private void TriangulateCorner(Vector3 bottom, HexObject bottomCell, Vector3 left, HexObject leftCell, Vector3 right, HexObject rightCell)
{
HexEdgeType leftEdgeType = bottomCell.GetEdgeType(leftCell);
HexEdgeType rightEdgeType = bottomCell.GetEdgeType(rightCell);
if (leftEdgeType == HexEdgeType.Slope)
{
if (rightEdgeType == HexEdgeType.Slope)
{
TriangulateCornerTerraces(bottom, bottomCell, left, leftCell, right, rightCell);
}
else if (rightEdgeType == HexEdgeType.Flat)
{
TriangulateCornerTerraces(left, leftCell, right, rightCell, bottom, bottomCell);
}
else
{
TriangulateCornerTerracesCliff(bottom, bottomCell, left, leftCell, right, rightCell);
}
}
else if (rightEdgeType == HexEdgeType.Slope)
{
if (leftEdgeType == HexEdgeType.Flat)
{
TriangulateCornerTerraces(right, rightCell, bottom, bottomCell, left, leftCell);
}
else
{
TriangulateCornerCliffTerraces(bottom, bottomCell, left, leftCell, right, rightCell);
}
}
else if (leftCell.GetEdgeType(rightCell) == HexEdgeType.Slope)
{
if (leftCell.Elevation < rightCell.Elevation)
{
TriangulateCornerCliffTerraces(right, rightCell, bottom, bottomCell, left, leftCell);
}
else
{
TriangulateCornerTerracesCliff(left, leftCell, right, rightCell, bottom, bottomCell);
}
}
else
{
terrain.AddTriangle(bottom, left, right);
terrain.AddTriangleColor(bottomCell.Color, leftCell.Color, rightCell.Color);
}
}
private void TriangulateCornerCliffTerraces(Vector3 begin, HexObject beginCell, Vector3 left, HexObject leftCell, Vector3 right, HexObject rightCell)
{
float b = 1f / (leftCell.Elevation - beginCell.Elevation);
if (b < 0)
{
b = -b;
}
Vector3 boundary = Vector3.Lerp(HexMetrics.Perturb(begin), HexMetrics.Perturb(left), b);
Color boundaryColor = Color.Lerp(beginCell.Color, leftCell.Color, b);
TriangulateBoundaryTriangle(right, rightCell, begin, beginCell, boundary, boundaryColor);
if (leftCell.GetEdgeType(rightCell) == HexEdgeType.Slope)
{
TriangulateBoundaryTriangle(left, leftCell, right, rightCell, boundary, boundaryColor);
}
else
{
terrain.AddTriangleUnperturbed(HexMetrics.Perturb(left), HexMetrics.Perturb(right), boundary);
terrain.AddTriangleColor(leftCell.Color, rightCell.Color, boundaryColor);
}
}
private void TriangulateConnection(HexDirection direction, HexObject cell, EdgeVertices e1)
{
HexObject neighbour = cell.GetNeighbour(direction);
if (neighbour == null)
{
return;
}
Vector3 bridge = HexMetrics.GetBridge(direction);
bridge.y = neighbour.Position.y - cell.Position.y;
EdgeVertices e2 = new EdgeVertices(e1.v1 + bridge, e1.v5 + bridge);
if (cell.HasRiverThroughEdge(direction))
{
if (!cell.IsUnderwater)
{
e2.v3.y = neighbour.StreamBedY;
if (!neighbour.IsUnderwater)
{
TriangulateRiverQuad(e1.v2, e1.v4, e2.v2, e2.v4, cell.RiverSurfaceY, neighbour.RiverSurfaceY, 0.8f, cell.HasIncomingRiver && cell.IncomingRiver == direction);
}
else if (cell.Elevation > neighbour.WaterLevel)
{
TriangulateWaterfallInWater(e1.v2, e1.v4, e2.v2, e2.v4, cell.RiverSurfaceY, neighbour.RiverSurfaceY, neighbour.WaterSurfaceY);
}
}
else if (!neighbour.IsUnderwater && neighbour.Elevation > cell.WaterLevel)
{
TriangulateWaterfallInWater(e2.v4, e2.v2, e1.v4, e1.v2, neighbour.RiverSurfaceY, cell.RiverSurfaceY, cell.WaterSurfaceY);
}
}
if (cell.GetEdgeType(direction) == HexEdgeType.Slope)
{
TriangulateEdgeTerraces(e1, cell, e2, neighbour, cell.HasRoadThroughEdge(direction));
}
else
{
TriangulateEdgeStrip(e1, cell.Color, e2, neighbour.Color, cell.HasRoadThroughEdge(direction));
}
HexObject next = cell.GetNeighbour(direction.Next());
if (direction <= HexDirection.E && next != null)
{
Vector3 v5 = e1.v5 + HexMetrics.GetBridge(direction.Next());
v5.y = next.Position.y;
if (cell.Elevation <= neighbour.Elevation)
{
if (cell.Elevation <= next.Elevation)
{
TriangulateCorner(e1.v5, cell, e2.v5, neighbour, v5, next);
}
else
{
TriangulateCorner(v5, next, e1.v5, cell, e2.v5, neighbour);
}
}
else if (neighbour.Elevation <= next.Elevation)
{
TriangulateCorner(e2.v5, neighbour, v5, next, e1.v5, cell);
}
else
{
TriangulateCorner(v5, next, e1.v5, cell, e2.v5, neighbour);
}
}
}