Callbacks

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

using Unigine;

namespace UnigineApp
{
	class UnigineApp
	{
		// world function
		private static Variable runWorldFunction(Variable name, Variable v)
		{
			Log.warning("runWorldFunction({0},{1}): called\n", name.getTypeName(), v.getTypeName());
			Engine engine = Engine.get();

			return engine.runWorldFunction(name, v);
		}

		static void Main(string[] args)
		{
			// export the runWorldFunction() function defined above
			Interpreter.addExternFunction("runWorldFunction", new Interpreter.Function2v(runWorldFunction));

			Wrapper.init();

			AppSystemLogic systemLogic = new AppSystemLogic();
			AppWorldLogic worldLogic = new AppWorldLogic();
			AppEditorLogic editorLogic = new AppEditorLogic();

			Engine engine = Engine.init(Engine.VERSION, args);

			engine.main(systemLogic, worldLogic, editorLogic);

			Engine.shutdown();
		}
	}
}

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

using Unigine;

namespace UnigineApp
{
	class AppWorldLogic : WorldLogic
	{
		public AppWorldLogic()
		{
		}

		public override int init()
		{
			return 1;
		}

		public override int shutdown()
		{
			return 1;
		}

		public override int destroy()
		{
			return 1;
		}

		public override int update()
		{
			/*
			 * Callbacks usage example
			 */
			// call the counter() function of the script (defined below)
			Variable ret = Engine.get().runWorldFunction(new Variable("counter"));
			// print a message depending on the value returned by the counter() script function:
			// print the current value of the counter
			if (ret.getInt() != -1) Log.message("counter is: {0}\n", ret.getInt());
			// print the world name
			if (ret.getInt() == 3) Log.message("\nworld name is: \"{0}\"\n", Engine.get().runWorldFunction(new Variable("engine.world.getName")).getString());
			
		}

		public override int render()
		{
			return 1;
		}

		public override int flush()
		{
			return 1;
		}

		public override int save(Stream stream)
		{
			return 1;
		}

		public override int restore(Stream stream)
		{
			return 1;
		}
	}
}

#include <core/unigine.h>

int callback(int value) {
	
	log.warning("callback(%s) is called\n",typeinfo(value));
	
	return value;
}

void counter() {
	
	for(int i = 0; i < 4; i++) {
		log.warning("counter(): called\n");
		yield i;
	}
	
	return -1;
}

int init() {
	Player player = new PlayerSpectator();
	player.setPosition(Vec3(0.0f,-3.401f,1.5f));
	player.setDirection(Vec3(0.0f,1.0f,-0.4f));
	engine.game.setPlayer(player);

	log.message("\n");
	
	// run the callback() script function via the API runWorldFunction() function
	log.message("result is: %s\n\n",typeinfo(runWorldFunction("callback",10)));
	log.message("result is: %s\n\n",typeinfo(runWorldFunction("callback",vec3(1,2,3))));
	log.message("result is: %s\n\n",typeinfo(runWorldFunction("callback","a string")));
	
	// show a console
	engine.console.setActivity(1);

	return 1;
}

int shutdown() {
	return 1;
}

int update() {
	return 1;
}

runWorldFunction(string,int): called
callback(int: 10): called
result is: int: 10

runWorldFunction(string,vec3): called
callback(vec3: 1 2 3): called
result is: vec3: 1 2 3

runWorldFunction(string,string): called
callback(string: "a string"): called
result is: string: "a string"

counter(): called
counter is: 0
counter(): called
counter is: 1
counter(): called
counter is: 2
counter(): called
counter is: 3

world name is: "unigine_project/unigine_project"