geolm / flow

offline artistic image generator

flow

what

a command line program that produces high resolution png file with procedural 2d art

note : this is a on-going project, it is not finished. Only tested on my machines.

how

Based on flow fields and 2d distance fields

Signed distance fields are used to create the flow field.

anti-aliasing

Line/disc/triangle are rasterized with a king of MSAA, for each pixel we compute distance to the primitive for 256 samples positions. This part is written with AVX intrinsic because it's the most expensive functions.

multithread

Goal is to generate big high quality images (4k and more). Most computation happen on big array and can be splitted :

• array of angle can be computed separetly on multiple thread
• simulating points is independant, can be splitted
• rasterization also can be splitted in different bucket that prevent accessing to the same pixel

Task scheduler used : https://github.com/vurtun/mmx/blob/master/sched.h

color

Currently using r8g8b8a8 image but the plan is to use linear color in float and write hdr.

Using https://github.com/nothings/stb/blob/master/stb_image_write.h