scrollable map - Githubissues

To implement zooming and scrolling in your 2D SFML program for rendering stars on a window in Linux, you'll need to manage the view and transformation of the rendering. Here are the steps you can follow:

Setup Your View: Create an SFML sf::View object to manage the view of your window. This view will determine what portion of your world is visible.
```
sf::View view;
window.setView(view);
```
Zooming: To implement zooming in and out, you can use the sf::View::zoom function. You can adjust the zoom level based on user input, such as mouse wheel events or keyboard shortcuts.
```
// Zoom in
view.zoom(0.8f);

// Zoom out
view.zoom(1.2f);
```
Scrolling: For scrolling, you'll need to adjust the center of your view to change the focus of your window. You can do this based on user input, such as arrow keys or dragging with the mouse.
```
// Scroll left
view.move(-10.0f, 0.0f);

// Scroll right
view.move(10.0f, 0.0f);

// Scroll up
view.move(0.0f, -10.0f);

// Scroll down
view.move(0.0f, 10.0f);
```
Rendering: When rendering your stars, you'll need to take into account the view's transformation. You can do this by setting the view before drawing your stars.
```
window.setView(view);
window.draw(stars);
```
Where stars is the collection of star sprites or objects you want to render.

Handling User Input: You'll need to implement input handling to capture user actions for zooming and scrolling. You can use the SFML event system to capture user input and adjust the view accordingly.

sf::Event event;
while (window.pollEvent(event)) {
   if (event.type == sf::Event::MouseWheelScrolled) {
       if (event.mouseWheelScroll.delta > 0) {
           // Zoom in
           view.zoom(0.8f);
       } else {
           // Zoom out
           view.zoom(1.2f);
       }
   }
   // Handle other events for scrolling (e.g., arrow keys).
}

Remember to adjust the values for zoom and scroll amounts as per your requirements. This basic structure should give you a starting point to implement zooming and scrolling in your SFML program. You can expand upon this foundation to add more features or fine-tune the behavior according to your specific needs.

laserkestrel / starmap

scrollable map #5