158 lines
3.7 KiB
GLSL
158 lines
3.7 KiB
GLSL
#version 430 core
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layout (location = 0) out vec4 outColor;
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layout (location = 1) out vec4 BrightColor;
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float AMBIENT = 0.05;
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float PI = 3.14159;
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uniform sampler2D colorTexture;
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uniform sampler2D textureNormal;
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uniform vec3 color;
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uniform vec3 lightPos;
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uniform vec3 lightColor;
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uniform vec3 cameraPos;
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uniform bool atmosphereCheck;
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uniform bool toneMappingCheck;
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uniform float time;
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uniform float cloudIntensity;
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uniform float cloudMotion;
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uniform float cloudBrightness;
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in vec3 vecNormal;
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in vec3 worldPos;
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in vec2 vtc;
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in vec3 viewDirTS;
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in vec3 lightDirTS;
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in vec3 sunDirTS;
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vec3 toneMapping(vec3 color)
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{
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float exposure = 0.06;
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vec3 mapped = 1 - exp(-color * exposure);
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return mapped;
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}
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float random (in vec2 st) {
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return fract(sin(dot(st.xy,
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vec2(12.9898,78.233)))*
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43758.5453123);
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}
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float noise (in vec2 st) {
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vec2 i = floor(st);
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vec2 f = fract(st);
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// Four corners in 2D of a tile
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float a = random(i);
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float b = random(i + vec2(1.0, 0.0));
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float c = random(i + vec2(0.0, 1.0));
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float d = random(i + vec2(1.0, 1.0));
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vec2 u = f * f * (3.0 - 2.0 * f);
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return mix(a, b, u.x) +
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(c - a)* u.y * (1.0 - u.x) +
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(d - b) * u.x * u.y;
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}
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#define OCTAVES 6
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float fbm (in vec2 st) {
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// Initial values
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float value = 0.0;
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float amplitude = .5;
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float frequency = 0.;
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// Loop of octaves
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for (int i = 0; i < OCTAVES; i++) {
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value += amplitude * noise(st);
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st *= 2.;
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amplitude *= .5;
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}
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return value;
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}
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vec3 noiseColor() {
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vec2 st = vtc.xy;
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vec2 mirroredSt = vec2(1.0 - st.x, st.y);
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float timeOffset = time * cloudMotion;
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st.x -= timeOffset;
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mirroredSt.x += timeOffset; // Inverse direction for mirrored effect
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st.x = fract(st.x);
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mirroredSt.x = fract(mirroredSt.x);
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vec3 color = vec3(fbm(st * cloudIntensity));
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vec3 mirroredColor = vec3(fbm(mirroredSt * cloudIntensity));
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float blend = smoothstep(0.45, 0.55, st.x);
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vec3 noiseColor = mix(color, mirroredColor, blend);
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return noiseColor;
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}
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void main()
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{
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vec3 normal = normalize(vecNormal);
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vec3 viewDir = normalize(cameraPos - worldPos);
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vec3 lightDir = normalize(lightPos - worldPos);
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float diffuse = max(0, dot(normal, lightDir));
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vec3 textureColor = texture2D(colorTexture, vtc).rgb;
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vec3 N = texture2D(textureNormal, vtc).rgb;
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vec3 normalTexture = normalize((N * 2.0 - 1.0));
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float diffuseNormal = max(0, dot(normalTexture, lightDir));
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if (atmosphereCheck)
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{
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float atmosphereDot = dot(normal, viewDir);
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vec3 atmosphereColor = vec3(0.0, 0.44, 1.0);
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textureColor = mix(textureColor, atmosphereColor, pow(1 - atmosphereDot, 3));
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}
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vec3 diffuseColor = textureColor * min(1, AMBIENT + diffuse) * min(1, AMBIENT + diffuseNormal);
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vec3 toneMappedColor;
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if (toneMappingCheck)
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{
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vec3 distance = lightColor / pow(length(lightPos - worldPos), 2.0) * 1000;
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toneMappedColor = toneMapping(diffuseColor * distance);
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//gamma correction
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toneMappedColor = pow(toneMappedColor, vec3(1.0/2.2));
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}
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else
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toneMappedColor = diffuseColor;
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vec3 finalColor;
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if (atmosphereCheck)
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{
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vec3 noiseColor = noiseColor() * min(1, 20.0 * max(0.02, dot(normal, lightDir))) * lightColor * cloudBrightness;
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finalColor = mix(toneMappedColor, noiseColor, noiseColor.r);
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}
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else
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finalColor = toneMappedColor;
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float brightness = dot(finalColor, vec3(0.2126, 0.7152, 0.0722));
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if(brightness > 0.2)
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BrightColor = vec4(finalColor, 1.0);
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else
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BrightColor = vec4(0.0, 0.0, 0.0, 1.0);
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outColor = vec4(finalColor, 1.0);
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} |