public Circle3XZ(Vector3 center, Vector3 pointOnCircle)
{
if (pointOnCircle == center)
{
this.center = center;
this.radius = 0f;
this.angleStart = 0f;
return;
}
this.center = center;
center.y = 0f;
pointOnCircle.y = 0f;
Vector3 _radiusVector = pointOnCircle - center;
this.radius = _radiusVector.magnitude;
//this.angleStart = MathPLT.AngleSigned(_radiusVector, Vector3.right, Vector3.up) + Mathf.PI;
this.angleStart = MathPLT.AngleSigned(_radiusVector, Vector3.right, Vector3.up);
}
/// <summary>
/// Returns the angle, in radians, between a line pointing from the center to a given point, and the line pointing from the center to the start point (t = 0f).
/// </summary>
/// <param name="position"></param>
/// <returns></returns>
public float AngleFromStartXZ(Vector3 position)
{
float _angleFromStart = 0f;
Vector3 _pointVector = position - this.center;
_pointVector.y = 0f;
_pointVector.Normalize();
Vector3 _zeroVector = this.Position(0f) - this.center;
_zeroVector.y = 0f;
_zeroVector.Normalize();
_angleFromStart = MathPLT.AngleSigned(_pointVector, _zeroVector, Vector3.up);
if (_angleFromStart < 0f)
{
_angleFromStart += 2f * Mathf.PI;
}
return(_angleFromStart);
}