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| Any way to make a transparent white primitive? |
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Engired
Member #23,752
April 2023
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I was trying to do a simple fade in fade out sort of thing with primitives, but it looks like al_map_rgba_f(1.0, 1.0, 1.0, 0.5 (as an example)) won't blend properly. I assume there's a better blending option that would make it work, but I'm a bit concerned that it'll make the transparent parts of my bitmaps not blend properly either. Fading with black works, so I can always just do that, but I'd love it if there is a way to do it with white. (allegro 5 by the way) |
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gillius
Member #119
April 2000
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It's been awhile since I used Allegro, but my guess is it's an issue with the blending mode. https://www.allegro.cc/manual/5/al_set_blender It seems like you want a weighted average of the source and destination color, which starts at alpha 0 (no effect) to 1.0 (full white). In that case I think you'd want this: Gillius |
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Engired
Member #23,752
April 2023
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Works exactly as I wanted it to. Thanks for the help! |
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