diff options
author | Yuchen Pei <me@ypei.me> | 2018-01-20 15:41:49 +0100 |
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committer | Yuchen Pei <me@ypei.me> | 2018-01-20 15:41:49 +0100 |
commit | d3a0cc3a8ba6dfeb64d3faeffdeb6845b60e5840 (patch) | |
tree | d58df9ec2480e2a9ec6240f9c797f83d1a0b1056 /projects/09/Square/Square.jack | |
parent | 3571f998b28fbc8d9250ba04c983935f10a16c15 (diff) |
rearranged the dir for github
- removed tools and pdfs
- rearranged the projects dirs
- added md files
- other minor changes
Diffstat (limited to 'projects/09/Square/Square.jack')
-rw-r--r-- | projects/09/Square/Square.jack | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/projects/09/Square/Square.jack b/projects/09/Square/Square.jack deleted file mode 100644 index 38066e5..0000000 --- a/projects/09/Square/Square.jack +++ /dev/null @@ -1,108 +0,0 @@ -// 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/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; - } -} |