Unigine.PhysicalTrigger Class

using System;
using System.Collections;
using System.Collections.Generic;
using Unigine;
using System.Linq;
using System.Text;

#region Math Variables
#if UNIGINE_DOUBLE
using Scalar = System.Double;
using Vec2 = Unigine.dvec2;
using Vec3 = Unigine.dvec3;
using Vec4 = Unigine.dvec4;
using Mat4 = Unigine.dmat4;
#else
using Scalar = System.Single;
using Vec2 = Unigine.vec2;
using Vec3 = Unigine.vec3;
using Vec4 = Unigine.vec4;
using Mat4 = Unigine.mat4;
using WorldBoundBox = Unigine.BoundBox;
using WorldBoundSphere = Unigine.BoundSphere;
using WorldBoundFrustum = Unigine.BoundFrustum;
#endif
#endregion

[Component(PropertyGuid = "AUTOGENERATED_GUID")] // <-- this line is generated automatically for a new component
public class name : Component
{
	PhysicalTrigger trigger;
	ObjectMeshDynamic box1;
	ObjectMeshDynamic box2;
	
	// callback function to be fired when a physical object enters the trigger
	private void trigger_enter(Body body)
	{
		// trying to get an object from the body
		Unigine.Object obj = body.Object;
		if (!obj)
			return;
		
		// enabling material emission for all object's surfaces
		for (int i = 0; i < obj.NumSurfaces; i++)
			obj.SetMaterialState("emission", 1, i);

		// displaying the name of the object entering trigger area
		Log.Message("\n {0} has entered the trigger area!", body.Object.Name);
	}

	// callback function to be fired when a physical object leaves the trigger
	private void trigger_leave(Body body)
	{
		// trying to get an object from the body
		Unigine.Object obj = body.Object;
		if (!obj)
			return;
		
		// disabling material emission for all object's surfaces
		for (int i = 0; i < obj.NumSurfaces; i++)
			obj.SetMaterialState("emission", 0, i);

		// displaying the name of the object leaving trigger area
		Log.Message("\n {0} has left the trigger area!", body.Object.Name);
	}

	/// function, creating a named box having a specified size, color and transformation with a body and a shape
	ObjectMeshDynamic createBodyBox(String name, vec3 size, float mass, vec4 color, Mat4 transform, int physical_mask)
	{
		// creating geometry and setting up its parameters (name, material and transformation)
		ObjectMeshDynamic OMD = Primitives.CreateBox(size);
		OMD.WorldTransform = transform;
		OMD.SetMaterialParameterFloat4("albedo_color", color, 0);
		OMD.Name = name;

		// adding physics, i.e. a rigid body and a box shape with specified mass
		BodyRigid body = new BodyRigid(OMD);

		body.AddShape(new ShapeBox(size), MathLib.Translate(new vec3(0.0f)));
		body.PhysicalMask = physical_mask;
		body.Mass = mass;

		return OMD;
	}
	
	private void Init()
	{
		 // enabling visualizer to render bounds of the physical trigger	
            Unigine.Console.Run("show_visualizer 1");
			
			// creating a physical trigger
			trigger = new PhysicalTrigger(Shape.TYPE.SHAPE_BOX,new vec3(2.0f, 2.0f, 1.0f));

			// setting trigger's position
			trigger.Position = new Vec3(0.0f, 0.0f, 1.0f);

			// setting trigger's physical mask equal to 1
			trigger.PhysicalMask = 1;

			// retrieving trigger size
			vec3 size = trigger.Size;
	
			// displaying trigger size and shape type
			Log.Message("\n Trigger parameters size({0}, {1} , {2}) type: {3}", size.x, size.y, size.z, trigger.ShapeType);
	
			// adding trigger enter callback function
			trigger.AddEnterCallback(body => trigger_enter(body));

			// adding trigger leave callback function
			trigger.AddLeaveCallback(body => trigger_leave(body));

			// creating a box with a body and physical mask value equal to 2 to be ignored by the trigger
			box1 = createBodyBox("Box1", new vec3(0.2f), 5.0f, new vec4(1.0f, 0.0f, 0.0f, 1.0f), MathLib.Translate(new Vec3(0.0f, 0.0f, 2.22f)),2);

			// creating a box with a body and physical mask value equal to 1 to affect the trigger
			box2 = createBodyBox("Box2", new vec3(0.2f), 0.0f, new vec4(1.0f, 1.0f, 0.0f, 1.0f), MathLib.Translate(new Vec3(3.5f, 0.0f, 1.2f)),1);

			// displaying physical masks of both boxes and the trigger
			Log.Message("\n Box1 Physical mask: {0}", box1.Body.PhysicalMask);
			Log.Message("\n Box2 Physical mask: {0}", box2.Body.PhysicalMask);
			Log.Message("\n Trigger Physical mask: {0}", trigger.PhysicalMask);
			
	}
	
	private void Update()
	{
		// showing the bounds of the physical trigger
		trigger.RenderVisualizer();

		// changing the position of the second box
		box2.WorldPosition = box2.WorldPosition - new vec3(0.5f * Game.IFps, 0.0f, 0.0f);
			
	}

	private void UpdatePhysics()
	{
		
		// updating information on trigger contacts
		trigger.UpdateContacts();
		
	}
	
	private void Shutdown()
	{
		
		// clearing trigger callbacks
		trigger.ClearEnterCallbacks();
		trigger.ClearLeaveCallbacks();
	}
}