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+--- Thread: Hit test everything under the mouse pointer. (/showthread.php?tid=4057)
Hit test everything under the mouse pointer. - tim.rutter - 11-29-2017
I have a view in which I create points - these are actually PlaneVisual3D objects with bitmaps that are rotated to always face the camera. I have enabled mouse events on these planes using the VisualEventSource3D class and use the mouse over event to change the color and mouse click event to show a context menu for the point. The problem I have is that when there are many points on top of each other I want to show a separate popup to allow the user to select the point they are interested in. To do this I need to perform a hit test to find all the points under the mouse pointer. Could you tell me if there is any utility in the PowerToys library to achieve this?
Thanks
RE: Hit test everything under the mouse pointer. - abenedik - 11-29-2017
This is not supported by EventManager3D.
But you can achieve this by using standard WPF 3D hit-testing where you specify a callback method that is called on each hit object - in this method you can specify if hit testing can stop or is continued. When you continue hit testing you can get all the hit objects.
See more here:
https://blogs.msdn.microsoft.com/wpf3d/2009/05/18/3d-hit-testing/