private void draw(IsovistPolygon isovistPolygon)
{
double scale = this.getScaleFactor();
this._isovistPolygons.Add(isovistPolygon);
DrawingVisual drawingVisual = new DrawingVisual();
using (DrawingContext drawingContext = drawingVisual.RenderOpen())
{
StreamGeometry sg = new StreamGeometry();
using (StreamGeometryContext sgc = sg.Open())
{
sgc.BeginFigure(this.toPoint(isovistPolygon.BoundaryPoints[0]), true, true);
for (int i = 1; i < isovistPolygon.BoundaryPoints.Length; i++)
{
sgc.LineTo(this.toPoint(isovistPolygon.BoundaryPoints[i]), true, true);
}
}
sg.Freeze();
drawingContext.DrawGeometry(this.fillBrush, new Pen(this.boarderBrush, this.boarderThickness / scale), sg);
Point center = this.toPoint(isovistPolygon.VantagePoint);
var p1 = new Point(center.X - this.centerSize / (2 * scale), center.Y);
var p2 = new Point(center.X + this.centerSize / (2 * scale), center.Y);
drawingContext.DrawLine(new Pen(this.centerBrush, this.centerSize / scale), p1, p2);
}
drawingVisual.Drawing.Freeze();
this._children.Add(drawingVisual);
}
private void mouseLeftButtonDown_GetPolygonalIsovist(object sender, MouseButtonEventArgs e)
{
var point = this._host.InverseRenderTransform.Transform(Mouse.GetPosition(this._host.FloorScene));
UV p = new UV(point.X, point.Y);
Cell cell = this._host.cellularFloor.FindCell(p);
if (cell == null)
{
MessageBox.Show("Pick a point on the walkable field and try again!\n");
return;
}
switch (this._host.IsovistBarrierType)
{
case BarrierType.Visual:
if (cell.VisualOverlapState != OverlapState.Outside)
{
MessageBox.Show("Pick a point outside visual barriers.\nTry again!");
return;
}
break;
case BarrierType.Physical:
if (cell.PhysicalOverlapState != OverlapState.Outside)
{
MessageBox.Show("Pick a point outside physical barriers.\nTry again!");
return;
}
break;
case BarrierType.Field:
if (cell.FieldOverlapState != OverlapState.Inside)
{
MessageBox.Show("Pick a point inside the walkable field.\nTry again!");
return;
}
break;
case BarrierType.BarrierBuffer:
if (cell.BarrierBufferOverlapState != OverlapState.Outside)
{
MessageBox.Show("Pick a point outside barrier buffers.\nTry again!");
return;
}
break;
default:
break;
}
this._children.Clear();
var timer = new System.Diagnostics.Stopwatch();
try
{
timer.Start();
HashSet <UVLine> blocks = this._host.cellularFloor.PolygonalIsovistVisualObstacles(p, this._host.IsovistDepth, this._host.IsovistBarrierType);
BarrierPolygon isovistPolygon = this._host.BIM_To_OSM.IsovistPolygon(p, this._host.IsovistDepth, blocks);
IsovistPolygon newIsovistPolygon = new IsovistPolygon(isovistPolygon.BoundaryPoints, p);
timer.Stop();
this._host.IsovistInformation = new IsovistInformation(IsovistInformation.IsovistType.Polygonal,
timer.Elapsed.TotalMilliseconds, isovistPolygon.GetArea(), isovistPolygon.GetPerimeter());
this.draw(newIsovistPolygon);
}
catch (Exception error0)
{
this._host.IsovistInformation = null;
MessageBox.Show(error0.Message);
}
timer = null;
}
