Peter de Jong Attractor in Python

It's pretty simple and I have specially given the code in python which demonstrates the concept. For details on Attractors please refer wikipedia. I have used the Python pygame module for graphics.

Here's the end result:-

Here's the code:

I have used two custom fonts as you can see in the code above. You can get them from here and here. You can use either system font or download two new fonts and put them in the same execution directory. Make sure you edit the code with proper font names. 

self.xn, self.yn = ( sin( self.constants["a"] * self.yn ) - cos ( self.constants["b"] \
                                   * self.xn ) ), ( sin( self.constants["c"] * self.xn ) - cos( self.constants["d"] * self.yn ) )
                   #  xn, yn = ( d * sin( a * xn ) - sin ( b * yn ) ), ( c * cos( a * xn ) + cos( b * yn ) )
                   self.coords.append( ( self.xn, self.yn ) )
                   pygame.draw.circle( self.screen, self.grayshade , ( self.width // 2 + \
                                           int( 120 * self.xn ), self.height // 2 + int( 120 * self.yn ) ), 1, 1 )

Changing the constants a,b, c and varying the number of iteration you can create many more custom shapes. So be creative and start hacking!

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Bouncing Box animation in Python using PyGame

Bouncy is a class which demonstrates Bouncing rectangle animation which options like resolution, bouncy rectangle size, speed. Whenever it collides with the borders or wall it plays a sound. The code doesn't have any Magic Numbers, everything has been named pretty well so that it is readable to most and many error handling cases has been handled (These being the reason that the code is long else it can be reduced).

How to use ?

Just initialize the class with the parameters. if you don't give any params a default value is taken.

Download the Sound from here : https://mega.co.nz/#!45VTzKxK!vsx-IBhnGNEGvoZMSYdCod_ORMjsfEQ4YxcE3DW8Z28

Parameters :-

1. resolution : Takes a tuple of values for Screen Size like (800, 600). Default Value : (640, 480)
2. rectobj_size : Takes a tuple of values for rectangle object size like (40, 30). Default Value : (50, 50)
3. speed : Animation Speed. Min value 1

Example :-

Bouncy( ( 600, 400 ), ( 40, 40 ), 5 ) or Bouncy( resolution = ( 600, 400 ), rectobj_size = ( 40, 40 ), speed = 5 )

Code:

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Create basic shapes using PyGame

We create a basic window in Python and draw the basic geometrical shapes like Rectangle, Circle, Line, ellipse or polygon etc. You should have pygame installed else the code will not execute and throw an ImportError.

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Explosion Animation using Spritesheets in PyGame

I made an explosion animation using PyGame with Spritesheets. The following code serves as an example which shows how to use sprite sheets for making animations.

SpriteSheet Used




Output

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