image/texture inversion-negative

Blitz3D Forums/Blitz3D Programming/image/texture inversion-negative

Mr Snidesmin (Posted 2008) [#1]

Is there a fast (hardware) method to do this? I.e. a subtractive blend rather than additive blend. For such a simple operation you'd think you could do it on the GPU. Anyone know if it's possible to do this in b3d?

Beaker (Posted 2008) [#2]

You would have to code it yourself for standard Blitz3D (ie. a bit slow). You could always use a DLL (FastImage, FastExt or other?).

Ross C (Posted 2008) [#3]

As beaker suggests, try the fastextend lib. It includes many more blend modes than standard blitz3d. It may have what you need. Try posting in the userlib section of the blitz3d forum, referencing fastextend lib. The author is usually around.

Mr Snidesmin (Posted 2008) [#4]

Thanks both - i'll check out those libs