Event Handling

private NodeTrigger trigger;
private ObjectMeshStatic obj;

// the position event handler
void position_event_handler(NodeTrigger trigger)
{
	Log.Message("Object position has been changed. New position is: {0}\n", trigger.WorldPosition.ToString());
}
// the enabled event handler
void enabled_event_handler(NodeTrigger trigger)
{
	Log.Message("The enabled event handler is {0}\n", trigger.Enabled);
}

private void Init()
{

	// create a mesh
	Mesh mesh = new Mesh();
	mesh.AddBoxSurface("box_0", new vec3(1.0f));
	// create a node (e.g. an instance of the ObjectMeshStatic class)
	obj = new ObjectMeshStatic("core/meshes/box.mesh");
	// change material albedo color
	obj.SetMaterialParameterFloat4("albedo_color", new vec4(1.0f, 0.0f, 0.0f, 1.0f), 0);
	// create a trigger node
	trigger = new NodeTrigger();
	
	// add it as a child to the static mesh
	obj.AddWorldChild(trigger);

	// add the enabled event handler to be executed when the node is enabled/disabled
	trigger.EventEnabled.Connect(enabled_event_handler);
	// add the position event handler to be executed when the node position is changed
	trigger.EventPosition.Connect(position_event_handler);

}

private void Update()
{

	float time = Game.Time;
	Vec3 pos = new Vec3(MathLib.Sin(time) * 2.0f, MathLib.Cos(time) * 2.0f, 0.0f);
	// change the enabled flag of the node
	obj.Enabled = pos.x > 0.0f || pos.y > 0.0f;
	// change the node position
	obj.WorldPosition = pos;

}

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

#if UNIGINE_DOUBLE
using Vec3 = Unigine.dvec3;
using Vec4 = Unigine.dvec4;
using Mat4 = Unigine.dmat4;
#else
using Vec3 = Unigine.vec3;
using Vec4 = Unigine.vec4;
using Mat4 = Unigine.mat4;
#endif

[Component(PropertyGuid = "AUTOGENERATED_GUID")] // <-- this line is generated automatically for a new component
public class EventHandlers : Component
{
		// implement the Enter event handler
		void enter_event_handler(Node node)
		{
			Log.Message("\nA node named {0} has entered the trigger\n", node.Name);
		}
		// implement the Leave event handler
		void leave_event_handler(Node node)
		{
			Log.Message("\nA node named {0} has left the trigger\n", node.Name);
		}
		WorldTrigger trigger;
		EventConnection enter_event_connection;
	
	private void Init()
	{
		// create a world trigger
		trigger = new WorldTrigger(new vec3(3.0f));
		// subscribe for the enter event with a handler to be executed when a node enters the world trigger
		// and keep its connection to be used to unsubscribe when necessary
		enter_event_connection = trigger.EventEnter.Connect(enter_event_handler);
		// add the leave event handler to be executed when a node leaves the world trigger
		trigger.EventLeave.Connect(leave_event_handler);
	}

	private void Update()
	{
	}

	private void Shutdown()
	{
		// removing the subscription for the Enter event by using the connection (enter_event_connection)
		enter_event_connection.Disconnect();
	}
}

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

#if UNIGINE_DOUBLE
using Vec3 = Unigine.dvec3;
using Vec4 = Unigine.dvec4;
using Mat4 = Unigine.dmat4;
#else
using Vec3 = Unigine.vec3;
using Vec4 = Unigine.vec4;
using Mat4 = Unigine.mat4;
#endif

[Component(PropertyGuid = "AUTOGENERATED_GUID")] // <-- this line is generated automatically for a new component
public class EventHandlers : Component
{
	
	private void Init()
	{
		// get the system GUI
		Gui gui = Gui.GetCurrent();

		// create a button widget and set its caption
		WidgetButton widget_button = new WidgetButton(gui, "Press me");

		// rearrange a button size
		widget_button.Arrange();

		// set a button position
		widget_button.SetPosition(10,10);

		// set a lambda function to handle the CLICKED event
		widget_button.EventClicked.Connect(() => Log.Message("Button pressed\n"));

		// add the created button widget to the system GUI
		gui.AddChild(widget_button, Gui.ALIGN_OVERLAP | Gui.ALIGN_FIXED);
	}
}

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

#if UNIGINE_DOUBLE
using Vec3 = Unigine.dvec3;
using Vec4 = Unigine.dvec4;
using Mat4 = Unigine.dmat4;
#else
using Vec3 = Unigine.vec3;
using Vec4 = Unigine.vec4;
using Mat4 = Unigine.mat4;
#endif

[Component(PropertyGuid = "AUTOGENERATED_GUID")] // <-- this line is generated automatically for a new component
public class EventHandlers : Component
{
		EventConnections body_event_connections = new EventConnections();
	
	private void Init()
	{
		// create a box
		ObjectMeshStatic meshStatic = new ObjectMeshStatic("core/meshes/box.mesh");
		meshStatic.Position = new Vec3(0, 0, 5.0f);

		// add a rigid body to the box
		BodyRigid body = new BodyRigid(meshStatic);

		// subscribe for body events by using lambda functions and storing connections to remove them later
		body.EventFrozen.Connect(body_event_connections, b => b.Object.SetMaterialParameterFloat4("albedo_color", new vec4(1.0f, 0.0f, 0.0f, 1.0f), 0));
		body.EventPosition.Connect(body_event_connections, b => b.Object.SetMaterialParameterFloat4("albedo_color", new vec4(0.0f, 0.0f, 1.0f, 1.0f), 0));
		body.EventContactEnter.Connect(body_event_connections, (b, num) => b.Object.SetMaterialParameterFloat4("albedo_color", new vec4(1.0f, 1.0f, 0.0f, 1.0f), 0));

		// add a shape to the body
		ShapeBox shape = new ShapeBox(body, new vec3(1.0f));
	}
	private void Shutdown()
	{
		// removing all previously stored event subscriptions for the body
		body_event_connections.DisconnectAll();
	}
}

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

#if UNIGINE_DOUBLE
using Vec3 = Unigine.dvec3;
using Vec4 = Unigine.dvec4;
using Mat4 = Unigine.dmat4;
#else
using Vec3 = Unigine.vec3;
using Vec4 = Unigine.vec4;
using Mat4 = Unigine.mat4;
#endif

[Component(PropertyGuid = "AUTOGENERATED_GUID")] // <-- this line is generated automatically for a new component
public class EventHandlers : Component
{
		void node_property_added(Node n, Property property)
		{
			Log.Message("Property \"{0}\" was added to the node named \"{1}\".\n", property.Name, n.Name);
		}
		void parameter_changed(Property property, int num)
		{
			Log.Message("Parameter \"{0}\" of the property \"{1}\" has changed its value.\n", property.GetParameterPtr(num).Name, property.Name);
		}
		public void property_removed(Property property)
		{
			Log.Message("Property \"{0}\" was removed.\n", property.Name);
		}
	
	private void Init()
	{
		NodeDummy node = new NodeDummy();

		// search for a property named "new_property_0"
		Property property = Properties.FindProperty("new_property_0");
		
		// subscribing for the PropertyNodeAdd event to handle adding a property to a node
		Node.EventPropertyNodeAdd.Connect(node_property_added);

		// add the property named "new_property_0" to the node
		node.AddProperty("new_property_0");
		// subscribing for the ParameterChange event to handle changing property parameter
		property.EventParameterChanged.Connect(parameter_changed);

		// change the value of the "my_int_param" parameter
		property.GetParameterPtr("my_int_param").SetValue(3);
		// inherit a new property named "new_property_1" from the base property "surface_base"
		Properties.FindManualProperty("surface_base").Inherit("new_property_1");

		// subscribing for property removal event
		Properties.EventRemoved.Connect(property_removed);

		// remove the property named "new_property_1"
		Properties.RemoveProperty(Properties.FindProperty("new_property_1").GUID);
	}
}