public MouseMove3DEventArgs(object source, HitTestResult hitTestResult, Point position, Viewport3DX viewport = null)
: base(GeometryModel3D.MouseMove3DEvent, source, hitTestResult, position, viewport)
{ }
/// <summary>
/// Checks if the ray hits the geometry of the model.
/// If there a more than one hit, result returns the hit which is nearest to the ray origin.
/// </summary>
/// <param name="rayWS">Hitring ray from the camera.</param>
/// <param name="result">results of the hit.</param>
/// <returns>True if the ray hits one or more times.</returns>
public virtual bool HitTest(Ray rayWS, ref List<HitTestResult> hits)
{
if (this.Visibility == Visibility.Collapsed)
{
return false;
}
if (this.IsHitTestVisible == false)
{
return false;
}
var g = this.Geometry as MeshGeometry3D;
var h = false;
var result = new HitTestResult();
result.Distance = double.MaxValue;
if (g != null)
{
var m = this.modelMatrix;
// put bounds to world space
var b = BoundingBox.FromPoints(this.Geometry.Positions.Select(x => Vector3.TransformCoordinate(x, m)).ToArray());
//var b = this.Bounds;
// this all happens now in world space now:
if (rayWS.Intersects(ref b))
{
foreach (var t in g.Triangles)
{
float d;
var p0 = Vector3.TransformCoordinate(t.P0, m);
var p1 = Vector3.TransformCoordinate(t.P1, m);
var p2 = Vector3.TransformCoordinate(t.P2, m);
if (Collision.RayIntersectsTriangle(ref rayWS, ref p0, ref p1, ref p2, out d))
{
if (d < result.Distance)
{
result.IsValid = true;
result.ModelHit = this;
// transform hit-info to world space now:
result.PointHit = (rayWS.Position + (rayWS.Direction * d)).ToPoint3D();
result.Distance = d;
var n = Vector3.Cross(p1 - p0, p2 - p0);
n.Normalize();
// transform hit-info to world space now:
result.NormalAtHit = n.ToVector3D();// Vector3.TransformNormal(n, m).ToVector3D();
}
h = true;
}
}
}
}
if (h)
{
result.IsValid = h;
hits.Add(result);
}
return h;
}
public Mouse3DEventArgs(RoutedEvent routedEvent, object source, HitTestResult hitTestResult, Point position, Viewport3DX viewport = null)
: base(routedEvent, source)
{
this.HitTestResult = hitTestResult;
this.Position = position;
this.Viewport = viewport;
}
public MouseMove3DEventArgs(object source, HitTestResult hitTestResult, Point position, Viewport3DX viewport = null)
: base(GeometryModel3D.MouseMove3DEvent, source, hitTestResult, position, viewport)
{
}