using UnityEngine;

[AddComponentMenu("MegaShapes/Line")]
public class MegaShapeLine : MegaShape
{
	public int			points = 2;
	public float		length	= 1.0f;
	public float		dir = 0.0f;
	public Transform	end;

	public override void MakeShape()
	{
		Matrix4x4 tm = GetMatrix();

		// Delete all points in the existing spline
		MegaSpline spline = NewSpline();

		float len = length;
		Vector3 ep = Vector3.zero;

		if ( end )
		{
			ep = transform.worldToLocalMatrix.MultiplyPoint(end.position);
			len = ep.magnitude;
		}
		else
		{
			ep.x = Mathf.Sin(Mathf.Deg2Rad * dir) * len;
			ep.z = Mathf.Cos(Mathf.Deg2Rad * dir) * len;
		}

		Vector3 norm = ep.normalized;

		if ( points < 2 )
			points = 2;

		float vlen = (len / (float)(points + 0)) / 2.0f;

		for ( int ix = 0; ix < points; ++ix )
		{
			float alpha = (float)ix / (float)(points - 1);
			//float sinfac = Mathf.Sin(Mathf.Deg2Rad * dir);
			//float cosfac = Mathf.Cos(Mathf.Deg2Rad * dir);
			Vector3 p = Vector3.Lerp(Vector3.zero, ep, alpha);
			Vector3 rotvec = new Vector3(norm.x * vlen, norm.y * vlen, norm.z * vlen);
			Vector3 invec = p - rotvec;
			Vector3 outvec = p + rotvec;
			spline.AddKnot(p, invec, outvec, tm);
		}

		CalcLength();	//10);
	}
}