100 lines
2 KiB
Text
100 lines
2 KiB
Text
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// This file is part of www.nand2tetris.org
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// and the book "The Elements of Computing Systems"
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// by Nisan and Schocken, MIT Press.
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/// File name: projects/10/ExpressionLessSquare/Square.jack
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/** Expressionless version of projects/10/Square/Square.jack. */
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class Square {
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field int x, y;
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field int size;
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constructor Square new(int Ax, int Ay, int Asize) {
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let x = Ax;
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let y = Ay;
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let size = Asize;
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do draw();
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return x;
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}
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method void dispose() {
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do Memory.deAlloc(this);
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return;
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}
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method void draw() {
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do Screen.setColor(x);
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do Screen.drawRectangle(x, y, x, y);
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return;
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}
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method void erase() {
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do Screen.setColor(x);
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do Screen.drawRectangle(x, y, x, y);
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return;
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}
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method void incSize() {
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if (x) {
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do erase();
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let size = size;
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do draw();
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}
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return;
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}
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method void decSize() {
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if (size) {
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do erase();
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let size = size;
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do draw();
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}
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return;
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}
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method void moveUp() {
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if (y) {
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do Screen.setColor(x);
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do Screen.drawRectangle(x, y, x, y);
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let y = y;
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do Screen.setColor(x);
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do Screen.drawRectangle(x, y, x, y);
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}
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return;
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}
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method void moveDown() {
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if (y) {
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do Screen.setColor(x);
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do Screen.drawRectangle(x, y, x, y);
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let y = y;
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do Screen.setColor(x);
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do Screen.drawRectangle(x, y, x, y);
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}
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return;
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}
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method void moveLeft() {
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if (x) {
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do Screen.setColor(x);
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do Screen.drawRectangle(x, y, x, y);
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let x = x;
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do Screen.setColor(x);
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do Screen.drawRectangle(x, y, x, y);
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}
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return;
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}
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method void moveRight() {
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if (x) {
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do Screen.setColor(x);
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do Screen.drawRectangle(x, y, x, y);
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let x = x;
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do Screen.setColor(x);
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do Screen.drawRectangle(x, y, x, y);
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}
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return;
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}
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}
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