How to copy a rectangle area from a texture to another one

[anon_48995762]

I wanted to know how to copy a rectangular area of one texture to another texture.

For instance copy from texture A’s coordinates 0,0 (x1, y1) 100,100 (x2,y2) to texture B’s coordinates 100,100 (x1, y1) 200,200 (x2, y2)

This was easy to do in Director becuase they had a great blitting interface to manipulate textures. In .NET you can use many of the standard system.drawing functions, but I am not sure how well those work on the MAC.

Since I don’t see any thing jumping out at me in looking through the Unity functions, I am really hoping I am missing something. This is something that is very important for the product we are designing. I am sure there is probably a way and I am just missing it :?

Thanks for any help!

[tz_1]

Unity - Scripting API: Texture2D.GetPixels

function GetPixels (x : int, y : int, blockWidth : int, blockHeight : int, miplevel : int) : Color[ ]
Description

Get a block of pixel colors.

This function is an extended version of GetPixels above; it does not return the whole mip level but only blockWidth by blockHeight region starting at x,y. The block must fit into the used mip level. The returned array is blockWidth*blockHeight size.

to write them back:

Unity - Scripting API: Texture2D.SetPixels

function SetPixels (x : int, y : int, blockWidth : int, blockHeight : int, colors : Color[ ], miplevel : int) : void
Description

Set a block of pixel colors.

This function is an extended version of SetPixels above; it does not modify the whole mip level but modifies only blockWidth by blockHeight region starting at x,y. The colors array must be blockWidth*blockHeight size, and the modified block must fit into the used mip level.

[StarManta]

Check the GetPixels and SetPixels funcitons in Texture2D. It sounds like you should have a good idea of what to do from there.

[janoonk]

You can also use this if you want to copy the whole texture:

// duplicate the original texture
var texture : Texture2D = Instantiate(renderer.material.mainTexture);

You can also reference the whole texture:

// reference the original texture
var texture : Texture2D = renderer.material.mainTexture;