graw.c

Graphical Drawing Library

Overview

This library generates an output file as a rendered image of two-dimensional input data in Cartisian coordinates.

Interface

function

points_plot

int points_plot(int x_values[], int y_values[], int values[], unsigned int points_size);

Parses a pair of coordinates (X,Y) and their corresponding value into a line plot.

The function will write a P3 variant Portable Pixel Map file to at the path: outputs/plot_points.ppm.

Testing

Executing the main function in example.c with generate a test image.

The graw.py file uses ctypes allow usage of graw.c interface as a foriegn function library to extend its usage into Python.

On a Linux machine run:

gcc -std=c99 -fPIC -shared -o graw.so graw.c - to build the shared library

python graw.py - to run generate the test visualization from the Python environment