Скачать или смотреть How to Fix Your Pygame Bullet Sprite That Only Fires Once Each Loop

Discover how to enable multiple bullet firing in `Pygame`, ensuring a smooth shooting mechanic for your game.
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This video is based on the question https://stackoverflow.com/q/62364423/ asked by the user 'Sarab Singh' ( https://stackoverflow.com/u/13741163/ ) and on the answer https://stackoverflow.com/a/62364905/ provided by the user 'Rabbid76' ( https://stackoverflow.com/u/5577765/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Getting Your Pygame Bullets to Fire Multiple Times

If you are a budding Pygame developer, you may find yourself facing the challenge of shooting multiple bullets with your ship. It's a common issue: every time you press the spacebar to shoot, only a single bullet is triggered, and the bullets don't last long enough on the screen. In this guide, we'll address this problem and guide you through the necessary adjustments to let your ship fire multiple bullets effectively.

Understanding the Problem

When you press the spacebar in your game to fire a bullet, the current implementation only draws the most recently created bullet each frame. This oversight prevents previous bullets from being displayed correctly, making it seem like you can only fire one at a time.

Symptoms to Look Out For

Bullets disappear immediately after firing.

Only the last bullet fired is being rendered on the screen.

Let’s dive into how to solve this issue!

Solution Steps

To allow multiple bullets to be fired and remain visible, follow these organized steps:

Step 1: Correct the Drawing Logic

The key part of the solution involves changing how you draw the bullets onto the screen. Instead of referencing self.new_bullet for drawing, you should loop through all the bullets in your self.bullets group.

Here’s the change you need to make in your run_game method:

Replace this code:

[[See Video to Reveal this Text or Code Snippet]]

With this code:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Ensure Bullet Creation is Handled Properly

In your existing code, make sure that every time the spacebar is pressed, a new bullet instance is created and added to the self.bullets group. This is already being done in your code:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Update Bullets Continuously

The self.bullets.update() call in your game loop is essential to move the bullets as they are fired. Ensure that their update function modifies their position, so they travel across the screen.

Final Adjusted Code Snippet

Below is a condensed snippet of your run_game function focusing on the relevant parts for clarity:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By making these relatively simple changes, you can successfully implement a mechanic that allows your ship to fire multiple bullets. This enhancement not only improves gameplay experience but also gives you a better understanding of how sprite groups work in Pygame. Happy coding, and may your spaceship shoot efficiently!