Scene Picking implementation

[Eideren]

Checking to see if your cursor is above a given mesh is not that straightforward to setup, you'll find three file in the archive below, Picking.cs with the standard c# classes required to set it up, PickingForwardShadingEffect.sdfx and its *.cs file for the shader part of the logic.
You'll need to drop PickingForwardShadingEffect.sdfx and its *.cs in your game's effects directory, create one if it is not already done and add it to your project's *.sdpkg

Usage:

var picking = new PickingGameSystem(Services);
if (picking.IsUnderMouse(myModelComponent))
{
}
// Don't forget to dispose of it once you exit out of the editor you're 
// implementing, or whatever else you might have in mind as it does have some performance impact.
picking.Dispose();

The majority of the implementation is lifted off of Stride's own scene picking system, fixed a couple of issues specific to how games are setup compared to the editor.

This implementation could be fairly easily adapted to handle other locations than just under the mouse cursor if needed

Picking.zip