Modify a text file: $/guydog3.java

$/guydog3.java

//////// Guy and dog, plus birds. ////////
// bam:2907a //

//// GLOBAL DATA ////
int birdX=100, birdY=100;  // Initial position of bird
int birdDX=20;
int sunX=100, sunY=100;  // Position of sun

boolean eastbound=true;

void setup() {
  size( 800, 600 );
  smooth();
  frameRate(5);
}

void draw() {
  //// Move and show everything //
  scene();
  bird();
  guy();
  dog();
}

void scene() {
  //// Sky, sun, grass.
  background( 150, 200, 255 );    // Sky
  //// Move the sun.
  sunX = (sunX+5) % width;
  sunY =  (int) (   100 - 100*sin( PI*( sunX/width ) )   );

text( "@@@ sun:  "+sunX+","+sunY, 600, 50 );
  float  xw=  sunX/width;
  text( "@@@ x/w:  "+xw, 600, 70 );
  float  sinyy=  100*sin( PI*( sunX/width ) );
  text( "@@@ sin(PI*x/w):  "+sinyy, 600, 90 );
  //// Draw the sun
  fill( 255, 255, 0 );        // Sun
  ellipse( sunX, sunY, 40, 40 );
  //// Grass
  fill( 100, 255, 100 );
  rectMode( CORNERS);
  rect( 0, height/3, width, height );
}

void bird() {
  //// Bird flies across screen.  (Press key to drop load.)
  birdX = birdX + birdDX;
  birdX = birdX % width;
  birdY = birdY + 10 - (int) random( 20 );
  fill( 200, 100, 200, 150 );
  triangle( birdX,birdY, birdX-50,birdY-15, birdX-50,birdY+15 );
  if (birdY >150){
    birdY = birdY - 5;
  }
  else if (birdY <-200){
    birdY= birdY - 10;
  }
}

void guy() {
  //// Guy follows mouse.
  fill( 0,0,255 );        // Blue shirt
  rectMode( CENTER );
  rect( mouseX, mouseY, 60, 80 );
  fill( 255, 200, 200 );        // Pink face
  ellipseMode( CENTER );
  ellipse( mouseX, mouseY-40-15, 30,30 );
  // +++ add a hat?
  //// Eye.
  fill(0,0,255);
  if (eastbound) {
      ellipse( mouseX+10, mouseY-40-20, 5,5 );
  } else {
      ellipse( mouseX-10, mouseY-40-20, 5,5 );
  }
}

void dog() {
  if (pmouseX < mouseX) eastbound=true;
  else if (pmouseX > mouseX) eastbound=false;
  else {}    // No change if =
  
  //// Dog chases guy.
  //dog is on the right
  if ( ! eastbound){
    int dogX=pmouseX-50;
    int dogY=pmouseY+100;
    dogX = dogX + 5*( pmouseX-mouseX );
    dogY = dogY + 2*( pmouseY-mouseY );
    fill( 150, 50, 50 );
    rectMode( CORNER );
    rect( dogX+80, dogY, 40, 20 );
    rect( dogX+70, dogY-10, 20, 10 );
  }  
  //dog is on the left
  else {
    int dogX=pmouseX-70;
    int dogY=pmouseY+100;
    dogX = dogX + 5*( pmouseX-mouseX );
    dogY = dogY + 2*( pmouseY-mouseY );
    fill( 150, 50, 50 );
    rectMode( CORNER );
    rect( dogX, dogY, 40, 20 );
    rect( dogX+30, dogY-10, 20, 10 );
  }

}