diff options
author | Yuchen Pei <me@ypei.me> | 2017-11-29 12:30:41 +0100 |
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committer | Yuchen Pei <me@ypei.me> | 2017-11-29 12:30:41 +0100 |
commit | a000308104aab27c2dde9a306f1bc654b2db4806 (patch) | |
tree | aecc628e14c1628b5714281437aba18680cdc27b /projects/10/ExpressionLessSquare/Square.jack |
first commit
Diffstat (limited to 'projects/10/ExpressionLessSquare/Square.jack')
-rw-r--r-- | projects/10/ExpressionLessSquare/Square.jack | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/projects/10/ExpressionLessSquare/Square.jack b/projects/10/ExpressionLessSquare/Square.jack new file mode 100644 index 0000000..33a54ad --- /dev/null +++ b/projects/10/ExpressionLessSquare/Square.jack @@ -0,0 +1,99 @@ +// 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/10/ExpressionLessSquare/Square.jack + +/** Expressionless version of projects/10/Square/Square.jack. */ + +class Square { + + field int x, y; + field int size; + + constructor Square new(int Ax, int Ay, int Asize) { + let x = Ax; + let y = Ay; + let size = Asize; + do draw(); + return x; + } + + method void dispose() { + do Memory.deAlloc(this); + return; + } + + method void draw() { + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + return; + } + + method void erase() { + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + return; + } + + method void incSize() { + if (x) { + do erase(); + let size = size; + do draw(); + } + return; + } + + method void decSize() { + if (size) { + do erase(); + let size = size; + do draw(); + } + return; + } + + method void moveUp() { + if (y) { + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + let y = y; + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + } + return; + } + + method void moveDown() { + if (y) { + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + let y = y; + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + } + return; + } + + method void moveLeft() { + if (x) { + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + let x = x; + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + } + return; + } + + method void moveRight() { + if (x) { + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + let x = x; + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + } + return; + } +} |