private static void Z(this IDebugCanvas canvas, IntVector2 visibilityPolygonOrigin, TerrainOverlayNetworkNode terrainNode, IReadOnlyCollection <IntLineSegment2> inboundCrossoverSegments, HashSet <TerrainOverlayNetworkNode> visited, FillStyle fillStyle)
{
canvas.Transform = terrainNode.SectorNodeDescription.WorldTransform;
// canvas.DrawPoint(visibilityPolygonOrigin, StrokeStyle.RedThick25Solid);
var visibilityPolygon = new VisibilityPolygon(
visibilityPolygonOrigin.ToDoubleVector2(),
new[] {
new VisibilityPolygon.IntervalRange {
Id = VisibilityPolygon.RANGE_ID_INFINITESIMALLY_NEAR,
ThetaStart = 0,
ThetaEnd = VisibilityPolygon.TwoPi
},
});
foreach (var inboundCrossoverSegment in inboundCrossoverSegments)
{
visibilityPolygon.ClearBefore(inboundCrossoverSegment);
}
// Console.WriteLine("====");
foreach (var seg in terrainNode.LandPolyNode.FindContourAndChildHoleBarriers())
{
if (GeometryOperations.Clockness(visibilityPolygon.Origin, seg.First.ToDoubleVector2(), seg.Second.ToDoubleVector2()) == Clockness.CounterClockwise)
{
continue;
}
visibilityPolygon.Insert(seg);
// Console.WriteLine(seg);
}
// Console.WriteLine("====");
var visibleCrossoverSegmentsByNeighbor = FindVisibleCrossoverSegmentsByNeighborAndClearLocalAt(canvas, terrainNode, visibilityPolygon, visibilityPolygonOrigin, visited);
canvas.DrawVisibilityPolygon(visibilityPolygon, fillStyle: fillStyle ?? kDefaultFillStyle, angleBoundaryStrokeStyle: StrokeStyle.None, visibleWallStrokeStyle: StrokeStyle.None);
var visibilityPolygonOriginWorld = Vector3.Transform(new Vector3(visibilityPolygonOrigin.ToDotNetVector(), 0), terrainNode.SectorNodeDescription.WorldTransform);
foreach (var(neighbor, nextInboundCrossoverSegments) in visibleCrossoverSegmentsByNeighbor)
{
var neighborPolygonOrigin = Vector3.Transform(visibilityPolygonOriginWorld, neighbor.SectorNodeDescription.WorldTransformInv);
//visibilityPolygonOrigin
Z(canvas, new IntVector2((int)neighborPolygonOrigin.X, (int)neighborPolygonOrigin.Y), neighbor, nextInboundCrossoverSegments,
visited.Concat(new[] { terrainNode }).ToHashSet(), fillStyle);
}
}
private static void RenderVisualizationFrame(DoubleVector2 p, IntLineSegment2[] segments, int eventLimit = -1)
{
var canvas = host.CreateAndAddCanvas(frameCounter++);
var vp = VisibilityPolygon.Create(p, segments, eventLimit);
vp = new VisibilityPolygon(p);
foreach (var seg in segments)
{
vp.Insert(seg);
}
// vp.Insert(new IntLineSegment2(p.LossyToIntVector2() + new IntVector2(50, -20), p.LossyToIntVector2() + new IntVector2(50, 20)));
canvas.BatchDraw(() => {
canvas.DrawVisibilityPolygon(vp, 0, new FillStyle(Color.FromArgb(120, Color.Cyan)));
foreach (var s in segments)
{
canvas.DrawLine(s.First, s.Second, StrokeStyle.BlackHairLineSolid);
}
canvas.DrawPoint(p, StrokeStyle.RedThick5Solid);
});
}