LPD3DXSPRITE scaling problem =(

Are the dimensions of your image powers of 2? (32,64,128,etc)

Stay Casual,

Ken
Drunken Hyena

Nope, the image sizes range between 640x480, 640x100, 420x80, etc... Are you suggesting that perhaps if the image dimensions are in powers of two (e.g. 256x256, 512x256, etc...) that the scaling would work properly? At the moment I can get them all to scale into their proper proportions if I multiply the width by 0.625 (this number is consistant with all the images, regardless of width) and then another number representing the Y or height (this number is never consistant)

*bump*

I''ve seen this problem discussed before, but the answer escapes me at the moment. Try a quick search here in the DirectX Forum. I know the answer is in there, I just can''t remember it.

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kevin@mayday-anime.com
http://games.mayday-anime.com

Yep, they have to be powers of two, but they don''t have to be square. You can have 128x32 etc.

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Ya I heard that they have to be powers of two but in all the time I''ve been doing 3D stuff (usually with prebuilt engines) it has never mattered what size the textures were, and I''ve been doing it like this on lots of video cards so I never really gave it a second thought

If you use D3DX to load your textures it will resize them to a power of 2, that''s why your textures are getting munged.

The hardware needs them in powers of 2. There are a lot of ways to work around it though. One is to load them the way you are, and adjust the scaling factors when you draw.

Or you can resize your base image so the extra bits aren''t used and use the Source Rect in D3DXSprite to draw just what you want.

You can combine multiple sprites onto a larger (power of 2) texture page, so there''s no loss of space.

Stay Casual,

Ken
Drunken Hyena

ahh thank you, that clears it all up for me =) Now I know what to do to fix it

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