OK LETS GIT HOLY SHIT

cnibbles.c

@@ -0,0 +1,178 @@
+#include <stdio.h>
+#include <stdbool.h>
+#include "helpers.c"
+
+#define WIDTH 60
+#define HEIGHT 40
+#define DEBUG false
+
+unsigned int startLength = 0;
+unsigned int startApples = 0;
+
+unsigned int currentTick;
+int snake[WIDTH*HEIGHT];
+unsigned int snakeLength;
+unsigned int snakeX;
+unsigned int snakeY;
+int snakeDirX;
+int snakeDirY;
+unsigned int numApples;
+
+void spawnApple();
+void tick();
+void draw();
+
+void start_game(int len, int n_apples)
+{
+	if (startLength == 0)
+		startLength = len;
+	if (startApples == 0)
+		startApples = n_apples;
+
+	// Initialize variables
+	currentTick = 0;
+	snakeLength = len;
+	numApples = n_apples;
+
+	nib_init();
+
+	//printf("Started with worm length %i and %i apples!\n", snakeLength, numApples);
+
+	// Initialize the snake array
+	// Set every cell to a time value greater than the snake length
+	for (unsigned int i = 0; i < WIDTH*HEIGHT; ++i) {
+		snake[i] = snakeLength;
+	}
+
+	// Place the snake head in the middle
+	snakeX = WIDTH / 2;
+	snakeY = HEIGHT / 2;
+	snakeDirX = 0;
+	snakeDirY = -1;
+
+	// Place the initial snake segments, downwards or something
+	for (unsigned int i = 0; i < snakeLength; ++i) {
+		unsigned int x = snakeX % WIDTH;
+		unsigned int y = (snakeY + i) % HEIGHT;
+		snake[x + y*WIDTH] = i;
+	}
+
+	// Place apples
+	srand(time(0));
+	for (unsigned int i = 0; i < numApples; ++i) {
+		spawnApple();
+	}
+	
+	while (true) {
+		tick();
+		draw();
+	}
+}
+
+void spawnApple()
+{
+	unsigned int x = rand() % WIDTH;
+	unsigned int y = rand() % HEIGHT;
+	while (snake[x + y*WIDTH] < snakeLength) {
+		x = rand() % WIDTH;
+		y = rand() % HEIGHT;
+	}
+	//printf("Placing apple at (%i,%i)\n", x, y);
+	snake[x + y*WIDTH] = -1;
+}
+
+void tick()
+{
+	currentTick++;
+	// Increment cell times
+	for (unsigned int i = 0; i < WIDTH*HEIGHT; ++i) {
+		int val = snake[i];
+		
+		if (val < 0) {
+			// Apple lifetime
+			//snake[i]--;
+		} else if (val >= 0 && val <= snakeLength) {
+			// Other cells
+			snake[i]++;
+		}
+	}
+
+	int key = nib_poll_kbd();
+	if (key == 'w' && snakeDirY != 1) {
+		snakeDirX = 0;
+		snakeDirY = -1;
+	}
+	if (key == 's' && snakeDirY != -1) {
+		snakeDirX = 0;
+		snakeDirY = 1;
+	}
+	if (key == 'a' && snakeDirX != 1) {
+		snakeDirX = -1;
+		snakeDirY = 0;
+	}
+	if (key == 'd' && snakeDirX != -1) {
+		snakeDirX = 1;
+		snakeDirY = 0;
+	}
+	
+	// Move snake
+	snakeX = (snakeX + snakeDirX + WIDTH) % WIDTH;
+	snakeY = (snakeY + snakeDirY + HEIGHT) % HEIGHT;
+	// On collision with self
+	int val = snake[snakeX + snakeY*WIDTH];
+	if (val < snakeLength && val >= 0) {
+		//nib_end();
+		start_game(startLength, startApples);
+	}
+	// ON collision with apple
+	if (val < 0) {
+		// Spawn a new apple somewhere
+		spawnApple();
+		// Increase our length!
+		snakeLength++;
+	}
+	snake[snakeX + snakeY*WIDTH] = 0;
+}
+
+void draw()
+{
+	char body[] = "NIBBLES";
+
+	for (int y = -1; y <= HEIGHT; ++y) {
+		for (int x = -1; x <= WIDTH; ++x) {
+			
+			if (x == -1 || y == -1 || x == WIDTH || y == HEIGHT) {
+				if (x == -1 || y == -1) {
+					unsigned int screenX = x + 1;
+					unsigned int screenY = y + 1;
+					nib_put_scr(screenX, screenY, '#');
+				} else {
+					unsigned int screenX = x + 1;
+					unsigned int screenY = y + 1;
+					nib_put_scr(screenX, screenY, '#');
+				}
+			} else {
+				int snakeVal = snake[x + y*WIDTH];
+				unsigned int screenX = x + 1;
+				unsigned int screenY = y + 1;
+
+				if (DEBUG) {
+					nib_put_scr(screenX, screenY, '0' + snakeVal);
+					continue;
+				}
+
+				if (snakeVal >= 0 && snakeVal < snakeLength) {
+					if (x == snakeX && y == snakeY) {
+						nib_put_scr(screenX, screenY, '@');
+					} else {
+						nib_put_scr(screenX, screenY, body[(snakeVal - 1) % 7]);
+					}
+				} else if (snakeVal < 0) {
+					nib_put_scr(screenX, screenY, 'o');
+				} else {
+					nib_put_scr(screenX, screenY, ' ');
+				}
+			}
+		}
+	}
+}