Shild and Damage Effects (Blender Geometry-Nodes)

A Blender file with Geometry-Nodes (GN) utils to simulate firing guns that affect a mesh (e.g. surface damage, sci-fi shield).

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Requires Blender >=5.0.

The "gun" modifier takes an input geometry and simulates the various effects on it. As we need to modify the input geometry, this group will output both the gun/bullets and a copy of the geometry, so the original one should be hidden/disabled.

Bullets are shot from the position of the main camera, in the same direction it is pointing at.

The accuracy of the simulation depends mainly on the number of sub-steps and target mesh faces count/size. Higher values will give more precise results but will require longer computation time.

Additionally, speed and radius of bullets can also affect results, with lower speed requiring less sub-steps, while smaller radius requires more sub-steps.