Modify a text file: $/project4b.java

$/project4b.java

//// Bouncing ball within a box.

String title="Bouncing ball within a box.";
String news="";
String last="";
String author="B.A.Martin, CST112, Project 4b";
int counter=0;      
int score=0;

float left=50, top=50, right=550, bottom=350;  // table boundaries.

float ballR, ballG, ballB;                    // Ball color.
float ballX=left, ballY=top+5, ballDX=3, ballDY=2;

float redX=left+30, redY=top+30, redDX=3, redDY=2;
float greenX=left+30, greenY=top+30, greenDX=3, greenDY=2;
float blueX=left+60, blueY=top+60, blueDX=3, blueDY=2;

void setup() {
  //// Set up frame size, etc.  
  size( 600, 400 );
  reset();
}
void reset() {
    ballDX=  random(10);
    ballDY=  random(4);
    ballR=  random(255);
    ballG=  random(255);
    ballB=  random(255);
    counter=0;              // Zero out the frame count.    
    redX=  random(left,right);
    redY=  random(top,bottom);
    greenX=  random(left,right);
    greenY=  random(top,bottom);
    blueX=  random(left,right);
    blueY=  random(top,bottom);
}

void draw() {                                                                             
  // Draw the next frame.
  scene();    // new scene (bg + text )
  table();
  action();
}// draw() //

void scene() {
    background( 255, 220, 220 );        // RED, GREEN, BLUE
    // Messages.
    text( news, width/4, 40 );
    fill(0);
    text( title, width/4, 20 );
    text( author, 20, height-30 );
    text( "Frame number "+counter, width/2, height-20 );
    text( "SCORE:  "+score, width-100, 20 );
    text( last, width-100, 40 );
    //// Now draw the table.
}// scene() //

void table() {
  //// Rectangular table.
  fill( 220,230,255 );
  stroke(0);
  strokeWeight(4);
  rectMode(CORNERS);
  rect( left, top, right, bottom );
}
void action() {
  //// 0.7:  Action! ////
  mickey();
  myball();
  others();
  collisions();
  counter++;
}
void mickey() {
  //// Move and draw my ball.
  fill( 255,127,0);
  rectMode(CENTER);
  noStroke();
  rect( mouseX, mouseY, 50, 90 );
  fill( 255,255,255 );
  ellipse( mouseX-12, mouseY-30, 10,10 );
  ellipse( mouseX+12, mouseY-30, 10,10 );
  fill( 0,0,255 );
  ellipse( mouseX-12, mouseY-30, 5,5 );
  ellipse( mouseX+12, mouseY-30, 5,5 );
  fill(0,0,255);
  text( "Mickey", mouseX-20, mouseY+20 );
  if (score<0) fill(255,0,0);
  else if (score>100) fill(0,0,255);
  else fill( 255,127,0);                  // Low score is invisible (same as bg)
  text( score, mouseX-20, mouseY+40 );
  fill( 0 );
  ellipse( mouseX-25, mouseY-50, 25,25 );
  ellipse( mouseX+25, mouseY-50, 25,25 );
}

void myball() {
  //// 0.8:  Action! ////   
  ballX += ballDX;
  ballY += ballDY;
  if (ballX < left || ballX > right) ballDX=  -ballDX;
  if (ballY < top || ballY > bottom) ballDY=  -ballDY;

fill( ballR, ballG, ballB );
  stroke( 255-ballR, 255-ballG, 255-ballB );    // Contrast
  ellipseMode(CENTER);
  ellipse( ballX, ballY, 25,25 );                                                                          
  noStroke();
}
void others() {
  //// 3 more balls ////
  ellipseMode(CENTER);
  noStroke();
  //// Red ball.   
  fill(255,0,0);
  redX += redDX;
  redY += redDY;
  if (redX < left || redX > right) redDX=  -redDX;
  if (redY < top || redY > bottom) redDY=  -redDY;
  ellipse( redX, redY, 15,15 );                                                                          
  //// Green ball.   
  fill(0,150,0);
  greenX += greenDX;
  greenY += greenDY;
  if (greenX < left || greenX > right) greenDX=  -greenDX;
  if (greenY < top || greenY > bottom) greenDY=  -greenDY;
  ellipse( greenX, greenY, 15,15 );                                                                          
  //// Blue ball.   
  fill(0,0,255);
  blueX += blueDX;
  blueY += blueDY;
  if (blueX < left || blueX > right) blueDX=  -blueDX;
  if (blueY < top || blueY > bottom) blueDY=  -blueDY;
  ellipse( blueX, blueY, 15,15 );                                                                          
}

void collisions() {
  //// Detect collisions.
  if ( dist( ballX, ballY, mouseX, mouseY )  <  20 ) {
    score -= 50;
    last=  "BALL HIT MICKEY!!!!";
    //// Swap velocities.
    ballDX=  -ballDX;
    ballDY=  -ballDY;
    ballX += 2*ballDX;    // Bounce away!
    ballY += 2*ballDY;
  }
  if ( dist( ballX, ballY, redX, redY )  <  20 ) {
    score += 10;
    last=  "RED";
    //// Swap velocities.
    float dx=ballDX, dy=ballDY;
    ballDX=  redDX;
    ballDY=  redDY;
    redDX=  dx;
    redDY=  dy;
  }
  if ( dist( ballX, ballY, greenX, greenY )  <  20 ) {
    score += 20;
    last="GREEN";
    //// Swap velocities.
    float dx=ballDX, dy=ballDY;
    ballDX=  greenDX;
    ballDY=  greenDY;
    greenDX=  dx;
    greenDY=  dy;
  }
  if ( dist( ballX, ballY, blueX, blueY )  <  20 ) {
    score += 30;
    last="BLUE";
    //// Swap velocities.
    float dx=ballDX, dy=ballDY;
    ballDX=  blueDX;
    ballDY=  blueDY;
    blueDX=  dx;
    blueDY=  dy;
  }
}

//// EVENT HANDLERS ////
void mousePressed() {
  if ( mouseX>left && mouseX<right && mouseY>top && mouseY<bottom ) {
    news=  "(Click inside box, for new ball)";
    //// Start new ball here! ////
    ballX=  mouseX+50;
    ballY=  mouseY;
    reset();
  } else {
    // Ignore mouse clicks outside of box.
    background(255,0,0);
    news=  "CLICK MOUSE WITHIN BOX, ONLY!";
    score--;
  }
  last="";
}

void keyPressed() {
    //// Event handler for keyboard.
        background(255,0,0);
    if (key=='r') reset();
    if (key=='q') exit();
}