public void UpdateEdgeIndices(PolygonEdge ignoreEdge)
{
// All of our edges need to update their indices to us
foreach (var edge in this.Edges)
{
if (edge == ignoreEdge)
{
continue;
}
edge.UpdateIndices(this);
}
}
public void ReplaceEdgesWithPolygon(CompositionPolygon replacement, PolygonEdge ignoreEdge)
{
// This polygon is going away as it was merged with another
// All edges this polygon referenced will need to reference the replacement instead
foreach (var edge in this.Edges)
{
if (edge == ignoreEdge)
{
continue;
}
Assert.IsFalse(edge.MajorPartner == this && edge.MinorPartner == this);
if (edge.MajorPartner == this)
{
edge.ReplaceMajor(replacement);
}
else if (edge.MinorPartner == this)
{
edge.ReplaceMinor(replacement);
}
}
}
public void Initialize(List <Vector2[]> polygons)
{
this.PolygonEdges = new List <PolygonEdge>();
int polygonId = 0;
foreach (var polygon in polygons)
{
// Our polygon will be added to each edge
CompositionPolygon compPolygon = new CompositionPolygon(polygon, polygonId++);
// Process all edges of the polygon
for (int p = polygon.Length - 1, q = 0; q < polygon.Length; p = q++)
{
Vector2 P = polygon[p];
Vector2 Q = polygon[q];
// The clockwise edge may already exist if it was added by an earlier polygon as the counter-clockwise edge
// If so, add this polygon as the CW partner of that edge
PolygonEdge edge = this.PolygonEdges.FirstOrDefault(e => e.P == Q && e.Q == P);
if (edge != null)
{
// Add ourselves as the Minor/CW partner
edge.AssignMinorPartner(compPolygon);
compPolygon.AddEdge(edge);
}
else
{
// If this edge is new to the collection then add it with this polygon being the CCW partner
PolygonEdge newEdge = new PolygonEdge(compPolygon, p);
compPolygon.AddEdge(newEdge);
this.PolygonEdges.Add(newEdge);
}
}
}
}
public void AddEdge(PolygonEdge edge)
{
this.Edges.Add(edge);
}