static void BuildLightContext(MeshFilter[] meshes, List <Light> lights, BakeContext ctx)
{
int lightCount = lights.Count;
// light data size
const int lightPosSize = 3; // padded with extra float
const int LightDirSize = 3; // padded with extra float
const int lightColorSize = 3; // padded with extra float (don't need alpha)
const int lightRIATSize = 4; // range, intensity, angle, type
int totalLightSize = lightCount * SIZE_FLOAT * (lightPosSize + LightDirSize + lightColorSize + lightRIATSize);
VertexBakerLib instance = VertexBakerLib.Instance;
ctx.m_lightsDataPtr = instance.Alloc(totalLightSize);
ctx.m_lightsOptPtr = instance.Alloc(lightCount * SIZE_LONG);
int lightDestOffset = 0;
float[] riat = new float[4];
long[] data = new long[lightCount];
// light layout
for (int l = 0; l < lightCount; ++l)
{
Light light = lights[l];
riat[0] = light.range;
riat[1] = light.intensity;
riat[2] = light.spotAngle;
riat[3] = (float)light.type;
// position data
IntPtr lightPosPtr = new IntPtr(ctx.m_lightsDataPtr.ToInt64() + lightDestOffset * SIZE_FLOAT);
instance.CopyVector4(lightPosPtr, lightPosSize * SIZE_FLOAT, light.transform.position.ToVector4(1f), lightPosSize * SIZE_FLOAT);
lightDestOffset += lightPosSize;
// direction data
IntPtr lightDirPtr = new IntPtr(ctx.m_lightsDataPtr.ToInt64() + lightDestOffset * SIZE_FLOAT);
instance.CopyVector4(lightDirPtr, LightDirSize * SIZE_FLOAT, light.transform.forward.ToVector4(0f), LightDirSize * SIZE_FLOAT);
lightDestOffset += LightDirSize;
// color data
IntPtr lightColorPtr = new IntPtr(ctx.m_lightsDataPtr.ToInt64() + lightDestOffset * SIZE_FLOAT);
instance.CopyVector4(lightColorPtr, lightColorSize * SIZE_FLOAT, light.color.ToVector4(1f), lightColorSize * SIZE_FLOAT);
lightDestOffset += LightDirSize;
// IRAT data
IntPtr lightIRATPtr = new IntPtr(ctx.m_lightsDataPtr.ToInt64() + lightDestOffset * SIZE_FLOAT);
instance.CopyFloatArray(lightIRATPtr, lightRIATSize * SIZE_FLOAT, riat, lightRIATSize * SIZE_FLOAT);
lightDestOffset += lightRIATSize;
// set lighting options
ulong dataValue = 0;
// 3 bits
dataValue |= (ulong)lights[l].shadows;
// 32 bits max
dataValue |= (ulong)(((long)lights[l].cullingMask) << 3);
data[l] |= (long)dataValue;
}
Marshal.Copy(data, 0, ctx.m_lightsOptPtr, lightCount);
}
