procedural-3d-engine/data/shaders/hlsl/pushconstants/lights.frag
Ben Clayton ca884587a4 Move shaders into glsl and hlsl directories
Move `data/shaders` to `data/shaders/glsl`
Move `data/hlsl` to `data/shaders/hlsl`

Fix up shader paths in the cpp files to point to the new glsl location.

`data/shaders/hlsl/compile.py` still overwrites the glsl .spv files (for
now).

Issue: #723
2020-06-01 12:22:28 +01:00

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939 B
GLSL

// Copyright 2020 Google LLC
#define lightCount 6
struct VSOutput
{
[[vk::location(0)]] float3 Normal : NORMAL0;
[[vk::location(2)]] float3 Color : COLOR0;
[[vk::location(3)]] float4 LightVec[lightCount] : TEXCOORD1;
};
#define MAX_LIGHT_DIST 9.0 * 9.0
float4 main(VSOutput input) : SV_TARGET
{
float3 lightColor[lightCount];
lightColor[0] = float3(1.0, 0.0, 0.0);
lightColor[1] = float3(0.0, 1.0, 0.0);
lightColor[2] = float3(0.0, 0.0, 1.0);
lightColor[3] = float3(1.0, 0.0, 1.0);
lightColor[4] = float3(0.0, 1.0, 1.0);
lightColor[5] = float3(1.0, 1.0, 0.0);
float3 diffuse = float3(0.0, 0.0, 0.0);
// Just some very basic attenuation
for (int i = 0; i < lightCount; ++i)
{
float lRadius = MAX_LIGHT_DIST * input.LightVec[i].w;
float dist = min(dot(input.LightVec[i], input.LightVec[i]), lRadius) / lRadius;
float distFactor = 1.0 - dist;
diffuse += lightColor[i] * distFactor;
}
return float4(diffuse, 1);
}