From a000308104aab27c2dde9a306f1bc654b2db4806 Mon Sep 17 00:00:00 2001 From: Yuchen Pei Date: Wed, 29 Nov 2017 12:30:41 +0100 Subject: first commit --- projects/11/Pong/Ball.jack | 203 +++++++++++++++++++++++++++++++++++++++++ projects/11/Pong/Bat.jack | 103 +++++++++++++++++++++ projects/11/Pong/Main.jack | 20 ++++ projects/11/Pong/PongGame.jack | 137 +++++++++++++++++++++++++++ 4 files changed, 463 insertions(+) create mode 100644 projects/11/Pong/Ball.jack create mode 100644 projects/11/Pong/Bat.jack create mode 100644 projects/11/Pong/Main.jack create mode 100644 projects/11/Pong/PongGame.jack (limited to 'projects/11/Pong') diff --git a/projects/11/Pong/Ball.jack b/projects/11/Pong/Ball.jack new file mode 100644 index 0000000..02e47f9 --- /dev/null +++ b/projects/11/Pong/Ball.jack @@ -0,0 +1,203 @@ +// This file is part of www.nand2tetris.org +// and the book "The Elements of Computing Systems" +// by Nisan and Schocken, MIT Press. +// File name: projects/11/Pong/Ball.jack + +/** + * A graphical ball. Characterized by a screen location and distance of + * last destination. Has methods for drawing, erasing and moving on the screen. + * The ball is displayed as a filled, 6-by-6 pixles rectangle. + */ +class Ball { + + field int x, y; // the ball's screen location (in pixels) + field int lengthx, lengthy; // distance of last destination (in pixels) + + field int d, straightD, diagonalD; // used for straight line movement computation + field boolean invert, positivex, positivey; // (same) + + field int leftWall, rightWall, topWall, bottomWall; // wall locations + + field int wall; // last wall that the ball was bounced off of + + /** Constructs a new ball with the given initial location and wall locations. */ + constructor Ball new(int Ax, int Ay, + int AleftWall, int ArightWall, int AtopWall, int AbottomWall) { + let x = Ax; + let y = Ay; + let leftWall = AleftWall; + let rightWall = ArightWall - 6; // -6 for ball size + let topWall = AtopWall; + let bottomWall = AbottomWall - 6; // -6 for ball size + let wall = 0; + do show(); + return this; + } + + /** Deallocates the Ball's memory. */ + method void dispose() { + do Memory.deAlloc(this); + return; + } + + /** Shows the ball. */ + method void show() { + do Screen.setColor(true); + do draw(); + return; + } + + /** Hides the ball. */ + method void hide() { + do Screen.setColor(false); + do draw(); + return; + } + + /** Draws the ball. */ + method void draw() { + do Screen.drawRectangle(x, y, x + 5, y + 5); + return; + } + + /** Returns the ball's left edge. */ + method int getLeft() { + return x; + } + + /** Returns the ball's right edge. */ + method int getRight() { + return x + 5; + } + + /** Computes and sets the ball's destination. */ + method void setDestination(int destx, int desty) { + var int dx, dy, temp; + let lengthx = destx - x; + let lengthy = desty - y; + let dx = Math.abs(lengthx); + let dy = Math.abs(lengthy); + let invert = (dx < dy); + + if (invert) { + let temp = dx; // swap dx, dy + let dx = dy; + let dy = temp; + let positivex = (y < desty); + let positivey = (x < destx); + } + else { + let positivex = (x < destx); + let positivey = (y < desty); + } + + let d = (2 * dy) - dx; + let straightD = 2 * dy; + let diagonalD = 2 * (dy - dx); + + return; + } + + /** + * Moves the ball one unit towards its destination. + * If the ball has reached a wall, returns 0. + * Else, returns a value according to the wall: + * 1 (left wall), 2 (right wall), 3 (top wall), 4 (bottom wall). + */ + method int move() { + + do hide(); + + if (d < 0) { let d = d + straightD; } + else { + let d = d + diagonalD; + + if (positivey) { + if (invert) { let x = x + 4; } + else { let y = y + 4; } + } + else { + if (invert) { let x = x - 4; } + else { let y = y - 4; } + } + } + + if (positivex) { + if (invert) { let y = y + 4; } + else { let x = x + 4; } + } + else { + if (invert) { let y = y - 4; } + else { let x = x - 4; } + } + + if (~(x > leftWall)) { + let wall = 1; + let x = leftWall; + } + if (~(x < rightWall)) { + let wall = 2; + let x = rightWall; + } + if (~(y > topWall)) { + let wall = 3; + let y = topWall; + } + if (~(y < bottomWall)) { + let wall = 4; + let y = bottomWall; + } + + do show(); + + return wall; + } + + /** + * Bounces off the current wall: sets the new destination + * of the ball according to the ball's angle and the given + * bouncing direction (-1/0/1=left/center/right or up/center/down). + */ + method void bounce(int bouncingDirection) { + var int newx, newy, divLengthx, divLengthy, factor; + + // dividing by 10 first since results are too big + let divLengthx = lengthx / 10; + let divLengthy = lengthy / 10; + if (bouncingDirection = 0) { let factor = 10; } + else { + if (((~(lengthx < 0)) & (bouncingDirection = 1)) | ((lengthx < 0) & (bouncingDirection = (-1)))) { + let factor = 20; // bounce direction is in ball direction + } + else { let factor = 5; } // bounce direction is against ball direction + } + + if (wall = 1) { + let newx = 506; + let newy = (divLengthy * (-50)) / divLengthx; + let newy = y + (newy * factor); + } + else { + if (wall = 2) { + let newx = 0; + let newy = (divLengthy * 50) / divLengthx; + let newy = y + (newy * factor); + } + else { + if (wall = 3) { + let newy = 250; + let newx = (divLengthx * (-25)) / divLengthy; + let newx = x + (newx * factor); + } + else { // assumes wall = 4 + let newy = 0; + let newx = (divLengthx * 25) / divLengthy; + let newx = x + (newx * factor); + } + } + } + + do setDestination(newx, newy); + return; + } +} diff --git a/projects/11/Pong/Bat.jack b/projects/11/Pong/Bat.jack new file mode 100644 index 0000000..340760f --- /dev/null +++ b/projects/11/Pong/Bat.jack @@ -0,0 +1,103 @@ +// This file is part of www.nand2tetris.org +// and the book "The Elements of Computing Systems" +// by Nisan and Schocken, MIT Press. +// File name: projects/11/Pong/Bat.jack + +/** + * A graphical Pong bat. + * Displayed as a filled horizontal rectangle that has + * a screen location, a width and a height. + * Has methods for drawing, erasing, moving left and right, + * and changing its width (to make the hitting action more challenging). + * This class should have been called "paddle", following the + * standard Pong terminology. But, unaware of this terminology, + * we called it "bat", and then decided to stick to it. + */ +class Bat { + + field int x, y; // the bat's screen location + field int width, height; // the bat's width and height + field int direction; // direction of the bat's movement (1 = left, 2 = right) + + /** Constructs a new bat with the given location and width. */ + constructor Bat new(int Ax, int Ay, int Awidth, int Aheight) { + let x = Ax; + let y = Ay; + let width = Awidth; + let height = Aheight; + let direction = 2; + do show(); + return this; + } + + /** Deallocates the object's memory. */ + method void dispose() { + do Memory.deAlloc(this); + return; + } + + /** Shows the bat. */ + method void show() { + do Screen.setColor(true); + do draw(); + return; + } + + /** Hides the bat. */ + method void hide() { + do Screen.setColor(false); + do draw(); + return; + } + + /** Draws the bat. */ + method void draw() { + do Screen.drawRectangle(x, y, x + width, y + height); + return; + } + + /** Sets the bat's direction (0=stop, 1=left, 2=right). */ + method void setDirection(int Adirection) { + let direction = Adirection; + return; + } + + /** Returns the bat's left edge. */ + method int getLeft() { + return x; + } + + /** Returns the bat's right edge. */ + method int getRight() { + return x + width; + } + + /** Sets the bat's width. */ + method void setWidth(int Awidth) { + do hide(); + let width = Awidth; + do show(); + return; + } + + /** Moves the bat one step in the bat's direction. */ + method void move() { + if (direction = 1) { + let x = x - 4; + if (x < 0) { let x = 0; } + do Screen.setColor(false); + do Screen.drawRectangle((x + width) + 1, y, (x + width) + 4, y + height); + do Screen.setColor(true); + do Screen.drawRectangle(x, y, x + 3, y + height); + } + else { + let x = x + 4; + if ((x + width) > 511) { let x = 511 - width; } + do Screen.setColor(false); + do Screen.drawRectangle(x - 4, y, x - 1, y + height); + do Screen.setColor(true); + do Screen.drawRectangle((x + width) - 3, y, x + width, y + height); + } + return; + } +} diff --git a/projects/11/Pong/Main.jack b/projects/11/Pong/Main.jack new file mode 100644 index 0000000..45e2dd2 --- /dev/null +++ b/projects/11/Pong/Main.jack @@ -0,0 +1,20 @@ +// This file is part of www.nand2tetris.org +// and the book "The Elements of Computing Systems" +// by Nisan and Schocken, MIT Press. +// File name: projects/11/Pong/Main.jack + +/** + * The main class of the Pong game. + */ +class Main { + + /** Initializes a Pong game and starts running it. */ + function void main() { + var PongGame game; + do PongGame.newInstance(); + let game = PongGame.getInstance(); + do game.run(); + do game.dispose(); + return; + } +} diff --git a/projects/11/Pong/PongGame.jack b/projects/11/Pong/PongGame.jack new file mode 100644 index 0000000..7e1ae4c --- /dev/null +++ b/projects/11/Pong/PongGame.jack @@ -0,0 +1,137 @@ +// This file is part of www.nand2tetris.org +// and the book "The Elements of Computing Systems" +// by Nisan and Schocken, MIT Press. +// File name: projects/11/Pong/PongGame.jack + +/** + * Represents a Pong game. + */ +class PongGame { + + static PongGame instance; // the singelton, a Pong game instance + field Bat bat; // the bat + field Ball ball; // the ball + field int wall; // the current wall that the ball is bouncing off of. + field boolean exit; // true when the game is over + field int score; // the current score. + field int lastWall; // the last wall that the ball bounced off of. + + // The current width of the bat + field int batWidth; + + /** Constructs a new Pong game. */ + constructor PongGame new() { + do Screen.clearScreen(); + let batWidth = 50; // initial bat size + let bat = Bat.new(230, 229, batWidth, 7); + let ball = Ball.new(253, 222, 0, 511, 0, 229); + do ball.setDestination(400,0); + do Screen.drawRectangle(0, 238, 511, 240); + do Output.moveCursor(22,0); + do Output.printString("Score: 0"); + + let exit = false; + let score = 0; + let wall = 0; + let lastWall = 0; + + return this; + } + + /** Deallocates the object's memory. */ + method void dispose() { + do bat.dispose(); + do ball.dispose(); + do Memory.deAlloc(this); + return; + } + + /** Creates an instance of Pong game, and stores it. */ + function void newInstance() { + let instance = PongGame.new(); + return; + } + + /** Returns the single instance of this Pong game. */ + function PongGame getInstance() { + return instance; + } + + /** Starts the game, and andles inputs from the user that control + * the bat's movement direction. */ + method void run() { + var char key; + + while (~exit) { + // waits for a key to be pressed. + while ((key = 0) & (~exit)) { + let key = Keyboard.keyPressed(); + do bat.move(); + do moveBall(); + do Sys.wait(50); + } + + if (key = 130) { do bat.setDirection(1); } + else { + if (key = 132) { do bat.setDirection(2); } + else { + if (key = 140) { let exit = true; } + } + } + + // Waits for the key to be released. + while ((~(key = 0)) & (~exit)) { + let key = Keyboard.keyPressed(); + do bat.move(); + do moveBall(); + do Sys.wait(50); + } + } + + if (exit) { + do Output.moveCursor(10,27); + do Output.printString("Game Over"); + } + + return; + } + + /** + * Handles ball movement, including bouncing. + * If the ball bounces off a wall, finds its new direction. + * If the ball bounces off the bat, increases the score by one + * and shrinks the bat's size, to make the game more challenging. + */ + method void moveBall() { + var int bouncingDirection, batLeft, batRight, ballLeft, ballRight; + + let wall = ball.move(); + + if ((wall > 0) & (~(wall = lastWall))) { + let lastWall = wall; + let bouncingDirection = 0; + let batLeft = bat.getLeft(); + let batRight = bat.getRight(); + let ballLeft = ball.getLeft(); + let ballRight = ball.getRight(); + + if (wall = 4) { + let exit = (batLeft > ballRight) | (batRight < ballLeft); + if (~exit) { + if (ballRight < (batLeft + 10)) { let bouncingDirection = -1; } + else { + if (ballLeft > (batRight - 10)) { let bouncingDirection = 1; } + } + + let batWidth = batWidth - 2; + do bat.setWidth(batWidth); + let score = score + 1; + do Output.moveCursor(22,7); + do Output.printInt(score); + } + } + do ball.bounce(bouncingDirection); + } + return; + } +} \ No newline at end of file -- cgit v1.2.3