modifying a GameObject's geometry data (mesh) in Unity

warpmesh.js

#pragma strict

// Script to warp an existing mesh.
// This can be attached to any GameObject that includes a Mesh Filter.
// It will move the vertices up and down in Y, based on the sine of the X
// value + the time.

private var originalVerts : Vector3[];

function Start ()
    {
    var m = GetComponent.<MeshFilter>().mesh;
    originalVerts = m.vertices;
    }


function Update()
    {
    var m = GetComponent.<MeshFilter>().mesh;
    var verts = m.vertices;
    for (var i=0; i < verts.Length; i++)
        {
        verts[i] = originalVerts[i] + Vector3(0,Mathf.Sin(originalVerts[i][0]*3+Time.time)/4.0, 0);
        }
    m.vertices = verts;
    }