59 lines
1.9 KiB
GLSL
59 lines
1.9 KiB
GLSL
#include "lighting.glsl"
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layout(location = 0) out vec4 outColor;
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layout(location = 0) in vec2 uv;
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layout(std140, binding = 0) uniform UniformSceneData
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{
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mat4 projection, view, model;
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vec4 cameraPosition, lightPosition;
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vec3 color;
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float radius;
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vec2 viewport;
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} sceneData;
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layout(binding = 1) uniform sampler2D positionSampler;
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layout(binding = 2) uniform sampler2D normalSampler;
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layout(binding = 3) uniform sampler2D albedoSampler;
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layout(binding = 4) uniform sampler2D materialSampler;
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vec2 CalcTexCoord()
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{
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return gl_FragCoord.xy / vec2(sceneData.viewport.x, sceneData.viewport.y);
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}
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void main() {
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vec3 FragPos = texture(positionSampler, CalcTexCoord()).rgb;
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vec3 Normal = texture(normalSampler, CalcTexCoord()).rgb;
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vec3 Albedo = texture(albedoSampler, CalcTexCoord()).rgb;
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float roughness = texture(materialSampler, CalcTexCoord()).r;
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float metallic = texture(materialSampler, CalcTexCoord()).g;
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float emission = texture(materialSampler, CalcTexCoord()).b;
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vec3 V = normalize(sceneData.cameraPosition.xyz - FragPos);
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vec3 F0 = vec3(0.04);
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F0 = mix(F0, Albedo, metallic);
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vec3 F = fresnelSchlickRoughness(max(dot(Normal, V), 0.0), F0, roughness);
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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 L = normalize(sceneData.lightPosition.xyz - FragPos);
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vec3 H = normalize(V + L);
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vec3 radiance = sceneData.color * (CalculateAttenuation(sceneData.lightPosition.xyz, sceneData.radius, FragPos) * sceneData.radius);
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float NDF = DistributionGGX(Normal, H, roughness);
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float G = GeometrySmith(Normal, V, L, roughness);
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vec3 nominator = NDF * G * F;
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float denominator = 4 * max(dot(V, Normal), 0.0) * max(dot(L, Normal), 0.0) + 0.001;
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vec3 brdf = nominator / denominator;
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// add to outgoing radiance Lo
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float NdotL = max(dot(Normal, L), 0.0);
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outColor = vec4(((kD * Albedo / PI + brdf) * radiance * NdotL), 1.0);
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}
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