Time for action – adding collision detection

Let's see how that translates to code:

1. Still in Terrain.cpp:

   void Terrain::checkCollision (Player * player) {
   
      if (player->getState() == kPlayerDying) return;
      bool inAir = true;
      for (auto block : _blocks) {
         if (block->getType() == kBlockGap) continue;
         
         //if within x, check y (bottom collision)
         if (player->right() >= this->getPositionX() + block->left() && player->left() <= this->getPositionX() + block->right()) {
               
           if (player->bottom() >= block->top() && player->next_bottom() <= block->top() && player->top() > block->top()) {
              player->setNextPosition(Vec2(player->getNextPosition().x, block->top() + player->getHeight()));
              player->setVector ( Vec2(player->getVector().x, 0) );
              player->setRotation(0.0);
              inAir = false;
              break;
            }       
    ...