particles - UV's?

Graphics Visual Effects
1

is there a way to define UV’s for a particle?
for example, with UV Animation with a Particle Renderer all that is happening are the UV’s are modified each update according to the user settings…

where can we define this through script?

2

I’d actually be interested in this myself. I recently hit upon this when doing up some particle effects, and wanted to have a randomly assigned texture (in an atlas) per particle in the emitter.

I wasn’t able to find anything pertinent in the scripting docs.

edit:
On second thought, this might be accessible via the inherited members. Will take a crack and report.

edit2:
And waddaya know, that worked.

//simplified example, just attach this to an emitter
//and set the x and y UV offset and scale
//as appropriate for your texture atlas

var offsetUV:Vector2;
var scaleUV:Vector2;

function Awake() {
  gameObject.renderer.material.mainTextureOffset = offsetUV;
  gameObject.renderer.material.mainTextureScale = scaleUV;
}
3

good one LoTekk! :slight_smile:

4

Hi, sorry to dig up an old thread but this is also what i wanted to do… however the script above changes the material UV settings. Is it possible to change the UV settings of the billboard particle without affecting the material?

I ask because i have 1 atlas with all my particles on and i wanted to have an effect that’s 1 draw call but have multiple materials to offset the UV’s is creating 3 draw calls per particle effect (i say 3 because it has 1 main and 2 sub particle attached in this case)