Bake transforms into Mesh

[anon99007248]

I need to take all the transforms applied to a GameObject and apply them to the actual mesh object it contains. I thought I could just use TransformPoint, but it doesn’t seem to do what it’s suppose to do. It returns the same vector as it’s given, not the transformed world coord vector. Am I misunderstanding TransformPoint’s purpose?

for (int i = 0; i < MainObject.sharedMesh.vertices.Length;i++)
    MainObject.sharedMesh.vertices _= MainObject.transform.TransformPoint(MainObject.sharedMesh.vertices*);*_

How would I “bake” the transforms into the GameObject’s Mesh?
Edit:
(complete source code)
using UnityEngine;
using System.Collections;

public class Test : MonoBehaviour {
* void Awake () {*
//Create Test object with transforms
Mesh m = new Mesh();
m.vertices = new Vector3[] {new Vector3(1,1,1),new Vector3(2,2,2),new Vector3(3,1,1)};
m.uv = new Vector2[] { new Vector2(0, 0), new Vector2(1, 1), new Vector2(0, 1) };
m.triangles = new int[] {0,1,2};
m.RecalculateNormals();
GameObject go = new GameObject(“TEST OBJECT”);
MeshFilter mf = go.AddComponent();
mf.sharedMesh = m;
MeshRenderer mr = go.AddComponent();
mr.sharedMaterials = new Material[] { new Material(Shader.Find(“Diffuse”)) };
go.transform.Rotate(90, 0, 0);
go.transform.localScale = new Vector3(2, 2, 2);

//Create baked object from test object
GameObject goBaked = new GameObject(“Baked OBJECT”);
MeshFilter mfBaked = goBaked.AddComponent();
MeshRenderer mrBaked = goBaked.AddComponent();
Mesh mBaked = (Mesh)Instantiate(m);
mrBaked.sharedMaterials = mr.sharedMaterials;
mfBaked.sharedMesh = mBaked;
for (int i = 0; i < m.vertexCount; i++)
{
Debug.Log(“Before:” + m.vertices*);*
mBaked.vertices = go.transform.TransformPoint(m.vertices*);*
Debug.Log(“After:” + m.vertices*);*
}
* }*
}

[anon32406522]

TransformPoint takes a point in local space and converts it to world space based on the used transform’s position, rotation, and scale. I’d only expect it to return the same point as was passed in if the transform was the identity, meaning the position is at (0,0,0) and there is no rotation or scale.

Given that, if MainObject.transform is not the identity and MainObject.sharedMesh.vertices is returning vertices in local space I’d expect your code to mostly work. Note that to “bake” a transform you’d need to also reset it to the identity after transforming the vertices or you’d essentially be transforming them twice.

[Eric5h5]

I use a Matrix4x4. Here’s a copy&paste from one of my utilities, where I’m baking the transform into the mesh:

	var thisMatrix = transform.localToWorldMatrix;
	for (int i = 0; i < thisPoints.Length; i++) {
		thisPoints _= thisMatrix.MultiplyPoint3x4(line.points3*);*_

* }*
Let me know if that’s not clear enough.