C++ SDL2: How to join two windows in one: top_Window + bottom_Window?

Question

I have a code where the camera scroll left, right, up, down, and I would like to add a progress bar similar to the one below at the bottom of my window

Is it possible to create the progress bar in a different window and then join my top game window with this new window, so they can render at different times? If not (by using only one window) when scrolling up and down I would have that progress bar in the way, indeed my camera is set to the exact dimension of window height and window width and currently works flawlessly without that bar because the bar is not part of my current texture.

Any suggestion how to join two windows in one? I have created the bottom_Window so far (so I can try to develop the progress bar) but I want it to be fully merged with the top one (the actual game) so they can be moved at the same time)

Many thanks!

Answer 1

The X, Y positions of Player and Backgrounds were rendered relative to the camera:

Example:

const SDL_Rect PlayerQuad = {(int)(Player.XPosition - Camera.XPosition), (int)(Player.YPosition - Camera.YPosition), (int)Player.Width, (int)Player.Height};

SDL_RenderCopy(pRenderer, Player.playerTexturewr, nullptr, &PlayerQuad);

The X, Y positions of the progressing bar had to be rendered NON RELATIVE TO THE CAMERA):

const SDL_Rect BarQuad = {(int)Bar.XPosition, (int)Bar.YPosition, (int)Bar.Width, (int)Bar.Height}; SDL_RenderFillRect(pRenderer, &BarQuad);