Assigning new Mesh Vertices

Questions & Answers
1

Hi Unity Community

I having issues with some code where I am trying to assign new values from Vector3 array to that of the vertices in the object’s mesh.

For my needs I could just delete the existing object in scene and create a new one but that isn’t really solving the issue of my logic so could anyone please provide me some pointers as to where I am going wrong?

Many thanks in advance,
Ryan

function ExpVertText(userText : String)
{ 
	var textArray = userText.Substring (1, userText.Length-2).Split ([")("], System.StringSplitOptions.RemoveEmptyEntries);
	var vectArray = new Vector3[textArray.Length];
	 for (var i = 0; i < textArray.Length; i++) {
		var numbers = textArray*.Split(","[0]);*

_ vectArray = Vector3(parseFloat(numbers[0]), parseFloat(numbers[1]), parseFloat(numbers[2]));_
* }*
* Debug.Log(“Mesh Stored”);*

* var curObj = GameObject.Find(“TestObject”); //current object*
* var curVertArray = curObj.GetComponent(MeshFilter).mesh.vertices;*

* for (var j = 0; j < vectArray.Length; j++) {*
* Debug.Log("Old vert: " + curVertArray[j]);*
* curVertArray[j] = vectArray[j];*
* Debug.Log("New vert: " + curVertArray[j]);*
* }*

* Debug.Log(“Mesh Updated”);*
* return curObj;*
}

2

Try the examples provided here:

I believe the documentation is correct.

3

Mesh.vertices returns a copy of the vertex positions or assigns a new vertex positions array.

When you assign the vertices to curVertArray you are assigning them to a copy of Mesh.vertices. You need to assign curVertArray back to Mesh.vertices after you are done editing it, i.e. add the following line at line 20

curObj.GetComponent(MeshFilter).mesh.vertices=curVertArray;