void keyboard (unsigned char key, int x, int y) {
if(key == 'd')
{
yrot += 1;
if (yrot >360) yrot -= 360;
}
if(key == 'a')
{
yrot -= 1;
if (yrot < -360)yrot += 360;
}
if (key=='o') {
objcount = 0;
objgravity = objgrav_init;
addObject(20);
}
if(key=='f') {
createFood(1);
foodgravity = food_init;
linger = linger_init;
}
if(key=='p')
createPredator(1);
if(key=='m') {
createWalls1();
}
if(key=='n') {
createWalls2();
}
if(key=='-') {
objgravity -= 0.01;
}
}
void snake::createBody(int x,int y)
{
for(int i=0;i<=HEIGHT+1;i++)
for(int j=0;j<=WIDTH+1;j++)
{
if(i==0||j==0||i==HEIGHT+1||j==WIDTH+1) MAP[i][j]=WALL;
else MAP[i][j]=NOTHING;
}
for(int j=y;j>=1;j--) MAP[x][j]=y-j+1;
length=y;
head.x=x;head.y=y;
trail.x=x;trail.y=1;
while(createFood());
}
void snake::getFood()
{
cout<<"yes i get one!"<<endl;
score++;
MAP[snakeFood.x][snakeFood.y]=1;head.x=snakeFood.x;head.y=snakeFood.y;//fresh头点
length++;//增加长度
for(int i=1;i<=HEIGHT;i++)
for(int j=1;j<=WIDTH;j++)
{
if( MAP[i][j]>0 && !(i==snakeFood.x && j==snakeFood.y) )
{
MAP[i][j]+=1;//除了新的头点所有点编号加1
}
}
while(createFood());
}
void snake::resetFood()
{
clearFood();
while(createFood());
}
static pos createFood(int width, int height, posList snake) {
// The high level view of how this code works: (1) Creates a list of
// open positions (i.e positions not occuipied by the snake) and (2)
// grabs a random element from that list. But it does this without
// creating a list of open positions.
int maxRand = width*height - snake.len;
if (maxRand <= 0) {
return (pos){ .x = -1, .y = -1 };
}
int randIndex = rand() % maxRand;
int curRandIndex = 0;
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
pos p = { .x = x, .y = y };
if (posList_contains(snake, p)) {
continue;
}
if (curRandIndex == randIndex) {
return p;
}
curRandIndex++;
}
}
// This should never be reached but I added it to get rid of the
// compiler warning.
return (pos){ .x = -1, .y = -1 };
}
static const dir NO_DIRECTION = { .x = 0, .y = 0 };
static dir actionToDirection(playeraction a) {
if (a == UP) {
return (dir){ .x = 0, .y = -1 };
}
if (a == DOWN) {
return (dir){ .x = 0, .y = 1 };
}
if (a == LEFT) {
return (dir){ .x = -1, .y = 0 };
}
if (a == RIGHT) {
return (dir){ .x = 1, .y = 0 };
}
return NO_DIRECTION;
}
static void initState(int width, int height, posList *snake, pos *food, playeractionQueue *queue, dir *curDirection, bool *paused, int *score) {
srand(time(NULL));
snake->len = 4;
snake->list[0] = (pos){ .x = 0, .y = 1 };
snake->list[1] = (pos){ .x = 0, .y = 0 };
snake->list[2] = (pos){ .x = 1, .y = 0 };
snake->list[3] = (pos){ .x = 1, .y = 1 };
*food = createFood(width, height, *snake);
while (playeractionQueue_dequeue(queue) != NO_ACTION);
*curDirection = actionToDirection(DOWN);
*paused = false;
*score = 0;
}
static bool gameIsWon(int width, int height, posList snake) {
return width*height == snake.len;
}
static bool gameIsLost(int width, int height, posList snake) {
{
posList headless = snake;
headless.len--;
if (posList_contains(headless, snake.list[snake.len-1])) {
return true;
}
}
{
pos head = snake.list[snake.len-1];
if (head.x < 0 || width <= head.x) {
return true;
}
if (head.y < 0 || height <= head.y) {
return true;
}
}
return false;
}
static void updateGameState(playeraction action, int width, int height, bool *paused, posList *snake, pos *food, dir *d, int *score) {
if (action == PAUSE) {
*paused = !(*paused);
return;
}
if (*paused) {
return;
}
dir newDir = actionToDirection(action);
if (!dir_equal(newDir, NO_DIRECTION)) {
*d = newDir;
}
pos newHead = { .x = snake->list[snake->len-1].x + d->x, .y = snake->list[snake->len-1].y + d->y };
if (pos_equal(newHead, *food)) {
*snake = posList_append(*snake, newHead);
*food = createFood(width, height, *snake);
(*score)++;
} else {
for (int i = 0; i < snake->len-1; i++) {
snake->list[i] = snake->list[i+1];
}
snake->list[snake->len-1].x += d->x;
snake->list[snake->len-1].y += d->y;
}
}
char *playeraction_toString(playeraction p) {
switch (p) {
case NO_ACTION:
return "no action";
case UP:
return "move the snake up";
case DOWN:
return "move the snake down";
case LEFT:
return "move the snake left";
case RIGHT:
return "move the snake right";
case PAUSE:
return "pause the game";
case QUIT:
return "quit the game";
case NEW_GAME:
return "start a new game";
default:
return "BUG!!! Unknown player action, please add another case to the switch statement";
}
}
void playeractionQueue_enqueue(playeractionQueue *q, playeraction c) {
if (q->isFull) {
return;
}
pthread_mutex_lock(q->mu);
q->arr[q->tail] = c;
q->tail = (q->tail+1) % PLAYERACTIONQUEUE_SIZE;
if (q->tail == q->head) {
q->isFull = 1;
}
pthread_mutex_unlock(q->mu);
}
size_t snakeSpaceRequired(int width, int height) {
posList snake;
return width * height * sizeof(*snake.list);
}
void snake(int width, int height, struct timespec frameRate, void *snakeMem, playeractionQueue *actionsQueue, void (*render)(int width, int height, posList snake, pos food, bool paused, int score, bool gameIsWon, bool gameIsLost)) {
posList snake;
pos food;
dir curDirection;
bool paused;
int score;
snake.list = snakeMem;
initState(width, height, &snake, &food, actionsQueue, &curDirection, &paused, &score);
while (true) {
bool won = gameIsWon(width, height, snake);
bool lost = gameIsLost(width, height, snake);
render(width, height, snake, food, paused, score, won, lost);
nanosleep(&frameRate, NULL);
playeraction action = playeractionQueue_dequeue(actionsQueue);
while (!dir_orthogonal(curDirection, actionToDirection(action))) {
action = playeractionQueue_dequeue(actionsQueue);
}
if (action == QUIT) {
break;
}
if (action == NEW_GAME) {
initState(width, height, &snake, &food, actionsQueue, &curDirection, &paused, &score);
continue;
}
if (won || lost) {
continue;
}
updateGameState(action, width, height, &paused, &snake, &food, &curDirection, &score);
}
}
Food getFoodOnPos(FoodRepoDynamic* v, int pos){
if (pos < 0 || pos >= v->length)
return createFood("", -1,"",0,0,0);
return v->foodstuff[pos];
}
