void Skybox::BuildProceduralSky (IVector rSunlightVector, TimeOfDay* rpTimeOfDay)
{
// Procedurally build an image for each of the 6 faces of the skybox
IImage* pImageU = new IImage ();
IImage* pImageD = new IImage ();
IImage* pImageL = new IImage ();
IImage* pImageR = new IImage ();
IImage* pImageF = new IImage ();
IImage* pImageB = new IImage ();
unsigned const int Width = 64;
unsigned const int Height = 64;
unsigned const int BitsPerPixel = 3;
unsigned const int ImageSize = Width * Height * 3;
// For now, ignore the sun;
// later on, we'll calculate the sky's color based on the sun's position
unsigned char BitmapU[ImageSize];
unsigned char BitmapD[ImageSize];
unsigned char BitmapL[ImageSize];
unsigned char BitmapR[ImageSize];
unsigned char BitmapF[ImageSize];
unsigned char BitmapB[ImageSize];
Color TopOfSkyColor = GetTopOfSkyColor (rpTimeOfDay);
// Don't generate a new color if we already have one
if (mTopOfSkyColor.mR == TopOfSkyColor.mR
&& mTopOfSkyColor.mG == TopOfSkyColor.mG
&& mTopOfSkyColor.mB == TopOfSkyColor.mB)
return;
mTopOfSkyColor = TopOfSkyColor;
Color BottomOfSkyColor = GetBottomOfSkyColor (rpTimeOfDay);
// Hand the work off to helper functions, which color the bitmaps
GenerateUpBitmap (BitmapU, ImageSize, TopOfSkyColor);
GenerateDownBitmap (BitmapD, ImageSize, BottomOfSkyColor);
GenerateSideBitmap (BitmapL, ImageSize, Height, BottomOfSkyColor,
TopOfSkyColor);
GenerateSideBitmap (BitmapR, ImageSize, Height, BottomOfSkyColor,
TopOfSkyColor);
GenerateSideBitmap (BitmapF, ImageSize, Height, BottomOfSkyColor,
TopOfSkyColor);
GenerateSideBitmap (BitmapB, ImageSize, Height, BottomOfSkyColor,
TopOfSkyColor);
// Copy our bitmap data into into an engine-readable format
pImageU->SetData (BitmapU, Width, Height);
pImageD->SetData (BitmapD, Width, Height);
pImageL->SetData (BitmapL, Width, Height);
pImageR->SetData (BitmapR, Width, Height);
pImageF->SetData (BitmapF, Width, Height);
pImageB->SetData (BitmapB, Width, Height);
// Load the textures into the texture manager
// (delete existing textures if there are any)
if (mTextureU != -1) mpTextureManager->DeleteTexture (mTextureU);
mTextureU = mpTextureManager->LoadIImageFile (pImageU);
if (mTextureD != -1) mpTextureManager->DeleteTexture (mTextureD);
mTextureD = mpTextureManager->LoadIImageFile (pImageD);
if (mTextureL != -1) mpTextureManager->DeleteTexture (mTextureL);
mTextureL = mpTextureManager->LoadIImageFile (pImageL);
if (mTextureR != -1) mpTextureManager->DeleteTexture (mTextureR);
mTextureR = mpTextureManager->LoadIImageFile (pImageR);
if (mTextureF != -1) mpTextureManager->DeleteTexture (mTextureF);
mTextureF = mpTextureManager->LoadIImageFile (pImageF);
if (mTextureB != -1) mpTextureManager->DeleteTexture (mTextureB);
mTextureB = mpTextureManager->LoadIImageFile (pImageB);
delete pImageU;
delete pImageD;
delete pImageL;
delete pImageR;
delete pImageF;
delete pImageB;
}
