micro:bit
Snake
Dependencies: microbit
Fork of
microbit_snake
by 
Mohammad Khan
A Snake Game with animation, score and continuous play
Steps:
- Switch On.
- Snake animation plays.
- Game starts.
- Press buttons to move the snake left, right, up and down.
- Food appears as a dot on the display.
- Try eating the food by manoeuvring Snake to run over it.
- Snake grows as it eats food.
- As it grows it becomes hard to avoid snake biting itself.
- Game Over.
- Snake is flashed and then score is scrolled.
- Game restarts after replaying animation.
Controls:
- Left Button (A)
- If snake moving UP/DOWN moves snake to LEFT.
- If snake moving LEFT moves snake to DOWN.
- If snake moving RIGHT moves snake to UP.
- Right Button (B)
- If snake moving UP/DOWN moves snake to RIGHT.
- If snake moving LEFT moves snake to UP.
- If snake moving RIGHT moves snake to DOWN.
How it looks:
https://www.youtube.com/watch?v=unEs3NOvIKA
Binary to play with
/media/uploads/mazimkhan/microbit_snake_nrf51_microbit.hex
Diff: main.cpp
- Revision:
- 3:a0200bceae4b
- Parent:
- 2:38060465e019
- Child:
- 4:9fd9402eca3d
--- a/main.cpp Sun Apr 10 19:20:49 2016 +0000
+++ b/main.cpp Sun Apr 10 23:31:53 2016 +0000
@@ -22,8 +22,8 @@
#include "MicroBit.h"
#include "DigitalOut.h"
-#define SNAKE_HEAD_PIXEL_BRIGHTNESS 25
-#define SNAKE_REST_PIXEL_BRIGHTNESS 15
+#define SNAKE_HEAD_PIXEL_BRIGHTNESS 150
+#define SNAKE_BONE_PIXEL_BRIGHTNESS 15
#define SNAKE_FOOD_PIXEL_BRIGHTNESS 255
template <class T> class Node{
@@ -83,6 +83,9 @@
if (tail) {
tail = tail->getPrev();
node->detach();
+ if (tail == NULL){
+ head = NULL;
+ }
}
return node;
}
@@ -307,7 +310,7 @@
class Game {
public:
- Game(MicroBit & ubit): uBit(ubit), foodx(-1), foody(-1), image(5,5),
+ Game(MicroBit & ubit): uBit(ubit), foodx(-1), foody(-1), image(5,5), score(0),
buttonPressed(false) {
uBit.display.setDisplayMode(DISPLAY_MODE_GREYSCALE);
uBit.display.print(image);
@@ -328,11 +331,10 @@
}
bool move(){
- // Display food
- if (foodx != -1 && foody != -1){
- image.setPixelValue(foodx, foody, 255);
- uBit.display.print(image);
- }
+ // Dim old head
+ Dimension x = snake.getHeadX();
+ Dimension y = snake.getHeadY();
+ image.setPixelValue(x, y, SNAKE_BONE_PIXEL_BRIGHTNESS);
snake.grow();
@@ -350,6 +352,7 @@
// food gone
foodx = -1;
foody = -1;
+ score++;
// Since we have grown to the head. no need to delete tail.
} else {
@@ -363,7 +366,7 @@
}
// Turn On head.
- image.setPixelValue(nextX, nextY, 15);
+ image.setPixelValue(nextX, nextY, SNAKE_HEAD_PIXEL_BRIGHTNESS);
uBit.display.print(image);
buttonPressed = false;
return true;
@@ -406,6 +409,8 @@
if (isGoodFood(x, y)){
foodx = x;
foody = y;
+ image.setPixelValue(foodx, foody, 255);
+ uBit.display.print(image);
break;
}
}
@@ -413,6 +418,99 @@
uBit.sleep(500);
}
}
+
+ void animateSnake(){
+#define ANIMATION_SPEED 50
+ // UP 2
+ foodx = 2;foody = 1;
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+
+ foodx = 2;foody = 0;
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+
+ // LEFT
+ foodx = 1;foody = 0;
+ left();
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+
+ // DOWN
+ foodx = 1;foody = 1;
+ left();
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+
+ foodx = 1;foody = 2;
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+
+ for (int i = 0; i < 4; i++){
+ // LEFT
+ left();
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+
+ // UP
+ right();
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+
+ // LEFT
+ left();
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+
+ // DOWN
+ left();
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+ }
+
+ // Back to the centre
+ left();
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+
+ left();
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+ move();
+ uBit.sleep(ANIMATION_SPEED);
+
+ // eat the tail
+ while(snake.getHead()){
+ image.setPixelValue(snake.getTailX(), snake.getTailY(), 0);
+ uBit.display.print(image);
+ snake.reduce();
+ uBit.sleep(ANIMATION_SPEED);
+ }
+
+ reset();
+ }
+
void showGameOver(){
// switch off food
if (foodx != -1 && foody != -1){
@@ -424,7 +522,7 @@
// are not affected by display.setBrightness(). Possible Bug!!!
Node<SnakeBone> * bone = snake.getHead();
while (bone){
- image.setPixelValue(bone->d.getX(), bone->d.getY(), 255);
+ image.setPixelValue(bone->d.getX(), bone->d.getY(), SNAKE_FOOD_PIXEL_BRIGHTNESS);
bone = bone->getNext();
}
// Flash snake
@@ -434,9 +532,13 @@
if (toggle)
uBit.display.setBrightness(255);
else
- uBit.display.setBrightness(15);
+ uBit.display.setBrightness(SNAKE_BONE_PIXEL_BRIGHTNESS);
uBit.sleep(500);
}
+ uBit.display.print(MicroBitImage(5,5));
+ uBit.display.setBrightness(255);
+ uBit.display.scroll("SCORE-"); // don't mind spaces in a scrolling display.
+ uBit.display.scroll(score, 300);
}
void reset(){
@@ -445,8 +547,10 @@
foodx = -1;
foody = -1;
+ score = 0;
image = MicroBitImage(5, 5);
uBit.display.setDisplayMode(DISPLAY_MODE_GREYSCALE);
+ image.setPixelValue(snake.getHeadX(), snake.getHeadY(), SNAKE_HEAD_PIXEL_BRIGHTNESS);
uBit.display.print(image);
}
@@ -457,6 +561,7 @@
int foody;
Snake snake;
MicroBitImage image;
+ int score;
// Sync button press and movement. Don't let quick button presses
// change snake direction twice/thrice/... before moving. As a
@@ -477,6 +582,7 @@
game.right();
}
+
int main()
{
// Initialise the micro:bit runtime.
@@ -486,14 +592,9 @@
uBit.messageBus.listen(MICROBIT_ID_BUTTON_B, MICROBIT_BUTTON_EVT_CLICK, onButtonB);
// Continous play
- while (true)
- {
+ while (true){
+ game.animateSnake();
game.play();
-
- uBit.display.print(MicroBitImage(5,5));
- uBit.display.setBrightness(255);
- uBit.display.scroll("URBITTEN"); // don't mind spaces in a scrolling display.
-
game.reset();
}
}
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