|
public IntersectsWith ( |
||
| rect | ${core_Rectangle2D_method_intersectsWith_param_rect} | |
| return | bool | |
private IList<Point2DCollection> ClipPointCollection(Point2DCollection points, Rectangle2D box)
{
List<Point2DCollection> list = new List<Point2DCollection>();
Rectangle2D rect = points.GetBounds();
if (((rect.Right < box.Left) || (rect.Top < box.Bottom)) || ((rect.Left > box.Right) || (rect.Bottom > box.Top)))
{
return null;
}//全部在外,不相交
if (box.Contains(rect))
{
list.Add(points);
return list;
}//全部在内
if (points.Count < 2)
{
return null;
}
Point2DCollection item = null;
bool flag = box.Contains(points[0]);
if (flag)
{
item = new Point2DCollection();
list.Add(item);
item.Add(points[0]);
}//第一个点在内
for (int i = 0; i < (points.Count - 1); i++)
{
Point2D head = points[i];
Point2D end = points[i + 1];
bool flag2 = box.Contains(end);
if (flag && flag2)
{
item.Add(end);
}//同时在内。那么else则有三种情况,head内end外，head外edn内，hean外end外
else
{
if (flag != flag2)
{
if (flag)
{
item.Add(this.ClipLineSegment(head, end, box));
}//head内end外，添加交点
else
{
item = new Point2DCollection();
list.Add(item);
item.Add(this.ClipLineSegment(head, end, box));
item.Add(end);
}//head外edn内，添加交点和end点
}
else
{
Rectangle2D segmentBox = new Rectangle2D(Math.Min(head.X, end.X), Math.Min(head.Y, end.Y), Math.Max(head.X, end.X), Math.Max(head.Y, end.Y));
if (segmentBox.IntersectsWith(box))
{
item = new Point2DCollection();
list.Add(item);
//与四条边框求交点,在中间就添加上去
Point2D point3 = EdgeIntersection(head, end, box.Left, false);
Point2D point4 = EdgeIntersection(head, end, box.Right, false);
Point2D point5 = EdgeIntersection(head, end, box.Bottom, true);
Point2D point6 = EdgeIntersection(head, end, box.Top, true);
if ((point6.X >= box.Left) && (point6.X <= box.Right))
{
item.Add(point6);
}
if ((point5.X >= box.Left) && (point5.X <= box.Right))
{
item.Add(point5);
}
if ((point4.Y >= box.Bottom) && (point4.Y <= box.Top))
{
item.Add(point4);
}
if ((point3.Y >= box.Bottom) && (point3.Y <= box.Top))
{
item.Add(point3);
}
if (item.Count < 2)
{
list.Remove(item);
}
}//hean外end外，添加两个交点
}
flag = flag2;
}
}
for (int j = list.Count - 1; j >= 0; j--)
{
Point2DCollection pts = list[j];
if (pts.Count < 2)
{
list.RemoveAt(j);
}
}
if (list.Count == 0)
{
return null;
}
return list;
}
private IList<Point2DCollection> ClipPointCollection(Point2DCollection points, Rectangle2D box)
{
List<Point2DCollection> list = new List<Point2DCollection>();
Rectangle2D rect = points.GetBounds();
if (((rect.Right < box.Left) || (rect.Top < box.Bottom)) || ((rect.Left > box.Right) || (rect.Bottom > box.Top)))
{
return null;
}//全部在外
if (((rect.Left >= box.Left) && (rect.Bottom >= box.Bottom)) && ((rect.Right <= box.Right) && (rect.Top <= box.Top)))
{
list.Add(points);
return list;
}//全部在内
if (points.Count < 2)
{
return null;
}
Point2DCollection item = null;
bool flag = IsWithin(points[0], box);
if (flag)
{
item = new Point2DCollection();
list.Add(item);
item.Add(points[0]);
}
for (int i = 0; i < (points.Count - 1); i++)
{
Point2D point = points[i];
Point2D p = points[i + 1];
bool flag2 = IsWithin(p, box);
if (flag && flag2)
{
item.Add(p);
}
else
{
if (flag != flag2)
{
if (flag)
{
item.Add(this.ClipLineSegment(point, p, box));
}
else
{
item = new Point2DCollection();
list.Add(item);
item.Add(this.ClipLineSegment(p, point, box));
item.Add(p);
}
}
else
{
Rectangle2D box3 = new Rectangle2D(Math.Min(point.X, p.X), Math.Min(point.Y, p.Y), Math.Max(point.X, p.X), Math.Max(point.Y, p.Y));
if (box3.IntersectsWith(box))
{
item = new Point2DCollection();
list.Add(item);
Point2D point3 = EdgeIntersection(point, p, box.Left, false);
Point2D point4 = EdgeIntersection(point, p, box.Right, false);
Point2D point5 = EdgeIntersection(point, p, box.Bottom, true);
Point2D point6 = EdgeIntersection(point, p, box.Top, true);
if ((point6.X >= box.Left) && (point6.X <= box.Right))
{
item.Add(point6);
}
if ((point5.X >= box.Left) && (point5.X <= box.Right))
{
item.Add(point5);
}
if ((point4.Y >= box.Bottom) && (point4.Y <= box.Top))
{
item.Add(point4);
}
if ((point3.Y >= box.Bottom) && (point3.Y <= box.Top))
{
item.Add(point3);
}
if (item.Count < 2)
{
list.Remove(item);
}
}
}
flag = flag2;
}
}
for (int j = list.Count - 1; j >= 0; j--)
{
Point2DCollection points3 = list[j];
if (points3.Count < 2)
{
list.RemoveAt(j);
}
}
if (list.Count == 0)
{
return null;
}
return list;
}
private void zoomTo(Rectangle2D bounds, bool skipAnimation)
{
//if (!ConstrainedViewBounds.IsEmpty)
//{
// bounds.Intersect(ConstrainedViewBounds);
//}
if ((!bounds.IsEmpty) && (bounds.Width != 0.0 || bounds.Height != 0.0))
{
Rectangle2D other = this.ViewBounds;
if (other.IsEmpty)
{
this.mapResolution = this.targetResolution = this.ClipResolution(Math.Max(bounds.Width / currentSize.Width, bounds.Height / currentSize.Height));
Point2D center = bounds.Center;
this.origin = new Point2D(center.X - ((currentSize.Width * 0.5) * this.mapResolution), center.Y + ((currentSize.Height * 0.5) * this.mapResolution));
this.LoadLayersInView(false, this.GetFullViewBounds());
}
else if (double.IsNaN(this.mapResolution))
{
this.cacheViewBounds = bounds;
}//终于判断了
else
{
if (!bounds.IntersectsWith(other))
{
skipAnimation = true;
}//有相交的跳过动画
Point2D point2 = bounds.Center;
double nearestLevelResolution = MathUtil.GetNearest(this.ClipResolution(Math.Max(bounds.Width / currentSize.Width, bounds.Height / currentSize.Height)), this.Resolutions, MinResolution, MaxResolution);
bounds = new Rectangle2D(point2.X - ((currentSize.Width * nearestLevelResolution) * 0.5),
point2.Y - ((currentSize.Height * nearestLevelResolution) * 0.5),
point2.X + ((currentSize.Width * nearestLevelResolution) * 0.5),
point2.Y + ((currentSize.Height * nearestLevelResolution) * 0.5));
bounds = getAdjustedViewBounds(bounds, currentSize);
bool pan = DoubleUtil.AreClose(1.0, bounds.Width / other.Width);
if (!pan && (bounds.Width != 0.0 || bounds.Height != 0.0))
{
beginZoomToTargetBounds(bounds, skipAnimation);
}
else
{
//PanTo(bounds.Center, skipAnimation);//pan到这个点的bounds其实
panTo(bounds, skipAnimation);//10/3/12
}
}
}
}
private void beginZoomToTargetBounds(Rectangle2D targetBounds, bool skipAnimation)
#endif
{
//if (!ConstrainedViewBounds.IsEmpty)
//{
// targetBounds.Intersect(ConstrainedViewBounds);
//}
//double width = targetBounds.Width;
//double height = targetBounds.Height;
//double num4 = this.GetViewSize().Height / GetViewSize().Width;
//if ((height / width) > num4)
//{
// width = height / num4;
//}
//else
//{
// height = width * num4;
//}
//targetBounds = new Rectangle2D
//{
// Left = targetBounds.Center.X - (width / 2.0),
// Bottom = targetBounds.Center.Y - (height / 2.0),
// Right = targetBounds.Center.X + (width / 2.0),
// Top = targetBounds.Center.Y + (height / 2.0)
//};//以上校正bounds
if (this.Layers == null)
{
return;
}
Rectangle2D startBounds = this.ViewBounds;
if (this.previousViewBounds.IsEmpty)
{
this.previousViewBounds = startBounds;
}
double startResolution = this.mapResolution;
if (((targetBounds.Width != 0.0) || (targetBounds.Height != 0.0)) && (!targetBounds.IsEmpty))
{
//this.targetResolution = this.ClipResolution(Math.Max((double)(targetBounds.Width / viewSize.Width), (double)(targetBounds.Height / viewSize.Height)));
this.targetResolution = Math.Max((double)(targetBounds.Width / currentSize.Width), (double)(targetBounds.Height / currentSize.Height));
this.targetResolution = MathUtil.GetNearest(this.targetResolution, this.Resolutions, MinResolution, MaxResolution);
Point2D startOrigin = new Point2D(startBounds.Left, startBounds.Top);
Point2D center = targetBounds.Center;
if ((base.ActualHeight == 0.0) || (base.ActualWidth == 0.0))
{
skipAnimation = true;
}
Point2D targetOrigin = new Point2D(targetBounds.Left, targetBounds.Top);
this.Popup.IsOpen = false;
if (this.CurrentZoomAnimationHandler != null)
{
CompositionTarget.Rendering -= this.CurrentZoomAnimationHandler;
this.CurrentZoomAnimationHandler = null;
}
skipAnimation = skipAnimation || (this.ZoomDuration.Ticks == 0L);
if (skipAnimation)
{
this.panHelper.ResetTranslate();
this.SetOriginAndResolution(this.targetResolution, targetOrigin, true);
}
else
{
TimeSpan? startTime = null;
bool resetPan = false;
this.CurrentZoomAnimationHandler = delegate(object s, EventArgs e)
{
RenderingEventArgs args = (RenderingEventArgs)e;
if (!startTime.HasValue)
{
startTime = new TimeSpan?(args.RenderingTime);
}
else
{
double t = args.RenderingTime.TotalMilliseconds - startTime.Value.TotalMilliseconds;
double totalMilliseconds = this.ZoomDuration.TotalMilliseconds;
double num3 = QuinticEaseOut(t, 0.0, 1.0, totalMilliseconds);//动画
this.mapResolution = ((this.targetResolution - startResolution) * num3) + startResolution;
Point2D currentOrigin = new Point2D(((targetOrigin.X - startOrigin.X) * num3) + startOrigin.X, ((targetOrigin.Y - startOrigin.Y) * num3) + startOrigin.Y);
if (t >= totalMilliseconds)
{
CompositionTarget.Rendering -= this.CurrentZoomAnimationHandler;
this.CurrentZoomAnimationHandler = null;
currentOrigin = targetOrigin;
this.mapResolution = this.targetResolution;
this.Dispatcher.BeginInvoke(delegate
{
this.SetOriginAndResolution(this.mapResolution, currentOrigin, true);
#if WINDOWS_PHONE
if (!notDraw)
{
#endif
Rectangle2D rect = this.GetFullViewBounds();
if (rect.IsEmpty)
{
this.LoadLayersInView(false, targetBounds);
}
else
{
this.LoadLayersInView(targetBounds.IntersectsWith(rect), rect);
}
this.RaiseViewBoundsChanged();
#if WINDOWS_PHONE
}
#endif
});
}
else
{
if (!resetPan)
{
this.panHelper.ResetTranslate();
resetPan = true;
}
this.SetOriginAndResolution(this.mapResolution, currentOrigin, false);
if (this.ViewBoundsChanging != null)
{
this.ViewBoundsChanging(this, new ViewBoundsEventArgs(startBounds, this.ViewBounds));
}
this.raisePropertyChanged("ViewBounds");
}
}
};
foreach (Layer layer in this.Layers)
{
layer.Container.PrepareAnimation();
}
CompositionTarget.Rendering += this.CurrentZoomAnimationHandler;
}
foreach (Layer layer in this.Layers)
{
if ((layer.Container != null) && !(layer is TiledLayer))
{
layer.Container.MarkOutdated(!skipAnimation);
}
}
this.zoomThrottleTimer.Action = delegate
{
if (skipAnimation)
{
this.LoadLayersInView(false, targetBounds);
this.RaiseViewBoundsChanged();
}
};
if (this.mapResizeThrottler != null)
{
this.mapResizeThrottler.Cancel();
}
this.zoomThrottleTimer.Invoke();
}
}
//比较计算后bounds和每个bounds的相交
private bool computeIntersectWithAll(Rectangle2D bounds)
{
var boundsCollection = (Layer as ElementsLayer).BoundsCollection.Values;
foreach (Rectangle2D rect in boundsCollection)
{
if (rect != null)
{
if (bounds.IntersectsWith(rect))
{
return true;
}
}
}
foreach (Rectangle2D rect in orignalBounds)
{
if (rect != null)
{
if (bounds.IntersectsWith(rect))
{
return true;
}
}
}
return false;
}