From d3a0cc3a8ba6dfeb64d3faeffdeb6845b60e5840 Mon Sep 17 00:00:00 2001
From: Yuchen Pei <me@ypei.me>
Date: Sat, 20 Jan 2018 15:41:49 +0100
Subject: rearranged the dir for github

- removed tools and pdfs
- rearranged the projects dirs
- added md files
- other minor changes
---
 projects/12/ScreenTest/Screen.jack | 138 -------------------------------------
 1 file changed, 138 deletions(-)
 delete mode 100644 projects/12/ScreenTest/Screen.jack

(limited to 'projects/12/ScreenTest/Screen.jack')

diff --git a/projects/12/ScreenTest/Screen.jack b/projects/12/ScreenTest/Screen.jack
deleted file mode 100644
index a370ab9..0000000
--- a/projects/12/ScreenTest/Screen.jack
+++ /dev/null
@@ -1,138 +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/12/Screen.jack
-
-/**
- * A library of functions for displaying graphics on the screen.
- * The Hack physical screen consists of 512 rows (indexed 0..511, top to bottom)
- * of 256 pixels each (indexed 0..255, left to right). The top left pixel on 
- * the screen is indexed (0,0).
- */
-class Screen {
-    static Array twoToThe;
-    static Array screen;
-    static boolean color;
-
-    /** Initializes the Screen. */
-    function void init() {
-        var int i, x;
-        let x = 1;
-        let i = 0;
-        let twoToThe = Array.new(16);
-        while (i < 16){
-            let twoToThe[i] = x;
-            let x = x + x;
-            let i = i + 1;
-        }
-        let screen = 16384;
-        let color = true;
-        return;
-    }
-
-    /** Erases the entire screen. */
-    function void clearScreen() {
-        var boolean c;
-        let c = color;
-        let color = false;
-        do Screen.drawRectangle(0, 0, 511, 255);
-        let color = c;
-        return;
-    }
-
-    /** Sets the current color, to be used for all subsequent drawXXX commands.
-     *  Black is represented by true, white by false. */
-    function void setColor(boolean b) {
-        let color = b;
-        return;
-    }
-
-    /** Draws the (x,y) pixel, using the current color. */
-    function void drawPixel(int x, int y) {
-        var int addr, t;
-        if ((x < 0) | (y < 0) | (x > 511) | (y > 255)) {
-            //String.println("drawPixel: coordinates out of range!");
-            //Sys.error(2);
-            return;
-        }
-        let t = x / 16;
-        let addr = 32 * y + t;
-        if (color) {
-            let screen[addr] = screen[addr] | twoToThe[x - (t * 16)];
-        } else {
-            let screen[addr] = screen[addr] & (- (twoToThe[x - (t * 16)] + 1));
-        }
-        return;
-    }
-
-    /** Draws a line from pixel (x1,y1) to pixel (x2,y2), using the current color. */
-    function void drawLine(int x1, int y1, int x2, int y2) {
-        var int dx, dy, x, y, a, b, diff;
-        let x = x1;
-        let y = y1;
-        do Screen.drawPixel(x, y);
-        if (x1 = x2) {
-            if (y1 = y2) {
-                return;
-            } else {
-                let diff = 1;
-            }
-        } else {
-            if (y1 = y2) {
-                let diff = -1;
-            } else {
-                let diff = 0;
-            }
-        }
-        let dx = x2 - x1;
-        let dy = y2 - y1;
-        let a = Math.sign(dx);
-        let b = Math.sign(dy);
-        let dx = Math.abs(dx);
-        let dy = Math.abs(dy);
-        while (~((x = x2) & (y = y2))) {
-            if (diff < 0){
-                let x = x + a;
-                let diff = diff + dy;
-            } else {
-                let y = y + b;
-                let diff = diff - dx;
-            }
-            do Screen.drawPixel(x, y);
-        }
-        return;
-    }
-
-    /** Draws a filled rectangle whose top left corner is (x1, y1)
-     * and bottom right corner is (x2,y2), using the current color. */
-    function void drawRectangle(int x1, int y1, int x2, int y2) {
-        var int x;
-        if ((x1 > x2) | (y1 > y2)) {
-            return;
-        }
-        let x = x1;
-        while (~(x > x2)) {
-            do Screen.drawLine(x, y1, x, y2);
-            let x = x + 1;
-        }
-        return;
-    }
-
-    /** Draws a filled circle of radius r<=181 around (x,y), using the current color. */
-    function void drawCircle(int x, int y, int r) {
-        var int dx, dy, r2;
-        if (r > 181) {
-            do String.println("drawCircle: radius too big!");
-            do Sys.error(2);
-            return;
-        }
-        let dy = -r;
-        let r2 = r * r;
-        while (~(dy > r)) {
-            let dx = Math.sqrt(r2 - (dy * dy));
-            do Screen.drawLine(x - dx, y + dy, x + dx, y + dy);
-            let dy = dy + 1;
-        }
-        return;
-    }
-}
-- 
cgit v1.2.3