GeoLib

Informations

Presentation

GeoLib is a Python library to draw geometrical shapes on CG screen.

This little library was coded on the calculator directly, so I apologize for the code quality (such as space, indentation etc). ^^'

Licence

The project are under licence GNU General Public Licence v3.0

Available functions

Circle

An implementation of Bresenham's algorythm

circle(x_center, y_center, radius, color)

Line

It's also Bresenham

line(x_start, y_start, x_end, y_end, color)

Polygon

Allow to draw a polygon on the screen

polygon(*coordinates, **kwargs)

• *coordinates is the coordinates of the verticies of the polygon
• **kwargs match to two arguments : the fill pattern and the color

Exemple :

polygone((1, 1), (10, 1), (1, 10), color=(150, 0, 0), fill='full') will draw a triangle fill with red

Progress bar

It's a funny functions but I don't think it's really useful

progress_bar(x, y, width, height, percentage, color)

Rectangle

It's an optimized version of polygon for rectangle

rectangle(x, y, width, height, **kwargs)

• **kwargs as it is for polygon, **kwargs correspond to the fill pattern and the color

Arguments

This section will give you some details about tricky arguments

Color

Color correspond to the color of the shape you want to draw. This is a tuple of three elements that corresponding to the RGB. The default value is black.

Some exemples :

• color=(0, 0, 0) : black
• color=(255, 255, 255) : white
• color=(255, 0, 0) : red
• color=(0, 255, 0) : green
• color=(0, 0, 255) : blue

Fill pattern

For some shapes you can decide to fill them with a pattern. The syntax is quiet easy : fill='my_pattern' (don't forget to quote the choosen pattern)

Now let see the available patterns :

• 'full' : will totally fill the shape with the given color
• 'squared' : will fill one pixel out of two
• 'opaque' : will erase the background under the shape

Per default, your shape is transparent.