51 lines
1.3 KiB
HLSL
51 lines
1.3 KiB
HLSL
#include "Defines.hlsli"
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#include "Helpers.hlsli"
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#include "Lights.hlsli"
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// temporary
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#define LIGHT_COUNT 3
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cbuffer ExternalData : register(b0)
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{
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float3 cameraPosition;
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float roughness;
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float3 ambient;
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float3 tint;
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Light lights[LIGHT_COUNT];
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}
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float calculateSpecular(float3 normal, float3 direction, float3 worldPosition, float3 cameraPosition, float roughness)
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{
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return getSpecular(
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getView(cameraPosition, worldPosition),
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getReflection(direction, normal),
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getSpecularExponent(roughness, MAX_SPECULAR_EXPONENT)
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);
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}
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float3 calculateDirectionalLight(Light light, float3 normal, float3 worldPosition, float3 cameraPosition, float roughness, float3 surfaceColor)
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{
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float3 lightDirection = normalize(light.Direction);
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float diffuse = getDiffuse(normal, -lightDirection);
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float specular = calculateSpecular(normal, lightDirection, worldPosition, cameraPosition, roughness);
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return (diffuse * surfaceColor + specular) * light.Intensity * light.Color;
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}
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float4 main(VertexToPixel input) : SV_TARGET
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{
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input.normal = normalize(input.normal);
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float3 light = ambient * tint;
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for (int i = 0; i < LIGHT_COUNT; i++)
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{
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switch (lights[i].Type)
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{
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case LIGHT_TYPE_DIRECTIONAL:
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light += calculateDirectionalLight(lights[i], input.normal, input.worldPosition, cameraPosition, roughness, tint);
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break;
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}
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}
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return float4(light, 1);
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}
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