Convert screenspace coordinates (top-left origin) to worldspace coordinates. Read before you react!

[brain56]

OK, I give up.

I’m trying to convert a screenspace coordinate to worldspace coordinate and I was able to perform some transformations using

Camera.ViewportToWorldPoint Camera.ScreenToWorldPoint

They transform, but incorrectly. Is there anything else I should consider before using these methods?

This guy seems to have the same problem too: http://answers.unity3d.com/questions/26040/converting-from-screen-to-world-space-it-seems-bro.html

Thanks in advance.

[Bunny83]

They work as they should. Where do you use the world position? The other question you’ve linked has a different problem i guess. He’s using the GL class without setting a projection / modelview matrix so his coordinate system is something from the last rendered object.

Just read the docs on

• Camera.ScreenToWorldPoint
• Camera.ViewportToWorldPoint
• GL.LINES
• GL.LoadOrtho sets up a ortographic projection so you can use directly viewport coordinates
• GL.LoadProjectionMatrix sets the given matrix as projection matrix
• GL.modelview sets the modelview matrix