Character Physics

Conor_Hackett98

I've recently been working on a game. I've ran into many problems making the game but thanks to to great people here I've been able to get thorugh it. I have another problem. Currently the physics with the character isn't working the best (I'm using the Box2D library). To make the hit box follow the sprite I had to add When I move the character along the x coridnate the gravity doesn't seem to effect them as much. Also if the character is moved it seems to bounce along a platform, the jump doesn't work (Line: 108, 141) and finally I can't get the bullets to follow the player (I don't know what variable to use) (Line:296,306). I would greatly appricate any assistance that could be offered as I feel I'm in the finishing stretch of the game.

//Minim

//import ddf.minim.analysis.*;
//import ddf.minim.*;
//Minim minim;
//AudioPlayer Tune;


//Sprites
PImage sprite1;//, sprite2;

//Box2D
import shiffman.box2d.*;
import org.jbox2d.collision.shapes.*;
import org.jbox2d.common.*;
import org.jbox2d.dynamics.*;
// A list for all of our rectangles
ArrayList<Box> boxes;
Box2DProcessing box2d;

//Variables
float x=0.0;
float y=0.0;
float frame=0;
int direction=0;
int fchange=0;
int jump=0;

float left=0;
float right=0;

//Controls
int w = 0;
int a = 0;
int s = 0;
int d = 0;
int q = 0;

Box h;
Box i;


int l = 0;

void setup()
{
  //Base Setup
  size(1280, 720, P2D);
  frameRate(60);
  smooth();

  //Music Loading

 //minim = new Minim(this);
   //Tune = minim.loadFile("Tune.wav");
   //Tune.loop();


  //Image Loading
  //sprite1 = loadImage("Sprite1.jpg");
  //sprite2 = loadImage("Sprite2.jpg");

  textureMode(NORMAL);
  blendMode(BLEND);
  noStroke();

  // Initialize and create the Box2D world
  box2d = new Box2DProcessing(this);

  box2d.createWorld();

  // Turn on collision listening!
  box2d.listenForCollisions();

  // Create ArrayLists
  boxes = new ArrayList<Box>();

  //Top Platform
  Box p = new Box(640, 325, 300, 30, 1, false);
  boxes.add(p);

  //Middle Platform Left
  Box b = new Box(150, 515, 300, 30, 1, false);
  boxes.add(b);

  //Middle Platform Middle
  Box c = new Box(640, 515, 100, 30, 1, false);
  boxes.add(c);

  //Middle Platform Right
  Box e = new Box(1130, 515, 300, 30, 1, false);
  boxes.add(e);

  //Middle Colum
  Box f = new Box(640, 420, 30, 160, 1, false);
  boxes.add(f);

  //Bottom Platform
  Box g = new Box(640, 705, 1280, 30, 1, false);
  boxes.add(g);

  //Player 1
  h = new Box(x+25, y+37.5, 50, 75, 0, true);
  h.body.setGravityScale(9.8f);
  boxes.add(h);
  if (jump==1)
  {
    h.body.setAngularVelocity(1);
    h.body.setLinearVelocity(new Vec2(0, -10));
    jump=0;
  }
}
void draw()
{
  background(0, 200, 255);

  //Sun
  fill(255, 255, 0);
  ellipse(100, 100, 100, 100);

  // We must always step through time!
  box2d.step();
  // Display all the boxes
  for (Box b : boxes)
  {
    b.display();
  }

  //Player
  left = frame/2;
  right = (frame+1)/2;

  if (direction==1)
  {
    float temp = left;
    left = right;
    right = temp;
  }

  //Controls
  if (w==1)
  {
    jump = 1;
    y=y-10;
  }

  if ((a==1)&(x!=0))
  {
    direction = 0;
    x-=100;
    h.body.setAngularVelocity(1);
    h.body.setLinearVelocity(new Vec2(-100, 0));
    if (fchange == 10)
    {
      frame++;
      if (frame==2) frame=0;
      fchange=fchange-10;
    }


    fchange++;
  }

  if ((d==1)&(x!=1280-50))
  {
    direction=1;
    x+=100;
    h.body.setAngularVelocity(1);
    h.body.setLinearVelocity(new Vec2(100, 0));
    if (fchange == 10)
    {
      frame++;
      if (frame==2) frame=0;
      fchange=fchange-10;
    }
    fchange++;
  }

  if (s==1)
  {
    h.body.setGravityScale(100.8f);
    y=y+10;
  }
}

// A rectangular box
class Box
{
  // Instead of any of the usual variables,
  // we will store a reference to a Box2D Body
  Body body;
  Vec2 pos;
  float w, h;
  boolean player1;
  Box(float x, float y, float w_, float h_, int type, boolean player1)
  {
    this.player1 = player1;
    w = w_;
    h = h_;
    // Build Body
    BodyDef bd = new BodyDef();
    if (type==0)
    {
      bd.type = BodyType.DYNAMIC; // Was DYNAMIC
    } else
    {
      bd.type = BodyType.STATIC;
    }
    bd.position.set(box2d.coordPixelsToWorld(x, y));
    body = box2d.createBody(bd);
    // Define a polygon (this is what we use for a rectangle)
    PolygonShape sd = new PolygonShape();
    // Box2D considers the width and height of a
    // rectangle to be the distance from the
    // center to the edge (so half of what we
    // normally think of as width or height.)
    float box2dW = box2d.scalarPixelsToWorld(w/2);
    float box2dH = box2d.scalarPixelsToWorld(h/2);
    sd.setAsBox(box2dW, box2dH);

    // Define a fixture
    FixtureDef fd = new FixtureDef();
    fd.shape = sd;
    // Parameters that affect physics
    fd.density = 1;
    fd.friction = 100;
    fd.restitution = 0;
    // Attach Fixture to Body
    body.createFixture(fd);
  }
  void display()
  {
    // We need the Body’s location and angle
    pos = box2d.getBodyPixelCoord(body);    
    if(!player1)
    {
      pushMatrix();
      translate(pos.x, pos.y);
      fill(255, 0, 0);
      stroke(0);
      rectMode(CENTER);
      rect(0, 0, w, h);
      popMatrix();

    }

    if(player1)
    { 
      pushMatrix();
      translate(pos.x-25, pos.y-37.5);
      beginShape();
      noStroke();
      image(loadImage("Sprite1.jpg"), 0,0, 50, 75);
      vertex(0, 0, right, 0);
      vertex(50, 0, left, 0);
      vertex(50, 75, left, 1);
      vertex(0, 75, right, 1);
      endShape();
      popMatrix();

    }
  }
} // End of the Box Class description

void keyPressed()
{
  if (key=='w')
  {
    w = 1;
  }

  if (key=='d')
  {
    d = 1;
    /*
    Vec2 a = box2d.coordPixelsToWorld(h.pos.x+x, (h.pos.y));
    h.body.setTransform( a, 0.0f); 
    */

  }

  if (key=='a')
  {
    a = 1;
    /*
     Vec2 a = box2d.coordPixelsToWorld(h.pos.x+x, (h.pos.y));
     h.body.setTransform( a, 0.0f); 
    */
  }

  if (key=='s')
  {
    s = 1;
  }

  if ((key=='q')&&(direction==1))
  {
    i = new Box(x+55, y+35, 10, 10, 0, false);
    i.body.setGravityScale(0f);
    boxes.add(i);
    i.body.setAngularVelocity(1);
    i.body.setLinearVelocity(new Vec2(1280, 0));
  }
  if ((key=='q')&&(direction==0))
  {
    i = new Box(x-5, y+35, 10, 10, 0, false);
    i.body.setGravityScale(0f);
    boxes.add(i);
    i.body.setAngularVelocity(1);
    i.body.setLinearVelocity(new Vec2(-1280, 0));
  }
}

void keyReleased()
{
  if (key=='w')
  {
    w = 0;
  }

  if (key=='d')
  {
    d = 0;
  }

  if (key=='a')
  {
    a = 0;
  }

  if (key=='s')
  {
    s = 0;
  }
}