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/Square/Main.jack | 17 ++++++ projects/11/Square/Square.jack | 110 +++++++++++++++++++++++++++++++++++++ projects/11/Square/SquareGame.jack | 81 +++++++++++++++++++++++++++ 3 files changed, 208 insertions(+) create mode 100644 projects/11/Square/Main.jack create mode 100644 projects/11/Square/Square.jack create mode 100644 projects/11/Square/SquareGame.jack (limited to 'projects/11/Square') diff --git a/projects/11/Square/Main.jack b/projects/11/Square/Main.jack new file mode 100644 index 0000000..0753893 --- /dev/null +++ b/projects/11/Square/Main.jack @@ -0,0 +1,17 @@ +// 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/Square/Main.jack + +// (same as projects/09/Square/Main.jack) + +/** Initializes a new Square Dance game and starts running it. */ +class Main { + function void main() { + var SquareGame game; + let game = SquareGame.new(); + do game.run(); + do game.dispose(); + return; + } +} diff --git a/projects/11/Square/Square.jack b/projects/11/Square/Square.jack new file mode 100644 index 0000000..5a92838 --- /dev/null +++ b/projects/11/Square/Square.jack @@ -0,0 +1,110 @@ +// 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/Square/Square.jack + +// (same as projects/09/Square/Square.jack) + +/** Implements a graphical square. */ +class Square { + + field int x, y; // screen location of the square's top-left corner + field int size; // length of this square, in pixels + + /** Constructs a new square with a given location and size. */ + constructor Square new(int Ax, int Ay, int Asize) { + let x = Ax; + let y = Ay; + let size = Asize; + do draw(); + return this; + } + + /** Disposes this square. */ + method void dispose() { + do Memory.deAlloc(this); + return; + } + + /** Draws the square on the screen. */ + method void draw() { + do Screen.setColor(true); + do Screen.drawRectangle(x, y, x + size, y + size); + return; + } + + /** Erases the square from the screen. */ + method void erase() { + do Screen.setColor(false); + do Screen.drawRectangle(x, y, x + size, y + size); + return; + } + + /** Increments the square size by 2 pixels. */ + method void incSize() { + if (((y + size) < 254) & ((x + size) < 510)) { + do erase(); + let size = size + 2; + do draw(); + } + return; + } + + /** Decrements the square size by 2 pixels. */ + method void decSize() { + if (size > 2) { + do erase(); + let size = size - 2; + do draw(); + } + return; + } + + /** Moves the square up by 2 pixels. */ + method void moveUp() { + if (y > 1) { + do Screen.setColor(false); + do Screen.drawRectangle(x, (y + size) - 1, x + size, y + size); + let y = y - 2; + do Screen.setColor(true); + do Screen.drawRectangle(x, y, x + size, y + 1); + } + return; + } + + /** Moves the square down by 2 pixels. */ + method void moveDown() { + if ((y + size) < 254) { + do Screen.setColor(false); + do Screen.drawRectangle(x, y, x + size, y + 1); + let y = y + 2; + do Screen.setColor(true); + do Screen.drawRectangle(x, (y + size) - 1, x + size, y + size); + } + return; + } + + /** Moves the square left by 2 pixels. */ + method void moveLeft() { + if (x > 1) { + do Screen.setColor(false); + do Screen.drawRectangle((x + size) - 1, y, x + size, y + size); + let x = x - 2; + do Screen.setColor(true); + do Screen.drawRectangle(x, y, x + 1, y + size); + } + return; + } + + /** Moves the square right by 2 pixels. */ + method void moveRight() { + if ((x + size) < 510) { + do Screen.setColor(false); + do Screen.drawRectangle(x, y, x + 1, y + size); + let x = x + 2; + do Screen.setColor(true); + do Screen.drawRectangle((x + size) - 1, y, x + size, y + size); + } + return; + } +} diff --git a/projects/11/Square/SquareGame.jack b/projects/11/Square/SquareGame.jack new file mode 100644 index 0000000..4fe7e39 --- /dev/null +++ b/projects/11/Square/SquareGame.jack @@ -0,0 +1,81 @@ +// 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/Square/SquareGame.jack + +// (same as projects/09/Square/SquareGame.jack) + +/** + * Implements the Square Dance game. + * This simple game allows the user to move a black square around + * the screen, and change the square's size during the movement. + * When the game starts, a square of 30 by 30 pixels is shown at the + * top-left corner of the screen. The user controls the square as follows. + * The 4 arrow keys are used to move the square up, down, left, and right. + * The 'z' and 'x' keys are used, respectively, to decrement and increment + * the square's size. The 'q' key is used to quit the game. + */ + +class SquareGame { + field Square square; // the square of this game + field int direction; // the square's current direction: + // 0=none, 1=up, 2=down, 3=left, 4=right + + /** Constructs a new Square Game. */ + constructor SquareGame new() { + // Creates a 30 by 30 pixels square and positions it at the top-left + // of the screen. + let square = Square.new(0, 0, 30); + let direction = 0; // initial state is no movement + return this; + } + + /** Disposes this game. */ + method void dispose() { + do square.dispose(); + do Memory.deAlloc(this); + return; + } + + /** Moves the square in the current direction. */ + method void moveSquare() { + if (direction = 1) { do square.moveUp(); } + if (direction = 2) { do square.moveDown(); } + if (direction = 3) { do square.moveLeft(); } + if (direction = 4) { do square.moveRight(); } + do Sys.wait(5); // delays the next movement + return; + } + + /** Runs the game: handles the user's inputs and moves the square accordingly */ + method void run() { + var char key; // the key currently pressed by the user + var boolean exit; + let exit = false; + + while (~exit) { + // waits for a key to be pressed + while (key = 0) { + let key = Keyboard.keyPressed(); + do moveSquare(); + } + if (key = 81) { let exit = true; } // q key + if (key = 90) { do square.decSize(); } // z key + if (key = 88) { do square.incSize(); } // x key + if (key = 131) { let direction = 1; } // up arrow + if (key = 133) { let direction = 2; } // down arrow + if (key = 130) { let direction = 3; } // left arrow + if (key = 132) { let direction = 4; } // right arrow + + // waits for the key to be released + while (~(key = 0)) { + let key = Keyboard.keyPressed(); + do moveSquare(); + } + } // while + return; + } +} + + + -- cgit v1.2.3