Bug with GetPixels()?

Hello guys,

I don't know if this is a bug. Take a look at this code:

private Texture2D tempTexture;

private void CopyToTestTexture(Texture2D source) { if (tempTexture == null) { tempTexture = new Texture2D(source.width, source.height); }

tempTexture.SetPixels(source.GetPixels()); tempTexture.Apply();

GUITexture testGuiTexture = GameObject.Find("Test").guiTexture; testGuiTexture.texture = tempTexture; // just to render to see if it copied it well }

It just copies the specified source texture unto a temporary using SetPixels(). It works fine for power-of-2 textures, but not for non power-of-2 textures.

What I'm trying to achieve is get a pixel from the texture, check its alpha against a certain threshold such that I can flag it as a collision hit when clicked. My game requires that clicking on a transparent part of the image should not trigger a hit. Maybe you can give another solution.

Note that my textures are imported with:

void OnPreprocessTexture() {
    TextureImporter importer = (TextureImporter) assetImporter;
    importer.textureType = TextureImporterType.Advanced;
    importer.npotScale  = TextureImporterNPOTScale.None;
    importer.isReadable = true;
}

I can't scale textures because it produces visual artifacts on the scene. I am porting a hidden object game. You might have other ideas.