57 lines
2.8 KiB
GLSL
57 lines
2.8 KiB
GLSL
float rainbowTime = sqrt3(max(pow2(pow2(sunVisibility * shadowFade)) - timeBrightness * 2.5, 0.0));
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#ifdef RAINBOW_AFTER_RAIN_CHECK
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rainbowTime *= sqrt3(max(wetness - 0.1, 0.0) * (1.0 - rainStrength) * (1.0 - rainStrengthS)) * isRainy;
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#endif
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if (rainbowTime > 0.001) {
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float rainbowDistance = max(far, 256.0) * 0.25;
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float rainbowLength = max(far, 256.0) * 0.75;
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vec3 rainbowTranslucent = translucent;
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if (water) rainbowTranslucent = vec3(float(isEyeInWater == 1));
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vec4 viewPosZ1 = gbufferProjectionInverse * (vec4(texCoord, z1, 1.0) * 2.0 - 1.0);
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viewPosZ1 /= viewPosZ1.w;
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float lViewPosZ1 = length(viewPosZ1.xyz);
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float lViewPosZ0 = length(viewPos.xyz);
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float rainbowCoord = 1.0 - (cosS + 0.75) / (0.0625 * RAINBOW_DIAMETER);
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float rainbowFactor = clamp(1.0 - rainbowCoord, 0.0, 1.0) * clamp(rainbowCoord, 0.0, 1.0);
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rainbowFactor *= rainbowFactor * (3.0 - 2.0 * rainbowFactor);
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rainbowFactor *= min(max(lViewPosZ1 - rainbowDistance, 0.0) / rainbowLength, 1.0);
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rainbowFactor *= rainbowTime;
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#ifdef CAVE_SKY_FIX
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rainbowFactor *= 1.0 - isEyeInCave;
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#endif
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if (rainbowFactor > 0.0) {
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#if RAINBOW_STYLE == 1
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float rainbowCoordM = pow(rainbowCoord, 1.4 + max(rainbowCoord - 0.5, 0.0) * 1.6);
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rainbowCoordM = smoothstep(0.0, 1.0, rainbowCoordM) * 0.85;
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rainbowCoordM += (dither - 0.5) * 0.1;
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vec3 rainbow = clamp(abs(mod(rainbowCoordM * 6.0 + vec3(-0.55,4.3,2.2) ,6.0)-3.0)-1.0, 0.0, 1.0);
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rainbowCoordM += 0.1;
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rainbow += clamp(abs(mod(rainbowCoordM * 6.0 + vec3(-0.55,4.3,2.2) ,6.0)-3.0)-1.0, 0.0, 1.0);
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rainbowCoordM -= 0.2;
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rainbow += clamp(abs(mod(rainbowCoordM * 6.0 + vec3(-0.55,4.3,2.2) ,6.0)-3.0)-1.0, 0.0, 1.0);
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rainbow /= 3.0;
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rainbow.r += pow2(max(rainbowCoord - 0.5, 0.0)) * (max(1.0 - rainbowCoord, 0.0)) * 26.0;
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rainbow = pow(rainbow, vec3(2.2)) * vec3(0.25, 0.075, 0.25) * 3.0;
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#else
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float rainbowCoordM = pow(rainbowCoord, 1.35);
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rainbowCoordM = smoothstep(0.0, 1.0, rainbowCoordM);
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vec3 rainbow = clamp(abs(mod(rainbowCoordM * 6.0 + vec3(0.0,4.0,2.0) ,6.0)-3.0)-1.0, 0.0, 1.0);
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rainbow *= rainbow * (3.0 - 2.0 * rainbow);
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rainbow = pow(rainbow, vec3(2.2)) * vec3(0.25, 0.075, 0.25) * 3.0;
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#endif
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if (z1 > z0 && lViewPosZ0 < rainbowDistance + rainbowLength)
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rainbow *= mix(rainbowTranslucent, vec3(1.0),
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clamp((lViewPosZ0 - rainbowDistance) / rainbowLength, 0.0, 1.0)
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);
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if (isEyeInWater == 1) rainbow *= float(water) * 0.05;
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color.rgb += rainbow * rainbowFactor;
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}
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} |