public void LeftMouseDown(MouseButtonEventArgs e, Visual3D[] ignoreVisuals)
{
// Fire a ray at the mouse point
Point clickPoint = e.GetPosition(_visual);
RayHitTestParameters clickRay;
List <MyHitTestResult> hits = UtilityWPF.CastRay(out clickRay, clickPoint, _visual, _camera, _viewport, true, ignoreVisuals);
// See if they clicked on something
var clickedItem = GetHit(hits);
if (clickedItem != null)
{
ChangeSelectedItem(clickedItem, clickPoint);
}
else
{
UnselectItem();
}
// Update the drag plane
ChangeDragPlane(clickRay);
}
private void grdViewPort_MouseDown(object sender, MouseButtonEventArgs e)
{
const double CLICKDISTANCE = BOUNDRYSIZE / 8;
try
{
if (e.ChangedButton != MouseButton.Left)
{
// All the special logic in this method is for the left button
return;
}
// Fire a ray at the mouse point
Point clickPoint2D = e.GetPosition(grdViewPort);
RayHitTestParameters clickRay;
List <MyHitTestResult> hits = UtilityWPF.CastRay(out clickRay, clickPoint2D, _viewport, _camera, _viewport, false);
// Figure out where to place the point
Point3D clickPoint3D;
ITriangle clickPlane = null;
if (hits != null && hits.Count > 0)
{
// They clicked on something, so use that
clickPoint3D = hits[0].Point;
}
else
{
//TODO: If there is a mothership, choose a point in a plane that goes through it (orth to the click ray)
//
// If there isn't, but they click near a swarm, use that plane
//
// Or if they click near something (like an asteroid)
double?clickDistNearSwarm = GetClickDistanceNearSwarm(clickRay);
double clickDist;
if (clickDistNearSwarm == null)
{
clickDist = Math.Max(CLICKDISTANCE, _camera.Position.ToVector().Length / 1.1);
}
else
{
clickDist = clickDistNearSwarm.Value;
}
clickPoint3D = clickRay.Origin + clickRay.Direction.ToUnit() * clickDist;
}
// Update the click plane
if (clickPlane == null)
{
Vector3D standard = Math3D.GetArbitraryOrhonganal(clickRay.Direction);
Vector3D orth = Vector3D.CrossProduct(standard, clickRay.Direction);
clickPlane = new Triangle(clickPoint3D, clickPoint3D + standard, clickPoint3D + orth);
}
// Store the point and plane
_strokes.AddPointToStroke(clickPoint3D);
_clickPlane = clickPlane;
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), this.Title, MessageBoxButton.OK, MessageBoxImage.Error);
}
}