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Transpernecy..

Started by Naveed Ahmed Aug 22, 2000 at 7:02 AM 5 replies 450+ views

Original Post

Aug 22, 2000 at 7:02 AM

I need to show a bitmap, 16m color, and like to implement transperency such that, beside the main picture, remaining area of color black(0,0,0) or white(255,255,255) should not show, I tried blending, but can''t get it work, does anybody has solution.

Blue*Omega

Aug 22, 2000 at 2:24 PM

You should take a look at NeHe''s latest tutorial. It shows you how to load TGA files that support Alpha channels. they should give you the effect your looking for.

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Blue*Omega

(Insert Witty Quote Here)

NeoGL

Aug 22, 2000 at 2:33 PM

You are talking about Masking, that''s what you want to do. Read up Nehe''s Tutorial #20. That is exactly what you are looking for.

Neo

Naveed Ahmed

Aug 22, 2000 at 11:33 PM

Well, I am talking about Color Key, like in DirectDraw, is masking same as color key?

zedzeek

Aug 23, 2000 at 6:11 AM

actually the correct way to do colour masking is with glColorMask(....) not how its done in tut20

Naveed Ahmed

Aug 23, 2000 at 9:04 AM

Masking is not good, if you have 50 types of images, should you generate 50 monochrome images to mask, there should something else to filter just one color like (0,0,0) or (255,255,255).

richardve

Aug 25, 2000 at 12:55 AM

I think this is what you''re searching for...

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