/// <summary>
/// キューブマップからSH係数を取得
/// </summary>
static public Vector4[] GetSphericalHarmonics(Texture cubemap, uint band)
{
SHCalcData shData = new SHCalcData(cubemap);
SHHelper shHelper = new SHHelper(band, shData.MapSize);
Vector3[] shCoef = shHelper.CompressRGB(shData);
int coefNum = s_SHCoefNum[band];
Vector4[] shScalingCoef = new Vector4[coefNum];
for (uint i = 0; i < coefNum; i++)
{
SHHelper.GetSphericalHarmonics(out shScalingCoef[i], ref shCoef[i], i);
}
return(shScalingCoef);
}
/// <summary>
///
/// </summary>
public void Capture(GraphicsContext context, Action renderFunc, uint shBand = 0)
{
// レンダリング
CubemapHelper.RenderingCubeMap(context, cubeMap_, depth_, Position, renderFunc);
// PMREM
if (radianceMap_ != null)
{
CubemapHelper.PrefilterRadiance(radianceMap_, cubeMap_);
}
// SH計算
if (shBand > 0)
{
SHCoef = SHHelper.GetSphericalHarmonics(cubeMap_, shBand);
}
}