Comments on: WTF XNA, Quaternion to Euler conversion

By: RohoMech

RohoMech — Tue, 07 Apr 2009 13:57:29 +0000

Hi Scott,

Yea, it looks like what I’ve posted isn’t working for your case.
Though, this code didn’t make its way into production, sorry you’re that found the issue.

The approach we ended up taking was to store both the Euler angles along with the quaternion.

By: Scott Peal

Scott Peal — Mon, 06 Apr 2009 19:37:45 +0000

Thread I am also trying to sind a solution and mentioned your post: http://forums.xna.com/forums/p/28687/159870.aspx#159870

By: Scott Peal

Scott Peal — Mon, 06 Apr 2009 19:36:43 +0000

I put in the following and expected to get back something different:

Quaternion quat1 = Quaternion.CreateFromAxisAngle(Vector3.UnitY, (float)Math.PI); //180 degres
Quaternion quat2 = Quaternion.CreateFromAxisAngle(Vector3.UnitX, (float)Math.PI); //180 degres
Quaternion quat = quat1 * quat2;

?v
{X:5.008956E-06 Y:-5.008956E-06 Z:180}
X: 0.00000500895567
Y: -0.00000500895567
Z: 180.0

I would have expected to get:
X: 180
Y: 180
Z: 0