koobas.hobune.stream
transform.rotation vs Quaternion.Euler
I am using this to instantiate an object:
Instantiate (spell, transform.position + transform.forward * 2, transform.rotation);
However when I switched to:
Instantiate (spell, transform.position + transform.forward * 2, SprayDirection());
Quaternion SprayDirection() {
Quaternion spreadAngle;
float spread = Random.Range (spreadMax * -1, spreadMax);
spreadAngle = Quaternion.Euler( transform.rotation.x , transform.rotation.y, transform.rotation.z);
return spreadAngle;
}
The object is always instantiated in the same direction, regardless of the actual rotation of the transform.
A Euler Angle is an angle that you would think of as between 0 degrees and 360 degrees. transform.rotation is NOT a Euler Angle, it is a Quaternion.
3D Euler angles are represented by a Vector3 in Unity.
However, I'm assuming you want to multiply spread by the angle, so this is what you should do:
Quaternion SprayDirection() {
float spread = Random.Range(spreadMax * -1, spreadMax);
// Get the eulerAngles of transform.rotation, multiply that vector by spread, then convert it back into a Quaternion
// using Quaternion.Euler(Vector3 eulerAngles)
return Quaternion.Euler(transform.eulerAngles * spread);
}
Here is the docs for Quaternion.Euler: https://docs.unity3d.com/ScriptReference/Quaternion.Euler.html
transform.rotation: https://docs.unity3d.com/ScriptReference/Transform-rotation.html
and transform.eulerAngles: https://docs.unity3d.com/ScriptReference/Transform-eulerAngles.html
Your answer does explain the difference between the two. Thank you. Hover I found the solution by using:
Instantiate (spell, transform.position + transform.forward * 2, transform.rotation* SprayDirection());
