Coord3D OGL3DBase::GetPixelComponents(int nPixels) const
{
double maxMap = sqrt(xOrthoSpan * xOrthoSpan + yOrthoSpan * yOrthoSpan + zOrthoSpan * zOrthoSpan);
// max diag of window
int uVal = plotBase.plotUwidth;
int vVal = plotBase.plotVheight;
double windowDiag = sqrt(double(uVal * uVal) + double(vVal * vVal));
double pixelsPerAxes = maxMap / windowDiag * double(nPixels);
// set output
Coord3D outCoord(pixelsPerAxes);
// adjust for axes scaling distortions
Coord3D minCoord, maxCoord;
GetTransformedLimits(minCoord, maxCoord);
outCoord *= (maxCoord - minCoord);
// adjust for axes length differences
outCoord.cX /= xOrthoSpan;
outCoord.cY /= yOrthoSpan;
outCoord.cZ /= zOrthoSpan;
return outCoord;
}
//Apply this filter
void evaluatePixel()
{
//Calculate block size
float myblockcount = BlockCount/5.0;
float BlockSize = 1.0/myblockcount;
float2 temp = outCoord();
temp.x = temp.x/Width;
temp.y = temp.y/Height;
//Calculate block position and center
float2 blockPos = floor(temp * myblockcount);
float2 blockCenter = blockPos * BlockSize + BlockSize * 0.5;
//Pixel distance from center
float dist = length(temp - blockCenter) * myblockcount;
//If pixel is inside inner circle
//or outside outer circle then color
//it with background color
//otherwise color it with the color
//of the pixel at the center
if(dist < Min || dist > Max)
{
dst = color;
}
else
{
blockCenter.x = blockCenter.x * Width;
blockCenter.y = blockCenter.y * Height;
dst = sampleNearest(src, blockCenter);
}
}
//Apply for each pixel
void evaluatePixel()
{
//Vector from circle center to current pixel
float2 coord_for_this_pixel = outCoord() - center;
//Length of the radius
float cur_radius = length(coord_for_this_pixel);
//Sample pixel and take shift into consideration
float4 frontPixel = sampleNearest(frontImage, outCoord() - shift);
//Background color if pixel is outside the circle
if (cur_radius > radius)
{
dst = color;
}
//Otherwise keep the original color
else
{
dst = frontPixel;
}
}
