37 lines
939 B
GLSL
37 lines
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);
|
||
|
|
}
|