2d textures

Archived Forums Questions & Answers
1

how better create and show animated textures and what better to use (avi, gif, maybe UV moving???)? especially if I need several 2d objects with same animated texture and several with another. And I need to move them in runtime (by mouse, after camera move), change theirs textures.

2

You’ll need Unity pro to have movie files textured to objects. You can, however create animated textures with image files (sprite sheets) with a bit of code… along the lines of this:

  var uvAnimationTileX = 2; //Here you can place the number of columns of your sheet. 
                           //The above sheet has 2

var uvAnimationTileY = 1; //Here you can place the number of rows of your sheet. 
                          //The above sheet has 1
var framesPerSecond = 10.0;

function Update ()
{
    // Calculate index
    var index : int = Time.time * framesPerSecond;
	
	// repeat when exhausting all frames
    index = index % (uvAnimationTileX * uvAnimationTileY);
    
    // Size of every tile
    var size = Vector2 (1.0 / uvAnimationTileX, 1.0 / uvAnimationTileY);
    
    // split into horizontal and vertical index
    var uIndex = index % uvAnimationTileX;
    var vIndex = index / uvAnimationTileX;

    // build offset
    // v coordinate is the bottom of the image in opengl so we need to invert.
    var offset = Vector2 (uIndex * size.x, 1.0 - size.y - vIndex * size.y);
    
    renderer.material.SetTextureOffset ("_MainTex", offset);
    renderer.material.SetTextureScale ("_MainTex", size);
}

I grabbed that script from the Unity forums somewhere and worked for me :slight_smile: