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Jbox2D server?

in Contributed Library Questions  •  11 months ago  
      So I have been working on getting a server - client jbox2D based sketch  going and I got it mostly working.  However, I have been having some strange bugs that I can't work out.  Right now, I have projectile syncing working but for some reason, gravity seems to stop working after a while.  Anyone know how to fix this?

Due to the amount of code and how I wrote it, I feel it would be unreasonable to put the entire thing in here so what I did was I uploaded my sketch to mediafire.  Here is the link:  http://www.mediafire.com/?6yy9votk4q7ivpd

However, I do have the main page of the server and the client here in-case there is any obvious bugs that are easy to spot:

server main tab:

Copy code
  2. import pbox2d.*;
  3. import org.jbox2d.common.*;
  4. import org.jbox2d.dynamics.joints.*;
  5. import org.jbox2d.collision.shapes.*;
  6. import org.jbox2d.collision.shapes.Shape;
  7. import org.jbox2d.common.*;
  8. import org.jbox2d.dynamics.*;
  9. import org.jbox2d.dynamics.contacts.*;
  10. import processing.net.*;

  12. PBox2D box2d;

  14. Tank tank;

  16. Server s;
  17. Client c;
  18. String input;
  19. int data[];

  21. //ArrayList boundaries;

  23. Surface surface;

  25. ArrayList<Particle> particles;

  27. void setup() {
  28.   size(1000,500);
  29.   smooth();
  30.   box2d = new PBox2D(this);
  31.   box2d.createWorld();
  32.   tank = new Tank(200,200);
  33.   /*boundaries = new ArrayList();
  34.   boundaries.add(new Boundary(width/2,height-5,width,10,0));
  35.   boundaries.add(new Boundary(width/2,5,width,10,0));
  36.   boundaries.add(new Boundary(width-5,height/2,10,height,0));
  37.   boundaries.add(new Boundary(5,height/2,10,height,0));*/
  38.   particles = new ArrayList<Particle>();
  39.   surface = new Surface();
  40.   s = new Server(this, 7787);
  41.   
  42. }

  44. void mousePressed(){
  45.   Vec2 temp_pos = tank.getCenter();
  46.   float temp_deg = getAngle(int(temp_pos.x),int(temp_pos.y)-15,mouseX,mouseY,90);
  47.   particles.add(new Particle(temp_pos.x,temp_pos.y-15,cos(radians(temp_deg))*30,sin(radians(temp_deg))*30,3));
  48. }
  49. void keys(){
  50.   if(keyPressed){
  51.     if(key == 'a' || key == 'A'){
  52.       tank.setSpeed(PI*3);
  53.     }else if(key == 'd' || key == 'D'){
  54.       tank.setSpeed(-PI*3);
  55.     }else{
  56.       tank.setSpeed(0);
  57.     }
  58.   }else{
  59.     tank.setSpeed(0);
  60.   }
  61. }
  62. void draw() {
  63.   boolean repeat = true;
  64.   while(repeat){
  65.     c = s.available();
  66.     if(c != null){
  67.       input = c.readString();
  68.       //input = input.substring(0, input.indexOf("\n")); // Only up to the newline
  69.       data = int(split(input, ' ')); // Split values into an array
  70.       if(data[0] == 0){
  71.         String senddata = "0";
  72.         ArrayList<Vec2> temp_senddata = surface.getPosData();
  73.         for(int i = 0; i < temp_senddata.size(); i++){
  74.           senddata = senddata + " " + temp_senddata.get(i).x + " " + temp_senddata.get(i).y;
  75.         }
  76.         s.write(senddata);
  77.       }else if(data[0] == 1){
  78.         println("server recived data request");
  79.         String senddata = "1";
  80.         for (int i = particles.size()-1; i >= 0; i--) {
  81.           Particle p = particles.get(i);
  82.           Vec2 temp_pos = p.getPostion();
  83.           Vec2 temp_velocity = p.getLinearVelocity();
  84.           senddata = senddata + " " + temp_pos.x + " " + temp_pos.y + " " + temp_velocity.x + " " + temp_velocity.y + " " + p.getAngularVelocity() + " " + p.getLinearDamping();
  85.         }
  86.         s.write(senddata);
  87.       }
  88.     }else{
  89.       repeat = false;
  90.     }
  91.   }
  92.   keys();
  93.   background(255);
  94.   box2d.step();
  95.   tank.display();
  96.   /*
  97.   for (int i = 0; i < boundaries.size(); i++) {
  98.     Boundary wall = (Boundary) boundaries.get(i);
  99.     wall.display();
  100.   }*/
  101.   surface.display();
  102.   fill(0);
  103.   for (int i = particles.size()-1; i >= 0; i--) {
  104.     Particle p = particles.get(i);
  105.     p.display();
  106.     // Particles that leave the screen, we delete them
  107.     // (note they have to be deleted from both the box2d world and our list
  108.     if (p.done()) {
  109.       particles.remove(i);
  110.     }
  111.   }
  112.   fill(0);
  113.   text("Use the mouse to aim and fire\nPress space to toggle motor",12,22);
  114. }
  115. float getDistance(int x1,int y1,int x2,int y2){
  116.   return sqrt(sq(abs(x1-x2))+sq(abs(y1-y2)));
  117. }
  118. float getAngle(int x1,int y1,int x2,int y2,int offset){
  119.   float output;
  120.   if(x2>x1){
  121.     output=map(acos((y2-y1)/getDistance(x1,y1,x2,y2)),0,PI,0,180);
  122.   }else{
  123.     output=(180-map(acos((y2-y1)/getDistance(x1,y1,x2,y2)),0,PI,0,180))+180;
  124.   }
  125.   output=output-offset;
  126.   output=mapToDeg(output);
  127.   return output;
  128. }
  129. float mapToDeg(float input){
  130.   while(input<0){
  131.     if(input<0){
  132.       input=input+360;
  133.     }
  134.   }
  135.   while(input>=360){
  136.     if(input>=360){
  137.       input=input-360;
  138.     }
  139.   }
  140.   return input;
  141. }

client main tab:

Copy code
  2. import pbox2d.*;
  3. import org.jbox2d.common.*;
  4. import org.jbox2d.dynamics.joints.*;
  5. import org.jbox2d.collision.shapes.*;
  6. import org.jbox2d.collision.shapes.Shape;
  7. import org.jbox2d.common.*;
  8. import org.jbox2d.dynamics.*;
  9. import org.jbox2d.dynamics.contacts.*;
  10. import processing.net.*;

  12. PBox2D box2d;

  14. Tank tank;

  16. Client c;

  18. String input;
  19. float data[];
  20. int reconnection;
  21. boolean wait;
  22. int waitcount;
  23. int nettimer;

  25. NumberBox ipa = new NumberBox(3);
  26. NumberBox ipb = new NumberBox(3);
  27. NumberBox ipc = new NumberBox(3);
  28. NumberBox ipd = new NumberBox(3);

  30. //ArrayList boundaries;

  32. Surface surface;

  34. ArrayList<Particle> particles;

  36. int menumode = 0;

  38. void setup() {
  39.   size(1000,500);
  40.   smooth();
  41.   box2d = new PBox2D(this);
  42.   box2d.createWorld();
  43.   tank = new Tank(200,200);
  44.   /*boundaries = new ArrayList();
  45.   boundaries.add(new Boundary(width/2,height-5,width,10,0));
  46.   boundaries.add(new Boundary(width/2,5,width,10,0));
  47.   boundaries.add(new Boundary(width-5,height/2,10,height,0));
  48.   boundaries.add(new Boundary(5,height/2,10,height,0));*/
  49.   particles = new ArrayList<Particle>();
  50. }

  52. void draw(){
  53.   switch(menumode){
  54.     case 0:
  55.       renderMenu();
  56.       break;
  57.     case 1:
  58.       tryconnection();
  59.       break;
  60.     case 2:
  61.       renderGame();
  62.       break;
  63.   }
  64. }
  65. void keyPressed(){
  66.   if(menumode == 2){
  67.     ipa.keyin();
  68.     ipb.keyin();
  69.     ipc.keyin();
  70.     ipd.keyin();
  71.   }
  72. }
  73. void tryconnection(){
  74.   if (c.available() > 0) {
  75.     input = c.readString();
  76.     //input = input.substring(1, input.indexOf("\n")); // Only up to the newline
  77.     data = float(split(input, ' ')); // Split values into an array
  78.     println(data);
  79.     if(data[0] == 0 && data[data.length-1] == 0 && data.length > 300){
  80.       ArrayList<Vec2> surfacein = new ArrayList<Vec2>();
  81.       for(int i = 1; i < data.length-2; i = i + 2){
  82.         surfacein.add(new Vec2(data[i],data[i+1]));
  83.       }
  84.       surfacein.add(new Vec2(0,0));
  85.       surface = new Surface(surfacein);
  86.       menumode = 2;
  87.     }else{
  88.       wait = true;
  89.     }
  90.   }
  91.   if(wait){
  92.     waitcount = waitcount + 1;
  93.   }
  94.   if(waitcount >= 40){
  95.     waitcount = 0;
  96.     wait = false;
  97.     c.write("0");
  98.   }
  99. }
  100. void renderMenu(){
  101.   background(255);
  102.   ipa.render(width/2-55,height/2-7,25,15);
  103.   ipb.render(width/2-27,height/2-7,25,15);
  104.   ipc.render(width/2+2,height/2-7,25,15);
  105.   ipd.render(width/2+30,height/2-7,25,15);
  106.   text("Enter server Ip:",width/2-40,height/2-10);
  107.   if(button(width/2-23,height/2+12,46,12,"connect")){
  108.     menumode = 1;
  109.     c = new Client(this, ipa.getData() + "." + ipb.getData() + "." + ipc.getData() + "." + ipd.getData(), 7787);
  110.     c.write("0\n");
  111.   }
  112.   if(button(width/2-27,height/2+26,54,12,"localhost")){
  113.     menumode = 1;
  114.     c = new Client(this,"LOCALHOST", 7787);
  115.     c.write("0");
  116.   }
  117. }

  119. void mousePressed(){
  120.   if(menumode == 2){
  121.     Vec2 temp_pos = tank.getCenter();
  122.     float temp_deg = getAngle(int(temp_pos.x),int(temp_pos.y)-15,mouseX,mouseY,90);
  123.     //particles.add(new Particle(temp_pos.x,temp_pos.y-15,cos(radians(temp_deg))*30,sin(radians(temp_deg))*30,3));
  124.   }
  125. }
  126. void keys(){
  127.   if(keyPressed){
  128.     if(key == 'a' || key == 'A'){
  129.       tank.setSpeed(PI*3);
  130.     }else if(key == 'd' || key == 'D'){
  131.       tank.setSpeed(-PI*3);
  132.     }else{
  133.       tank.setSpeed(0);
  134.     }
  135.   }else{
  136.     tank.setSpeed(0);
  137.   }
  138. }
  139. void renderGame() {
  140.   if (c.available() > 0) {
  141.     input = c.readString();
  142.     //input = input.substring(1, input.indexOf("\n")); // Only up to the newline
  143.     data = float(split(input, ' ')); // Split values into an array
  144.     println("data revived");
  145.     if(data[0] == 0 && data[data.length-1] == 0 && data.length > 300){
  146.       ArrayList<Vec2> surfacein = new ArrayList<Vec2>();
  147.       for(int i = 1; i < data.length-2; i = i + 2){
  148.         surfacein.add(new Vec2(data[i],data[i+1]));
  149.       }
  150.       surfacein.add(new Vec2(0,0));
  151.       surface = new Surface(surfacein);
  152.     }else if(data[0] == 1 && data.length > 1){
  153.       println("client recived update ");
  154.       //newparticles.clear();
  155.       particles.clear(); 
  156.       for (int i = 1; i <= data.length-6; i = i + 6){     
  157.         particles.add(new Particle(data[i],data[i+1],data[i+2],data[i+3],3,data[i+4],data[i+5]));
  158.       }
  159.     }
  160.   }
  161.   keys();
  162.   background(255);
  163.   box2d.step();
  164.   tank.display();
  165.   if(nettimer == 20){
  166.     c.write("1 ");
  167.   }else if(nettimer >= 40){
  168.     nettimer = 0;
  169.   }
  170.   nettimer = nettimer + 1;
  171.   /*
  172.   for (int i = 0; i < boundaries.size(); i++) {
  173.     Boundary wall = (Boundary) boundaries.get(i);
  174.     wall.display();
  175.   }*/
  176.   if(surface != null){
  177.     surface.display();
  178.   }
  179.   fill(0);
  180.   //if(particles != null){
  181.     for (int i = particles.size()-1; i >= 0; i--) {
  182.       Particle p = particles.get(i);
  183.       p.display();
  184.       // Particles that leave the screen, we delete them
  185.       // (note they have to be deleted from both the box2d world and our list
  186.       if (p.done()) {
  187.         particles.remove(i);
  188.       }
  189.     }
  190.   //}
  191.   fill(0);
  192.   text("Use the mouse to aim and fire\nPress A and D to move",12,22);
  193. }
  194. float getDistance(int x1,int y1,int x2,int y2){
  195.   return sqrt(sq(abs(x1-x2))+sq(abs(y1-y2)));
  196. }
  197. float getAngle(int x1,int y1,int x2,int y2,int offset){
  198.   float output;
  199.   if(x2>x1){
  200.     output=map(acos((y2-y1)/getDistance(x1,y1,x2,y2)),0,PI,0,180);
  201.   }else{
  202.     output=(180-map(acos((y2-y1)/getDistance(x1,y1,x2,y2)),0,PI,0,180))+180;
  203.   }
  204.   output=output-offset;
  205.   output=mapToDeg(output);
  206.   return output;
  207. }
  208. float mapToDeg(float input){
  209.   while(input<0){
  210.     if(input<0){
  211.       input=input+360;
  212.     }
  213.   }
  214.   while(input>=360){
  215.     if(input>=360){
  216.       input=input-360;
  217.     }
  218.   }
  219.   return input;
  220. }
  221. boolean button(int x, int y, int w, int h, String textin){
  222.   stroke(0);
  223.   if(mouseX >= x && mouseX <= x+w && mouseY >= y && mouseY <= y+h){
  224.     if(mousePressed){
  225.       return true;
  226.     }
  227.     fill(255,255,210);
  228.   }else{
  229.     fill(255);
  230.   }
  231.   strokeWeight(1);
  232.   rect(x,y,w,h);
  233.   fill(0);
  234.   text(textin,x+1,y+h-1);
  235.   return false;
  236. }

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