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Question by Ox6c23 · Sep 09, 2018 at 06:02 PM · c#vrvector3anglethrow

Vector3.Angle is wrong

I am trying to get the throwing angle of an object thrown in VR. The white line is the velocity of the controller, I am taking an average of the last frames here to describe the direction the controller is moving. While throwing, I want to get the angle between the avg. velocity and the horizontal forward direction (red line). However, my code reports the wrong angles, no matter what I try.

In the example picture, the reported angle is 11 deg. My code is:

 Vector3 angleOne = AttachedHand.velocity.normalized;
 Vector3 angleTwo = new Vector3(AttachedHand.velocity.x, this.transform.position.y, AttachedHand.velocity.z);
 
 //float angle = Vector3.Angle(angleOne, angleTwo);
 
 float angle = Mathf.Atan2(Vector3.Magnitude(Vector3.Cross(angleOne, angleTwo)), Vector3.Dot(angleOne, angleTwo));
 angle = angle * Mathf.Rad2Deg;

alt text

throwingangle.png (50.7 kB)
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Answer by Bunny83 · Sep 09, 2018 at 10:26 PM

Uhm the horizontal vector that points in the same direction of your velocity is

 new Vector3(AttachedHand.velocity.x, 0, AttachedHand.velocity.z);

using transform.position.y makes no sense in a direction vector.

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