void CDoubleLinkedList::addNodeBefore( CNode * pNode2, CNodeObject * pObject )
{
CNode * pNode1 = pNode2->getPrevNode();
if ( NULL == pNode1 ) {
// There is no nodes before this node
addNodeHead( pObject );
}
else {
// Add the node between the two
insertNode( pNode1, pNode2, pObject );
}
}
void startSnake(Snake* snake,SDL_Rect* display,SDL_Point* applet) {
snakeContext* context = (snakeContext*)malloc(sizeof(*context));
context->snake = snake;
context->display = display;
context->applet = applet;
snake->delay = 100;
snake->timer = SDL_AddTimer(snake->delay,(SDL_TimerCallback)&runSnake,context);
Mix_PlayMusic(snake->music,-1);
//Agrego nodos a la seriente hasta conseguir los buscados
for (int i = 0; i < snakeInitialLength-1; ++i)
addNodeHead(snake);
}
void moveSnake(Snake* snake,SDL_Rect* Display,SDL_Point* Applet) {
if(snake && Display && Applet) {
SDL_Point nextPos;
snakeNode* node = snake->tail;
if(!(snake->vecDirector.x || snake->vecDirector.y || snake->speed)) {
printf("Snake sin velocidad o direccion\n");
return;
}
//Calculo la nueva posicion de la cabeza de la serpiente
nextPos.x = node->pos.x+snake->vecDirector.x*snake->speed;
nextPos.y = node->pos.y+snake->vecDirector.y*snake->speed;
//Testeo la colision con las paredes del escenario
if(nextPos.x < 0 || nextPos.y < 0
|| nextPos.x > Display->w || nextPos.y > Display->h
|| snake->field.buff[(nextPos.x/snakeSize)+(nextPos.y/snakeSize)*snake->field.s.w]) {
SDL_Event e;
e.type = gameOverEventID;
SDL_PushEvent(&e);
} else {
moveHeadToTail(snake);
SDL_Point* pos = &snake->tail->pos;
//Muevo la posicion de el nodo que va a ser la cabea
snake->field.buff[(pos->x/snakeSize)+(pos->y/snakeSize)*snake->field.s.w]--;
*pos = nextPos;
snake->field.buff[(pos->x/snakeSize)+(pos->y/snakeSize)*snake->field.s.w]++;
//Testeo la colision con la manzana
if(Applet->x == nextPos.x && nextPos.y == Applet->y) {
//Si me como una manzana, crezco y tiro otra
for(int i = 0; i<4; i++)
addNodeHead(snake);
launchApplet(Applet,Display);
if(!(snake->nAppletMeals%5) && snake->delay >10)
snake->delay -= snake->delay/10;
//Aumento el contador de manzanas comidas
snake->nAppletMeals++;
printf("Manzanas comidas %u\n",snake->nAppletMeals);
}
}
}
}
void launchSnake(drawableSnake* drawable,SDL_Rect* display) {
if(drawable) {
MapField* field = &drawable->snake.field;
addNodeHead(&drawable->snake);
field->s.w = display->w/snakeSize+1;
field->s.h = display->h/snakeSize+1;
if(!field->buff)
field->buff = (byte*)malloc(sizeof(byte)*field->s.w*field->s.h);
memset(field->buff,false,sizeof(bool)*field->s.w*field->s.h);
SDL_Point* pos = &drawable->snake.head->pos;
//Pongo centrado a la serpiente
pos->x = display->w/2-snakeSize;
pos->y = display->h/2-snakeSize;
//Alineo la serpiente a multiplos del snakeSize
pos->x -= pos->x%snakeSize;
pos->y -= pos->y%snakeSize;
//Pongo la posicion de la serpiente
field->buff[(pos->x/snakeSize)+(pos->y/snakeSize)*field->s.w]++;
}
}
