private void UpdateHeights(BuildingPlan plan, HeightMap heightMap)
{
var levels = plan.Polygon.Corners.Select(v => heightMap.GetHeight(v));
plan.GroundLevel = levels.Max();
plan.LowGroundLevel = levels.Min();
}
internal void CreateWalls(Mesh.Factory factory, BuildingPlan plan)
{
for (var i = 0; i < plan.Polygon.Corners.Length; i++)
{
var c0 = plan.Polygon.Corners[i];
var c1 = plan.Polygon.Corners[(i + 1) % plan.Polygon.Corners.Length];
var c0To1 = c1 - c0;
var v0 = new Mesh.Vertex
{
Pos = new Vector3(c0.X, plan.LowGroundLevel, c0.Y),
TexCoords = new Vector2()
};
var v0To1 = new Mesh.Vertex
{
Pos = new Vector3(c0To1.X, 0, c0To1.Y),
TexCoords = new Vector2(c0To1.Length, 0)
};
var v0To2 = new Mesh.Vertex
{
Pos = new Vector3(0, plan.RoofLevel - plan.LowGroundLevel, 0),
TexCoords = new Vector2(0, plan.RoofLevel - plan.LowGroundLevel)
};
factory.AddSurface(v0, v0To1, v0To2);
}
}
internal BuildingPlan Generate(Vector2 center, Vector2 size)
{
var floorPlan = new BuildingPlan();
var polygons = new List <Polygon2D>();
var prob = _rnd.NextDouble();
if (prob < 0.6)
{
floorPlan.Polygon = Rect(center, size);
}
else
{
floorPlan.Polygon = Poly(center, size, _rnd.Next(3, 6));
}
return(floorPlan);
}
// Code works only for convex polygons for now.
private void CreateRoofConvex(Mesh.Factory factory, BuildingPlan plan)
{
Debug.Assert(IsConvexPolygon(plan.Polygon));
var offset = factory.Vertices.Count;
foreach (var c in plan.Polygon.Corners)
{
factory.Vertices.Add(new Mesh.Vertex
{
Pos = new Vector3(c.X, plan.RoofLevel, c.Y),
TexCoords = c, // TODO
Normal = Vector3.UnitY
});
}
for (var i = 0; i < plan.Polygon.Corners.Length - 2; i++)
{
factory.Faces.Add(new Mesh.Face(offset, offset + i + 1, offset + i + 2));
}
}
internal void CreateRoof(Mesh.Factory factory, BuildingPlan plan)
{
CreateRoofConvex(factory, plan);
}
