rotate texture?

Unity Engine
1

Hi,

is it possible? I found in the forum that you can reflect a texture by using

renderer.material.maiTextureScale.x =-1;

but I would like to rotate a texture at 90 degrees.
I could create separate instances of the texture outside of unity rotated at 90, 180, 270 and use that but I would like to know if I am not missing some simple way of rotating a texture inside unity.

thanks

2

since nobody replied I would assume it’s not possible. It’s not a big deal anyway. I already implemented a solution that works in my case.
thanks.

3

Yes, this can be done by creating a custom matrix. You would have to create your own shader and script for it to work though. Something like this:

Javascript to place onto the GameObject:

var offset : Vector2;
var tiling : Vector2;
var rot = 45.0;

function Update ()
{
	var matrix = Matrix4x4.TRS (offset, Quaternion.Euler (0, 0, rot), tiling);
	renderer.material.SetMatrix ("_Matrix", matrix);
}

And the shader:

Shader "Test" {
	Properties {
		_MainTex ("Base (RGB)", 2D) = "white"
	}
	SubShader {
		Pass {
			SetTexture [_MainTex] {
				Matrix [_Matrix]
			}
		}
	}
}
4

Daniel is correct in that rotation of a texture would probably be done by a shader. The Animation API example project actually has an example of this and a shader you could probably modify to get the desired result.

5

Thank you very much guys for the replies. I will keep this mind.

1 Like
6

Digging up an old post I know, but I am trying the same sort of thing (rotating a material) and looked up the Animation API. It’s doing a similar thing to what I was trying to do in a custom shader, but unfortunately also has the same results of the material being rotated from the bottom left corner of a plane/face of cube. I need to rotate the material from the centre of the plane/cube face. Anyone know how I can do this, either a modification of above or altering a pivot point somehow?

7

I made a small tutorial on rotating textures:
http://themaxscriptguy.wordpress.com/2014/11/20/rotating-cubemap-in-unity/https://github.com/theMaxscriptGuy/Unity_Dev/tree/master/CubeMap_Rotation

8

Here’s a C# modification of the code above that will rotate the texture around the center:

public class CirclePictureAnimate : MonoBehaviour {
   float rotation = 0;
   float scale = 10;
   Vector3 offset = new Vector3(0.5f,0.5f,0);
   Vector3 tiling = new Vector3(1,1,1);
   Material animMat;

   // Use this for initialization
   void Start () {
     animMat = gameObject.renderer.materials[1];
     //Debug.Log ("Material used: "+animMat.name);
   }

   void Update () {
     rotation += Time.deltaTime*scale;


     Quaternion quat = Quaternion.Euler(0,0,rotation);
     Matrix4x4 matrix1 = Matrix4x4.TRS (offset, Quaternion.identity, tiling);
     Matrix4x4 matrix2 = Matrix4x4.TRS (Vector3.zero, quat, tiling);
     Matrix4x4 matrix3 = Matrix4x4.TRS (-offset, Quaternion.identity, tiling);
     animMat.SetMatrix ("_Matrix",matrix1*matrix2*matrix3);
   }
}
9

I needed to rotate a windblown sand texture. I just copied it to Pain.Net, rotated the image 90dg and then brought it back to Unity. Works like a charm.

2 Likes
10

This works like a charm! Thanks, bud!