Generates a 'height map' based on random perlin noise.
Thanks to nowl for the perlin noise algorithm implementation, and nothings for the stb image library
Compile:
gcc terrain_image.c -lm -o terrain_image
Running: The first 2 parameters should be the width and height of the image, which default to 1920x1080
The perlin noise generating algorith requires 2 parameters, frequency and depth. Since acquiring them from command line arguments is a pain, I decided to use envronment variables. To run this using frequency as, for example, 0.005 and depth as 10, run:
freq=0.005, depth=10 ./terrain_image
This will generate a jpg file called map.jpg. The output image is different each time the program is run.
I'm not 100% sure what exactly these 2 parameters do, so try playing around with them a bit, but the program crashes for values of depth above 26, but those shouldn't be necessary anyways
I've included some samples in the samples directory for reference
The samples are in the form <frequency>,<depth>.jpg