Pygame how to fix 'trailing pixels'?

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In the image the red trail is a trail that pygame is creating when I have a bounding rectangle added around sprites. The sprite also does it and the simplest solution was to just clear the surface to black after each redraw. However attempting to do so on the entire main surface is not such a good idea. How can I fix this?

Normally you will do:

def draw():
    # fill screen with solid color.
    # draw, and flip/update screen.

But, you can update just dirty portions of the screen. See pygame.display.update():

pygame.display.update() Update portions of the screen for software displays update(rectangle=None) -> None update(rectangle_list) -> None

This function is like an optimized version of pygame.display.flip() for software displays. It allows only a portion of the screen to updated, instead of the entire area. If no argument is passed it updates the entire Surface area like pygame.display.flip().

You can pass the function a single rectangle, or a sequence of rectangles. It is more efficient to pass many rectangles at once than to call update multiple times with single or a partial list of rectangles. If passing a sequence of rectangles it is safe to include None values in the list, which will be skipped.

It's best to use it in combination with RenderUpdates, which is a Sprite.Group:

pygame.sprite.RenderUpdates Group sub-class that tracks dirty updates. RenderUpdates(*sprites) -> RenderUpdates This class is derived from pygame.sprite.Group(). It has an extended draw() method that tracks the changed areas of the screen.

What's New, Color('black') halts Python [HG 3445:5525f3e30956] Nov 25, 2015 Resolve Issue For Python 3.4, [HG 3336:56e0eadfc267] Oct 28, 2013 Bug fix: Segfault on  Pygame Installation ¶. Pygame requires Python; if you don't already have it, you can download it from python.org. Use python 3.6.1 or greater, because it is much friendlier to newbies, and additionally runs faster. The best way to install pygame is with the pip tool (which is what python uses to install packages).

Just have a black rectangle and blit that overtop of where your sprite was on the previous frame and that should get rid of it. Just remember to do this before you blit your sprite or your new sprite will be partly blacked out.

17. PyGame, The structure of the games we'll consider always follows this fixed pattern: import pygame def main(): """ Set up the game and run the main game loop  display_width = 800 display_height = 600 gameDisplay = pygame.display.set_mode( (display_width,display_height)) The functioning here is the same as before, but this time we're not hard coding the resolution. We want to use this method so that we can reference the variables.

Take the name of your screen. (For my case it's screen.) And do...

screen.fill((0, 0, 0))

Put that before the bliting and after the drawing. (It would make a black background.) Hope this helps!

How can I fix this code (Python 3)? : pygame, r/pygame: screen = pygame.display.set_mode((640, 480)) player being undefined, but I quickly stoped trying (to fix the code) as I did not know how to do so  Pygame uses surfaces for drawing. This means whenever we want to draw something to the screen it must be converted to a surface. There are many methods and functions within pygame that can do this easily for us. Installing Pygame. Installing pygame can be as easy as: 1. Opening your command prompt 2. Typing pip install pygame

If you want to avoid redrawing the whole screen, then just fix the region that was "damaged" by your sprite. Already suggested is to draw a black rectangle over where your sprite was. That works if your background is always completely black. However, if there was a background image, then you can copy just the damaged part of the background image back to the screen.

If the background is more dynamic, then another solution is to copy the part of the screen that you will cover with a sprite before drawing that sprite, and store it somewhere. Then draw the sprite, and flip the screen if necessary. Right before moving the sprite, copy the saved part of the background back to the screen, and then repeat all this over again.

Weird Pygame window problem (I NEED HELP) : pygame, You might be able to fix this by calling either pygame.display.flip() or pygame.​display.update() at the end of your while loop, so that the pygame  You don't need 64 bit Python on Win64 system, just install the 32bit versions of both Python and Pygame and they will work just fine (and there is a ton more modules

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PyGame: A Primer on Game Programming in Python – Real Python, In this step-by-step tutorial, you'll learn how to use PyGame. game loop to ensure that your program exits only when given the correct input. Just like the mixer module, the drawing API is fairly straightforward with a few examples. Therefore instead of re-iterating the documentation as part of this tutorial, I'll instead show you a few simple (and not-so-simple) examples of what can be doing with the draw module in PyGame and a few pitfalls to be aware of.

Pygame not compatible with MacOS Mojave · Issue #555, Running pip3 install pygame==2.0.0.dev4 should fix this issue. This is solve my problem.Thank you