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microbit-20191228_Chad_v2.js

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+/* Program Log * /
+    C.Greenwood
+    2019-09-28, 2019-12-28
+    Create a silly meteor dodging game.
+/* End Program Log */
+
+const boardSizeX = 5;
+const boardSizeY = 5;
+
+/* Enemy Actions */
+function has_collided(x: number, y: number, otherX: number, otherY: number) {
+    if (x == otherX && y == otherY) {
+        return true;
+    }
+    return false;
+}
+function redraw_enemy(x: number, y: number) {
+    led.unplot(x, y - 1);
+    led.plot(x, y);
+}
+
+let round = 1;
+basic.forever(function () {
+    // Draw player
+    player_x = ((boardSizeX - 1) / 2); // center on X axis. Do not allow this to have a decimal value
+    player_y = boardSizeY - 1; // last row
+    led.plot(player_x, player_y);
+
+    // Difficulty config
+    let time = 600; // 500 is somewhat slow but good for learning
+    let win_time = 200; // 100 gets pretty fast at the end. 250 makes it easier to finish.
+    let advance_time = 10; // 10 is somewhat balanced, 5 is a bit slower
+    let enemies = [];
+    while (time > win_time) {
+        for (let i = 0; i < enemies.length; i++) { // change this x loop to be the Enemy array loop
+            enemies[i].y += 1;
+            redraw_enemy(enemies[i].x, enemies[i].y);
+            // Player has been hit
+            if (has_collided(enemies[i].x, enemies[i].y, player_x, player_y) === true) {
+                print_frown();
+                round = 1;
+                return;
+            }
+            // Remove the meteor if it is in the line of movement
+            if (enemies[i].y > player_y) {
+                enemies.splice(i, 1);
+            }
+        }
+        basic.pause(time);
+        time = time - advance_time;
+        if (enemies.length < round) {
+            let enemy = {
+                x: Math.randomRange(0, boardSizeX - 1),
+                y: Math.randomRange((boardSizeY * -1) - 1, 0)
+            };
+            enemies.push(enemy);
+            redraw_enemy(enemy.x, enemy.y);
+        }
+        led.plot(player_x, player_y);
+    }
+    print_smile();
+    round = round + 1;
+})
+/* End Enemy Actions */
+
+/* User Controls */
+let player_x = ((boardSizeX - 1) / 2); // center on X axis. Do not allow this to have a decimal value
+let player_y = boardSizeY - 1; // last row
+input.onButtonPressed(Button.A, function () {
+    led.unplot(player_x, player_y);
+    if (player_x > 0) {
+        player_x = player_x - 1;
+    }
+    led.plot(player_x, player_y);
+})
+input.onButtonPressed(Button.B, function () {
+    led.unplot(player_x, player_y);
+    if (player_x < (boardSizeX - 1)) {
+        player_x = player_x + 1;
+    }
+    led.plot(player_x, player_y);
+})
+/* End User Controls */
+
+/* Supporting Functions */
+function print_frown() {
+    clear_board();
+    // eyes
+    led.plot(1, 1);
+    led.plot(3, 1);
+    // mouth
+    led.plot(0, 4);
+    led.plot(1, 3);
+    led.plot(2, 3);
+    led.plot(3, 3);
+    led.plot(4, 4);
+    basic.pause(10000); // 10 seconds
+    clear_board();
+}
+
+function print_smile() {
+    clear_board();
+    // eyes
+    led.plot(1, 1);
+    led.plot(3, 1);
+    // mouth
+    led.plot(0, 3);
+    led.plot(1, 4);
+    led.plot(2, 4);
+    led.plot(3, 4);
+    led.plot(4, 3);
+    basic.pause(2000); // 2 seconds
+    clear_board();
+}
+
+function clear_board() {
+    // unplot everything
+    for (let i = 0; i < boardSizeX; i++) {
+        for (let j = 0; j < boardSizeY; j++) {
+            led.unplot(i, j);
+        }
+    }
+}
+/* End Supporting Functions */