private void InstantiatePolygon(Polygon polygon, IDictionary <string, dynamic> properties, Tile tile,
Vector2 originInMeters)
{
PolygonLoops polygonLoops = BuildingPropertiesHelper.GetPolygonLoopsInMeters(polygon, originInMeters);
int levels = BuildingPropertiesHelper.GetNumberOfLevels(properties);
float height = levels * NumericConstants.LEVEL_HEIGHT;
MeshInfo roofInfo;
MeshInfo wallInfo;
try
{
roofInfo = BuildingPropertiesHelper.GetRoofInfo(polygonLoops, height);
wallInfo = BuildingPropertiesHelper.GetWallInfo(polygonLoops, height);
}
catch
{
Debug.Log("Some roofs are not visualized.");
return;
}
InstantiateObject(tile, roofInfo, RoofMaterial, RoofPrefab);
InstantiateObject(tile, wallInfo, WallMaterial, WallPrefab);
}
public static MeshInfo GetWallInfo(PolygonLoops polygonLoops, float height)
{
List <int> triangles = new List <int>();
List <Vector3> vertices = new List <Vector3>();
foreach (var loop in polygonLoops.AllLoops)
{
int offset = vertices.Count;
foreach (var vertex2D in loop)
{
vertices.Add(new Vector3(vertex2D.x, 0, vertex2D.y));
vertices.Add(new Vector3(vertex2D.x, height, vertex2D.y));
}
vertices.Add(vertices[0]);
vertices.Add(vertices[1]);
int size = loop.Length * 2 + 2;
for (int i = 0; i < loop.Length; i++)
{
triangles.Add(offset + (i * 2));
triangles.Add(offset + ((i * 2 + 1) % size));
triangles.Add(offset + (((i + 1) * 2) % size));
triangles.Add(offset + ((i * 2 + 1) % size));
triangles.Add(offset + (((i + 1) * 2 + 1) % size));
triangles.Add(offset + (((i + 1) * 2) % size));
}
triangles.Add(vertices.Count - 2);
triangles.Add(vertices.Count - 4);
triangles.Add(vertices.Count - 3);
triangles.Add(vertices.Count - 2);
triangles.Add(vertices.Count - 3);
triangles.Add(vertices.Count - 1);
}
Vector2[] uvs = new Vector2[vertices.Count];
float x = 0;
for (int i = 0; i < uvs.Length; i += 2)
{
uvs[i] = new Vector2(x, 0);
uvs[i + 1] = new Vector2(x, height);
x += Vector3.Distance(vertices[i], vertices[(i + 2) % vertices.Count]);
}
return(new MeshInfo(vertices.ToArray(), triangles.ToArray(), uvs));
}
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));
}
