Let's say I have 2 cubes; "OuterCube" and "InnerCube". Both are ModelUIElement3D objects. The inner one is .8 scaled on each axis compared to the outer cube which makes it the inner cube. The outer has a rather translucent material so you can see through it easily. Both InnerCube as well as OuterCube both have PreviewMouseDown event handlers. If the user clicks at a place on OuterCube that overlaps InnerCube it's PreviewMouseDown routed event handler gets called and e.handled is set to false. By my understanding, this event should continue being tunneled down to the InnerCube but it isn't. I've tried to do my own hit testing at the viewport but when I RaiseEvent myself for the ModelUIElemenent3D the PreviewMouseDown handler for the viewport get's called again so a stack overflow occurs due to the cycle. My goal is to let my application/model logic determine if mouse clicks should be stopped at the OuterCube or the InnerCube. I know I could create my own events but I would like to use the infrastructure that is there for other features. Please advise.
