/// <summary>
/// 球面調和関数を用いて圧縮する(RGBのみ)
/// </summary>
/// <param name="coef_list"></param>
/// <param name="pCube"></param>
public Vector3[] CompressRGB(SHCalcData pCube)
{
// SH計算
ComputeSHTable();
// 立体角計算
ComputeDeltaFormFactor();
// イメージデータを圧縮
Vector3[] coefList = new Vector3[s_SHCoefNum[m_shBandNum]];
for (int l = 0; l < s_SHCoefNum[m_shBandNum]; ++l)
{
double r = 0.0;
double g = 0.0;
double b = 0.0;
for (uint f = 0; f < (int)CubeMapFace.Max; ++f)
{
Color3[] face_color = pCube.GetCubeColorData(f);
for (uint p = 0; p < m_cubeMapSize * m_cubeMapSize; ++p)
{
double value = ((double)m_pDeltaFormFactorTable[f, p] * (double)m_pCubeSHTable[f, p, l]);
r += (double)(face_color[p].Red * value);
g += (double)(face_color[p].Green * value);
b += (double)(face_color[p].Blue * value);
}
}
coefList[l].X = (float)(r);
coefList[l].Y = (float)(g);
coefList[l].Z = (float)(b);
}
return(coefList);
}
/// <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>
/// 球面調和関数を用いて圧縮する(Rのみ)
/// </summary>
/// <param name="coef_list"></param>
/// <param name="pCube"></param>
public void CompressR(float[] coef_list, SHCalcData pCube)
{
// SH計算
ComputeSHTable();
// 立体角計算
ComputeDeltaFormFactor();
// イメージデータを圧縮
for (int l = 0; l < s_SHCoefNum[m_shBandNum]; ++l)
{
double r = 0.0;
for (uint f = 0; f < (int)CubeMapFace.Max; ++f)
{
Color3[] face_color = pCube.GetCubeColorData(f);
for (uint p = 0; p < m_cubeMapSize * m_cubeMapSize; ++p)
{
double value = ((double)m_pDeltaFormFactorTable[f, p] * (double)m_pCubeSHTable[f, p, l]);
r += ((double)face_color[p].Red * value);
}
}
coef_list[l] = (float)(r);
}
}
