Fly_on_a_Wall

float x, y; //defining of the variables as floats since decimals are used in the software 

float x_velocity, y_velocity;

float gravity;

float radius;

void setup()

{

size(600, 300);

x = 2; //sets the flies horizontal starting pixel

y = 10; //sets the flys vertical starting pixel

x_velocity = 10;//horizontal velocity preset

y_velocity = 20; //vertical velocity preset

gravity = .3; //defines the increase per cycle to the y value used later

radius = 10; //radius of the ellipse

}

void draw()

{

background(200);

 y_velocity += gravity; //constantly ad to the y value, moving it downwarsd on the canvas acting liek gravity

 x += x_velocity ;// make th efly constantly moving to the right

 y += y_velocity ; //the fly is constantly accelerating 

  if ( y>(height-radius) ) //when the fly hits the bottom of the screen this statement makes it bounce back

  {

  y = height-radius;//stops the fly moving any more in its original direction

  y_velocity *= -0.7;

  }

    if ( x<radius ) //makes the fly bounce off the left wall at the distance of the radius of the ellipse that makes the fly

    {

    x = radius;

    x_velocity *= -0.5;

    }

  if ( x>(width-radius) ) //if the fly touched the right side fo the screen it will be cicked into the opposite direction

  {

  x = width-radius; //sets the flys cordinates to the side fo the canvas, essentially stoping it form moving anymore in the original direction

  x_velocity *= -0.5;

  }

  if(y<(0+radius)){ //when the fly touched the top of the canvas at its radius, it will bounce downwards 

    y=0+radius;//stops the fly at the contact position

    y_velocity*=-.5;

  }

  if(mousePressed == true){ //when the mouse is clicked the fly will accelerate

    y+=.5;

    y_velocity*=1.1; //its vertical velocity will get a large kick

    x+=random(-.4,.7); //the fly will jump to the left or right depending on hoe long you hold the mouse

    x_velocity*=1.1; //moves the fly to the right

  }

  if( mouseButton == RIGHT){ //when the mouse is right clicked the fly will be drawn in the top left corner

    x=0;

    y=0;

    x_velocity += 2.1; //pushes the fly to the right so it won't drop and get stuck in verticle motion 

  }

  fly(x,y); //Calls the fly function with the parameters of x and y decided above

  }

  void ball(float x, float y) //defining a ball function originally used in the code but now subsituted with a fly

  {

  pushMatrix();//isolates the translatio neffects to just the objects enclosed 

  translate(x, y); //make the origin that the ball is drawn in the variables x and y

  ellipseMode(RADIUS); //sets the cordinate system of the ball to the center of the circle 

  ellipse(0, 0, radius, radius); //draws the ellipse with respects to the translated cordinates

  popMatrix();

  }

void fly(float x, float y){//defiens the fly finction and gives it the arguments of x and y, the values it will be expecting when called

  ellipseMode(CENTER); //sets the cordinates of the ellipses to the center of the ellipse so the two move correctly

  ellipse(x,y,5,20);//wings

  fill(0);//fills the fly in black

  ellipse(x,y,10,13);//body

}

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