks good.
code += " const vec3 magic = vec3(0.06711056f, 0.00583715f, 52.9829189f);";
code += " float fade = clamp(smoothstep(distance_fade_min, distance_fade_max, fade_distance), 0.0, 1.0);\n";
// Use a hard cap to prevent a few stray pixels from remaining when past the fade-out distance.
code += " if (fade < 0.001 || fade < fract(magic.z * fract(dot(FRAGCOORD.xy, magic.xy)))) {\n";
code += " discard;\n";
code += " }\n";
code += " float fade=clamp(smoothstep(distance_fade_min,distance_fade_max,fade_distance),0.0,1.0);\n";
code += " int x = int(FRAGCOORD.x) % 4;\n";
code += " int y = int(FRAGCOORD.y) % 4;\n";
code += " int index = x + y * 4;\n";
code += " float limit = 0.0;\n\n";
code += " if (x < 8) {\n";
code += " if (index == 0) limit = 0.0625;\n";
code += " if (index == 1) limit = 0.5625;\n";
code += " if (index == 2) limit = 0.1875;\n";
code += " if (index == 3) limit = 0.6875;\n";
code += " if (index == 4) limit = 0.8125;\n";
code += " if (index == 5) limit = 0.3125;\n";
code += " if (index == 6) limit = 0.9375;\n";
code += " if (index == 7) limit = 0.4375;\n";
code += " if (index == 8) limit = 0.25;\n";
code += " if (index == 9) limit = 0.75;\n";
code += " if (index == 10) limit = 0.125;\n";
code += " if (index == 11) limit = 0.625;\n";
code += " if (index == 12) limit = 1.0;\n";
code += " if (index == 13) limit = 0.5;\n";
code += " if (index == 14) limit = 0.875;\n";
code += " if (index == 15) limit = 0.375;\n";
code += " }\n\n";
code += " if (fade < limit)\n";
code += " discard;\n";
code += " }\n\n";
}