Set Vertices to Ground

Questions & Answers
1

I’m trying to set all the vertices of plane to match the height of the terrain. At the moment, it sets about half the plane to some random Y value and ignores the other half. I can’t seem to figure out what’s going wrong here.

So far this is what I have:

using UnityEngine;
using UnityEditor;
using System.Collections;

public class GroundVertices : MonoBehaviour
{
	
	[MenuItem("Tools/Ground Vertices")]
	static void Init()
	{
		Mesh m = (Mesh)((MeshFilter)Selection.activeTransform.gameObject.GetComponent(typeof(MeshFilter))).sharedMesh;
		Vector3[] verts = m.vertices;
		
		for(int i = 0; i < verts.Length; i++)
    	{    			
    		verts <em>= new Vector3(verts<em>.x, verts_.y + 100f, verts*.z);*_</em></em>

* RaycastHit ground = new RaycastHit();*
_ if(Physics.Raycast(verts*, Vector3.down, out ground))
{*_

* Debug.Log(ground.point.y + ground.transform.tag);*
_ verts*.y = ground.point.y;
}
} *_

* m.vertices = verts;*
* m.RecalculateNormals();*
* }*
}

2

Turns out that the issue with half the verts flattening themselves was a red herring. The issue was that I was modifying local points, not world coordinates. Here is my solution:

using UnityEngine;
using UnityEditor;
using System.Collections;

public class GroundVertices : MonoBehaviour
{
	
	[MenuItem("Tools/Ground Vertices")]
	static void Init()
	{
		GameObject go = Selection.activeTransform.gameObject;
		Mesh m = (Mesh)((MeshFilter)go.GetComponent(typeof(MeshFilter))).sharedMesh;
		Vector3[] verts = m.vertices;
		int layerMask = 1<<10;
		for(int i = 0; i < verts.Length; i++)
    	{    			
    		Vector3 castFrom = go.transform.TransformPoint(verts*);		*

  •  	RaycastHit ground = new RaycastHit();*

  •      if(Physics.Raycast(castFrom, -Vector3.up, out ground, Mathf.Infinity,layerMask))*

  •      {*

_ verts = go.transform.InverseTransformPoint(ground.point);_
* }*
* } *

* m.vertices = verts;*
* m.RecalculateBounds();*
* m.RecalculateNormals();*
* m.Optimize();*
* }*
}