MarioKart style flash engine

[tomsamson]

to andré: too bad,that would rock badly,hope mm speeds up the next flash player a bit more
(by the way: i´m working together with a c++ coder who creates a standalone wrapper which accelerates swfs using the 3d card/open gl,might be a good project for that )

[Crackbobb]

AndreMichelle, have you considered trying Flasm? It is simply wonderful. With it I have been able to make a 3D engine I'm working on experience a 360% performance boost. Just a suggestion...

[Ihoss]

doesnt flasm just decompile it or something

[Crackbobb]

It both decompiles and compiles. Actually, I should say that it assembles and disassembles. I'd love to explain, but the author of Flasm has already done a better job of it than I probably could if I tried. The jist of it is that you can make optimizations to the low-level, Assembly-like commands that the Flash Player executes. Basically, you can optimize your scripts into a form that is impossible for the Flash compiler to produce.

[Lindyz]

Hi folx,

this one's got nothing to do with the recent posts, it's just a small but very helpful hint I got from Strille. I was wondering why all z_mapping codes (e.g. those of Strille and BlinkOK) won't work if "Publishing Preferences" is set to "Flash Player 7" (I'm using Flash MX 2004 Professional). Seems as if FP7 has a "major" problem with the z_mapping code - all older players worked fine.

But things are far more easier than I thought: Strille (thanx a lot to him... ) gave me the reason and a solution too: FP7 cannot add to undefined variables - they have to be set to zero first. That means adding the following line to the 6th frame (before _root.onEnterFrame = main):

xPos = yPos = rotation = lean = skyOffset = fr = speed = 0;

to the source code (here I'm talking about Strille's codex, http://www.strille.net/works/misc/z.../z_mapping.html).

Works perfectly!

Thanx again to Strille and BlinkOK who replied immediately to my mails - you helped me a lot!

Sorry if this information was already evident for some of you - I spent two days of searching the boards for a problem solution...

Flash on,
Lindyz

[Motoxpro]

If it says, "Please insert topic" or somthing like that. That means that you pushed the new topic button. BTW, is there anywhere i can find this engine, links are down.

[down2one]

i can't access your page...
i wanna see!!!
but i really can't access your page...
and i really wanna see...
wala lang...

[strille]

The original version by PercyPea seems to be gone. You can still view my version though (the url a couple of posts ago was wrong):

Flash MX "Constant Z Mapping" Example

(I've edited it so it I should now work in MX 2004 correctly)

[iiley0]

Thanx for the nice engine,I try to attach it in AS2.0,but when i finished it i saw there was some bugs,i just almost copy and paste the codes from z_mapping.I try to fix it but i failed after two days.I posted it here,hope some good guys can help me.
Thanx in advance.
The importance code is MapView3D.as:

import iiley.mode.View3D;
import iiley.mode.IUnit3D;

/**
 * @author        iiley
 */
 

class iiley.mode.MapView3D extends View3D{

    private var mainMC:MovieClip;
    private var strips:Array;
    private var width:Number;
    
    private var topH:Number        = 1;  // top strip height
    private var bottomH:Number     = 8;  // bottom strip height
    private var groundScale:Number = 10; // the "height" above the ground
    private var totalHeight:Number = 205; // the minimum total height of all strips

    public function MapView3D(camera:IUnit3D, mainMC:MovieClip,
                              width:Number,
                              topH:Number, bottomH:Number, groundScale:Number,totalHeight:Number){

        super(camera);
        this.mainMC = mainMC;
        this.strips = new Array();
        this.width= width;

        this.topH = topH;
        this.bottomH = bottomH;
        this.groundScale = groundScale;
        this.totalHeight = totalHeight;

    }

    public function init():Void{
        clearStrips();

        var averageH:Number = (topH + bottomH)/2; // average strip height
        var maskY:Number = 0;

        for (var a:Number=1; a <= totalHeight; a++) {
            var strip:MovieClip = mainMC.attachMovie("strip", a, a*2); // create strip
            strip._y = 220;
        
            strip.mask = mainMC.attachMovie("mask", "m"+a, a*2+1);
        
            var scale:Number = Math.pow(a / (totalHeight / averageH), 1.5); // exponential function to make strips exponentially smaller near horizon
            var height:Number = Math.round(topH + (bottomH - topH) * scale); // current strip height
            strip.mask._height = height + 1; // add 1 to strip height in order to prevent gaps when scale the flash movie
            strip.mask._width = width; // set mask width to something a bit larger than the movie width (because of leaning)
        
            maskY += height;
    
            strip._xscale = strip._yscale = (maskY/totalHeight)*totalHeight * groundScale;
    
            strip.mask._y = maskY; // place strip egde to edge with the previous strip in y pos
        
            strip.setMask(strip.mask);
            strip._rotation = 0;// -(camera.getHeading()/Math.PI*180+90);
            strip.m._y = 0;//-camera.getY();
            strip.m._x = 0;//-camera.getX();
        
            strips.push(strip);   //add this strip to array

            if (maskY+height*2 > totalHeight) { // exit when we have filled totalHeight with strips
                //trace("a="+a+" masky="+maskY); 
                break;
            }
        }

    }

    public function update():Void{
            var x:Number = camera.getX();                   // define xPos as a local variable for faster access
            var y:Number = camera.getY();                   // define yPos as a local variable for faster access
            var r:Number = -(camera.getHeading()/Math.PI*180+90); // define rotation as a local variable for speed
            var s:MovieClip = mainMC;                       // define s_mc as a local variable for faster access
            s.sky._x = 3*r % 512;
            for (var n:Number = 0; n < strips.length; ++n) {
                var rC:MovieClip = strips[n];
                var mC:MovieClip = rC.m;
                rC._rotation = r;
                mC._y = -y;
                mC._x = -x;
            }
    }

    private function clearStrips():Void{
        while(strips.length > 0){
            var strip = strips.pop();
            strip.mask.removeMovieClip();
            strip.removeMovieClip();
        }
    }

} 

and the files are here:
http://www.robochina.org/member/iiley/test3dcar.zip

[iiley0]

You can see the demo runs here:
http://www.robochina.org/member/iiley/test3dcar.html

You can easily see the bugs -- the several strips at bottom views wrongly.

[BlinkOk]

did you see Lindyz's post? if his suggestion does not work then mabey you could email/pm him.

[iiley0]

Thanks for your reply BlinkOk.
I had seen Lindyz's post before i post,and i know what his post meaning,he pointed the undefined variables problem(thanx him).

The bug in my testing is the different problem i think.I cannot find the bug's cause, so i post here hope some advanced ASer can give me some tips,however i am in thinking and testing to look for the solution too,when i find it i will post here(But i dont when).

[kdsh7]

You'll kick yourself - you really will. Looks like a video mem/display problem - if you'll forgive the subtle pun. Set quality to low and those strips will magically appear.

[iiley0]

Oh,god,it works well when i set quality to low.
Thank you kdsh7.

[ghettopacman]

hi,
need some feed back about : http://www.k-yoo.com/yokiyoki/

it's a bit laggy on mid config, in other words it's better to have a good computer
there is a lot of work in order to optimise that

main programming ezekyel@k-yoo.com
design & graphic programming al@k-yoo.com

a big thank to BlinkOk and AM for their help

i would like to be able to put some houses and I still have a problem with that
:

var i = -ry * 200 /( 100 + 2 * ry ); 
this._x = rx / 100 * ( ( 100 + i ) * 4 ); 
this._y = i 

in this code we just can't change the z value of the object (setted at 0) anyone knows how to get rid of that ?

[badsnax]

How do i put a building in this engine that you can drive around and see all the sides?

[tomsamson]

basically you have to draw (or render and export) the building in a full rotation around own axis animation,then you place it into the scenary with script and tell it which frame to display based on the player´s position to it

[badsnax]

What coding would i have to use to do that though?

[Ironclaw]

Cool.

[ghettopacman]

well...ironclaw...amazing !!! make a wish !
(i really master irony better than AS)