Array index is out of range

Questions & Answers
1

I have one question, I have the script to edit all children in the object, from second object. Both objects have the same number of children, of course, the same material … but after running I got error “Array index is out of range.” It’s strange, because if I set the same object for regular and smoothed, here’s no error as well if objects have only one child … I tried foreach instead of for, but it did not help … Any ideas?

    public GameObject regularMesh;
	public GameObject smoothedMesh;

	private float ScaleAndBias(float normal)
	{
		return (normal * 0.5f + 0.5f);
	}

	void  Start (){
		MeshFilter[] allChildren = new MeshFilter[regularMesh.transform.childCount];
		allChildren = regularMesh.GetComponentsInChildren<MeshFilter>();
		MeshFilter[] allChildren2 = new MeshFilter[regularMesh.transform.childCount];
		allChildren2 = smoothedMesh.GetComponentsInChildren<MeshFilter>();

		for (int m = 0; m < allChildren.Length; m++){

			Mesh m1 = allChildren[m].mesh;
			Mesh m2 = allChildren2[m].mesh;

			GameObject go = new GameObject(allChildren[m].transform.name);
			go.transform.parent = this.transform;

			MeshFilter meshFilter;
			meshFilter = go.AddComponent<MeshFilter>();

			MeshRenderer meshRenderer;
			meshRenderer = go.AddComponent<MeshRenderer>();
			meshRenderer.materials = allChildren[m].renderer.materials;
			Mesh newMesh = new Mesh();
			meshFilter.mesh = newMesh;

		Color[] newColors = new Color[m1.vertexCount];

		for (int i = 0; i < m1.vertexCount; i++)
		{
			newColors <em>= new Color(ScaleAndBias(m2.normals<em>.x), ScaleAndBias(m2.normals_.y), ScaleAndBias(m2.normals*.z));*_</em></em>

* }*

* newMesh.vertices = m1.vertices;*
* newMesh.triangles = m1.triangles;*
* newMesh.normals = m1.normals;*
* newMesh.uv = m1.uv;*
* newMesh.colors = newColors;*

* }*

* //ObjExporter.MeshToFile (meshFilter, Application.dataPath + “//Test.obj”, true);*
* }*

2

m2 has fewer vertices than m1. You are using m1 vertex count to iterate m2.

for (int i = 0; i < m1.vertexCount; i++)
{
    newColors <em>= new Color(ScaleAndBias(m2.normals<em>.x), ScaleAndBias(m2.normals_.y), ScaleAndBias(m2.normals*.z));*_</em></em>

}
I assume that your smooth model is smoothed from a 3D program. That means that a lot of the vertex can be reused for several polygons, as they now have a shared normal. Where none smooted models have three unique vertex per triangle. Your polycount may still be the same, but the vertex and normal count can differ.