[15488] | 1 | using System;
|
---|
| 2 | using System.Collections.Generic;
|
---|
| 3 | using System.Linq;
|
---|
| 4 | using System.Text;
|
---|
| 5 | using System.Threading.Tasks;
|
---|
| 6 |
|
---|
| 7 | namespace HeuristicLab.Problems.BinPacking3D.Geometry {
|
---|
| 8 | public class Edge3D {
|
---|
| 9 | public Edge3D() { }
|
---|
| 10 |
|
---|
| 11 | public Edge3D(PackingPosition start, PackingPosition end) {
|
---|
| 12 | Start = new Vector3D(start);
|
---|
| 13 | End = new Vector3D(end);
|
---|
| 14 | }
|
---|
| 15 |
|
---|
| 16 | public Edge3D(Vector3D start, Vector3D end) {
|
---|
| 17 | Start = start;
|
---|
| 18 | End = end;
|
---|
| 19 | }
|
---|
| 20 |
|
---|
| 21 | public Vector3D Start { get; set; }
|
---|
| 22 | public Vector3D End { get; set; }
|
---|
| 23 |
|
---|
| 24 |
|
---|
| 25 |
|
---|
| 26 |
|
---|
| 27 | /// <summary>
|
---|
| 28 | /// Returns true if a given point lies on the edge.
|
---|
| 29 | /// </summary>
|
---|
| 30 | /// <param name="point"></param>
|
---|
| 31 | /// <returns>Returns true if a given point lies on the edge.</returns>
|
---|
| 32 | public bool LiesOn(Vector3D point) {
|
---|
| 33 | if (point == null) {
|
---|
| 34 | return false;
|
---|
| 35 | }
|
---|
| 36 | var x = (Start.X <= point.X && point.X <= End.X) || (Start.X >= point.X && point.X >= End.X);
|
---|
| 37 | var y = (Start.Y <= point.Y && point.Y <= End.Y) || (Start.Y >= point.Y && point.Y >= End.Y);
|
---|
| 38 | var z = (Start.Z <= point.Z && point.Z <= End.Z) || (Start.Z >= point.Z && point.Z >= End.Z);
|
---|
| 39 | return x && y && z;
|
---|
| 40 | }
|
---|
| 41 |
|
---|
| 42 |
|
---|
| 43 | /// <summary>
|
---|
| 44 | /// Returns a point where the two edges intersects.
|
---|
| 45 | /// It returns null if they don't intersect.
|
---|
| 46 | /// </summary>
|
---|
| 47 | /// <param name="edge"></param>
|
---|
| 48 | /// <returns>Returns a point where the two edges intersects. Null = no intersection.</returns>
|
---|
| 49 | public Vector3D Intersects(Edge3D edge) {
|
---|
| 50 | return Intersects(this, edge);
|
---|
| 51 | }
|
---|
| 52 |
|
---|
| 53 | /// <summary>
|
---|
[15520] | 54 | /// Returns a point where two edges are intersecting.
|
---|
[15488] | 55 | /// It returns null if they don't intersect.
|
---|
| 56 | /// </summary>
|
---|
| 57 | /// <param name="e1"></param>
|
---|
| 58 | /// <param name="e2"></param>
|
---|
| 59 | /// <returns>Returns a point where the two edges intersects. Null = no intersection.</returns>
|
---|
| 60 | public static Vector3D Intersects(Edge3D e1, Edge3D e2) {
|
---|
| 61 | Line3D l1 = new Line3D(e1.Start, new Vector3D() {
|
---|
| 62 | X = e1.Start.X - e1.End.X,
|
---|
| 63 | Y = e1.Start.Y - e1.End.Y,
|
---|
| 64 | Z = e1.Start.Z - e1.End.Z
|
---|
| 65 | });
|
---|
| 66 | Line3D l2 = new Line3D(e2.Start, new Vector3D() {
|
---|
| 67 | X = e2.Start.X - e2.End.X,
|
---|
| 68 | Y = e2.Start.Y - e2.End.Y,
|
---|
| 69 | Z = e2.Start.Z - e2.End.Z
|
---|
| 70 | });
|
---|
| 71 | Vector3D point = l1.Intersect(l2);
|
---|
| 72 | if (e1.LiesOn(point) && e2.LiesOn(point)) {
|
---|
| 73 | return point;
|
---|
| 74 | }
|
---|
| 75 | return null;
|
---|
| 76 | }
|
---|
| 77 | }
|
---|
| 78 | }
|
---|