Java-Gaming.org Hi !
 Featured games (83) games approved by the League of Dukes Games in Showcase (583) Games in Android Showcase (163) games submitted by our members Games in WIP (633) games currently in development
 News: Read the Java Gaming Resources, or peek at the official Java tutorials
Pages: [1]
 ignore  |  Print
 Rotating a shape  (Read 1075 times) 0 Members and 1 Guest are viewing this topic.

Junior Newbie

 « Posted 2011-07-17 07:32:49 »

Hi,
I have a problem what I'm trying to do is make my fillRect() Rotate constantly as it moves around a point
What i mean by this is, I have wrote the trigonometry so the fillRect() moves around a point constantly and then what I am trying to do is make the shape rotate as it goes around the point any help would be apprecited

 1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42  43  44  45  46  47  48  49  50  51  52  53  54  55  56  57  58  59  60  61  62  63  64  65  66  67  68  69  70  71  72  73  74  75  76  77  78  79  80  81  82  83  84  85  86 `import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.*;/** * * @author Administrator */public class PhysicGUI extends JFrame{        private Trigonometry trig;    private MoveAnim move;    private Timer timer;    private int x;    private int y;            private double hypotenese;    private double cosine;    private double sine;    private double counter;    private int radianCounter;    public PhysicGUI()    {        super();        setSize( 500, 500 );        setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );        trig = new Trigonometry();        move = new MoveAnim();        timer = new Timer( 500, move );        x = 250;        y = 250;        hypotenese = 60;        sine = 0;        cosine = 0;        counter = 0;        radianCounter = 0;        timer.start();    }    public void paint( Graphics g )    {        super.paint( g );             Graphics2D g2d = ( Graphics2D )g;        g2d.translate( 15, 15 );        g2d.rotate( radianCounter++, x , y  );        g2d.fillRect( x + ( int )trig.getCosine() ,                    y + ( int )trig.getSine(), 30, 30 );    }    public void move()    {        double radian =  Math.toRadians( counter );        cosine = Math.cos( radian ) * hypotenese;        sine = Math.sin( radian ) * hypotenese;        counter = counter + 30;        if( counter > 360 )        {            counter = 0;        }    }        public class MoveAnim implements ActionListener    {        public void actionPerformed(ActionEvent e)        {            repaint();            move();        }    }    public static void main( String[]args )    {        PhysicGUI gui = new PhysicGUI();        gui.setVisible( true );            }}`
ra4king

JGO Kernel

Medals: 387
Projects: 3
Exp: 5 years

I'm the King!

 « Reply #1 - Posted 2011-07-17 07:53:18 »

Why are you translating by (15,15) before the call to rotate?
I assume the position of the point is (250,250)?

Junior Newbie

 « Reply #2 - Posted 2011-07-17 08:13:07 »

Hi,
Yes the x , y are 250 I was just kinda using stuff I found on the internet I don't think translate should even be used?
ra4king

JGO Kernel

Medals: 387
Projects: 3
Exp: 5 years

I'm the King!

 « Reply #3 - Posted 2011-07-17 09:24:56 »

Well the call to rotate already translates for you.
From the javadocs, rotate(theta,x,y) is the same as doing:
translate(x,y);
rotate(theta);
translate(-x,-y);

Sinuath

Junior Devvie

Medals: 2

 « Reply #4 - Posted 2011-07-17 10:08:58 »

affine transformations?

Hey [you][/you], you should totally check out my boring Site ~ http://davediel.com/chris
Pages: [1]
 ignore  |  Print

You cannot reply to this message, because it is very, very old.

 Ralphanese (22 views) 2015-05-29 13:07:55 Gibbo3771 (18 views) 2015-05-29 06:54:17 Ralphanese (23 views) 2015-05-28 16:52:52 theagentd (31 views) 2015-05-27 22:21:17 theagentd (38 views) 2015-05-27 22:21:08 CopyableCougar4 (27 views) 2015-05-27 19:24:50 MrMapcom (24 views) 2015-05-23 20:26:16 MrMapcom (33 views) 2015-05-23 20:23:34 Waterwolf (39 views) 2015-05-20 15:01:45 chrislo27 (46 views) 2015-05-20 03:42:21
 Riven 27x Rayvolution 25x theagentd 23x BurntPizza 21x Spasi 17x KevinWorkman 17x orangepascal 16x Drenius 15x ra4king 13x princec 12x opiop65 12x DavidBVal 12x Husk 11x EgonOlsen 10x kevglass 9x Zeldar 9x
 Intersection Methodsby Roquen2015-05-29 08:19:33List of Learning Resources2015-05-05 10:20:32How to: JGO Wikiby Mac702015-02-17 20:56:162D Dynamic Lighting2015-01-01 20:25:42How do I start Java Game Development?by gouessej2014-12-27 19:41:21Resources for WIP gamesby kpars2014-12-18 10:26:14Understanding relations between setOrigin, setScale and setPosition in libGdx2014-10-09 22:35:00Definite guide to supporting multiple device resolutions on Android (2014)2014-10-02 22:36:02
 java-gaming.org is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑gaming.org