Graphics.DrawTexture Rotation

I'm dynamically drawing textures onto a rendertexture but I need to perform a rotation when drawing.

I've been scouring the forums to understand this but no luck yet.

Here's a bit of code that I use to draw on my rendertexture. My problem is that I can't figure out a way yet to draw at varying angles. I'd like to draw with a rotation of x degrees around the center of the texture.

Code (csharp):

1. RenderTexture.active = myRenderTexture;
2.        
3. #if UNITY_EDITOR
4. myRenderTexture.DiscardContents();
5. #endif
6.        
7. GL.PushMatrix();
8. GL.LoadPixelMatrix(0, textureSize.x, textureSize.y, 0);
9.  
10. // HOW TO ROTATE AS NEEDED
11.  
12. Graphics.DrawTexture(screenRect, myTexture, myMaterial);
13.  
14. GL.PopMatrix ();           
15.        
16. RenderTexture.active = null;

I've played with modifying the shader to see if I can perform rotations in the vertex shader with no luck. I'm wondering if I can apply the rotation in GL, but I'm very GL challenged (and shader challenged for that matter).

Any suggestions? TIA.

 

Have you tried something like this?

Code (csharp):

1.  
2. private Vector2 pivotPoint;
3. private float fRot = 0.0f;
4. ...
5. Matrix4x4 origMatrix = GUI.matrix;
6. pivotPoint = new Vector2( position.width / 2, position.height / 2 );
7. //GUIUtility.ScaleAroundPivot( scale, pivotPoint );
8. GUIUtility.RotateAroundPivot( fRot, pivotPoint );
9.        
10. if (GUI.Button(new Rect(position.width / 2 - 20, position.height / 2 - 20, 50, 50), "Big!"))
11. {
12.     //scale += new Vector2(0.5F, 0.5F);
13.     fRot += 22.5f;
14. }
15.        
16. GUI.matrix = origMatrix;
17.  

 

Thanks IzzySoft. I tried a few different calls using RotateAroundPivot without any luck; I assume the matrix only affects GUI operations and not the Graphics operations.

Wondering if there is a more preferred method for quickly performing dynamic modifications to rendertextures.

 

I dont know. Me <== n00b.

Anyways... if it says RenderTexture.. i Run away.
NO MOOLA to Spare!

 

I hear ya, thanks IzzySoft.

*bump*

Anyone got suggestions on how to do this?