JULIA_SET, a C program which generates a TGA or TARGA graphics file of a Julia set.
We consider points (X,Y) in a rectangular domain R = [XL,XR]x[YB,YT]. (Here XL=-1.5, XR=+1.5, YB=-1.5, YT=+1.5.
For every (X,Y) in R, let Z be the complex number X+Yi, and let C be some complex constant. (Here, C=-0.8+0.156i.)
For each Z, consider the sequence of points:
Z(0) = Z, Z(k+1) = Z(k)^2 + C
The Julia set is the set of points Z in R with the property that the sequence of points Z(k) remain within R.
To compute a picture of the Julia set, we choose a discrete array of WxH points in R. We carry out up to 200 steps of the iteration for each point Z. If 1000 < |Z| at any time, we assume Z is not in the Julia set.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
JULIA_SET is available in a C version.
MANDELBROT, a C program which generates an ASCII PPM image of the Mandelbrot fractal set;
MANDELBROT_ASCII, a C program which generates an ASCII image of the Mandelbrot fractal set using just two lines of C.
MANDELBROT_OPENMP, a C program which generates an ASCII Portable Pixel Map (PPM) image of the Mandelbrot fractal set, using OpenMP for parallel execution.
TGA, a data directory which contains TGA or TARGA graphics file;