what about references?

Questions & Answers
1

Hello!

I am quite experienced in plain c# but not in unity. I don’t understand a line in this code (from http://unity3d.com/support/documentation/ScriptReference/Mesh-vertices.html):

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

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

mesh.vertices = vertices;
mesh.RecalculateBounds();
}
Why has the vertices array to be assigned back to mesh.vertices? Is not the vertices a plain reference to mesh.vertices? I’m afraid I’m missing an important point here, could anyone help please?

2

The mesh has to be uploaded to the graphics card. The graphics card does not access system memory (and, likewise, your code has no access to VRAM).

3 
var vertices : Vector3[] = mesh.vertices;

This doesn't look like it's referencing anything really. The overload is probably just an array copy instruction.