Clipping a Textured Quad in Direct3D9?

harmless · 2007-07-31T09:55:30

Dear Sirs, I am currently working on my 2D sprite class to handle the graphics portion of my GUI engine, and my current setup is as follows: 1. Using Direct3DGraphics, fixed pipeline. 2. Uses vertex buffers and textures to form textured quad to hold 2d image. 3. uses orthogonal camera settings to simulate 2D. My problem now is this: Say a 10x50 pixel sized button is a child control of a dialog box and the dialog box has been resized to the point that only 50% of the button is visible. Therefore i need to clip the image that represents the button. How do i actually do this? Before, i was using iDirect3DSurface9 interface to handle 2D images, and just like back in the days of DirectDraw, clipping was pretty much straight forward. This time i am trying to use textures and direct3d vertices as i believe it's the next step forward. Any thoughts and replies are greatly appreciated. cheers!

Graphics and GPU Programming Programming

Started by harmless July 27, 2007 10:31 AM

11 comments, last by harmless 16 years, 8 months ago

Jerax

126

July 30, 2007 06:39 PM

Have you tried using scissor rectangles? Should work much like viewports but with introducing scaling issues. And scissoring is very fast to boot.

harmless

139

Author

July 31, 2007 09:08 AM

Quote:Original post by Jerax
Have you tried using scissor rectangles? Should work much like viewports but with introducing scaling issues. And scissoring is very fast to boot.

hmmm... first time i've heard of this but i would love to see how it work.
could you care to explain how it works? really appreciate it, thanks.

My UI Engine at Work (Demo as of 11-Sept-2007)

harmless

139

Author

July 31, 2007 09:55 AM

Quote:Original post by harmless
Quote:Original post by Jerax
Have you tried using scissor rectangles? Should work much like viewports but with introducing scaling issues. And scissoring is very fast to boot.

hmmm... first time i've heard of this but i would love to see how it work.
could you care to explain how it works? really appreciate it, thanks.

whoa i just found out it's a direct3d9 method! lemme have a look at it then.
Thanks for letting me know about this feature.

My UI Engine at Work (Demo as of 11-Sept-2007)

Clipping a Textured Quad in Direct3D9?

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