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- //
- // breakout.c
- //
- // Computer Science 50
- // Problem Set 3
- //
- // standard libraries
- #define _XOPEN_SOURCE
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <time.h>
- // Stanford Portable Library
- #include <spl/gevents.h>
- #include <spl/gobjects.h>
- #include <spl/gwindow.h>
- // height and width of game's window in pixels
- #define HEIGHT 600
- #define WIDTH 400
- #define PADDLEHEIGHT 20
- #define PADDLEWIDTH 100
- // number of rows of bricks
- #define ROWS 5
- // number of columns of bricks
- #define COLS 10
- // radius of ball in pixels
- #define RADIUS 10
- // lives
- #define LIVES 3
- // prototypes
- void initBricks(GWindow window);
- GOval initBall(GWindow window);
- GRect initPaddle(GWindow window);
- GLabel initScoreboard(GWindow window);
- void updateScoreboard(GWindow window, GLabel label, int points);
- GObject detectCollision(GWindow window, GOval ball);
- int lives = LIVES;
- int points = 0;
- int main(void)
- {
- // seed pseudorandom number generator
- srand48(time(NULL));
- // instantiate window
- GWindow window = newGWindow(WIDTH, HEIGHT);
- // instantiate bricks
- initBricks(window);
- // instantiate ball, centered in middle of window
- GOval ball = initBall(window);
- // instantiate paddle, centered at bottom of window
- GRect paddle = initPaddle(window);
- // instantiate scoreboard, centered in middle of window, just above ball
- GLabel label = initScoreboard(window);
- // number of bricks initially
- int bricks = COLS * ROWS;
- double velocity = drand48();
- double velocityY = 2;
- // keep playing until game over
- while (lives >0 && points < 50)
- {
- GEvent event = getNextEvent(MOUSE_EVENT);
- if(event !=NULL)
- {
- if(getEventType(event) == MOUSE_MOVED)
- {
- double x = getX(event) - getWidth(paddle)/2;
- double y=500;
- setLocation(paddle,x,y);
- }
- }
- move(ball,velocity,velocityY);
- if (getX(ball) + getWidth(ball) >= getWidth(window))
- {
- velocity = -velocity;
- }
- else if (getY(ball) <= 0)
- {
- velocityY = - velocityY;
- }
- else if (getX(ball) <=0)
- {
- velocity = -velocity;
- }
- else if (getY(ball)+ getHeight(ball) >= getHeight(window))
- {
- lives = lives - 1;
- waitForClick();
- setLocation(ball,190,290);
- setLocation(paddle,150,500);
- }
- GObject object = detectCollision(window,ball);
- if (object == paddle)
- {
- velocityY = -velocityY;
- }
- if (object != NULL)
- {
- if (strcmp(getType(object),"GRect") == 0 && object != paddle && object != label)
- {
- removeGWindow(window,object);
- velocityY = -velocityY;
- points = points+1;
- updateScoreboard (window, label, points);
- }
- }
- pause(10);
- }
- waitForClick();
- // game over
- closeGWindow(window);
- return 0;
- }
- /**
- * Initializes window with a grid of bricks.
- */
- void initBricks(GWindow window)
- {
- int i, j, y;
- int x = -38;
- for( j = 0; j < COLS ;j++)
- {
- x = x+40;
- y = 40;
- GRect brick = newGRect(x,y,36,10);
- add (window, brick);
- setColor(brick,"PINK");
- setFilled(brick,true);
- for(int i = 0; i< ROWS -1 ;i++)
- {
- y = y + 12;
- GRect brick = newGRect(x,y,36,10);
- add(window,brick);
- if(i == 0)
- {
- setColor(brick,"RED");
- setFilled(brick,true);
- }
- if (i==1)
- {
- setColor(brick,"ORANGE");
- setFilled(brick,true);
- }
- if (i == 2)
- {
- setColor(brick,"YELLOW");
- setFilled(brick,true);
- }
- if(i == 3)
- {
- setColor(brick,"GREEN");
- setFilled(brick, true);
- }
- }
- }
- }
- /**
- * Instantiates ball in center of window. Returns ball.
- */
- GOval initBall(GWindow window)
- {
- GOval ball = newGOval(175,245,20,20);
- add(window,ball);
- setColor(ball,"black");
- setFilled(ball,true);
- return ball;
- }
- /**
- * Instantiates paddle in bottom-middle of window.
- */
- GRect initPaddle(GWindow window)
- {
- GRect paddle =newGRect(135,520,PADDLEWIDTH,PADDLEHEIGHT);
- add(window,paddle);
- setColor(paddle,"black");
- setFilled(paddle,true);
- return paddle;
- }
- /**
- * Instantiates, configures, and returns label for scoreboard.
- */
- GLabel initScoreboard(GWindow window)
- {
- GLabel label = newGLabel (" ");
- add (window,label);
- setLocation(label,100,100);
- setFont(label,"Arial-20");
- return label;
- }
- /**
- * Updates scoreboard's label, keeping it centered in window.
- */
- void updateScoreboard(GWindow window, GLabel label, int points)
- {
- // update label
- char s[12];
- sprintf(s, "%i", points);
- setLabel(label, s);
- // center label in window
- double x = (getWidth(window) - getWidth(label)) / 2;
- double y = (getHeight(window) - getHeight(label)) / 2;
- setLocation(label, x, y);
- }
- /**
- * Detects whether basll has collided with some object in window
- * by checking the four corners of its bounding box (which are
- * outside the ball's GOval, and so the ball can't collide with
- * itself). Returns object if so, else NULL.
- */
- GObject detectCollision(GWindow window, GOval ball)
- {
- // ball's location
- double x = getX(ball);
- double y = getY(ball);
- // for checking for collisions
- GObject object;
- // check for collision at ball's top-left corner
- object = getGObjectAt(window, x, y);
- if (object != NULL)
- {
- return object;
- }
- // check for collision at ball's top-right corner
- object = getGObjectAt(window, x + 2 * RADIUS, y);
- if (object != NULL)
- {
- return object;
- }
- // check for collision at ball's bottom-left corner
- object = getGObjectAt(window, x, y + 2 * RADIUS);
- if (object != NULL)
- {
- return object;
- }
- // check for collision at ball's bottom-right corner
- object = getGObjectAt(window, x + 2 * RADIUS, y + 2 * RADIUS);
- if (object != NULL)
- {
- return object;
- }
- // no collision
- return NULL;
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