/// <summary>
/// Converts an EdgeCollection to a List of SegmentShape2Ds that make up that EdgeCollection,
/// whether it is an open or closed loop.
/// </summary>
/// <param name="edgeColl">EdgeCollection to be converted to a list of segments</param>
/// <returns>A list of segments that make up the edges in the input EdgeCollection</returns>
private static IEnumerable<SegmentShape2D> _EdgeCollToSegments(EdgeCollection<TileEdge> edgeColl)
{
var segments = new List<SegmentShape2D>();
List<Vector2> simplifiedPolygon = edgeColl.GetSimplifiedPerim();
for (int thisIndex = 1; thisIndex < simplifiedPolygon.Count; thisIndex++)
{
int prevIndex = thisIndex - 1;
var segment = new SegmentShape2D
{
A = simplifiedPolygon[prevIndex],
B = simplifiedPolygon[thisIndex],
};
segments.Add(segment);
}
return segments;
}
ConstructFloorPartitions(this TileMapList tileMaps, Dictionary <TileMap, RID> tileMapToFloorArea2Ds,
PerimeterData perimData)
{
if (tileMaps is null)
{
throw new ArgumentNullException(nameof(tileMaps));
}
if (tileMapToFloorArea2Ds is null)
{
throw new ArgumentNullException(nameof(tileMapToFloorArea2Ds));
}
if (perimData is null)
{
throw new ArgumentNullException(nameof(perimData));
}
var floorArea2DToPolygons = new Dictionary <RID, List <ConvexPolygonShape2D> >();
foreach (TileMap tileMap in tileMaps.Values)
{
RID area2dRID = tileMapToFloorArea2Ds[tileMap];
floorArea2DToPolygons[area2dRID] = new List <ConvexPolygonShape2D>();
Physics2DServer.AreaSetCollisionLayer(area2dRID, LayersFuncs.GetLayersValue(Terrain));
Physics2DServer.AreaSetCollisionMask(area2dRID, LayersFuncs.GetLayersValue(PlayerEntity, NpcEntity));
int maxTileGroups = perimData.GetMaxTileGroup(tileMap);
for (int tileGroup = 0; tileGroup < maxTileGroups; tileGroup++)
{
int maxHoleGroups = perimData.GetMaxHoleGroup(tileMap, tileGroup);
var allPerims = new List <Vector2> [maxHoleGroups];
for (int holeGroup = 0; holeGroup < maxHoleGroups; holeGroup++)
{ //put all perims (outer and hole) from one tile group into a single array of lists (gods help me) for partitioning
EdgeCollection <TileEdge> edgeColl = perimData.GetEdgeCollection(tileMap, tileGroup, holeGroup);
allPerims[holeGroup] = new List <Vector2>(edgeColl.GetSimplifiedPerim());
}
List <ConvexPolygonShape2D> partitionedRectangles = _PartitionPolygonToRectangles(allPerims);
foreach (ConvexPolygonShape2D shape in partitionedRectangles)
{
Physics2DServer.AreaAddShape(area2dRID, shape.GetRid());
GD.PrintS("added shape " + shape.GetRid().GetId() + " to area: " + area2dRID.GetId());
}
floorArea2DToPolygons[area2dRID].AddRange(partitionedRectangles);
}
}
return(floorArea2DToPolygons);
}
/// <summary>
/// Simplifies the outer perim using EdgeCollections simplification algorithm.
/// </summary>
private Vector2[] _SimplifyOuterPerim()
{
var edgeCollection = new EdgeCollection <PolyEdge>();
for (int i = 0; i < this.outerPerimNodes.Count; i++)
{
var thisCoord = new Vector2(this.outerPerimNodes[i].x, this.outerPerimNodes[i].y);
var nextCoord = new Vector2(this.outerPerimNodes[(i + 1) % this.outerPerimNodes.Count].x,
this.outerPerimNodes[(i + 1) % this.outerPerimNodes.Count].y);
if (thisCoord == nextCoord)
{
continue;
}
var polyEdge = new PolyEdge(thisCoord, nextCoord);
edgeCollection.Add(polyEdge);
}
return(edgeCollection.GetSimplifiedPerim().ToArray());
}