From Valve Developer Community
Revision as of 23:22, 28 July 2011 by Barracuda
test_tracelineis a point entity available in all Source games. It is a debugging tool for testing tracelines.
- Pitch Yaw Roll (Y Z X)
- This entity's orientation in the world. Pitch is rotation around the Y axis, yaw is the rotation around the Z axis, roll is the rotation around the X axis.