internal static void DrawArrow2d(Point start, Point end)
{
Point normal = EdgeIndex.GetLineNormal(start, end);
Point direction = Vector2.Subtract(end, start);
float length = 0;
Vector2.Normalize(direction, out length, out direction);
// this length 20 should probably be a percentage of the line.
direction.X *= 20;
direction.Y *= 20;
Point arrowHeadEnd = Vector2.Subtract(direction, end);
Point arrowHead1 = new Point(arrowHeadEnd.X + (normal.X * 20), arrowHeadEnd.Y + (normal.Y * 20));
Point arrowHead2 = new Point(arrowHeadEnd.X + (normal.X * -20), arrowHeadEnd.Y + (normal.Y * -20));
DrawLine2d(start, end);
DrawLine2d(arrowHead1, end);
DrawLine2d(arrowHead2, end);
}
public override void AddEdge(EdgeIndex edge)
{
var v0 = Mesh.Vertices[edge.i0];
var v1 = Mesh.Vertices[edge.i1];
var e0 = new EDGE();
var e1 = new EDGE();
e0.Opposite = e1;
e1.Opposite = e0;
v0.Edge = e0;
e0.Vertex = v0;
v1.Edge = e1;
e1.Vertex = v1;
Mesh.Edges.Add(e0);
Mesh.Edges.Add(e1);
}
private static void CreateLine <MESH>(IMeshConstructor <MESH> constructor, MeshDescriptor des)
{
constructor.PushEdgeMesh(des.Vertices, des.Edges);
for (int i = 0; i < des.Vertices; i++)
{
Vector2f v = CGAL_GetSkeletonPoint(i);
constructor.AddVertex(v);
}
for (int i = 0; i < des.Edges; i++)
{
EdgeIndex edge = CGAL_GetSkeletonEdge(i);
constructor.AddEdge(edge);
}
int numConnections = CGAL_NumEdgeConnection();
for (int i = 0; i < numConnections; i++)
{
EdgeConnection con = CGAL_GetEdgeConnection(i);
constructor.AddEdgeConnection(con);
}
}
public virtual void AddEdge(EdgeIndex edge)
{
}
public override void AddEdge(EdgeIndex edge)
{
m_mesh.Indices[m_edgeIndex * 2 + 0] = edge.i0;
m_mesh.Indices[m_edgeIndex * 2 + 1] = edge.i1;
m_edgeIndex++;
}
