148 lines
3.9 KiB
GLSL
148 lines
3.9 KiB
GLSL
#version 430 core
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float AMBIENT = 0.03;
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float PI = 3.14;
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float shadowBias = 0.01;
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uniform sampler2D depthMap;
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uniform vec3 cameraPos;
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uniform vec3 color;
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uniform vec3 sunDir;
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uniform vec3 sunColor;
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uniform vec3 lightPos;
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uniform vec3 lightColor;
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uniform vec3 spotlightPos;
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uniform vec3 spotlightColor;
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uniform vec3 spotlightConeDir;
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uniform vec3 spotlightPhi;
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uniform float metallic;
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uniform float roughness;
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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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out vec4 outColor;
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in vec3 viewDirTS;
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in vec3 lightDirTS;
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in vec3 spotlightDirTS;
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in vec3 sunDirTS;
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in vec4 sunSpacePos;
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in vec3 test;
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float calculateShadow() {
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vec4 sunSpacePosU = sunSpacePos / sunSpacePos.w;
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vec4 sunSpacePosNormalized = sunSpacePosU * 0.5 + 0.5;
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float closestDepth = texture2D(depthMap, sunSpacePosNormalized.xy).r;
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if (closestDepth + shadowBias > sunSpacePosNormalized.z) {
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return 1.0;
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}
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return 0.0;
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}
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float DistributionGGX(vec3 normal, vec3 H, float roughness){
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float a = roughness*roughness;
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float a2 = a*a;
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float NdotH = max(dot(normal, H), 0.0);
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float NdotH2 = NdotH*NdotH;
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float num = a2;
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float denom = (NdotH2 * (a2 - 1.0) + 1.0);
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denom = PI * denom * denom;
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return num / denom;
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}
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float GeometrySchlickGGX(float NdotV, float roughness){
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float r = (roughness + 1.0);
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float k = (r*r) / 8.0;
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float num = NdotV;
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float denom = NdotV * (1.0 - k) + k;
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return num / denom;
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}
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float GeometrySmith(vec3 normal, vec3 V, vec3 lightDir, float roughness){
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float NdotV = max(dot(normal, V), 0.0);
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float NdotL = max(dot(normal, lightDir), 0.0);
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float ggx2 = GeometrySchlickGGX(NdotV, roughness);
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float ggx1 = GeometrySchlickGGX(NdotL, roughness);
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return ggx1 * ggx2;
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}
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vec3 fresnelSchlick(float cosTheta, vec3 F0){
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return F0 + (1.0 - F0) * pow(clamp(1.0 - cosTheta, 0.0, 1.0), 5.0);
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}
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vec3 PBRLight(vec3 lightDir, vec3 radiance, vec3 normal, vec3 V){
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float diffuse=max(0,dot(normal,lightDir));
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//vec3 V = normalize(cameraPos-worldPos);
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vec3 F0 = vec3(0.04);
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F0 = mix(F0, color, metallic);
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vec3 H = normalize(V + lightDir);
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// cook-torrance brdf
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float NDF = DistributionGGX(normal, H, roughness);
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float G = GeometrySmith(normal, V, lightDir, roughness);
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vec3 F = fresnelSchlick(max(dot(H, V), 0.0), F0);
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vec3 kS = F;
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vec3 kD = vec3(1.0) - kS;
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kD *= 1.0 - metallic;
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vec3 numerator = NDF * G * F;
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float denominator = 4.0 * max(dot(normal, V), 0.0) * max(dot(normal, lightDir), 0.0) + 0.0001;
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vec3 specular = numerator / denominator;
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// add to outgoing radiance Lo
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float NdotL = max(dot(normal, lightDir), 0.0);
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return (kD * color / PI + specular) * radiance * NdotL;
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}
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void main()
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{
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//vec3 normal = vec3(0,0,1);
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vec3 normal = normalize(vecNormal);
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//vec3 viewDir = normalize(viewDirTS);
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vec3 viewDir = normalize(cameraPos-worldPos);
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//vec3 lightDir = normalize(lightDirTS);
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vec3 lightDir = normalize(lightPos-worldPos);
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vec3 ambient = AMBIENT*color;
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vec3 attenuatedlightColor = lightColor/pow(length(lightPos-worldPos),2);
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vec3 ilumination;
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ilumination = ambient+PBRLight(lightDir,attenuatedlightColor,normal,viewDir);
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//flashlight
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//vec3 spotlightDir= normalize(spotlightDirTS);
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vec3 spotlightDir= normalize(spotlightPos-worldPos);
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float angle_atenuation = clamp((dot(-normalize(spotlightPos-worldPos),spotlightConeDir)-0.5)*3,0,1);
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attenuatedlightColor = angle_atenuation*spotlightColor/pow(length(spotlightPos-worldPos),2);
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ilumination=ilumination+PBRLight(spotlightDir,attenuatedlightColor,normal,viewDir);
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//sun
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ilumination=ilumination+PBRLight(sunDir, sunColor * calculateShadow(), normal, viewDir);
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outColor = vec4(vec3(1.0) - exp(-ilumination*exposition),1);
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//outColor = vec4(roughness,metallic,0,1);
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//outColor = vec4(test;
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}
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