import controlP5.*;
import processing.serial.*;

PImage img;
int iW2, iH2;
int posX, posY;
int velocity, angle;
Serial serial;


void setup() {
  // tamaño de la ventana
  size(800, 600);
  // carga la imagen en la variable
  img = loadImage("spaceship02.gif");
  iW2 = img.width/2;
  iH2 = img.height/2;
  posX = (width/2)-iW2;
  posY = (height/2)-iH2;
  velocity = -5;
  angle = 0;
}

void draw() {
  // limpia la ventana
  background(0);
  posX += velocity * sin(radians(angle));
  if (posX-iW2 < 0) posX = width;
  if (posX-iW2 > width) posX = iW2;
  posY += velocity * cos(radians(angle));
  if (posY-iH2 < 0) posY = height;
  if (posY-iH2 > height) posY = iH2;
  // dibuja la imagen
  pushMatrix();
  translate(posX-iW2, posY-iH2);
  rotate(radians(-angle));
  image(img, -iW2, -iH2);
  popMatrix();
}

void keyPressed() {
  if (key == CODED) {
    if (keyCode == UP)
      velocity -= 5;
    if (keyCode == DOWN)
      velocity += 5;
    if (keyCode == LEFT)
      angle += 5;
    if (keyCode == RIGHT)
      angle -= 5;
  }
}