70 lines
2.5 KiB
GLSL
70 lines
2.5 KiB
GLSL
#version 410
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layout(location = 0) in vec3 colorin;
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layout(location = 1) in vec3 normal;
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layout(location = 2) in vec3 pos;
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layout(location = 3) in vec4 lightviewpos[3];
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layout(location = 8) in vec2 UV;
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uniform int numLights;
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uniform sampler2D ShadowMaps[3];
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uniform vec3 lightpos[3];
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uniform vec3 lightColor[3];
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uniform float near;
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layout(location = 0) out vec4 colorOut;
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layout(location = 1) out float depth;
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const float ambientFactor = 0.25;
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const float diffuseFactor = 0.5;
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const float specFactor = 1.0;
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const float shininess = 16.0;
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const float screenGamma = 2.2;
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const float pitl = 2*3.14159265359 / 16.0;
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const float circlelength = 100000.0;
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bool isVisible(int i, vec2 offs, float lambertian)
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{
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vec2 size = textureSize(ShadowMaps[i], 0);
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float bias = (1.0 / (10.0 * max(size.x, size.y)))*sin(acos(lambertian));
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return !((texture(ShadowMaps[i],lightviewpos[i].xy + offs).x) < (lightviewpos[i].z - bias)) && lightviewpos[i].z > near * 2;
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}
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void main()
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{
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vec3 colorLinear = ambientFactor * colorin;
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for(int i = 0; i < numLights; i++){
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vec3 lightDir = -normalize(lightpos[i] - pos.xyz);
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float lambertian = dot(normalize(normal),lightDir);
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float cosTheta = clamp(dot(normalize(normal),-lightDir), 0.0, 1.0);
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float specular = 0;
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vec3 viewDir = normalize(-pos.xyz);
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vec3 halfDir = normalize(lightDir + viewDir);
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float specAngle = max(dot(halfDir, normalize(normal)), 0.0);
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specular = int(lambertian > 0)*pow(specAngle, shininess);
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//int visible = int(!(texture(ShadowMaps,lightpos[i].xy/2 + vec2(0.5,0.5)).z < (lightpos[i].z)));
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float visible = 0;
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int count = 0;
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vec2 texelSize = 1.0 / textureSize(ShadowMaps[i], 0);
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for(int x = -2; x <= 2; x++){
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for(int y = -2; y <= 2; y++){
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vec2 offs = vec2(x, y) * texelSize;
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visible += float(int(isVisible(i, offs, lambertian))) * 1.0/25.0;
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}
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}
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bool condition = visible >= (1.0/5.0);
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visible = float(condition) * 1.0 + float(!condition) * visible;
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colorLinear += (visible * 0.5 + 0.0) *(lambertian * diffuseFactor * colorin * lightColor[i] + specular * specFactor*colorin) * (200.0/(length(lightpos[i] - pos.xyz) * length(lightpos[i] - pos.xyz)));
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// colorLinear = vec3(visible, visible, visible);
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}
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vec3 colorGammaCorrected = colorLinear;//pow(colorLinear, vec3(1.0/screenGamma));
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colorOut = vec4(colorGammaCorrected,1.0);
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depth = gl_FragCoord.z;
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} |