public Building(EdgeLoop <CityEdge> footprint, float floorHeight, int floors, City city)
{
this.footprint = footprint;
Vector2[] footprintPoints = footprint.GetPoints();
basePoints = new Vector3[footprintPoints.Length];
float highestBasePoint = float.MinValue;
for (int i = 0; i < basePoints.Length; i++)
{
Vector2 fpPt = footprintPoints[i];
basePoints[i] = new Vector3(fpPt.x, city.SampleElevation(fpPt.x, fpPt.y), fpPt.y);
if (basePoints[i].y > highestBasePoint)
{
highestBasePoint = basePoints[i].y;
}
}
this.foundationFirstFloorGap = 0.2f;
this.elevation = highestBasePoint;
this.floorHeight = floorHeight;
this.floors = floors;
this.city = city;
}
public Mesh GetMesh()
{
List <Vector3> verts = new List <Vector3>();
List <int> tris = new List <int>();
HashSet <int> borderVerts = new HashSet <int>();
Polygon footprintPoly = footprint.GetPolygon();
Rect bounds = footprint.GetBounds();
Vector2 centroid = footprintPoly.centroid;
Vector2[] points = footprint.GetPoints();
for (int i = 0; i < points.Length; i++)
{
Vector2 p1 = points[i];
Vector2 p2 = points[(i + 1) % points.Length];
float dist = Vector2.Distance(p1, p2) * pointsPerUnit;
float p1Elev = city.SampleElevation(p1.x, p1.y);
float p2Elev = city.SampleElevation(p2.x, p2.y);
int numPointsAlongEdge = Mathf.CeilToInt(dist);
for (int j = 0; j < numPointsAlongEdge; j++)
{
float t = (float)j / (numPointsAlongEdge);
Vector2 lerpP = Vector2.Lerp(p1, p2, t);
Vector3 p3D = new Vector3(lerpP.x, Mathf.Lerp(p1Elev, p2Elev, t), lerpP.y);
verts.Add(p3D);
borderVerts.Add(verts.Count - 1);
}
}
int numPointsX = Mathf.CeilToInt(bounds.width * pointsPerUnit);
int numPointsY = Mathf.CeilToInt(bounds.height * pointsPerUnit);
Polygon[] triangleFan = new Polygon[points.Length];
for (int i = 0; i < points.Length; i++)
{
triangleFan[i] = new Polygon(new Vector2[] { points[i], points[(i + 1) % points.Length], centroid });
}
float edgeBlendDist = 3f;
for (int x = 0; x < numPointsX; x++)
{
for (int y = 0; y < numPointsY; y++)
{
float xT = (float)x / (numPointsX - 1);
float yT = (float)y / (numPointsY - 1);
Vector2 realPos = new Vector2(xT * bounds.width + bounds.xMin, yT * bounds.height + bounds.yMin);
float perimDist = footprint.DistToPerimeter(realPos);
if (footprintPoly.ContainsPoint(realPos) && perimDist > 0.5f)
{
float elevation = city.SampleElevation(realPos.x, realPos.y);
if (perimDist < edgeBlendDist)
{
for (int i = 0; i < triangleFan.Length; i++)
{
if (triangleFan[i].ContainsPoint(realPos))
{
Vector2 vert1 = triangleFan[i].points[0];
Vector2 vert2 = triangleFan[i].points[1];
Vector2 vert3 = triangleFan[i].points[2];
float elev1 = city.SampleElevation(vert1.x, vert1.y);
float elev2 = city.SampleElevation(vert2.x, vert2.y);
float elev3 = city.SampleElevation(vert3.x, vert3.y);
float blendElevation = HelperFunctions.TriangleInterp(realPos, vert1, vert2, vert3, elev1, elev2, elev3);
elevation = Mathf.Lerp(blendElevation, elevation, perimDist / edgeBlendDist);
}
}
}
verts.Add(new Vector3(realPos.x, elevation, realPos.y));
}
}
}
return(HelperFunctions.GetTriangulationMesh(verts.ToArray(), borderVerts, footprintPoly));
}
public Mesh GetMesh()
{
Vector2[] footprintVerts = footprint.GetPoints();
List <Vector3> verts = new List <Vector3>();
List <int> tris = new List <int>();
int[,] floorLoopVerts = new int[floors + 2, footprintVerts.Length];
for (int i = 0; i < floors + 2; i++)
{
float vertElev = elevation + floorHeight * (i - 1) + foundationFirstFloorGap;
for (int j = 0; j < footprintVerts.Length; j++)
{
if (i == 0)
{
vertElev = basePoints[j].y;
}
verts.Add(new Vector3(footprintVerts[j].x, vertElev, footprintVerts[j].y));
floorLoopVerts[i, j] = verts.Count - 1;
}
}
for (int i = 0; i < floors + 1; i++)
{
for (int j = 0; j < footprintVerts.Length; j++)
{
int nextI = (i + 1);
int nextJ = (j + 1) % footprintVerts.Length;
tris.Add(floorLoopVerts[i, j]);
tris.Add(floorLoopVerts[nextI, nextJ]);
tris.Add(floorLoopVerts[i, nextJ]);
tris.Add(floorLoopVerts[i, j]);
tris.Add(floorLoopVerts[nextI, j]);
tris.Add(floorLoopVerts[nextI, nextJ]);
}
}
Vector3 center = footprint.GetCenter();
center = new Vector3(center.x, (floors + 1) * floorHeight + elevation + foundationFirstFloorGap, center.y);
verts.Add(center);
int centerVertIndex = verts.Count - 1;
for (int j = 0; j < footprintVerts.Length; j++)
{
int nextJ = (j + 1) % footprintVerts.Length;
tris.Add(floorLoopVerts[floors + 1, nextJ]);
tris.Add(floorLoopVerts[floors + 1, j]);
tris.Add(centerVertIndex);
}
Mesh mesh = new Mesh();
mesh.vertices = verts.ToArray();
mesh.triangles = tris.ToArray();
mesh.RecalculateBounds();
mesh.RecalculateNormals();
return(mesh);
}
