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Define and use BACKGROUND_DEPTH_THRESHOLD constant for consistent background depth checks

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Victor Giers
2026-04-30 01:02:17 +02:00
parent f022dac380
commit 7919c59fd1
1 changed files with 7 additions and 5 deletions
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12
src/rendering/distance-fog-pass.ts
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@@ -199,6 +199,8 @@ uniform float heightFalloff;
varying vec2 vUv; varying vec2 vUv;
const float BACKGROUND_DEPTH_THRESHOLD = 0.9999999;
float readDepth(const in vec2 uv) { float readDepth(const in vec2 uv) {
#if DEPTH_PACKING == 3201 #if DEPTH_PACKING == 3201
return unpackRGBAToDepth(texture2D(depthBuffer, uv)); return unpackRGBAToDepth(texture2D(depthBuffer, uv));
@@ -226,7 +228,7 @@ vec3 getViewPosition(
float readViewDistance(const in vec2 uv, const in float fallbackDistance) { float readViewDistance(const in vec2 uv, const in float fallbackDistance) {
float sampleDepth = readDepth(clamp(uv, vec2(0.0), vec2(1.0))); float sampleDepth = readDepth(clamp(uv, vec2(0.0), vec2(1.0)));
if (sampleDepth >= 0.9999) { if (sampleDepth >= BACKGROUND_DEPTH_THRESHOLD) {
return fallbackDistance; return fallbackDistance;
} }
@@ -250,8 +252,8 @@ float getDepthEdgeMask(float centerDistance) {
vec3 sampleSkyColor(vec3 baseColor) { vec3 sampleSkyColor(vec3 baseColor) {
vec2 upperUv = vec2(vUv.x, 0.96); vec2 upperUv = vec2(vUv.x, 0.96);
vec2 horizonUv = vec2(vUv.x, 0.58); vec2 horizonUv = vec2(vUv.x, 0.58);
float upperSkyMask = smoothstep(0.999, 1.0, readDepth(upperUv)); float upperSkyMask = smoothstep(BACKGROUND_DEPTH_THRESHOLD, 1.0, readDepth(upperUv));
float horizonSkyMask = smoothstep(0.999, 1.0, readDepth(horizonUv)); float horizonSkyMask = smoothstep(BACKGROUND_DEPTH_THRESHOLD, 1.0, readDepth(horizonUv));
vec3 upperSky = texture2D(inputBuffer, upperUv).rgb; vec3 upperSky = texture2D(inputBuffer, upperUv).rgb;
vec3 horizonSky = texture2D(inputBuffer, horizonUv).rgb; vec3 horizonSky = texture2D(inputBuffer, horizonUv).rgb;
vec3 sampledSky = mix(upperSky, horizonSky, 0.58); vec3 sampledSky = mix(upperSky, horizonSky, 0.58);
@@ -268,8 +270,8 @@ void main() {
return; return;
} }
bool isBackground = depth >= 0.9999; bool isBackground = depth >= BACKGROUND_DEPTH_THRESHOLD;
float positionDepth = isBackground ? 0.9999 : depth; float positionDepth = isBackground ? BACKGROUND_DEPTH_THRESHOLD : depth;
float viewZ = getViewZ(positionDepth); float viewZ = getViewZ(positionDepth);
vec3 viewPosition = getViewPosition(vUv, positionDepth, viewZ); vec3 viewPosition = getViewPosition(vUv, positionDepth, viewZ);
vec3 worldPosition = (cameraWorldMatrix * vec4(viewPosition, 1.0)).xyz; vec3 worldPosition = (cameraWorldMatrix * vec4(viewPosition, 1.0)).xyz;