/// <summary>
/// Draws a point from the center.
/// </summary>
/// <param name="g"></param>
/// <param name="brush"></param>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="r"></param>
public static void DrawPoint(this Graphics g, VerticePoint p)
{
int drawingStartX = (int)(p.X - p.R);
int drawingStartY = (int)(p.Y - p.R);
g.FillEllipse(p.Brush, drawingStartX, drawingStartY, (int)(2 * p.R), (int)(2 * p.R));
}
public void BuildNextPolygonPart(double x, double y)
{
// frist vertice
if (cachedVertices.Count == 0)
{
var v = new VerticePoint(x, y);
cachedVertices.Add(v);
}
// drawing last cached vertice
drawingModule.DrawPolygonVertices(cachedVertices.Last());
// subsequent vertice
var nextV = new VerticePoint(x, y);
cachedVertices.Add(nextV);
// new edge between last cached and newly created
var e = new Line(cachedVertices[cachedVertices.Count - 2], cachedVertices.Last());
cachedEdges.Add(e);
// draw edge (for now the edge has only one visible vertice)
drawingModule.DrawPolygonEdges(e);
// start moving last vertice
movingVerticeState.Clear();
movingVerticeState.selectedVertice = cachedVertices.Last();
movingVerticeState.GetMoveVectorAndUpdateHitPoint(x, y);
}
/// <summary> /// /// </summary> /// <param name="v"></param> /// <param name="vector"></param> /// <returns>If whole poygon needs to be moved.</returns> public static bool ApplyPolygonConstraitnsAfterVerticeMove(VerticePoint v, (double x, double y) vector)
