Get exact terrain height

Question

I need to place a small rectangle on the terrain at runtime (cursor in a grid-based game). The terrain has hills n whatnot, so I need to know the height of the terrain at all four corners of the rectangle, otherwise its mesh gets hidden under the terrain.

I tried using Terrain.SampleHeight() to do this, but it's very inaccurate and about half of the time, the reported height is lower then the actual terrain height. Do I need to raycast or is there a simpler way?

Answer 1

Answer by fred_gds · Aug 31, 2013 at 01:17 PM

Well why don't you raycast all 4 corners?

http://docs.unity3d.com/Documentation/ScriptReference/Physics.Raycast.html

Then you get the exact point where the raycast hits the collider (RaycastHit.point.y I think)

http://docs.unity3d.com/Documentation/ScriptReference/RaycastHit.html

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Mops · Aug 31, 2013 at 02:52 PM 0

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That's what I suggested in my question as well. Still wondering if there's a better approach to this. Will probably use a projector.

Get exact terrain height

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