/// <summary>
/// Called when the position input is changed
/// </summary>
/// <param name="p">The new location point</param>
/// <param name="didSnap">Information on point snapping</param>
/// <returns>true, if point is accepted</returns>
bool OnSetPosition(GeoPoint p, SnapPointFinder.DidSnapModes didSnap)
{
location = p;
// default vectors for the two sides of the bitmap
GeoVector dirWidth = ActiveDrawingPlane.DirectionX;
GeoVector dirHeight = ActiveDrawingPlane.DirectionY;
if (didSnap == SnapPointFinder.DidSnapModes.DidSnapToFaceSurface)
{ // if there was a snap on the surface of a face we want to center the picture object
// there. We also want to make it parallel to the surface at this point and stand upright.
Face fc = base.LastSnapObject as Face; // this object was involved in the snapping
if (fc != null) // should always be the case
{
GeoPoint2D pos = fc.Surface.PositionOf(location); // position in the surface u/v system
GeoVector normal = fc.Surface.GetNormal(pos); // normal vector at this position
Projection projection = base.CurrentMouseView.Projection; // the projection of the view
if (projection != null)
{ // make sure that the normal vector points away from the user.
// On faces not in a solid both sides of the face are displayed and you don't know
// on which side you are
if (projection.Direction * normal < 0.0)
{
normal = -normal;
}
}
location = location - 0.001 * normal.Normalized; // moves the location point a little bit
// in the direction of the normal vector to the user so
// that the bitmap hovers a little above the surface to avoid display artefacts
if (Precision.SameDirection(normal, GeoVector.ZAxis, false))
{ // the surface is parallel to the x/y plane: orient the bitmap to the x/y axis
dirWidth = GeoVector.XAxis;
dirHeight = GeoVector.YAxis;
}
else
{ // some arbitrary surface direction: calculate the base direction of the bitmap to
// be parallel to the x/y plane and the up direction rectangular to the base and the normal.
// this makes the bitmap appear upright (in the sense of the z-axis)
dirWidth = normal ^ GeoVector.ZAxis;
dirHeight = dirWidth ^ normal;
dirWidth.Norm(); // we need normalized vectors
dirHeight.Norm();
}
// picture.Location = location - 0.5 * widthValue * dirWidth - 0.5 * heightValue * dirHeight;
picture.Location = location;
}
}
else
{
picture.Location = location;
}
// provide the picture object with proper aspect ratio and scaling according to the scaling factor
picture.DirectionWidth = widthValue * dirWidth;
picture.DirectionHeight = heightValue * dirHeight;
// set the location of the object so that the center of the bitmap occures at the position of location
// Since picture.Location is the lower left point of the object we must move it left and down
// with half of it's size
// diagonalPointDist = Geometry.Dist(picture.Location, picture.Location + picture.DirectionWidth + picture.DirectionHeight);
return(true); // this was OK
}
private bool SetFacePoint(GeoPoint p, SnapPointFinder.DidSnapModes didSnap)
{
if (didSnap == SnapPointFinder.DidSnapModes.DidSnapToFaceSurface)
{
Face f = base.LastSnapObject as Face;
if (f != null)
{
GeoPoint2D p2d = f.Surface.PositionOf(p);
faceVector = -f.Surface.GetNormal(p2d);
selectDir();
return(true);
}
}
using (Frame.Project.Undo.ContextFrame(this))
{
if (vectorProperty != null)
{
vectorProperty.SetGeoVector(cancelVector);
}
}
actualVector = cancelVector;
return(false);
}
