public static MeshInfo GetRoofInfo(PolygonLoops polygonLoops, float height)
{
Vector2[] outerLoop = polygonLoops.OuterLoop;
Vector2[][] holeLoops = polygonLoops.InnerLoops;
Sebastian.Geometry.Polygon polygon2D;
if (holeLoops.Length == 0)
{
polygon2D = new Sebastian.Geometry.Polygon(outerLoop);
}
else
{
polygon2D = new Sebastian.Geometry.Polygon(outerLoop, holeLoops);
}
Sebastian.Geometry.Triangulator triangulator = new Sebastian.Geometry.Triangulator(polygon2D);
int[] triangles = triangulator.Triangulate();
Vector2[] vertices2D = polygon2D.points;
Vector3[] vertices3D = new Vector3[vertices2D.Length * 2];
int i = 0;
foreach (var vertex2D in vertices2D)
{
vertices3D[i] = new Vector3(vertex2D.x, height, vertex2D.y);
i++;
}
Vector2[] uvs = new Vector2[vertices3D.Length];
for (int k = 0; k < uvs.Length; k++)
{
uvs[k] = new Vector3(vertices3D[k].x, vertices3D[k].z);
}
return(new MeshInfo(vertices3D, triangles.ToArray(), uvs));
}
public void Process()
{
// Generate array of valid shape data
CompositeShapeData[] eligibleShapes = shapes.Select(x => new CompositeShapeData(x.points.ToArray())).Where(x => x.IsValidShape).ToArray();
// Set parents for all shapes. A parent is a shape which completely contains another shape.
for (int i = 0; i < eligibleShapes.Length; i++)
{
for (int j = 0; j < eligibleShapes.Length; j++)
{
if (i == j)
{
continue;
}
if (eligibleShapes[i].IsParentOf(eligibleShapes[j]))
{
eligibleShapes[j].parents.Add(eligibleShapes[i]);
}
}
}
// Holes are shapes with an odd number of parents.
CompositeShapeData[] holeShapes = eligibleShapes.Where(x => x.parents.Count % 2 != 0).ToArray();
foreach (CompositeShapeData holeShape in holeShapes)
{
// The most immediate parent (i.e the smallest parent shape) will be the one that has the highest number of parents of its own.
CompositeShapeData immediateParent = holeShape.parents.OrderByDescending(x => x.parents.Count).First();
immediateParent.holes.Add(holeShape);
}
// Solid shapes have an even number of parents
CompositeShapeData[] solidShapes = eligibleShapes.Where(x => x.parents.Count % 2 == 0).ToArray();
foreach (CompositeShapeData solidShape in solidShapes)
{
solidShape.ValidateHoles();
}
// Create polygons from the solid shapes and their associated hole shapes
Polygon[] polygons = solidShapes.Select(x => new Polygon(x.polygon.points, x.holes.Select(h => h.polygon.points).ToArray())).ToArray();
// Flatten the points arrays from all polygons into a single array, and convert the vector2s to vector3s.
vertices = polygons.SelectMany(x => x.points.Select(v2 => new Vector3(v2.x, height, v2.y))).ToArray();
// Triangulate each polygon and flatten the triangle arrays into a single array.
List <int> allTriangles = new List <int>();
int startVertexIndex = 0;
for (int i = 0; i < polygons.Length; i++)
{
Triangulator triangulator = new Triangulator(polygons[i]);
int[] polygonTriangles = triangulator.Triangulate();
for (int j = 0; j < polygonTriangles.Length; j++)
{
allTriangles.Add(polygonTriangles[j] + startVertexIndex);
}
startVertexIndex += polygons[i].numPoints;
}
triangles = allTriangles.ToArray();
}
