void Triangulate(HexDirection direction, HexCell cell)
{
bool isDeep = cell.Elevation == ElevationLevel.Deep ? true : false;
Vector3 center = cell.transform.localPosition;
Vector3 v1 = center + HexMetrics.GetFirstSolidCorner(direction, isDeep);
Vector3 v2 = center + HexMetrics.GetSecondSolidCorner(direction, isDeep);
//Center Tris
terrain.AddTriangle(center, v1, v2);
terrain.AddTriangleColor(cell.Color);
Vector3 edge = HexMetrics.GetEdge(direction, isDeep);
Vector3 tempV3 = center + HexMetrics.GetFirstEdgeCorner(direction, isDeep);
Vector3 tempV4 = center + HexMetrics.GetSecondEdgeCorner(direction, isDeep);
Vector3 v3 = tempV3 + edge;
Vector3 v4 = tempV4 + edge;
HexCell prevNeighbor = cell.GetNeighbor(direction.Previous()) ?? cell;
HexCell neighbor = cell.GetNeighbor(direction) ?? cell;
HexCell nextNeighbor = cell.GetNeighbor(direction.Next()) ?? cell;
//Edge Elevation
if (cell.Elevation < neighbor.Elevation)
{
v3.y = v4.y = neighbor.Position.y;
}
//Edge Terrace Quads & Quads
if (isDeep && neighbor.Elevation == ElevationLevel.Flat)
{
TriangulateEdgeTerraces(v1, v2, cell, v3, v4, neighbor);
}
else if (isDeep && neighbor.Elevation != ElevationLevel.Flat &&
cell.Elevation < neighbor.Elevation)
{
terrain.AddQuad(v1, v2, v3, v4);
terrain.AddQuadColor(neighbor.Color);
}
else
{
terrain.AddQuad(v1, v2, v3, v4);
terrain.AddQuadColor(cell.Color);
}
Vector3 v5 = center + HexMetrics.GetFirstCorner(direction);
Vector3 v6 = center + HexMetrics.GetSecondCorner(direction);
//Vertice Elevation Change
if (cell.Elevation < neighbor.Elevation)
{
v5.y = v6.y = neighbor.Position.y;
}
if (cell.Elevation < nextNeighbor.Elevation)
{
if (nextNeighbor.Elevation < neighbor.Elevation)
{
v6.y = neighbor.Position.y;
}
else
{
v6.y = nextNeighbor.Position.y;
}
}
if (cell.Elevation < prevNeighbor.Elevation)
{
if (prevNeighbor.Elevation < neighbor.Elevation)
{
v5.y = neighbor.Position.y;
}
else
{
v5.y = prevNeighbor.Position.y;
}
}
//Corner Tris & Corner Terrace Tris
if (isDeep)
{
if (neighbor.Elevation == ElevationLevel.Flat)
{
TriangulateCornerTerraces(v1, cell, v5, v3, neighbor);
TriangulateCornerTerraces(v2, cell, v4, v6, neighbor);
}
else if (cell.Elevation == neighbor.Elevation)
{
if (nextNeighbor.Elevation == ElevationLevel.Flat &&
prevNeighbor.Elevation == ElevationLevel.Flat)
{
TriangulateOuterCornerTerraces(v5, cell, v3, v1, prevNeighbor);
TriangulateOuterCornerTerraces(v6, cell, v2, v4, nextNeighbor);
}
else if (nextNeighbor.Elevation == ElevationLevel.Flat)
{
TriangulateOuterCornerTerraces(v6, cell, v2, v4, nextNeighbor);
terrain.AddTriangle(v1, v5, v3);
if (cell.Elevation < prevNeighbor.Elevation)
{
terrain.AddTriangleColor(prevNeighbor.Color);
}
else
{
terrain.AddTriangleColor(cell.Color);
}
}
else if (prevNeighbor.Elevation == ElevationLevel.Flat)
{
TriangulateOuterCornerTerraces(v5, cell, v3, v1, prevNeighbor);
terrain.AddTriangle(v2, v4, v6);
if (cell.Elevation < nextNeighbor.Elevation)
{
terrain.AddTriangleColor(nextNeighbor.Color);
}
else
{
terrain.AddTriangleColor(cell.Color);
}
}
else if (cell.Elevation < nextNeighbor.Elevation &&
cell.Elevation < prevNeighbor.Elevation)
{
terrain.AddTriangle(v1, v5, v3);
terrain.AddTriangleColor(prevNeighbor.Color);
terrain.AddTriangle(v2, v4, v6);
terrain.AddTriangleColor(nextNeighbor.Color);
}
else if (cell.Elevation < nextNeighbor.Elevation)
{
terrain.AddTriangle(v1, v5, v3);
terrain.AddTriangleColor(cell.Color);
terrain.AddTriangle(v2, v4, v6);
terrain.AddTriangleColor(nextNeighbor.Color);
}
else if (cell.Elevation < prevNeighbor.Elevation)
{
terrain.AddTriangle(v1, v5, v3);
terrain.AddTriangleColor(prevNeighbor.Color);
terrain.AddTriangle(v2, v4, v6);
terrain.AddTriangleColor(cell.Color);
}
else
{
terrain.AddTriangle(v1, v5, v3);
terrain.AddTriangleColor(cell.Color);
terrain.AddTriangle(v2, v4, v6);
terrain.AddTriangleColor(cell.Color);
}
}
else
{
if (nextNeighbor.Elevation == ElevationLevel.Flat &&
prevNeighbor.Elevation == ElevationLevel.Flat)
{
TriangulateNextCornerTerracesCliff(v6, cell, v2, v4, neighbor, nextNeighbor);
TriangulatePrevCornerTerracesCliff(v5, cell, v3, v1, neighbor, prevNeighbor);
}
else if (nextNeighbor.Elevation == ElevationLevel.Flat)
{
TriangulateNextCornerTerracesCliff(v6, cell, v2, v4, neighbor, nextNeighbor);
terrain.AddTriangle(v1, v5, v3);
terrain.AddTriangleColor(neighbor.Color);
}
else if (prevNeighbor.Elevation == ElevationLevel.Flat)
{
TriangulatePrevCornerTerracesCliff(v5, cell, v3, v1, neighbor, prevNeighbor);
terrain.AddTriangle(v2, v4, v6);
terrain.AddTriangleColor(neighbor.Color);
}
else
{
terrain.AddTriangle(v1, v5, v3);
terrain.AddTriangleColor(neighbor.Color);
terrain.AddTriangle(v2, v4, v6);
terrain.AddTriangleColor(neighbor.Color);
}
}
}
else
{
terrain.AddTriangle(v1, v5, v3);
terrain.AddTriangleColor(cell.Color);
terrain.AddTriangle(v2, v4, v6);
terrain.AddTriangleColor(cell.Color);
}
//Features
if (cell.Elevation == ElevationLevel.Flat)
{
features.AddFeature(cell, (center + v1 + v5) * (1f / 3f));
}
}