/// <summary>
/// Construct a collision part from a plane.
/// </summary>
/// <param name="p">A point with which the plane intersects.</param>
/// <param name="normal">The plane normal.</param>
public PlanePart(Vector3 p, Vector3 normal)
{
this._point = p;
this._normal = normal;
Plane = new Plane(p, normal);
}
/// <summary>
/// Intersects a segment with this collision skin part and returns the intersection point that is nearest to the
/// beginning of the segment.
/// </summary>
/// <param name="segment">The segment to intersect with.</param>
/// <param name="scalar">Returns a value between 0 and 1 indicating where on the segment the first intersection occurs.</param>
/// <param name="point">Returns the point of the first intersection.</param>
/// <returns>Returns a value indicating whether the segment intersects with the part.</returns>
public override bool Intersect(ref Segment segment, out float scalar, out Vector3 point)
{
scalar = float.PositiveInfinity;
point = Vector3.Zero;
float scalar1;
Vector3 point1;
for (int i = 0; i < FaceCount; i++)
{
var face = Face(i);
Vector3 p0;
World(face[0], out p0);
var plane = new Plane(p0, _faceNormals[i]);
if (plane.Intersect(ref segment, out scalar1, out point1) &&
scalar1 < scalar && IsPointOnFace(i, ref point1, true))
{
scalar = scalar1;
point = point1;
}
}
return !float.IsPositiveInfinity(scalar);
}