Question by shads11858 · Sep 02, 2013 at 01:17 PM · terrain projector grids

Selecting Grid Sqaures from Projector on Terrain

I've been reading on how to put grid squares over a terrain map and managed to get it displayed over my scene but I'm not sure how I can make it so that when the users mouse is over a grid square it changes color and when clicked can then respond by changing that square only to a different terrain design.
Basically a bit like farmville in that you select a grid square which has grass and then click to change to dirt and then grow something. Any ideas?

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$$anonymous$$ · Sep 02, 2013 at 01:24 PM 0

Use colliders and physics raycast. Check the docs for those.

shads11858 · Sep 02, 2013 at 02:43 PM 0

I've looked at those, I get how you'd use raycasts to see if something is in line with your object but not to see if a users mouse is over a grid square placed by a projector, particularly being there is hundreds of squares over the terrain and placing a collider on each individual square might be a but of an overhead.