java - Processing with JBox2d Hellow World issue -


using eclipse, i'm trying write simple hello world program in processing draws rectangle on screen has gravity drop seen in this tutorial.

the problem when try import p5 package, it's not resolving can't declare physics object. tried 2 things.

  1. download zip, unzip it, import 3 jars (library, serialization, & testbed)

    a. import org.jbox2d.p5.*; doesn't resolve others do

    b. physics physics; doesn't resolve

  2. download older standalone testbed jar import it

    a. physics physics; doesn't resolve;

here i'm starting

import org.jbox2d.util.nonconvex.*; import org.jbox2d.dynamics.contacts.*; import org.jbox2d.testbed.*; import org.jbox2d.collision.*; import org.jbox2d.common.*; import org.jbox2d.dynamics.joints.*; import org.jbox2d.p5.*; import org.jbox2d.dynamics.*;  import processing.core.papplet;  public class myfirstjbox2d extends papplet  {      physics physics;      public void setup() {       size(640,480);       framerate(60);       initscene();     }      public void draw() {       background(0);        if (keypressed) {         //reset         physics.destroy();         initscene();       }      }      public void initscene() {       physics = new physics(this, width, height);       physics.setdensity(1.0f);       physics.createrect(300,200,340,300);     } }

everything in zip file tutorial.

all classes in org.jbox2d.p5 contained in boxwrap2d.jar. add physics.java (plus other dependent java files) source path.


Comments

Post a Comment

Popular posts from this blog

java.util.scanner - How to read and add only numbers to array from a text file -

i'm learning java , have question regarding reading file want read numbers file contains strings well. here example of file: 66.56 "3 java 3-43 5-42 2.1 1 and here coding: public class test { public static void main (string [] args){ if (0 < args.length) { file x = new file(args[0]); try{ scanner in = new scanner( new fileinputstream(x)); arraylist<double> test = new arraylist<>(); while(in.hasnext()){ if(in.hasnextdouble()){ double f=in.nextdouble(); test.add(f);} else {in.next();} } catch(ioexception e) { system.err.println("exception during reading: " + e); } } my problem add 66.56,2.1 , 1 doesn't add 3 after "3 or ignores 3-43 , 5-42 can tell me how skip strings , add doubles here? thanks all said 3 ie; "3, 3-43 , 4-42 strings either u read string , split , check number @ " , - or put in space between characters , integers. jvm after compilation tre...
Read more

rewrite - Trouble with Wordpress multiple custom querystrings -

i'm working on adding multiple querystring , doesn't seem work. i've found codes seems work others might i'm missing something. i want like: http://mydomain.com/board/?getyear=2013&getsometext2=sometext to http://mydomain.com/board/2013/sometext/ i added code below functions.php file. doesn't seem work should though. this works. echoing querystring gets both variable without problem. http://mydomain.com/board/2013/sometext/ but doesn't. tested querystring vis isset() seems nothing being set/get http://mydomain.com/board/2013/ function add_query_vars($vars) { $vars[] = "getyear"; $vars[] = "getsometext2"; return $vars; } add_filter('query_vars', 'add_query_vars'); function add_rewrite_rules($arules) { $anewrules = array('board/([^/]+)/([^/]+)/?$' => 'index.php?pagename=board&getyear=$matches[1]&getsometext2=$matches[2]'); $arules = $a...
Read more