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temporarily force the cloud raymarcher to switch ray direction when inside the cloud plane

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Xonk
2025-03-10 21:39:02 -04:00
parent 0bbe877f38
commit 329ea6dbca
1 changed files with 10 additions and 3 deletions
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13
shaders/lib/volumetricClouds.glsl
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@ -375,7 +375,8 @@ vec3 getRayOrigin(
float maxHeight
){
vec3 cloudDist = vec3(1.0); cloudDist.xz = vec2(255.0);
vec3 cloudDist = vec3(1.0);
cloudDist.xz = mix(vec2(255.0), vec2(5.0), clamp(cameraPos.y - minHeight ,0.0,clamp((maxHeight-15)-cameraPosition.y ,0.0,1.0)));
// allow passing through/above/below the plane without limits
float flip = mix(max(cameraPos.y - maxHeight,0.0), max(minHeight - cameraPos.y,0.0), clamp(rayStartPos.y,0.0,1.0));
@ -419,6 +420,7 @@ vec4 GetVolumetricClouds(
vec3 signedSunVec = sunVector;
vec3 unignedSunVec = sunVector;// * (float(sunElevation > 1e-5)*2.0-1.0);
float SdotV = dot(unignedSunVec, NormPlayerPos.xyz);
#ifdef SKY_GROUND
NormPlayerPos.y += 0.03;
#endif
@ -429,7 +431,10 @@ vec4 GetVolumetricClouds(
// int samples = 30;
///------- setup the ray
vec3 cloudDist = vec3(1.0); cloudDist.xz = vec2(255.0);
// vec3 cloudDist = vec3(1.0); cloudDist.xz = mix(vec2(255.0), vec2(5.0), clamp(maxHeight - cameraPosition.y,0.0,1.0));
vec3 cloudDist = vec3(1.0);
cloudDist.xz = mix(vec2(255.0), vec2(5.0), clamp(cameraPosition.y - minHeight,0.0,clamp((maxHeight-15) - cameraPosition.y ,0.0,1.0)));
// vec3 rayDirection = NormPlayerPos.xyz * (cloudheight/abs(NormPlayerPos.y)/samples);
vec3 rayDirection = NormPlayerPos.xyz * (cloudheight/length(NormPlayerPos.xyz/cloudDist)/samples);
vec3 rayPosition = getRayOrigin(rayDirection, cameraPosition, dither.y, minHeight, maxHeight);
@ -476,6 +481,7 @@ vec4 GetVolumetricClouds(
minHeight = CloudLayer1_height;
maxHeight = cloudheight + minHeight;
cloudDist.xz = mix(vec2(255.0), vec2(5.0), clamp(cameraPosition.y - minHeight,0.0,clamp((maxHeight-15) - cameraPosition.y ,0.0,1.0)));
rayDirection = NormPlayerPos.xyz * (cloudheight/length(NormPlayerPos.xyz/cloudDist)/samples);
rayPosition = getRayOrigin(rayDirection, cameraPosition, dither.y, minHeight, maxHeight);
@ -489,7 +495,8 @@ vec4 GetVolumetricClouds(
cloudheight = 5.0;
minHeight = CloudLayer2_height;
maxHeight = cloudheight + minHeight;
cloudDist.xz = mix(vec2(255.0), vec2(5.0), clamp(cameraPosition.y - minHeight,0.0,clamp((maxHeight-15) - cameraPosition.y ,0.0,1.0)));
rayDirection = NormPlayerPos.xyz * (cloudheight/length(NormPlayerPos.xyz/cloudDist));
rayPosition = getRayOrigin(rayDirection, cameraPosition, dither.y, minHeight, maxHeight);