So i’m trying to rotate a cube to face “Left” from whatever rotation they were previously facing.
…
Instead of receiving 180, I instead get 7.01670955022206e-15
All of the other angles work (90, -90, 0)
If anyone has an idea of why this is happening please let me know,
Thanks!
will
March 5, 2017, 7:48pm
2
This is because euler angles are not stored internally for an entity. When you set Euler angles, internally, PlayCanvas sets a quaternion (the rotation of the entity relative to it’s parent). The code for that is here:
* @function
* @name pc.GraphNode#setLocalEulerAngles
* @description Sets the local space rotation of the specified graph node using euler angles.
* Eulers are interpreted in XYZ order. Eulers must be specified in degrees.
* @param {Number} x rotation around x-axis in degrees.
* @param {Number} y rotation around y-axis in degrees.
* @param {Number} z rotation around z-axis in degrees.
* @example
* this.entity.setLocalEulerAngles(0, 90, 0); // Set rotation of 90 degrees around y-axis.
*/
/**
* @function
* @name pc.GraphNode#setLocalEulerAngles^2
* @description Sets the local space rotation of the specified graph node using euler angles.
* Eulers are interpreted in XYZ order. Eulers must be specified in degrees.
* @param {pc.Vec3} e vector containing euler angles in XYZ order.
* @example
* var angles = new pc.Vec3(0, 90, 0);
* this.entity.setLocalEulerAngles(angles); // Set rotation of 90 degrees around y-axis.
*/
setLocalEulerAngles: function (x, y, z) {
So when you call getLocalEulerAngles, the quaternion is converted back to quaternions. For your case, you’re probably getting 180, 0, 180. This is equivalent to 0, 180, 0.
Hope that explains what you’re observing.
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