/// <summary>
/// Calculate render and physics data.
/// </summary>
public void Calculate(GameWorld world)
{
var clipper = new Clipper();
List <List <IntPoint> > output = new List <List <IntPoint> >();
// Calculate difference
clipper.AddPolygons(Polygons, PolyType.ptSubject);
clipper.AddPolygons(Cavities, PolyType.ptClip);
clipper.AddPolygons(Damage, PolyType.ptClip);
clipper.Execute(ClipType.ctDifference, output, PolyFillType.pftNonZero, PolyFillType.pftNonZero);
Hulls.Clear();
output.ForEach(o =>
{
Vector2[] points = new Vector2[o.Count];
int index = 0;
o.ForEach(p => points[index++] = new Vector2(p.X, p.Y));
Hulls.Add(new Penumbra.Hull(points));
});
// Triangulate background for rendering
{
var triangulation = TerrainHelper.Triangulate(Polygons);
TriangulatedBackgroundVertices = new VertexPositionColor[triangulation.Count * 3];
int index = 0;
for (int i = 0; i < triangulation.Count; ++i)
{
for (int b = 0; b < 3; ++b)
{
TriangulatedBackgroundVertices[index++] = new VertexPositionColor(
new Vector3(triangulation[i][b].X, triangulation[i][b].Y, 0), world.Planet.BackgroundSoilTint);
}
}
}
// Triangulate foreground for rendering
{
var triangulation = TerrainHelper.Triangulate(output);
TriangulatedForegroundVertices = new VertexPositionColor[triangulation.Count * 3];
int index = 0;
for (int i = 0; i < triangulation.Count; ++i)
{
for (int b = 0; b < 3; ++b)
{
TriangulatedForegroundVertices[index++] = new VertexPositionColor(
new Vector3(triangulation[i][b].X, triangulation[i][b].Y, 0), world.Planet.SoilTint);
}
}
}
// Convert to Farseer data
PhysicsOutput.Clear();
output.ForEach(p =>
{
PhysicsOutput.Add(TerrainHelper.PolygonToVertices(p));
});
}