public HitTestResultCallbackWrapper(HitTestResultCallback resultCallback, HitTestResultBehavior behaviorOnResult)
{
this._resultCallback = resultCallback;
this._resultInsertionIndex = 0;
this._results = (List <HitTestResult>)null;
this._onHitFoundBehavior = behaviorOnResult;
this._wrappedResultCallback = new HitTestResultCallback(this.OnResult);
}
internal HitTestResultBehavior RaiseCallback(HitTestResultCallback resultCallback,
HitTestFilterCallback filterCallback,
HitTestResultBehavior lastResult,
double distanceAdjustment)
{
results.Sort(RayHitTestResult.CompareByDistanceToRayOrigin);
for (int i = 0, count = results.Count; i < count; i++)
{
RayHitTestResult result = results[i];
result.SetDistanceToRayOrigin(result.DistanceToRayOrigin + distanceAdjustment);
Viewport2DVisual3D viewport2DVisual3D = result.VisualHit as Viewport2DVisual3D;
if (viewport2DVisual3D != null)
{
Point intersectionPoint;
Visual viewport2DVisual3DChild = viewport2DVisual3D.Visual;
if (viewport2DVisual3DChild != null)
{
if (Viewport2DVisual3D.GetIntersectionInfo(result, out intersectionPoint))
{
// convert the resulting point to visual coordinates
Point visualPoint = Viewport2DVisual3D.TextureCoordsToVisualCoords(intersectionPoint, viewport2DVisual3DChild);
GeneralTransform gt = viewport2DVisual3DChild.TransformToOuterSpace().Inverse;
Point pointOnChild;
if (gt != null && gt.TryTransform(visualPoint, out pointOnChild))
{
HitTestResultBehavior behavior2D = viewport2DVisual3DChild.HitTestPoint(filterCallback,
resultCallback,
new PointHitTestParameters(pointOnChild));
if (behavior2D == HitTestResultBehavior.Stop)
{
return(HitTestResultBehavior.Stop);
}
}
}
}
}
HitTestResultBehavior behavior = resultCallback(results[i]);
if (behavior == HitTestResultBehavior.Stop)
{
return(HitTestResultBehavior.Stop);
}
}
return(lastResult);
}
/// <summary>
/// The HTResult function simply takes the intersection closest to the origin and
/// and stores the intersection info for that closest intersection point.
/// </summary>
/// <param name="rawresult"></param>
/// <returns></returns>
private HitTestResultBehavior HTResult(System.Windows.Media.HitTestResult rawresult)
{
RayHitTestResult rayResult = rawresult as RayHitTestResult;
HitTestResultBehavior hitTestResultBehavior = HitTestResultBehavior.Continue;
// since we're hit testing a viewport3D we should be getting the ray hit test result back
if (rayResult != null)
{
_closestIntersectInfo = GetIntersectionInfo(rayResult);
hitTestResultBehavior = HitTestResultBehavior.Stop;
}
return(hitTestResultBehavior);
}
internal override HitTestResultBehavior HitTestPointInternal(
HitTestFilterCallback filterCallback,
HitTestResultCallback resultCallback,
PointHitTestParameters hitTestParameters)
{
if (_children.Count != 0)
{
double distanceAdjustment;
RayHitTestParameters rayParams =
Camera.RayFromViewportPoint(
hitTestParameters.HitPoint,
Viewport.Size,
BBoxSubgraph,
out distanceAdjustment);
HitTestResultBehavior result = Visual3D.HitTestChildren(filterCallback, rayParams, this);
return(rayParams.RaiseCallback(resultCallback, filterCallback, result, distanceAdjustment));
}
return(HitTestResultBehavior.Continue);
}
internal HitTestResultBehavior RaiseCallback(HitTestResultCallback resultCallback,
HitTestFilterCallback filterCallback,
HitTestResultBehavior lastResult)
{
return(RaiseCallback(resultCallback, filterCallback, lastResult, 0.0 /* distance adjustment */));
}
internal HitTestResultBehavior RaiseCallback(HitTestResultCallback resultCallback,
HitTestFilterCallback filterCallback,
HitTestResultBehavior lastResult,
double distanceAdjustment)
{
results.Sort(RayHitTestResult.CompareByDistanceToRayOrigin);
for(int i = 0, count = results.Count; i < count; i++)
{
RayHitTestResult result = results[i];
result.SetDistanceToRayOrigin(result.DistanceToRayOrigin + distanceAdjustment);
Viewport2DVisual3D viewport2DVisual3D = result.VisualHit as Viewport2DVisual3D;
if (viewport2DVisual3D != null)
{
Point intersectionPoint;
Visual viewport2DVisual3DChild = viewport2DVisual3D.Visual;
if (viewport2DVisual3DChild != null)
{
if (Viewport2DVisual3D.GetIntersectionInfo(result, out intersectionPoint))
{
// convert the resulting point to visual coordinates
Point visualPoint = Viewport2DVisual3D.TextureCoordsToVisualCoords(intersectionPoint, viewport2DVisual3DChild);
GeneralTransform gt = viewport2DVisual3DChild.TransformToOuterSpace().Inverse;
Point pointOnChild;
if (gt != null && gt.TryTransform(visualPoint, out pointOnChild))
{
HitTestResultBehavior behavior2D = viewport2DVisual3DChild.HitTestPoint(filterCallback,
resultCallback,
new PointHitTestParameters(pointOnChild));
if (behavior2D == HitTestResultBehavior.Stop)
{
return HitTestResultBehavior.Stop;
}
}
}
}
}
HitTestResultBehavior behavior = resultCallback(results[i]);
if (behavior == HitTestResultBehavior.Stop)
{
return HitTestResultBehavior.Stop;
}
}
return lastResult;
}
internal HitTestResultBehavior RaiseCallback(HitTestResultCallback resultCallback,
HitTestFilterCallback filterCallback,
HitTestResultBehavior lastResult)
{
return RaiseCallback(resultCallback, filterCallback, lastResult, 0.0 /* distance adjustment */);
}