Hello, I want to be able to get access to the colour of a pixel in a texture in order to calculate collision detection, many of the posts i have read on this topic seem to be theory and say little about actual implementation. All I want to know is a single function that will return a value depending on the colour of a pixel at a certain point i.e. GetPixel(x,y). I don''t use an HDC in my game in order to use GetPixel(HDC,x,y). Is there a Direct3D equivalent to this function? or a different gdi function that doesn''t want an HDC? All the best, Hugh

keep a copy of the texture or and on/off bitmask around in normal system memory, and use it to check.. reading stuff from the video card, such as textures, is SLOW

Thanks very much,

That was very useful, i managed to get access to each pixel and find what colour it was, it is slow, but used sparingly, it works fine.

Thanks,

Hugh