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Use circular fade instead of linear fade for distance fade 

This makes distance fade look the same regardless of the camera angle,
for all distance fade modes (Pixel Alpha, Pixel Dither, Object Dither).
Distance fade now behaves like fog in this regard.
This commit is contained in:
Hugo Locurcio 2021-07-08 23:17:22 +02:00
parent f3e6750a7e
commit d926be72ed
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GPG Key ID: 39E8F8BE30B0A49C
1 changed files with 5 additions and 4 deletions
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9
scene/resources/material.cpp
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@ -1252,15 +1252,16 @@ void BaseMaterial3D::_update_shader() {
}
if (distance_fade != DISTANCE_FADE_DISABLED) {
// Use the slightly more expensive circular fade (distance to the object) instead of linear
// (Z distance), so that the fade is always the same regardless of the camera angle.
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";
code += " float fade_distance = length((VIEW_MATRIX * MODEL_MATRIX[3]));\n";
} else {
code += " float fade_distance = -VERTEX.z;\n";
code += " float fade_distance = length(VERTEX);\n";
}
// Use interleaved gradient noise, which is fast but still looks good.
code += " const vec3 magic = vec3(0.06711056f, 0.00583715f, 52.9829189f);";
@ -1274,7 +1275,7 @@ void BaseMaterial3D::_update_shader() {
}
} else {
code += " ALPHA*=clamp(smoothstep(distance_fade_min,distance_fade_max,-VERTEX.z),0.0,1.0);\n";
code += " ALPHA *= clamp(smoothstep(distance_fade_min, distance_fade_max, length(VERTEX)), 0.0, 1.0);\n";
}
}