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Posted: Mon Mar 08, 2004 6:02 pm
by soconne
Well what about having transparency on a 3d triangle? I'm having a problem trying to load a texturemap and have an alpha component at the same time. I tried what was stated above, loading a 32-bit tga file from photoshop, but the alpha channel wasn't loaded. I'm trying to blend a 3d triangle based on the alpha value in the texture map, but can't seem to get the alpha component to work. Is there a built in function in Irrlicht that lets you 'add' the alpha channel to an existing texture image once its been loaded??
Posted: Tue Mar 09, 2004 4:28 am
by rt
soconne wrote:Well what about having transparency on a 3d triangle? I'm having a problem trying to load a texturemap and have an alpha component at the same time. I tried what was stated above, loading a 32-bit tga file from photoshop, but the alpha channel wasn't loaded. I'm trying to blend a 3d triangle based on the alpha value in the texture map, but can't seem to get the alpha component to work. Is there a built in function in Irrlicht that lets you 'add' the alpha channel to an existing texture image once its been loaded??
once the texture is loaded you can get a pointer to the image data via
Code: Select all
DWORD* pPixel = (DWORD*)image->lock(); // Get the pointer to the surface
the pixel is 32bits, 0xAARRGGBB so you can strip off the alpha like so
check out the texture manipulation code in the avi reader thread
http://irrlicht.sourceforge.net/phpBB2/ ... .php?t=927, but make sure you have enabled alpha correctly by applying the fixed found in this thread
http://irrlicht.sourceforge.net/phpBB2/ ... .php?t=517
Posted: Tue Mar 09, 2004 12:15 pm
by Dark_Exodus
Thanks for the help guys, i finally got that working.
