Advanced Unity: Custom touch input origin

Questions & Answers
1

Hi guys,

In Short: I want to use touch events on a world canvas independent of the viewing camera.

More Details:

- On a Table in the virtual room lies a virtual tablet (WorldSpace Canvas).

- The user can control it through a real tablet. (Kind of working)

- The touch inputs are sent from a tablet to the desktop-pc and piped into the unity input system via a custom touch input module which then controls Unity UI. This works fine.

- Also the touch visualization of the touches on the canvas ( works fine).

The main problem is, that the touches are mapped to the canvas using the main camera as reference system => If the button is being rendered in the corner, I also have to touch in the corner, even if it actually is in the middle of the canvas.

How can I map the touch coordinates directly to the canvas, independent of the camera?

I already tried adding a second camera tracked at the canvas, it works, but as soon as I build my project, the second camera seems to be ignored, wich results, once again, in wrong touch mappings.

Thanks for your help!
I am very curious about your solutions and ideas :slight_smile:

2

Solution:
You can assign a camera to the canvas via canvas.worldcamera. The camera doesnt need to render anything. But it should have its target display set to Display 1.