public void SampleCubeMap(float3 _View, CubeMapSampler _Sampler, out byte _R, out byte _G, out byte _B)
{
AbsView.Set(Math.Abs(_View.x), Math.Abs(_View.y), Math.Abs(_View.z));
float MaxComponent = Math.Max(Math.Max(AbsView.x, AbsView.y), AbsView.z);
fXYZ.Set(_View.x / MaxComponent, _View.y / MaxComponent, _View.z / MaxComponent);
int FaceIndex = 0;
if (Math.Abs(fXYZ.x) > 1.0 - 1e-6)
{ // +X or -X
if (_View.x > 0.0)
{
FaceIndex = 0;
fXY.Set(-fXYZ.z, fXYZ.y);
}
else
{
FaceIndex = 1;
fXY.Set(fXYZ.z, fXYZ.y);
}
}
else if (Math.Abs(fXYZ.y) > 1.0 - 1e-6)
{ // +Y or -Y
if (_View.y > 0.0)
{
FaceIndex = 2;
fXY.Set(fXYZ.x, -fXYZ.z);
}
else
{
FaceIndex = 3;
fXY.Set(fXYZ.x, fXYZ.z);
}
}
else // if ( Math.Abs( fXYZ.z ) > 1.0-1e-6 )
{ // +Z or -Z
if (_View.z > 0.0)
{
FaceIndex = 4;
fXY.Set(fXYZ.x, fXYZ.y);
}
else
{
FaceIndex = 5;
fXY.Set(-fXYZ.x, fXYZ.y);
}
}
fXY.y = -fXY.y;
int X = (int)(Probe.CUBE_MAP_SIZE * 0.5 * (1.0 + fXY.x));
int Y = (int)(Probe.CUBE_MAP_SIZE * 0.5 * (1.0 + fXY.y));
// if ( X < 0 || X > Probe.CUBE_MAP_SIZE-1 )
// throw new Exception();
// if ( Y < 0 || Y > Probe.CUBE_MAP_SIZE-1 )
// throw new Exception();
X = Math.Min(Probe.CUBE_MAP_SIZE - 1, X);
Y = Math.Min(Probe.CUBE_MAP_SIZE - 1, Y);
Probe.Pixel[,] CubeMapFace = m_Probe.m_CubeMap[FaceIndex];
_Sampler(CubeMapFace[X, Y], out _R, out _G, out _B);
}
public void SampleCubeMap( WMath.Vector _View, CubeMapSampler _Sampler, out byte _R, out byte _G, out byte _B )
{
AbsView.Set( Math.Abs( _View.x ), Math.Abs( _View.y ), Math.Abs( _View.z ) );
float MaxComponent = Math.Max( Math.Max( AbsView.x, AbsView.y ), AbsView.z );
fXYZ.Set( _View.x / MaxComponent, _View.y / MaxComponent, _View.z / MaxComponent );
int FaceIndex = 0;
if ( Math.Abs( fXYZ.x ) > 1.0-1e-6 )
{ // +X or -X
if ( _View.x > 0.0 )
{
FaceIndex = 0;
fXY.Set( -fXYZ.z, fXYZ.y );
}
else
{
FaceIndex = 1;
fXY.Set( fXYZ.z, fXYZ.y );
}
}
else if ( Math.Abs( fXYZ.y ) > 1.0-1e-6 )
{ // +Y or -Y
if ( _View.y > 0.0 )
{
FaceIndex = 2;
fXY.Set( fXYZ.x, -fXYZ.z );
}
else
{
FaceIndex = 3;
fXY.Set( fXYZ.x, fXYZ.z );
}
}
else // if ( Math.Abs( fXYZ.z ) > 1.0-1e-6 )
{ // +Z or -Z
if ( _View.z > 0.0 )
{
FaceIndex = 4;
fXY.Set( fXYZ.x, fXYZ.y );
}
else
{
FaceIndex = 5;
fXY.Set( -fXYZ.x, fXYZ.y );
}
}
fXY.y = -fXY.y;
int X = (int) (Probe.CUBE_MAP_SIZE * 0.5 * (1.0 + fXY.x));
int Y = (int) (Probe.CUBE_MAP_SIZE * 0.5 * (1.0 + fXY.y));
// if ( X < 0 || X > Probe.CUBE_MAP_SIZE-1 )
// throw new Exception();
// if ( Y < 0 || Y > Probe.CUBE_MAP_SIZE-1 )
// throw new Exception();
X = Math.Min( Probe.CUBE_MAP_SIZE-1, X );
Y = Math.Min( Probe.CUBE_MAP_SIZE-1, Y );
Probe.Pixel[,] CubeMapFace = m_Probe.m_CubeMap[FaceIndex];
_Sampler( CubeMapFace[X,Y], out _R, out _G, out _B );
}
public unsafe void UpdateBitmap()
{
if (m_Bitmap == null)
{
return;
}
int W = m_Bitmap.Width;
int H = m_Bitmap.Height;
using (Graphics G = Graphics.FromImage(m_Bitmap))
{
G.FillRectangle(Brushes.White, 0, 0, W, H);
}
// Fill pixel per pixel
if (m_Probe != null && m_Probe.m_CubeMap != null)
{
BitmapData LockedBitmap = m_Bitmap.LockBits(new Rectangle(0, 0, W, H), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
CubeMapSampler S = CubeMapSamplerAlbedo;
switch (m_Viz)
{
case VIZ_TYPE.ALBEDO: S = CubeMapSamplerAlbedo; break;
case VIZ_TYPE.DISTANCE: S = CubeMapSamplerDistance; break;
case VIZ_TYPE.NORMAL: S = CubeMapSamplerNormal; break;
case VIZ_TYPE.STATIC_LIT: S = CubeMapSamplerStaticLit; break;
case VIZ_TYPE.FACE_INDEX: S = CubeMapSamplerFaceIndex; break;
case VIZ_TYPE.EMISSIVE_MAT_ID: S = CubeMapSamplerEmissiveMatID; break;
case VIZ_TYPE.NEIGHBOR_PROBE_ID: S = CubeMapSamplerNeighborProbeID; break;
case VIZ_TYPE.SET_INDEX: S = CubeMapSamplerSetIndex; break;
case VIZ_TYPE.SET_ALBEDO: S = CubeMapSamplerSetAlbedo; break;
case VIZ_TYPE.SET_DISTANCE: S = CubeMapSamplerSetDistance; break;
case VIZ_TYPE.SET_NORMAL: S = CubeMapSamplerSetNormal; break;
case VIZ_TYPE.SET_SAMPLES: S = CubeMapSamplerSetSamples; break;
case VIZ_TYPE.SH: S = CubeMapSamplerSH; break;
}
float3 View;
byte R, G, B, A = 0xFF;
for (int Y = 0; Y < H; Y++)
{
float y = 1.0f - 2.0f * (0.5f + Y) / H;
byte *pScanline = (byte *)LockedBitmap.Scan0.ToPointer() + LockedBitmap.Stride * Y;
for (int X = 0; X < W; X++)
{
float x = 2.0f * (0.5f + X) / W - 1.0f;
View = x * m_Right + y * m_Up + m_At;
View = View.Normalized;
SampleCubeMap(View, S, out R, out G, out B);
*pScanline++ = B;
*pScanline++ = G;
*pScanline++ = R;
*pScanline++ = A;
}
}
m_Bitmap.UnlockBits(LockedBitmap);
}
Invalidate();
}
