How do I calculate visual angles of objects in vizard?
 

I am using the DK1 Oculus rift. How can I calculate the visual angles of objects in the scene?

The vizmat library includes commands for calculating angles and other mathematical operations. Can you describe further what you mean by visual angles?

From wikipedia: "The visual angle is the angle a viewed object subtends at the eye, usually stated in degrees of arc. It also is called the object's angular size."

Heres a diagram:
https://upload.wikimedia.org/wikiped...onDefs.svg.png

Basically I want to find the perceived size of an object in terms of angle occupied in the visual space. I wasn't sure how to calculate this because I don't know how vizard calculates each screen or how the oculus may distort things.

Also, is there an easy way to measure how big an object in vizard is?

You can use vizmat.Distance to calculate the distance from the viewpoint to an object and node.getBoundingBox to get the dimensions of an object.