How to slow down Snake game transition from moving right to moving down with SDL2?

Asked May 11 '18 at 18:06

Active May 11 '18 at 20:08

Viewed 441 times

im making a Snake game in C++ with SDL2. When the snake moves towards the right and the user presses the down arrow key, im removing the tail and adding a new head like this:

void SnakeGame::TransitionDown() {
    for (SnakePart snakePart : parts) {
        RemoveTail();
        NewHead();
    }
    direction = 3;
} 

void SnakeGame::RemoveTail() {
    parts.erase(parts.end() - 1);
}

void SnakeGame::NewHead() {
    SnakePart sp;
    sp.LoadPart(GameWindow, GameRenderer, GetHeadXPosition(), GetHeadYPosition() + 18);
    parts.insert(parts.begin(), sp);
}

If i put a for loop inside the TransitionDown() function and increment it just a portion of the snake size, i can see that it transitions the way i want - just that its doing it way too fast! Is there any way i can remove the tail and add a new head, and then wait abit before repeating?

asked May 11 '18 at 18:06

ImStupid

Modifying `parts` while iterating over them most likely is Undefined Beavior. – user7860670 May 11 '18 at 18:20
I know, but that is not my question :D I have made it work somehow :)) – ImStupid May 11 '18 at 18:25
Check your platform to see if it has a `sleep` or `delay` function. – Thomas Matthews May 11 '18 at 20:21
You could use nested `for` loops to create a delay. – Thomas Matthews May 11 '18 at 20:22

How to slow down Snake game transition from moving right to moving down with SDL2?

0 Answers0