2024-01-14 00:49:30 +01:00
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#version 430 core
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2024-01-29 00:54:18 +01:00
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float PI = 3.14159f;
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uniform sampler2D colorTexture;
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uniform float exposition;
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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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out vec4 outColor;
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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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uniform float u_time;
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float pi = 3.14159;
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// 2D Random
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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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// 2D Noise based on Morgan McGuire @morgan3d
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// https://www.shadertoy.com/view/4dS3Wd
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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 randA = vec2(a *2.0 *pi);
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vec2 randB = vec2(b *2.0 *pi);
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vec2 randC = vec2(c *2.0 *pi);
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vec2 randD = vec2(d *2.0 *pi);
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vec2 offsetA = a-st;
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vec2 offsetB = b-st;
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vec2 offsetC = c-st;
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vec2 offsetD = d-st;
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offsetA = offsetA*randA;
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offsetB = offsetB*randB;
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offsetC = offsetC*randC;
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offsetD = offsetD*randD;
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float resA = smoothstep(offsetA.x,offsetA.y, f.y);
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float resB = smoothstep(offsetB.x,offsetB.y, f.y);
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float resC = smoothstep(offsetC.x,offsetC.y, f.y);
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float resD = smoothstep(offsetD.x,offsetD.y, f.y);
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vec2 u = smoothstep(0.,1.,f);
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float ab= mix(a, b, u.x);
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float cd = mix(c, d, u.x);
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return mix(ab,cd,u.y);
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}
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2024-01-14 00:49:30 +01:00
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void main()
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2024-01-29 00:54:18 +01:00
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{
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vec2 st = vtc;
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vec2 pos = vec2(st*3.776);
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// Use the noise function
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float n = 1.836 * 0.676*noise(pos*2.576);
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n = smoothstep(-0.096, 1.176, n);
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2024-01-14 00:49:30 +01:00
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2024-01-29 00:54:18 +01:00
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outColor = vec4(vec3(n), 1);
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}
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