/// <summary>
/// Add graph section using polygon, extruded in given direction.
/// Any vertices that already exist are not created but reused.
/// This way new region is connected with the rest of the graph.
/// </summary>
/// <param name="boundingPolygon">Base polygon</param>
/// <param name="extrusionAxis">Extrusion direction</param>
/// <param name="distance">Height of polygon extrusion</param>
/// <param name="keyPoints">Set of 3D points, region is split with.</param>
public void AddFromExtrude(Polygon boundingPolygon, Vector3 extrusionAxis, double distance, List <Vector3> keyPoints)
{
var gridZ = new Grid1d(new Line(boundingPolygon.Start, boundingPolygon.Start + distance * extrusionAxis));
gridZ.SplitAtPoints(keyPoints);
var edgesBefore = GetEdges();
var zCells = gridZ.GetCells();
for (var i = 0; i < zCells.Count; i++)
{
var elevationVector = zCells[i].Domain.Min * extrusionAxis;
var transformedPolygonBottom = boundingPolygon.TransformedPolygon(new Transform(elevationVector));
var grid = CreateGridFromPolygon(transformedPolygonBottom);
SplitGrid(grid, keyPoints);
SplitGridAtIntersectionPoints(boundingPolygon, grid, edgesBefore);
var addedEdges = AddFromGrid(grid, edgesBefore);
AddVerticalEdges(extrusionAxis, zCells[i].Domain.Length, addedEdges);
if (i == zCells.Count - 1)
{
var transformedPolygonTop = boundingPolygon.TransformedPolygon(
new Transform(zCells[i].Domain.Max * extrusionAxis));
grid = CreateGridFromPolygon(transformedPolygonTop);
SplitGrid(grid, keyPoints);
SplitGridAtIntersectionPoints(boundingPolygon, grid, edgesBefore);
AddFromGrid(grid, edgesBefore);
}
}
}