diff options
| author | Yuchen Pei <me@ypei.me> | 2018-01-17 12:01:40 +0100 |
|---|---|---|
| committer | Yuchen Pei <me@ypei.me> | 2018-01-17 12:01:40 +0100 |
| commit | fef36fd11c9d3d7f632098c5005bf0e3e5ce5ad9 (patch) | |
| tree | ef7348a6d97b0fb5588dbfebe3b5242f31aab255 | |
| parent | 3a9265774c48865547702fe58d127c9fe10338a1 (diff) | |
finished Screen.
- a bit slow though
| -rw-r--r-- | projects/12/MathTest/Math.jack | 12 | ||||
| -rw-r--r-- | projects/12/MathTest/Math.vm | 26 | ||||
| -rw-r--r-- | projects/12/Screen.jack | 91 | ||||
| -rw-r--r-- | projects/12/ScreenTest/Main.vm | 104 | ||||
| -rw-r--r-- | projects/12/ScreenTest/Math.jack | 158 | ||||
| -rw-r--r-- | projects/12/ScreenTest/Math.vm | 472 | ||||
| -rw-r--r-- | projects/12/ScreenTest/Screen.jack | 138 | ||||
| -rw-r--r-- | projects/12/ScreenTest/Screen.vm | 407 |
8 files changed, 1408 insertions, 0 deletions
diff --git a/projects/12/MathTest/Math.jack b/projects/12/MathTest/Math.jack index 6bac42e..01bce8f 100644 --- a/projects/12/MathTest/Math.jack +++ b/projects/12/MathTest/Math.jack @@ -28,6 +28,18 @@ class Math { return ~(x & twoToThe[i] = 0);
}
+ function int sign(int x) {
+ if (x > 0) {
+ return 1;
+ } else {
+ if (x < 0) {
+ return -1;
+ } else {
+ return 0;
+ }
+ }
+ }
+
/** Returns the absolute value of x. */
function int abs(int x) {
if (x > 0){
diff --git a/projects/12/MathTest/Math.vm b/projects/12/MathTest/Math.vm index dad8ff5..513fc1a 100644 --- a/projects/12/MathTest/Math.vm +++ b/projects/12/MathTest/Math.vm @@ -44,6 +44,32 @@ push constant 0 eq not return +function Math.sign 0 +push argument 0 +push constant 0 +gt +if-goto IF_TRUE0 +goto IF_FALSE0 +label IF_TRUE0 +push constant 1 +return +goto IF_END0 +label IF_FALSE0 +push argument 0 +push constant 0 +lt +if-goto IF_TRUE1 +goto IF_FALSE1 +label IF_TRUE1 +push constant 1 +neg +return +goto IF_END1 +label IF_FALSE1 +push constant 0 +return +label IF_END1 +label IF_END0 function Math.abs 0 push argument 0 push constant 0 diff --git a/projects/12/Screen.jack b/projects/12/Screen.jack index 7356d35..337a7e2 100644 --- a/projects/12/Screen.jack +++ b/projects/12/Screen.jack @@ -10,34 +10,125 @@ * 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;
+ return;
}
/** Erases the entire screen. */
function void clearScreen() {
+ var boolean c;
+ let c = color;
+ let color = false;
+ do 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, diff;
+ let x = x1;
+ let y = y1;
+ do 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 drawPixel(x, y);
+ }
}
/** 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) {
+ if ((x1 > x2) | (y1 > y2)) {
+ return;
+ }
+ let x = x1;
+ while (~(x > x2)) {
+ do drawLine(x, y1, x, y2);
+ }
+ 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) {
+ String.println("drawCircle: radius too big!");
+ Sys.error(2);
+ return;
+ }
+ let dy = -r;
+ let r2 = r * r;
+ while (~(dy > r)) {
+ let dx = Math.sqrt(r2 - (dy * dy));
+ do drawLine(x - dx, y + dy, x + dx, y + dy);
+ let dy = dy + 1;
+ }
+ return;
}
}
diff --git a/projects/12/ScreenTest/Main.vm b/projects/12/ScreenTest/Main.vm new file mode 100644 index 0000000..69e860f --- /dev/null +++ b/projects/12/ScreenTest/Main.vm @@ -0,0 +1,104 @@ +function Main.main 0 +push constant 0 +push constant 220 +push constant 511 +push constant 220 +call Screen.drawLine 4 +pop temp 0 +push constant 280 +push constant 90 +push constant 410 +push constant 220 +call Screen.drawRectangle 4 +pop temp 0 +push constant 0 +call Screen.setColor 1 +pop temp 0 +push constant 350 +push constant 120 +push constant 390 +push constant 219 +call Screen.drawRectangle 4 +pop temp 0 +push constant 292 +push constant 120 +push constant 332 +push constant 150 +call Screen.drawRectangle 4 +pop temp 0 +push constant 0 +not +call Screen.setColor 1 +pop temp 0 +push constant 360 +push constant 170 +push constant 3 +call Screen.drawCircle 3 +pop temp 0 +push constant 280 +push constant 90 +push constant 345 +push constant 35 +call Screen.drawLine 4 +pop temp 0 +push constant 345 +push constant 35 +push constant 410 +push constant 90 +call Screen.drawLine 4 +pop temp 0 +push constant 140 +push constant 60 +push constant 30 +call Screen.drawCircle 3 +pop temp 0 +push constant 140 +push constant 26 +push constant 140 +push constant 6 +call Screen.drawLine 4 +pop temp 0 +push constant 163 +push constant 35 +push constant 178 +push constant 20 +call Screen.drawLine 4 +pop temp 0 +push constant 174 +push constant 60 +push constant 194 +push constant 60 +call Screen.drawLine 4 +pop temp 0 +push constant 163 +push constant 85 +push constant 178 +push constant 100 +call Screen.drawLine 4 +pop temp 0 +push constant 140 +push constant 94 +push constant 140 +push constant 114 +call Screen.drawLine 4 +pop temp 0 +push constant 117 +push constant 85 +push constant 102 +push constant 100 +call Screen.drawLine 4 +pop temp 0 +push constant 106 +push constant 60 +push constant 86 +push constant 60 +call Screen.drawLine 4 +pop temp 0 +push constant 117 +push constant 35 +push constant 102 +push constant 20 +call Screen.drawLine 4 +pop temp 0 +push constant 0 +return diff --git a/projects/12/ScreenTest/Math.jack b/projects/12/ScreenTest/Math.jack new file mode 100644 index 0000000..01bce8f --- /dev/null +++ b/projects/12/ScreenTest/Math.jack @@ -0,0 +1,158 @@ +// 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/Math.jack
+
+/**
+ * A library of commonly used mathematical functions.
+ * Note: Jack compilers implement multiplication and division using OS method calls.
+ */
+class Math {
+ static Array twoToThe;
+
+ /** Initializes the library. */
+ 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;
+ }
+ return;
+ }
+
+ function boolean bit(int x, int i) {
+ return ~(x & twoToThe[i] = 0);
+ }
+
+ function int sign(int x) {
+ if (x > 0) {
+ return 1;
+ } else {
+ if (x < 0) {
+ return -1;
+ } else {
+ return 0;
+ }
+ }
+ }
+
+ /** Returns the absolute value of x. */
+ function int abs(int x) {
+ if (x > 0){
+ return x;
+ } else {
+ return -x;
+ }
+ }
+
+ /** Returns the product of x and y.
+ * When a Jack compiler detects the multiplication operator '*' in the
+ * program's code, it handles it by invoking this method. In other words,
+ * the Jack expressions x*y and multiply(x,y) return the same value.
+ */
+ function int multiply(int x, int y) {
+ var int res, shiftedX, i;
+ let shiftedX = x;
+ let i = 0;
+ let res = 0;
+ //while ((~(twoToThe[i] > y)) & (i < 16)) {
+ while (i < 16) {
+ if (Math.bit(y, i)){
+ let res = res + shiftedX;
+ }
+ let shiftedX = shiftedX + shiftedX;
+ let i = i + 1;
+ }
+ return res;
+ }
+
+ /** Returns the integer part of x/y.
+ * When a Jack compiler detects the multiplication operator '/' in the
+ * program's code, it handles it by invoking this method. In other words,
+ * the Jack expressions x/y and divide(x,y) return the same value.
+ */
+ function int divide(int x, int y) {
+ var int ax, ay;
+ if (x > 0) {
+ if (y > 0) {
+ return Math.divide1(x, y);
+ } else {
+ return -Math.divide1(x, -y);
+ }
+ } else {
+ if (y > 0) {
+ return -Math.divide1(-x, y);
+ } else {
+ return Math.divide1(-x, -y);
+ }
+ }
+ }
+
+ function int divide1(int x, int y) {
+ var int q;
+ if (y = 0) {
+ do Output.printString("Error: division by zero.");
+ do Sys.error(0);
+ }
+ if ((y > x) | (y < 0)) {
+ return 0;
+ }
+ let q = Math.divide1(x, y * 2);
+ if (x - (2 * q * y) < y) {
+ return 2 * q;
+ } else {
+ return 2 * q + 1;
+ }
+ }
+
+ function int length(int x){
+ var int n;
+ let n = 14;
+ while (twoToThe[n] > x){
+ let n = n - 1;
+ }
+ return n;
+ }
+
+ /** Returns the integer part of the square root of x. */
+ function int sqrt(int x) {
+ var int y, k, z, w;
+ if (x < 0) {
+ do Output.printString("Error: square rooting a negative number.");
+ do Sys.error(0);
+ }
+ let k = Math.length(x) / 2;
+ let y = 0;
+ while (~(k < 0)) {
+ let z = y + twoToThe[k];
+ let w = z * z;
+ if ((~(w > x)) & (w > 0)) {
+ let y = z;
+ }
+ let k = k - 1;
+ }
+ return y;
+ }
+
+ /** Returns the greater number. */
+ function int max(int a, int b) {
+ if (a > b) {
+ return a;
+ } else {
+ return b;
+ }
+ }
+
+ /** Returns the smaller number. */
+ function int min(int a, int b) {
+ if (a < b) {
+ return a;
+ } else {
+ return b;
+ }
+ }
+}
diff --git a/projects/12/ScreenTest/Math.vm b/projects/12/ScreenTest/Math.vm new file mode 100644 index 0000000..513fc1a --- /dev/null +++ b/projects/12/ScreenTest/Math.vm @@ -0,0 +1,472 @@ +function Math.init 2 +push constant 1 +pop local 1 +push constant 0 +pop local 0 +push constant 16 +call Array.new 1 +pop static 0 +label WHILE_EXP0 +push local 0 +push constant 16 +lt +not +if-goto WHILE_END0 +push local 0 +push static 0 +add +push local 1 +pop temp 0 +pop pointer 1 +push temp 0 +pop that 0 +push local 1 +push local 1 +add +pop local 1 +push local 0 +push constant 1 +add +pop local 0 +goto WHILE_EXP0 +label WHILE_END0 +push constant 0 +return +function Math.bit 0 +push argument 0 +push argument 1 +push static 0 +add +pop pointer 1 +push that 0 +and +push constant 0 +eq +not +return +function Math.sign 0 +push argument 0 +push constant 0 +gt +if-goto IF_TRUE0 +goto IF_FALSE0 +label IF_TRUE0 +push constant 1 +return +goto IF_END0 +label IF_FALSE0 +push argument 0 +push constant 0 +lt +if-goto IF_TRUE1 +goto IF_FALSE1 +label IF_TRUE1 +push constant 1 +neg +return +goto IF_END1 +label IF_FALSE1 +push constant 0 +return +label IF_END1 +label IF_END0 +function Math.abs 0 +push argument 0 +push constant 0 +gt +if-goto IF_TRUE0 +goto IF_FALSE0 +label IF_TRUE0 +push argument 0 +return +goto IF_END0 +label IF_FALSE0 +push argument 0 +neg +return +label IF_END0 +function Math.multiply 3 +push argument 0 +pop local 1 +push constant 0 +pop local 2 +push constant 0 +pop local 0 +label WHILE_EXP0 +push local 2 +push constant 16 +lt +not +if-goto WHILE_END0 +push argument 1 +push local 2 +call Math.bit 2 +if-goto IF_TRUE0 +goto IF_FALSE0 +label IF_TRUE0 +push local 0 +push local 1 +add +pop local 0 +label IF_FALSE0 +push local 1 +push local 1 +add +pop local 1 +push local 2 +push constant 1 +add +pop local 2 +goto WHILE_EXP0 +label WHILE_END0 +push local 0 +return +function Math.divide 2 +push argument 0 +push constant 0 +gt +if-goto IF_TRUE0 +goto IF_FALSE0 +label IF_TRUE0 +push argument 1 +push constant 0 +gt +if-goto IF_TRUE1 +goto IF_FALSE1 +label IF_TRUE1 +push argument 0 +push argument 1 +call Math.divide1 2 +return +goto IF_END1 +label IF_FALSE1 +push argument 0 +push argument 1 +neg +call Math.divide1 2 +neg +return +label IF_END1 +goto IF_END0 +label IF_FALSE0 +push argument 1 +push constant 0 +gt +if-goto IF_TRUE2 +goto IF_FALSE2 +label IF_TRUE2 +push argument 0 +neg +push argument 1 +call Math.divide1 2 +neg +return +goto IF_END2 +label IF_FALSE2 +push argument 0 +neg +push argument 1 +neg +call Math.divide1 2 +return +label IF_END2 +label IF_END0 +function Math.divide1 1 +push argument 1 +push constant 0 +eq +if-goto IF_TRUE0 +goto IF_FALSE0 +label IF_TRUE0 +push constant 24 +call String.new 1 +push constant 69 +call String.appendChar 2 +push constant 114 +call String.appendChar 2 +push constant 114 +call String.appendChar 2 +push constant 111 +call String.appendChar 2 +push constant 114 +call String.appendChar 2 +push constant 58 +call String.appendChar 2 +push constant 32 +call String.appendChar 2 +push constant 100 +call String.appendChar 2 +push constant 105 +call String.appendChar 2 +push constant 118 +call String.appendChar 2 +push constant 105 +call String.appendChar 2 +push constant 115 +call String.appendChar 2 +push constant 105 +call String.appendChar 2 +push constant 111 +call String.appendChar 2 +push constant 110 +call String.appendChar 2 +push constant 32 +call String.appendChar 2 +push constant 98 +call String.appendChar 2 +push constant 121 +call String.appendChar 2 +push constant 32 +call String.appendChar 2 +push constant 122 +call String.appendChar 2 +push constant 101 +call String.appendChar 2 +push constant 114 +call String.appendChar 2 +push constant 111 +call String.appendChar 2 +push constant 46 +call String.appendChar 2 +call Output.printString 1 +pop temp 0 +push constant 0 +call Sys.error 1 +pop temp 0 +label IF_FALSE0 +push argument 1 +push argument 0 +gt +push argument 1 +push constant 0 +lt +or +if-goto IF_TRUE1 +goto IF_FALSE1 +label IF_TRUE1 +push constant 0 +return +label IF_FALSE1 +push argument 0 +push argument 1 +push constant 2 +call Math.multiply 2 +call Math.divide1 2 +pop local 0 +push argument 0 +push constant 2 +push local 0 +call Math.multiply 2 +push argument 1 +call Math.multiply 2 +sub +push argument 1 +lt +if-goto IF_TRUE2 +goto IF_FALSE2 +label IF_TRUE2 +push constant 2 +push local 0 +call Math.multiply 2 +return +goto IF_END2 +label IF_FALSE2 +push constant 2 +push local 0 +call Math.multiply 2 +push constant 1 +add +return +label IF_END2 +function Math.length 1 +push constant 14 +pop local 0 +label WHILE_EXP0 +push local 0 +push static 0 +add +pop pointer 1 +push that 0 +push argument 0 +gt +not +if-goto WHILE_END0 +push local 0 +push constant 1 +sub +pop local 0 +goto WHILE_EXP0 +label WHILE_END0 +push local 0 +return +function Math.sqrt 4 +push argument 0 +push constant 0 +lt +if-goto IF_TRUE0 +goto IF_FALSE0 +label IF_TRUE0 +push constant 40 +call String.new 1 +push constant 69 +call String.appendChar 2 +push constant 114 +call String.appendChar 2 +push constant 114 +call String.appendChar 2 +push constant 111 +call String.appendChar 2 +push constant 114 +call String.appendChar 2 +push constant 58 +call String.appendChar 2 +push constant 32 +call String.appendChar 2 +push constant 115 +call String.appendChar 2 +push constant 113 +call String.appendChar 2 +push constant 117 +call String.appendChar 2 +push constant 97 +call String.appendChar 2 +push constant 114 +call String.appendChar 2 +push constant 101 +call String.appendChar 2 +push constant 32 +call String.appendChar 2 +push constant 114 +call String.appendChar 2 +push constant 111 +call String.appendChar 2 +push constant 111 +call String.appendChar 2 +push constant 116 +call String.appendChar 2 +push constant 105 +call String.appendChar 2 +push constant 110 +call String.appendChar 2 +push constant 103 +call String.appendChar 2 +push constant 32 +call String.appendChar 2 +push constant 97 +call String.appendChar 2 +push constant 32 +call String.appendChar 2 +push constant 110 +call String.appendChar 2 +push constant 101 +call String.appendChar 2 +push constant 103 +call String.appendChar 2 +push constant 97 +call String.appendChar 2 +push constant 116 +call String.appendChar 2 +push constant 105 +call String.appendChar 2 +push constant 118 +call String.appendChar 2 +push constant 101 +call String.appendChar 2 +push constant 32 +call String.appendChar 2 +push constant 110 +call String.appendChar 2 +push constant 117 +call String.appendChar 2 +push constant 109 +call String.appendChar 2 +push constant 98 +call String.appendChar 2 +push constant 101 +call String.appendChar 2 +push constant 114 +call String.appendChar 2 +push constant 46 +call String.appendChar 2 +call Output.printString 1 +pop temp 0 +push constant 0 +call Sys.error 1 +pop temp 0 +label IF_FALSE0 +push argument 0 +call Math.length 1 +push constant 2 +call Math.divide 2 +pop local 1 +push constant 0 +pop local 0 +label WHILE_EXP0 +push local 1 +push constant 0 +lt +not +not +if-goto WHILE_END0 +push local 0 +push local 1 +push static 0 +add +pop pointer 1 +push that 0 +add +pop local 2 +push local 2 +push local 2 +call Math.multiply 2 +pop local 3 +push local 3 +push argument 0 +gt +not +push local 3 +push constant 0 +gt +and +if-goto IF_TRUE1 +goto IF_FALSE1 +label IF_TRUE1 +push local 2 +pop local 0 +label IF_FALSE1 +push local 1 +push constant 1 +sub +pop local 1 +goto WHILE_EXP0 +label WHILE_END0 +push local 0 +return +function Math.max 0 +push argument 0 +push argument 1 +gt +if-goto IF_TRUE0 +goto IF_FALSE0 +label IF_TRUE0 +push argument 0 +return +goto IF_END0 +label IF_FALSE0 +push argument 1 +return +label IF_END0 +function Math.min 0 +push argument 0 +push argument 1 +lt +if-goto IF_TRUE0 +goto IF_FALSE0 +label IF_TRUE0 +push argument 0 +return +goto IF_END0 +label IF_FALSE0 +push argument 1 +return +label IF_END0 diff --git a/projects/12/ScreenTest/Screen.jack b/projects/12/ScreenTest/Screen.jack new file mode 100644 index 0000000..a370ab9 --- /dev/null +++ b/projects/12/ScreenTest/Screen.jack @@ -0,0 +1,138 @@ +// 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;
+ }
+}
diff --git a/projects/12/ScreenTest/Screen.vm b/projects/12/ScreenTest/Screen.vm new file mode 100644 index 0000000..8468225 --- /dev/null +++ b/projects/12/ScreenTest/Screen.vm @@ -0,0 +1,407 @@ +function Screen.init 2 +push constant 1 +pop local 1 +push constant 0 +pop local 0 +push constant 16 +call Array.new 1 +pop static 0 +label WHILE_EXP0 +push local 0 +push constant 16 +lt +not +if-goto WHILE_END0 +push local 0 +push static 0 +add +push local 1 +pop temp 0 +pop pointer 1 +push temp 0 +pop that 0 +push local 1 +push local 1 +add +pop local 1 +push local 0 +push constant 1 +add +pop local 0 +goto WHILE_EXP0 +label WHILE_END0 +push constant 16384 +pop static 1 +push constant 0 +not +pop static 2 +push constant 0 +return +function Screen.clearScreen 1 +push static 2 +pop local 0 +push constant 0 +pop static 2 +push constant 0 +push constant 0 +push constant 511 +push constant 255 +call Screen.drawRectangle 4 +pop temp 0 +push local 0 +pop static 2 +push constant 0 +return +function Screen.setColor 0 +push argument 0 +pop static 2 +push constant 0 +return +function Screen.drawPixel 2 +push argument 0 +push constant 0 +lt +push argument 1 +push constant 0 +lt +or +push argument 0 +push constant 511 +gt +or +push argument 1 +push constant 255 +gt +or +if-goto IF_TRUE0 +goto IF_FALSE0 +label IF_TRUE0 +push constant 0 +return +label IF_FALSE0 +push argument 0 +push constant 16 +call Math.divide 2 +pop local 1 +push constant 32 +push argument 1 +call Math.multiply 2 +push local 1 +add +pop local 0 +push static 2 +if-goto IF_TRUE1 +goto IF_FALSE1 +label IF_TRUE1 +push local 0 +push static 1 +add +push local 0 +push static 1 +add +pop pointer 1 +push that 0 +push argument 0 +push local 1 +push constant 16 +call Math.multiply 2 +sub +push static 0 +add +pop pointer 1 +push that 0 +or +pop temp 0 +pop pointer 1 +push temp 0 +pop that 0 +goto IF_END1 +label IF_FALSE1 +push local 0 +push static 1 +add +push local 0 +push static 1 +add +pop pointer 1 +push that 0 +push argument 0 +push local 1 +push constant 16 +call Math.multiply 2 +sub +push static 0 +add +pop pointer 1 +push that 0 +push constant 1 +add +neg +and +pop temp 0 +pop pointer 1 +push temp 0 +pop that 0 +label IF_END1 +push constant 0 +return +function Screen.drawLine 7 +push argument 0 +pop local 2 +push argument 1 +pop local 3 +push local 2 +push local 3 +call Screen.drawPixel 2 +pop temp 0 +push argument 0 +push argument 2 +eq +if-goto IF_TRUE0 +goto IF_FALSE0 +label IF_TRUE0 +push argument 1 +push argument 3 +eq +if-goto IF_TRUE1 +goto IF_FALSE1 +label IF_TRUE1 +push constant 0 +return +goto IF_END1 +label IF_FALSE1 +push constant 1 +pop local 6 +label IF_END1 +goto IF_END0 +label IF_FALSE0 +push argument 1 +push argument 3 +eq +if-goto IF_TRUE2 +goto IF_FALSE2 +label IF_TRUE2 +push constant 1 +neg +pop local 6 +goto IF_END2 +label IF_FALSE2 +push constant 0 +pop local 6 +label IF_END2 +label IF_END0 +push argument 2 +push argument 0 +sub +pop local 0 +push argument 3 +push argument 1 +sub +pop local 1 +push local 0 +call Math.sign 1 +pop local 4 +push local 1 +call Math.sign 1 +pop local 5 +push local 0 +call Math.abs 1 +pop local 0 +push local 1 +call Math.abs 1 +pop local 1 +label WHILE_EXP0 +push local 2 +push argument 2 +eq +push local 3 +push argument 3 +eq +and +not +not +if-goto WHILE_END0 +push local 6 +push constant 0 +lt +if-goto IF_TRUE3 +goto IF_FALSE3 +label IF_TRUE3 +push local 2 +push local 4 +add +pop local 2 +push local 6 +push local 1 +add +pop local 6 +goto IF_END3 +label IF_FALSE3 +push local 3 +push local 5 +add +pop local 3 +push local 6 +push local 0 +sub +pop local 6 +label IF_END3 +push local 2 +push local 3 +call Screen.drawPixel 2 +pop temp 0 +goto WHILE_EXP0 +label WHILE_END0 +push constant 0 +return +function Screen.drawRectangle 1 +push argument 0 +push argument 2 +gt +push argument 1 +push argument 3 +gt +or +if-goto IF_TRUE0 +goto IF_FALSE0 +label IF_TRUE0 +push constant 0 +return +label IF_FALSE0 +push argument 0 +pop local 0 +label WHILE_EXP0 +push local 0 +push argument 2 +gt +not +not +if-goto WHILE_END0 +push local 0 +push argument 1 +push local 0 +push argument 3 +call Screen.drawLine 4 +pop temp 0 +push local 0 +push constant 1 +add +pop local 0 +goto WHILE_EXP0 +label WHILE_END0 +push constant 0 +return +function Screen.drawCircle 3 +push argument 2 +push constant 181 +gt +if-goto IF_TRUE0 +goto IF_FALSE0 +label IF_TRUE0 +push constant 27 +call String.new 1 +push constant 100 +call String.appendChar 2 +push constant 114 +call String.appendChar 2 +push constant 97 +call String.appendChar 2 +push constant 119 +call String.appendChar 2 +push constant 67 +call String.appendChar 2 +push constant 105 +call String.appendChar 2 +push constant 114 +call String.appendChar 2 +push constant 99 +call String.appendChar 2 +push constant 108 +call String.appendChar 2 +push constant 101 +call String.appendChar 2 +push constant 58 +call String.appendChar 2 +push constant 32 +call String.appendChar 2 +push constant 114 +call String.appendChar 2 +push constant 97 +call String.appendChar 2 +push constant 100 +call String.appendChar 2 +push constant 105 +call String.appendChar 2 +push constant 117 +call String.appendChar 2 +push constant 115 +call String.appendChar 2 +push constant 32 +call String.appendChar 2 +push constant 116 +call String.appendChar 2 +push constant 111 +call String.appendChar 2 +push constant 111 +call String.appendChar 2 +push constant 32 +call String.appendChar 2 +push constant 98 +call String.appendChar 2 +push constant 105 +call String.appendChar 2 +push constant 103 +call String.appendChar 2 +push constant 33 +call String.appendChar 2 +call String.println 1 +pop temp 0 +push constant 2 +call Sys.error 1 +pop temp 0 +push constant 0 +return +label IF_FALSE0 +push argument 2 +neg +pop local 1 +push argument 2 +push argument 2 +call Math.multiply 2 +pop local 2 +label WHILE_EXP0 +push local 1 +push argument 2 +gt +not +not +if-goto WHILE_END0 +push local 2 +push local 1 +push local 1 +call Math.multiply 2 +sub +call Math.sqrt 1 +pop local 0 +push argument 0 +push local 0 +sub +push argument 1 +push local 1 +add +push argument 0 +push local 0 +add +push argument 1 +push local 1 +add +call Screen.drawLine 4 +pop temp 0 +push local 1 +push constant 1 +add +pop local 1 +goto WHILE_EXP0 +label WHILE_END0 +push constant 0 +return |