Projectile Simulation

Ball cannonball = new Ball(140, 0, 0, 20);

float time = 0;

boolean stop;

PShape cannon;

​

void setup() {

  size(1400, 550);

  background(0);

  fill(255, 90);

  stroke(255);

  //noStroke();

  smooth();

  frameRate(100);

  //textAlign(CENTER);

  stop = false;

  /*cannon = createShape();

  cannon.beginShape();

  cannon.fill(70, 70, 255);

  cannon. */

}

​

void draw() {

  background(0);

  cannonball.update(time);

  if (stop != true) {

    time += 0.01;  

  }

  displayData();

}

​

void displayData() {

  int pos1 = 20;

  int pos2 = 180;

  int pos3 = 350;

  int pos4 = 530;

  int line1 = 20;

  int line2 = 43;

  int line3 = 66;

  fill(255, 128, 0);

  textSize(20);

  text("R(t) - Position", pos1, line1);

  text("x: " + round(cannonball.getX()) + " m", pos1, line2); 

  text("y: " + round(cannonball.getY()) + " m", pos1, line3); 

  text("Projectile info", pos2, line1);

  text("Vi = " + cannonball.getVi() + " m/s", pos2, line2);

  text("Theta = " + cannonball.getTheta() + " °", pos2, line3);

  text("Velocity info", pos3, line1);

  text("Vx = " + round(cannonball.getVx()) + " m/s", pos3, line2);

  text("Vy = " + round(cannonball.getVy()) + " m/s", pos3, line3);

  text("Other data", pos4, line1);

  text("Time = " + time + " s", pos4, line2);

  fill(255, 90);

}

​

class Ball {

  float vi, xi, yi;

  float x;

  float y;

  float theta;

  float time;

  Ball(float _vi, float _xi, float _yi, float _theta){

    vi = _vi;

    xi = _xi;

    yi = _yi;

    theta = _theta;  

  }

  void update(float t){

    if (x >= 0 && x <= width && y >= 0 && y <= height) {

      int radius = 200;

      x = vi * t * cos(radians(theta));

      y = vi * t * sin(radians(theta)) - 4.9 * pow(t, 2);

      ellipse(x + xi, mY(y + yi), 13, 13);

      time = t;

    }

    else { stop = true; }

  }

  float getVx() {

    return vi * cos(radians(theta));

  }

  float getVy() {

    return vi * sin(radians(theta)) - 9.8 * time;

  }

  float getX () { return x; }

  float getY () { return y; }

  float getVi () { return vi; }

  float getTheta() { return theta; }

  float getXi () { return xi; }

  float getYi () { return yi; }

}

​

float mX (float _value) {

  return map(_value, 0, width, width, 0);

}

​

float mY (float _value) {

  return map(_value, 0, height, height, 0);

}