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Mesh.vertices

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public var vertices: Vector3[];
public Vector3[] vertices;

Description

Returns a copy of the vertex positions or assigns a new vertex positions array.

The number of vertices in the Mesh is changed by assigning a vertex array with a different number of vertices. Note that if you resize the vertex array then all other vertex attributes (normals, colors, tangents, UVs) are automatically resized too. RecalculateBounds is automatically invoked if no vertices have been assigned to the Mesh when setting the vertices.

function Update () {
    var mesh : Mesh = GetComponent.<MeshFilter>().mesh;
    var vertices : Vector3[] = mesh.vertices;

for (var i = 0; i < vertices.Length; i++) vertices[i] += Vector3.up * Time.deltaTime;

// assign the local vertices array into the vertices array of the Mesh. mesh.vertices = vertices; mesh.RecalculateBounds(); }
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { void Update() { Mesh mesh = GetComponent<MeshFilter>().mesh; Vector3[] vertices = mesh.vertices; int i = 0; while (i < vertices.Length) { vertices[i] += Vector3.up * Time.deltaTime; i++; } mesh.vertices = vertices; mesh.RecalculateBounds(); } }

Note: To make changes to the vertices it is important to copy the vertices from the Mesh. Once the vertices have been copied and changed the vertices can be reassigned back to the Mesh.