100 lines
2.0 KiB
Plaintext
100 lines
2.0 KiB
Plaintext
// 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;
|
|
}
|
|
}
|