Video Tutorial: How To Use Physical Triggers to Catch Physical Objects

using System.Collections;
using System.Collections.Generic;
using Unigine;

[Component(PropertyGuid = "AUTOGENERATED_GUID")] // <-- this line is generated automatically for a new component
public class Physical : Component
{
	vec4 color;

	void enter_event_handler(Body body)
	{
		// Remember the material's color and set it to black
		color = body.Object.GetMaterialInherit(0).GetParameterFloat4("albedo_color");
		body.Object.GetMaterialInherit(0).SetParameterFloat4("albedo_color", vec4.BLACK);
	}

	void leave_event_handler(Body body)
	{
		// Restore the previous material's color
		body.Object.GetMaterialInherit(0).SetParameterFloat4("albedo_color", color);
	}

	PhysicalTrigger physicalTrigger;
	void Init()
	{
		// Cast Node to PhysicalTrigger
		physicalTrigger = node as PhysicalTrigger;

		if(physicalTrigger){
			// Subscribe for Enter and Leave events to perform actions 
			// when a body enters or leaves the trigger
			physicalTrigger.EventEnter.Connect(enter_event_handler);
			physicalTrigger.EventLeave.Connect(leave_event_handler);
		}
		
	}
	
	void Update()
	{
		// Render the trigger's volume
		Visualizer.RenderNodeBoundSphere(node, vec4.BLUE);
		
	}
}