//----------------------------------------------------------------------------
void Renderer::EnableLighting(const ColorRGB& rAmbient)
{
const GXColor amb = { rAmbient.R()*255, rAmbient.G()*255,
rAmbient.B()*255, 255 };
GXSetChanAmbColor(GX_COLOR0A0, amb);
GXSetVtxAttrFmt(GX_VTXFMT0, GX_VA_CLR0, GX_CLR_RGBA, GX_RGBA8, 0);
}
void SaveBmp(const string &aFileName,const Image<ColorRGB> &aImage)
{
FILE* pFile = fopen(aFileName.c_str(),"wb+");
BitmapFileHeader oFileHeader;
BitmapInfoHeader oInfoHeader;
oInfoHeader.biWidth = aImage.GetWidth();
oInfoHeader.biHeight = aImage.GetHeight();
//We compute stride sizes. A stride must be a factor
//of 4.
int StrideSize = oInfoHeader.biWidth * 3;
if((oInfoHeader.biWidth*3)%4)
{
StrideSize += 4-((oInfoHeader.biWidth*3)%4);
}
//Only 24 bit mot is encoded (1 char per color components)
//other modes require a palette, which would be a big more
//complicated here.
oInfoHeader.biBitCount = 24;
oInfoHeader.biSizeImage = StrideSize * oInfoHeader.biHeight;
//Offset & size. (File header = 14 bytes, File info = 40 bytes)
oFileHeader.bfOffBits = 54;
oFileHeader.bfSize = 54 + sizeof(char) *
StrideSize *
oInfoHeader.biHeight;
unsigned char * pBuffer = new unsigned char[StrideSize];
//Write header information in the bmp file.
oFileHeader.Write(pFile);
oInfoHeader.Write(pFile);
//Write raster data in the bmp file.
//The y axis is inverted in bmp files, this is why we're
//copying lines backward.
for(int i = oInfoHeader.biHeight-1 ;i >=0; --i)
{
for(int j = 0; j < oInfoHeader.biWidth; ++j)
{
ColorRGB PixelColor =
aImage.GetRasterData()[i*oInfoHeader.biWidth + j];
PixelColor.Clamp();
pBuffer[j*3] = unsigned char(PixelColor.B()*255);
pBuffer[j*3+1] = unsigned char(PixelColor.G()*255);
pBuffer[j*3+2] = unsigned char(PixelColor.R()*255);
}
fwrite(pBuffer,StrideSize,1,pFile);
}
delete[] pBuffer;
fclose(pFile);
}
//----------------------------------------------------------------------------
Texture2D* Sample5::CreateTexture()
{
if (mspTexture)
{
return mspTexture;
}
// define the properties of the image to be used as a texture
const UInt width = 256;
const UInt height = 256;
const Image2D::FormatMode format = Image2D::FM_RGB888;
const UInt bpp = Image2D::GetBytesPerPixel(format);
ColorRGB* const pColorDst = WIRE_NEW ColorRGB[width*height];
// create points with random x,y position and color
TArray<Cell> cells;
Random random;
for (UInt i = 0; i < 10; i++)
{
Cell cell;
cell.point.X() = random.GetFloat() * width;
cell.point.Y() = random.GetFloat() * height;
cell.color.R() = random.GetFloat();
cell.color.G() = random.GetFloat();
cell.color.B() = random.GetFloat();
Float max = 0.0F;
max = max < cell.color.R() ? cell.color.R() : max;
max = max < cell.color.G() ? cell.color.G() : max;
max = max < cell.color.B() ? cell.color.B() : max;
max = 1.0F / max;
cell.color *= max;
cells.Append(cell);
}
// iterate over all texels and use the distance to the 2 closest random
// points to calculate the texel's color
Float max = 0;
for (UInt y = 0; y < height; y++)
{
for (UInt x = 0; x < width; x++)
{
Float minDist = MathF::MAX_REAL;
Float min2Dist = MathF::MAX_REAL;
UInt minIndex = 0;
for (UInt i = 0; i < cells.GetQuantity(); i++)
{
Vector2F pos(static_cast<Float>(x), static_cast<Float>(y));
// Handle tiling
Vector2F vec = cells[i].point - pos;
vec.X() = MathF::FAbs(vec.X());
vec.Y() = MathF::FAbs(vec.Y());
vec.X() = vec.X() > width/2 ? width-vec.X() : vec.X();
vec.Y() = vec.Y() > height/2 ? height-vec.Y() : vec.Y();
Float distance = vec.Length();
if (minDist > distance)
{
min2Dist = minDist;
minDist = distance;
minIndex = i;
}
else if (min2Dist > distance)
{
min2Dist = distance;
}
}
Float factor = (min2Dist - minDist) + 3;
ColorRGB color = cells[minIndex].color * factor;
pColorDst[y*width+x] = color;
max = max < color.R() ? color.R() : max;
max = max < color.G() ? color.G() : max;
max = max < color.B() ? color.B() : max;
}
}
// convert and normalize the ColorRGBA float array to an 8-bit per
// channel texture
max = 255.0F / max;
UChar* const pDst = WIRE_NEW UChar[width * height * bpp];
for (UInt i = 0; i < width*height; i++)
{
ColorRGB color = pColorDst[i];
pDst[i*bpp] = static_cast<UChar>(color.R() * max);
pDst[i*bpp+1] = static_cast<UChar>(color.G() * max);
pDst[i*bpp+2] = static_cast<UChar>(color.B() * max);
}
Image2D* pImage = WIRE_NEW Image2D(format, width, height, pDst);
Texture2D* pTexture = WIRE_NEW Texture2D(pImage);
// The texture tiles are supposed to be seamless, therefore
// we need the UV set to be repeating.
pTexture->SetWrapType(0, Texture2D::WT_REPEAT);
pTexture->SetWrapType(1, Texture2D::WT_REPEAT);
// save the texture for later reference
mspTexture = pTexture;
return pTexture;
}
