90 lines
2.9 KiB
HLSL
90 lines
2.9 KiB
HLSL
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#ifndef SUN_MOON_INCLUDED
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#define SUN_MOON_INCLUDED
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#include "JCommon.cginc"
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void CalculateSunMoonColorTextured(
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float4 localPos,
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sampler2D tex, float4x4 posToUvMatrix,
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fixed4 tintColor,
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float size, fixed softEdge, fixed glow,
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float4 direction,
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out fixed4 color)
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{
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fixed3 sunPos = -direction;
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fixed3 rayDir = localPos.xyz;
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fixed3 sunPlaneOrigin = sunPos;
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fixed3 sunPlaneNormal = sunPos;
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fixed rayLength = dot(sunPlaneOrigin, sunPlaneNormal)/(dot(rayDir, sunPlaneNormal)+0.000001);
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fixed3 intersectionPoint = rayDir*rayLength;
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fixed sqrDistanceToSun = SqrDistance(intersectionPoint, sunPos);
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fixed fSize = 1 - InverseLerpUnclamped(0, size*size*0.25, sqrDistanceToSun);
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fixed fGlow = 1 - InverseLerpUnclamped(0, size*size*400*glow*glow, sqrDistanceToSun);
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fGlow = saturate(fGlow);
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fixed4 clear = fixed4(0,0,0,0);
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fixed4 white = fixed4(1,1,1,1);
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fixed4 glowColor = fixed4(tintColor.xyz, fGlow*fGlow*fGlow*fGlow*fGlow*fGlow*glow);
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float4 uvSpacePos = mul(posToUvMatrix, localPos);
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fixed4 texColor = tex2D(tex, uvSpacePos.xy - float2(0.5, 0.5));
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texColor.a = lerp(0, texColor.a, SqrMagnitude(uvSpacePos.xy) <= 0.25);
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float texAlpha = texColor.a;
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float fSoftEdge = saturate(lerp(0, 1/(softEdge+0.0000001), fSize));
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texColor = lerp(glowColor, texColor, fSoftEdge*texAlpha);
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texColor.a = texAlpha*fSoftEdge;
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color = texColor + glowColor*glowColor.a;
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color *= tintColor;
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color.a = saturate(color.a);
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float dotProduct = dot(localPos.xyz, sunPos);
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color = lerp(clear, color, dotProduct >= 0);
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}
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void CalculateSunMoonColor(
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float4 localPos,
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fixed4 tintColor,
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float size, fixed softEdge, fixed glow,
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float4 direction,
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out fixed4 color)
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{
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fixed3 sunPos = -direction;
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fixed3 rayDir = localPos.xyz;
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fixed3 sunPlaneOrigin = sunPos;
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fixed3 sunPlaneNormal = sunPos;
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fixed rayLength = dot(sunPlaneOrigin, sunPlaneNormal)/(dot(rayDir, sunPlaneNormal)+0.000001);
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fixed3 intersectionPoint = rayDir*rayLength;
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fixed sqrDistanceToSun = SqrDistance(intersectionPoint, sunPos);
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fixed fSize = 1 - InverseLerpUnclamped(0, size*size*0.25, sqrDistanceToSun);
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fixed fGlow = 1 - InverseLerpUnclamped(0, size*size*400*glow*glow, sqrDistanceToSun);
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fGlow = saturate(fGlow);
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fixed4 clear = fixed4(0,0,0,0);
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fixed4 white = fixed4(1,1,1,1);
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fixed4 texColor = white;
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fixed4 glowColor = fixed4(tintColor.xyz, fGlow*fGlow*fGlow*fGlow*fGlow*fGlow*glow);
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fixed fSoftEdge = saturate(lerp(0, 1/(softEdge+0.0000001), fSize));
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texColor = lerp(glowColor, texColor, fSoftEdge);
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color = texColor + glowColor*glowColor.a*glowColor.a;
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color *= tintColor;
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color.a = saturate(color.a);
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fixed dotProduct = dot(localPos.xyz, sunPos);
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color = lerp(clear, color, dotProduct >= 0);
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}
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void CalculateSunMoonColorBaked(
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float4 localPos, float4x4 rotationMatrix,
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samplerCUBE sunCubemap,
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out fixed4 color)
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{
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localPos = mul(rotationMatrix, float4(localPos.xyz,0));
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color = texCUBE(sunCubemap, localPos.xyz);
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}
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#endif
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