TrailRenderer on GUITexture?

Unity Engine
1

Hey Guys,

for some reasons we are using GUITextures for visible cursors in our MultiTouch project. I would like to add a trail function to this cursors (think about moving your mouse around the screen and leaving a decent trail behind). While the built-in trail renderer works sweetly for GO, i did not found a simple method to assign a trail to/with a GUITexture. Parenting a GO to the texture prefab won’t work (different screencoords). Any idea how/what could i do?

TIA,

Sandor

2

The trail renderer uses 3D space and GUITextures use viewport space, so that won’t really work. I’d recommend using a small plane in 3D space for the cursor instead of a GUITexture.

–Eric

3

thanks Eric,

i was allmost sure that i will get this response :wink: Well, i was thinking about doing that, since the GUItexture thingie is really limiting some possibilities (animations etc. on cursors)… But i am not sure what problems i will facing by using a 3d GO for cursor stuff. The convenience of the GUITextures is that they are allways staying on top of your scene and facing the camera. If i am gong with the 3d-space i will have to take care in every single composition about the “depth” placement of the cursor. I was hoping to find another way maybe by translating the World coordinates of the trail renderer to screen-coordinates and restricting the “movement” of the trail rendere to 2d space…

Thanks anyhow!

Cheers,

4

GUITextures are really 3D objects as well, actually (everything in Unity is). It’s quite simple to make an object always face the camera with a small script (see the wiki), and there are various techniques to make them always on top (a camera that just renders the cursor, shaders, etc.).

–Eric

5

Hi Sandor -

I’m trying to do the same thing using TouchScript, and also trying to log position/velocity of the touches. Have you had any luck with the GUI method?

Thanks,
Dave