方块。

8By8/8By8.ino

@@ -24,14 +24,16 @@ public:
     brightness_count = (brightness_count + 1) % 3;
 
     for (int i = 0; i < 8; i++) {
-        for (int j = 0; j < 8; j++) {
-            // In LED_status:
-            // 0 = off
-            // 4 = brightest
-            digitalWrite(BUS_START_PIN + j, ((LED_status[layer_count][i] >> (j * 2)) & 3) >= (3 - brightness_count));
-        }
-        digitalWrite(CLOCK_START_PIN + i, HIGH);
-        digitalWrite(CLOCK_START_PIN + i, LOW);
+      for (int j = 0; j < 8; j++) {
+        // In LED_status:
+        // 0 = off
+        // 4 = brightest
+        digitalWrite(BUS_START_PIN + j,
+                     ((LED_status[layer_count][i] >> (j * 2)) & 3) >=
+                         (3 - brightness_count));
+      }
+      digitalWrite(CLOCK_START_PIN + i, HIGH);
+      digitalWrite(CLOCK_START_PIN + i, LOW);
     }
 
     digitalWrite(SW_START_PIN + layer_count, HIGH);
@@ -39,10 +41,54 @@ public:
 
   static void set_status(int x, int y, int z, int brightness) {
     if (x >= 8 || x < 0 || y >= 8 || y < 0 || z >= 8 || z < 0) {
-        return;
+      return;
     }
     brightness %= 4;
-    LED_status[z][x] = (LED_status[z][x] & (~(3 << (y * 2)))) | (brightness << (y * 2));
+    LED_status[z][x] =
+        (LED_status[z][x] & (~(3 << (y * 2)))) | (brightness << (y * 2));
+  }
+
+  static int get_status(int x, int y, int z) {
+    return LED_status[z][x] >> (y * 2) & 3;
+  }
+
+  static void clear() {
+    for (int i = 0; i < 8; i++) {
+      for (int j = 0; j < 8; j++) {
+        LED_status[i][j] = 0;
+      }
+    }
+  }
+
+  static void draw_line(int x, int y, int z, int length, int direction,
+                        int brightness) {
+    if (x >= 8 || x < 0 || y >= 8 || y < 0 || z >= 8 || z < 0) {
+      return;
+    }
+    if (direction >= 3 || direction < 0 || length <= 0 || brightness >= 4 ||
+        brightness < 0) {
+      return;
+    }
+    // 0: x
+    // 1: y
+    // 2: z
+    switch (direction) {
+    case 0:
+      for (int i = 0; i < length; i++) {
+        set_status(x + i, y, z, brightness);
+      }
+      break;
+    case 1:
+      for (int i = 0; i < length; i++) {
+        set_status(x, y + i, z, brightness);
+      }
+      break;
+    case 2:
+      for (int i = 0; i < length; i++) {
+        set_status(x, y, z + i, brightness);
+      }
+      break;
+    }
   }
 };
 
@@ -52,27 +98,43 @@ int Cube::LED_status[8][8] = {0};
 int bright = 3;
 
 void setup() {
-    for (int i = 22; i < 46; i++) {
-        pinMode(i, OUTPUT);
-    }
+  for (int i = 22; i < 46; i++) {
+    pinMode(i, OUTPUT);
+  }
 
-    Timer1.initialize();
-    Timer1.setPeriod(TIME_PER_LAYER_IN_US);
-    Timer1.attachInterrupt(Cube::display);
-
-    Serial.begin(115200);
+  Timer1.initialize();
+  Timer1.setPeriod(TIME_PER_LAYER_IN_US);
+  Timer1.attachInterrupt(Cube::display);
 
+  Serial.begin(115200);
 }
 
+int step = 1;
+int i = 0;
+
 void loop() {
-    
-    for (int i = 7; i >= 0; i--) {
-        for (int j = 0; j < 8; j++) {
-            for (int k = 0; k < 8; k++) {
-                Cube::set_status(i, j, k, bright);
-                delay(5);
-            }
-        }
-    }
-    bright = (bright + 1) % 4;
+  Cube::clear();
+  Cube::draw_line(3 - i, 3 - i, 3 - i, 2 * i + 2, 0, 3);
+  Cube::draw_line(3 - i, 4 + i, 3 - i, 2 * i + 2, 0, 3);
+  Cube::draw_line(3 - i, 3 - i, 4 + i, 2 * i + 2, 0, 3);
+  Cube::draw_line(3 - i, 4 + i, 4 + i, 2 * i + 2, 0, 3);
+
+  Cube::draw_line(3 - i, 3 - i, 3 - i, 2 * i + 2, 1, 3);
+  Cube::draw_line(4 + i, 3 - i, 3 - i, 2 * i + 2, 1, 3);
+  Cube::draw_line(3 - i, 3 - i, 4 + i, 2 * i + 2, 1, 3);
+  Cube::draw_line(4 + i, 3 - i, 4 + i, 2 * i + 2, 1, 3);
+
+  Cube::draw_line(3 - i, 3 - i, 3 - i, 2 * i + 2, 2, 3);
+  Cube::draw_line(3 - i, 4 + i, 3 - i, 2 * i + 2, 2, 3);
+  Cube::draw_line(4 + i, 3 - i, 3 - i, 2 * i + 2, 2, 3);
+  Cube::draw_line(4 + i, 4 + i, 3 - i, 2 * i + 2, 2, 3);
+
+  delay(50);
+  i += step;
+  if (i >= 3) {
+    step = -1;
+  }
+  else if (i <= 0) {
+    step = 1;
+  }
 }