July 24, 2008

Using pointer: download A sample pointer enabled killer game

I add a sample project for more discuss in light and cameras. it is only a camera moving in between walls(textures are from internet).I'll add gun and other effects to it in next time.You can also edit 3d model in way you want. This is my model in 3 direction:top,camera,left and perspective

This model have a camera and 3 light and you should draw your model on base of your camera(upper right picture) and if you want use another cameras also you should configure your model on base of them. In this model camera id is 14 and for loading camera in program this code is enough

Camera camera;


Camera position in this model is your person eye.You can move camera in every place with this code


For example you can move it with pointer with this code

protected void pointerPressed(int x, int y) {



Pointerpress is a function that invoked when a pointer pressed and x,y is pointer location in screen .You can say that when pointer pressed (x,y) location in screen camera can move.you can add image and text to game for this purpose also. In next post i add text and image to this project for getting better result from this project.

Download project

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July 16, 2008

Advanced programming I: lights and cameras

1.your 3d model

In every game you should select your lights and cameras carefully and move them on base of your objects moves specially in 3d games.

In this 3d model you see three light( free spot) and one camera and panel and ball(sphere).this is a sample game for moving a ball in panel.For using it you should export in m3g After do that maybe you see a view such this in a m3g player

As you see you may lost some graphics on base of your m3g exporter and your 3d software now you are ready for moving your lights and cameras.

2.moving your lights and cameras

Java have two class for moving light and cameras in m3g files with name Light and Camera.

For moving light and cameras you can use this codes

Light l=(Light)(Myworld.find(lighted);//getting your desired light

l. setTranslation(x,yz);//move it to x,y,z location

Camera m;m=(Camera)(Myworld.find(cameraid);//get your desired camera from your world

m.setTranslation(x,y,z);// move it to x,y ,z location

now you can run your game in netbeans emulator (see picture)but you should now that your game maybe presented in mobiles differently on base of their graphics.

You can send your comments about this post .I'll be glad for them.

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July 9, 2008

Download and develop your 3d java game mobile

For starting in programming with netbeans first I upload a sample java mobile game project that you can download it and run it or change it and even make a new game.

3d model making

1-for starting programming first you should have 3d model maker .this software should can export models to m3g.I using 3ds max 2008 but you can also use any 3d software like blender and a m3g exporter with it.Blender and m3g exporter are free.Maya is another good software for it but is not free.Every box and sphere you create in this software ,have an id in m3g that give you access to them and You can rotate and move this object .Graphics of this model maybe have some problem in

Some phones on base of their graphics.

Netbeans project information

2. After make your 3d model and export it now you are ready for programming .you should export your 3d model to subfolder "src\res" from your project folder .

My game engine is panel1 class and game canvas is "Canvas" and middle is hellomiddlet. 3ds model is in res folder (game1.max)with m3g file and you can change this model in way you want.your project name in netbeans is your project folder(unzip file after download) and you jar file is in dist folder.You can run it from mobile .In next post I'll explain my project functions and cods and models.

About functions and code

Panel1 class have two functions setmeshpositions and movemesh.setmeshpositions (15,35,35,35) means that your object with id 15 is positioned in 3 dimension space in xyz coordinate(x=35,y=35,z=35) and movemesh(15,"up",5) moving your object with id 15 to up direction in 5 unit.For example in this code

int state = getKeyStates();

if( ( state & DOWN_PRESSED ) != 0 ){

panel.movemesh(15, "up", 5);

state value is 1 when your using a key(in otherwise is 0) or no and DOWN_PRESS value say that you pressed down or

no and if two of them are true mesh move up 5 unit in up direction.you can change this code with replace up with down or like that.in next post I'll write some more about this codes and functions.

Download project now

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July 1, 2008

About middlet and gamecanvas


When you start to programming with java for mobile ,first class you build is midlet .Midlet is an interface between you and mobile. In netbeans you can easily add midlet automatically or with right click in project and in new menu click in visual midlet. In visual midlet you have a form by default and actions belong to it and in graphical interface you can easily add text or other thing to form but if you dont wnat to have form in your program you need only midlet.This class have functions like startApp,destoryApp,startMidlet and like .This function say's what you want to do when midlet started or your program started and etc.In middle you can also switch display of your program between graphics and forms that you make or add your command to your program. It is better that you have this class and game canvas and game engine in different file. It give your program better readability and of course better performance.You can use your game engine in other programs and your game canvas in other midlet and many other features.

Your game engine can also contains more class in base you programs.



In mobile programs you have also a gamecanvas (midpcanvas) class.This class contain function for pressing or dragging or clicking keys or pointers and you can add your functions to them.it is an example

protected void keyPressed(int keyCode) {

int action = getGameAction( key );



Case DOWN:






DOWN,UP,RIGHT,LEFT are predefined value's in gamecanvas class and their value is same with returning value from getGameAction(key) when you click down ,up,right and left key in mobile.

A game canvas also has paint function .With paint and repaint function you can draw your graphic world(you'll learn about it in following posts) .You can change your graphics world everywhere and repaint it everywhere also.But you should know more repaint in bad place in class forced to some problem in your game graphics .

With this primary information you are almost ready for start programming .

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