How to get the height of a gameobject at a given point ?

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Hi, I have a big gameObject which act as a big map.

I want to create an invisible TileMap for this object but I can't find a way to get the y coordinates at a random x and z coordinates.

I already know the function Terrain.SampleHeight(). Is there an equivalent for other gameObjects?

Thanks in advance.

Answer 1

Answer by Xarbrough · Apr 16, 2017 at 12:03 AM

Assuming "big gameObject" means a MeshRenderer and Mesh component, then you could use the Renderer.bounds property to get the bounding volume of a renderer object. You could also loop through Mesh.vertices, convert them to world space with Transform.TransformPoint and pick the highest y-value.

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Paxlord · Apr 16, 2017 at 06:51 PM 0

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With these solutions, I can only get the maximum height of the game Object.

Here, I want to be able to give a X and a Z coordinates and get the height of the surface at this point.

I joined an image of my problem. How can I make all the red points return y=1, all the black ones return y=2 and all the blue ones return y=3?

Thanks.

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image-explanation.png (245.4 kB)

Xarbrough Paxlord · Apr 16, 2017 at 08:42 PM 0

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If for any convenient reason you already have a meshcollider on your object you can raycast straight down onto the surface and measure the distance from a fixed high point. You can also loop through all vertices and find vertices close to the x and z coordinate, then pick one or average multiple to find a y-value that gives you the height of the object at that position in space.

How to get the height of a gameobject at a given point ?

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