function test_func(vec3)
	-- raise unless vec3.is_a?(Vec3) # TODO: BevyScriptum::Vec3 and add example how to include it globally like Sinatra does
	-- raise unless vec3.x == 1.5
	-- raise unless vec3.y == 2.5
	-- raise unless vec3.z == -3.5
	mark_success()
end