[slimDX] rotation and scaling sprites

Graphics and GPU Programming Programming

Started by id0001 May 27, 2008 02:47 AM

3 comments, last by Promit 15 years, 10 months ago

122

Author

May 27, 2008 02:47 AM

I am trying to rotate and scale sprites in an slimDX application but I have no clue on how to do it. I tried to use the Sprite.Tranform property but I couldn't figure out how it worked because I have never worked with these transformations before. Can anyone point me in the right direction on how to rotate and scale sprites in slimDX. Thanks, ID

Mike.Popoloski

3,259

May 27, 2008 06:52 AM

Simply create a matrix describing the kind of transformation you want, and then use it to set the sprite's Transform property. If you don't know what matrix transformations are, you probably need to go study 3D math some more before you'll be ready to tackle a 3D API.

Mike Popoloski | Journal | SlimDX

id0001

122

Author

May 28, 2008 12:48 AM

well I know what matrix transformations are but I have never really worked with it.

My rotation problem is this:

I use sprite.Transform = Matrix.RotationZ(3);, but the rotationcenter is in the upperleft corner and I cant figure out how I can change this.

MJP

20,295

May 28, 2008 08:15 AM

Native D3D has a function called D3DXMatrixTransformation2D that allows you to specify scaling and rotation factors with a center point for both. I'm sure there's an equivalent function in SlimDX.

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