private void PolygonCutterViewer_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left && PolygonCutterViewer.SelectedPolygonTriangle.SelectionType != PolygonTriangle.SelectionTypes.None &&
SelectionChoice == SelectionChoices.Move)
{
PolygonTriangle SelectedPolygonTriangle = PolygonCutterViewer.SelectedPolygonTriangle;
#region Move
Polygon ActivePolygon = SelectedPolygonTriangle.ActivePolygon;
if (SelectedPolygonTriangle.SelectionType == PolygonTriangle.SelectionTypes.Vertex)// Move Vertex.
{
ReplaceVertexIndex = -1;
if (Control.ModifierKeys == Keys.Alt)//Snap to closest vertex.
{
double MinDistanceToVertex = 5;
for (int V = 0; V < ActivePolygon.ArrayVertex.Length; V++)
{
if (V == SelectedPolygonTriangle.VertexIndex)
{
continue;
}
double DistanceToVertexX = e.X - ActivePolygon.ArrayVertex[V].X;
double DistanceToVertexY = e.Y - ActivePolygon.ArrayVertex[V].Y;
double DistanceToVertex = Math.Sqrt(Math.Pow(DistanceToVertexX, 2) + Math.Pow(DistanceToVertexY, 2));
if (DistanceToVertex < MinDistanceToVertex)
{
MinDistanceToVertex = DistanceToVertex;
ReplaceVertexIndex = V;
}
}
}
if (ReplaceVertexIndex >= 0)
{
ActivePolygon.ArrayVertex[SelectedPolygonTriangle.VertexIndex].X = ActivePolygon.ArrayVertex[ReplaceVertexIndex].X;
ActivePolygon.ArrayVertex[SelectedPolygonTriangle.VertexIndex].Y = ActivePolygon.ArrayVertex[ReplaceVertexIndex].Y;
ActivePolygon.UpdateWorldPosition(Vector2.Zero, 0f);
}
else
{
ActivePolygon.ArrayVertex[SelectedPolygonTriangle.VertexIndex].X = e.X;
ActivePolygon.ArrayVertex[SelectedPolygonTriangle.VertexIndex].Y = e.Y;
ActivePolygon.UpdateWorldPosition(Vector2.Zero, 0f);
}
}
else//Move Polygon
{
SelectedPolygonTriangle.Move(e.X - MouseEventOld.X, e.Y - MouseEventOld.Y);
}
#endregion
}
else
{
PolygonCutterViewer.SelectedPolygonTriangle.SelectionType = PolygonTriangle.SelectionTypes.None;
for (int P = PolygonCutterViewer.ListPolygon.Count - 1; P >= 0; --P)
{
Polygon ActivePolygon = PolygonCutterViewer.ListPolygon[P];
Vector2 MousePosition = new Vector2(e.X, e.Y);
PolygonTriangle PolygonResult = ActivePolygon.PolygonCollisionWithMouse(e.X, e.Y);
if (PolygonResult.SelectionType != PolygonTriangle.SelectionTypes.None)
{
PolygonCutterViewer.SelectedPolygonTriangle = PolygonResult;
}
}
switch (SelectionChoice)
{
case SelectionChoices.SplitPolygon:
PolygonCutterViewer.SplittingPoint2 = new Vector2(e.X, e.Y);
break;
}
}
if (Control.ModifierKeys == Keys.Control && PolygonCutterViewer.SelectedPolygonTriangle != null)
{
PolygonCutterViewer.SelectedPolygonTriangle.SelectionType = PolygonTriangle.SelectionTypes.Polygon;
}
MouseEventOld = e;
}
