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[slimDX] rotation and scaling sprites

Started by id0001 May 27, 2008 at 2:47 AM 3 replies 2.9k views

Original Post

May 27, 2008 at 2:47 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

May 27, 2008 at 6:52 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.

id0001

May 28, 2008 at 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

May 28, 2008 at 8:15 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.

Promit

May 28, 2008 at 9:52 AM

There sure is: Matrix.Transformation2D.

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