/// <summary>
/// Does this ray intersect the provided polygon area?
/// </summary>
/// <param name="polygon">The Polygon to intersect with.</param>
/// <param name="result">The intersection result.</param>
/// <returns>True if an intersection occurs, otherwise false. If true, check the intersection result for the location of the intersection.</returns>
public bool Intersects(Polygon polygon, out Vector3 result)
{
var plane = new Plane(polygon.Vertices.First(), polygon.Vertices);
if (Intersects(plane, out Vector3 intersection))
{
var transformToPolygon = new Transform(plane.Origin, plane.Normal);
var transformFromPolygon = new Transform(transformToPolygon);
transformFromPolygon.Invert();
var transformedIntersection = transformFromPolygon.OfPoint(intersection);
IEnumerable <Line> curveList = polygon.Segments();
curveList = curveList.Select(l => l.TransformedLine(transformFromPolygon));
if (Polygon.Contains(curveList, transformedIntersection, out _))
{
result = intersection;
return(true);
}
}
result = default(Vector3);
return(false);
}
/// <summary>
/// Extend this line to its (nearest, by default) intersection with a polygon.
/// </summary>
/// <param name="polygon">The polygon to intersect with</param>
/// <param name="bothSides">Optional — if false, will only extend in the line's direction; if true will extend in both directions.</param>
/// <param name="extendToFurthest">Optional — if true, will extend line as far as it will go, rather than stopping at the closest intersection.</param>
public Line ExtendTo(Polygon polygon, bool bothSides = true, bool extendToFurthest = false)
{
return(ExtendTo(polygon.Segments(), bothSides, extendToFurthest));
}
/// <summary>
/// Extend this line to its (nearest, by default) intersection with a polygon.
/// </summary>
/// <param name="polygon">The polygon to intersect with</param>
/// <param name="bothSides">Optional — if false, will only extend in the line's direction; if true will extend in both directions.</param>
/// <param name="extendToFurthest">Optional — if true, will extend line as far as it will go, rather than stopping at the closest intersection.</param>
/// <param name="tolerance">Optional — The amount of tolerance to include in the extension method.</param>
public Line ExtendTo(Polygon polygon, bool bothSides = true, bool extendToFurthest = false, double tolerance = Vector3.EPSILON)
{
return(ExtendTo(polygon.Segments(), bothSides, extendToFurthest, tolerance));
}