whats 'w' in uvw?
Blitz3D Forums/Blitz3D Programming/whats 'w' in uvw?
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| just for knowledge: what is the w param in UVW texture coordinates, and why is writepixel(fast) not working with alpha even in 32 bit modus? |
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| Writepixelfast not working with alpha? I think it's working. You have to handle it, of course. Not sure if you ca ReadPixel the alpha channel correctly. Writing works. a=127 r=$44 g=$55 b=$66 argb=(a shl 24) or (r shl 16) or (g shl 8) or b writepixelfast x,y,argb when reading a pixel you should mask the slpha channel if it's not an alpha texture: rgb=readpixelfast(x,y) and $ffffff otherwise there may be random values in the alpha channel. Not sure if you can read the alpha channel, maybe like this: argb=readpixelfast(x,y) a=(argb shr 24) And the second thing, the W would be a 3rd dimension to define the vertex location. Imagine you could use the xyz right as UVW. These requires of course a 3D texture or material. Not supported by Blitz and by most other realtime rendering things AFAIK. |
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| ok, thx. just wanted to know :P |
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