private void Window_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
// Get the mouse in screen space.
Point pt = e.GetPosition(Renderer.Viewport3D);
// Obtain the Visual3D objects under the mouse pointer.
var result = VisualTreeHelper.HitTest(Renderer.Viewport3D, pt);
var resultMesh = result as RayMeshGeometry3DHitTestResult;
if (resultMesh == null)
{
return;
}
// Look up the display from all those rendered.
dDragging = Renderer.GetDisplay(resultMesh.VisualHit as ModelVisual3D);
indexDragging = -1;
// Find the index of the closest corner in that display.
if (dDragging != null)
{
indexDragging = dDragging.FindClosestCornerIndex(Renderer.TransformToViewport(pt), 0.3);
}
// If we have a corner, update the homography.
if (indexDragging != -1)
{
dDragging[indexDragging] = Renderer.TransformToViewport(pt);
}
// Capture the mouse.
CaptureMouse();
}
private void Window_MouseMove(object sender, MouseEventArgs e)
{
// If the mouse is captured and we are already dragging.
if (IsMouseCaptured && (dDragging != null && indexDragging != -1))
{
// Get the mouse point and update the homography.
Point ptMouse = e.GetPosition(Renderer.Viewport3D);
dDragging[indexDragging] = Renderer.TransformToViewport(ptMouse);
}
}
