HW #21

[chasestarr]

In this homework we will solve the problem of turning objects in the direction of movement. Grab the mover class from here.

_Description:_
Use the arrow keys to apply a force to your mover object. Left arrow will push the mover to the left, up arrow pushes up, and so on. Use the rotate() function to turn the object in the direction of movement. Use velocity.heading() to calculate theta, or the movement angle. Below are some code examples that will help out. Take a look at this link for keyCode reference.

This image shows an alternate way of setting up the checkEdges() function.

This image shows how to implement one button in your code.

[Brandonsugar]

Tab 1;

Mover m;
Bright[] stars = new Bright[100];

void setup(){
  size(1400,830);
  for(int i=0; i<stars.length; i++){
    stars[i] = new Bright();
  }
  m = new Mover(width/2,height/2);
}
void draw(){
  background(0);
  for(int i=0; i<stars.length; i++){
    stars[i].display();
  }
  m.display();
  m.update();
  m.checkEdges();

  //m.applyForce(drag);
  float c = 0.01;
  float speed = m.velocity.mag();
  float dragMagnitude = c * speed * speed;
  PVector drag = m.velocity.get();
  drag.mult(-1);
  drag.normalize();
  drag.normalize();
  drag.mult(dragMagnitude);
  m.applyForce(drag);
}
void keyPressed(){
  if(keyCode == RIGHT){
    m.applyForce(new PVector(0.75,0));
  }
  if(keyCode == LEFT){
    m.applyForce(new PVector(-0.7,0));
  }
  if(keyCode == UP){
    m.applyForce(new PVector(0,-0.75));
  }
  if(keyCode == DOWN){
    m.applyForce(new PVector(0,0.75));
  }
}

[Brandonsugar]

Tab 2;

class Bright{
  PVector location;
  float mass;

  Bright(){
    location = new PVector(random(width),random(height));
    mass = random(0.5,4);
  }

  void display(){
    float size = mass;
    stroke(0);
    fill(255);
    ellipse(location.x,location.y,1*size,1*size);
  }
}

[Brandonsugar]

Tab 3;

class Mover{
  PVector location;
  PVector velocity;
  PVector acceleration;
  float mass;

  Mover(float xLoc, float yLoc){
    location = new PVector(xLoc,yLoc);
    velocity = new PVector(0,0);
    acceleration = new PVector(0,0);
    mass = random(1,6);
  }

  void applyForce(PVector force){
    PVector f = PVector.div(force,mass);
    acceleration.add(f);
  }

  void display(){
    float Theta = velocity.heading();
    stroke(0);
    fill(255);
    pushMatrix();
    rectMode(CENTER);
    translate(location.x,location.y);
    rotate(Theta);
    rect(0,0,30,15);
    fill(0);
    ellipse(5,0,10,10);
    fill(255,0,0);
    rect(-13,10.5,15,5);
    rect(-13,-10.5,15,5);
    rect(17.5,0,4,15);
    rect(24,0,10,3);
    popMatrix();
    velocity.limit(10);
  }

  void update(){
    velocity.add(acceleration);
    location.add(velocity);
    acceleration.mult(0);
  }

  void checkEdges(){
    if(location.x > width){
      location.x = width/2;
      location.y = height/2;
    } else if(location.x < 0){
      location.x = width/2;
      location.y = height/2;
    }
    if(location.y > height){
      location.x = width/2;
      location.y = height/2;
    } else if(location.y < 0){
      location.x = width/2;
      location.y = height/2;
    }
  }
}

[Firefox99]

tab 1

Ship theShip;


void setup(){
 size(700,700);
 theShip = new Ship(random(width),random(height));
}

void draw(){
  background(0);

  theShip.update();
  theShip.checkEdges();
  theShip.display();

}

void keyPressed(){
 if(keyCode == LEFT){
   theShip.applyForce(new PVector(-1,0));
 }
 if(keyCode == RIGHT){
   theShip.applyForce(new PVector(1,0));
 }
 if(keyCode == UP){
   theShip.applyForce(new PVector(0,-1));
 }
 if(keyCode == DOWN){
   theShip.applyForce(new PVector(0,1));
 }
}

tab 2

class Ship{
  PVector location;
  PVector velocity;
  PVector acceleration;
  float mass;

  Ship(float xLoc, float yLoc){
    location = new PVector(xLoc,yLoc);
    velocity = new PVector(0,0);
    acceleration = new PVector(0,0);
    mass = random(1,6);
  }

  void applyForce(PVector force){
    PVector f = PVector.div(force,mass);
    acceleration.add(f);
  }

  void display(){

    fill(150);
    rect(location.x,location.y,20,60);
    fill(#F70F0F);
    triangle(location.x,location.y,location.x+20,location.y,location.x+10,location.y-20);
    triangle(location.x,location.y+60,location.x,location.y+35,location.x-15,location.y+60);
    triangle(location.x+20,location.y+60,location.x+20,location.y+35,location.x+35,location.y+60);
   velocity.limit(20);
  }

  void update(){
    velocity.add(acceleration);
    location.add(velocity);
    acceleration.mult(0);
  }

  void checkEdges(){
    if(location.x > width){
     location.x  = 1.0;
    } else if(location.x < 0){
      location.x = width;
    }

    if(location.y > height){
      location.y = 1.0;
    } else if(location.y < 0){
      location.y = height;
    }
  }
}

[The-Space-Core]

Mover ball;
Asteroid[] rock;

void setup(){
size(800,800);
rock = new Asteroid[20];
for (int i = 0; i < rock.length; i++){
rock[i] = new Asteroid();
println("index"+i + " is " +rock[i]);
ball = new Mover(200,200);
}
}
void draw(){
background(0);
for (Asteroid a : rock) {
a.update();
a.display();
a.checkEdges();
ball.display();
ball.checkEdges();
ball.update();

}
float c = 1;
float speed = ball.velocity.mag();
float dragMagnitude = c * speed * speed;
PVector drag = ball.velocity.get();
drag.mult(-1);
drag.normalize();
drag.mult(dragMagnitude);
}
void keyPressed(){
if(keyCode == LEFT){
ball.applyForce(new PVector(-0.1,0));
} if(keyCode == RIGHT){
ball.applyForce(new PVector(0.1,0));
} if(keyCode == UP){
ball.applyForce(new PVector(0,-0.1));
} if(keyCode == DOWN){
ball.applyForce(new PVector(0,0.1));
}
}

[The-Space-Core]

class Asteroid{
PVector location;
float mass;
PVector acceleration;
PVector velocity;

Asteroid(){
location = new PVector(random(width),random(height));
velocity = new PVector(random(-2,2),random(-2,2));
acceleration = new PVector(0.001,-0.001);

}

void display(){
stroke(255);
noFill();
ellipse(location.x,location.y,50,50);
rect(location.x-10,location.y-10,25,23);
float[]nums=new float[50];

}

void update(){
velocity.add(acceleration);
location.add(velocity);
acceleration.mult(0);
velocity.limit(1000);

}
void applyForce(PVector force){
acceleration.add(force);
}
void checkEdges(){
if(location.x > width){
location.x = 0;
} else if(location.x < 0){
location.x = width;
}
if(location.y > height){
location.y = 0;
} else if(location.y < 0){
location.y = height;
}
}
}

[The-Space-Core]

class Mover{
PVector location;
PVector velocity;
PVector acceleration;
float mass;

Mover(float xLoc, float yLoc){
location = new PVector(xLoc,yLoc);
velocity = new PVector(0,0);
acceleration = new PVector(0,0);
mass = random(1,6);
}

void applyForce(PVector force){
PVector f = PVector.div(force,mass);
acceleration.add(force);
}

void display(){
float theta = velocity.heading();
stroke(255);
noFill();
pushMatrix();
rectMode(CENTER);
translate(location.x,location.y);
rotate(theta);
ellipse(0,0,30,10);
popMatrix();

}

void update(){
velocity.add(acceleration);
location.add(velocity);
acceleration.mult(0);
velocity.limit(0.1);

}

void checkEdges(){
if(location.x > width){
location.x = 0;
} else if(location.x < 0){
location.x = width;
}

if(location.y > height){
  location.y = 0;
} else if(location.y < 0){
  location.y = height;
}

}

}

[GoHawks12]

Tab one

mover a;

Space[] ship = new Space[100];

void setup(){
  size(1000,1000);
  for(int i=0; i < ship.length; i++){
    ship[i] = new Space();
  }
  a = new mover(width/2,height/2);
}

void draw(){
  background(0);
  for(int i=0; i<ship.length; i++){
    ship[i].display();
  }
  a.display();
  a.update();
  a.checkEdges();

  //a.applyForce(drag);
  float c = 0.01;
  float speed = a.velocity.mag();
  float dragmagnitude = c * speed * speed;
  PVector drag = a.velocity.get();
  drag.mult(-1);
  drag.normalize();
  drag.normalize();
  drag.mult(dragmagnitude);
  a.applyForce(drag);
}
void keyPressed(){
  if(keyCode == RIGHT){
    a.applyForce(new PVector(0.70,0));
  }
  if(keyCode == LEFT){
    a.applyForce(new PVector(-0.5,0));
  }
  if(keyCode == UP){
    a.applyForce(new PVector(0,-0.95));
  }
  if(keyCode == DOWN){
    a.applyForce(new PVector(0,0.95));
  }
}

Tab two

class mover{
  PVector location;
  PVector velocity;
  PVector acceleration;
  float mass;

  mover(float xLoc, float yLoc){
    location = new PVector(xLoc,yLoc);
    velocity = new PVector(0,0);
    acceleration = new PVector(0,0);
    mass = random(1,6);
  }

  void applyForce(PVector force){
    PVector f = PVector.div(force,mass);
    acceleration.add(f);
  }

  void display(){
    stroke(0);
    fill(255,0,0);
   ellipse(location.x,location.y,20*mass,20*mass);
   fill(0);
   ellipse(location.x,location.y,8*mass,8*mass);
   fill(255);
   ellipse(location.x, location.y, 4*mass, 4*mass);
  }

  void update(){
    velocity.add(acceleration);
    location.add(velocity);
    acceleration.mult(0);
  }

  void checkEdges(){
    if(location.x > width){
      velocity.x *= -1;
    } else if(location.x < 0){
      velocity.x *= -1;
    }

    if(location.y > height){
      velocity.y *= -1;
    } else if(location.y < 0){
      velocity.y *= -1;
    }
  }
}

Tab three

class Space{
  PVector location;
  float mass;

  Space(){
    location = new PVector(random(width), random(height));
    mass = random(0.3, 4.3);
  }

  void display(){
    float size = mass;
    stroke(0);
    fill(255);
    ellipse(location.x, location.y, 1*size, 1*size);
    ellipse(location.x, location.y, 2*size, 2*size);
  }
}