modules/voronoi: voronoi diagram module

This adds a voronoi diagram module, which when used as an overlay
produces a mosaic effect.

Some settings:

 cells=N             number of voronoi cells
 randomize={on,off}  randomizes the cell locations every frame
 dirty={on,off}      uses a faster sloppy/dithery-looking method

Some TODO items:

- use a more space efficient representation of the distance
  buffer, maybe use uint16_t relative offsets into the cells
  rather than pointers - capping their quantity to 64KiB

- anti-alias edges between cells

1 files changed, 2 insertions, 0 deletions

diff --git a/src/til.c b/src/til.c
index d7281ee..5d375c3 100644
--- a/src/til.c
+++ b/src/til.c
@@ -44,6 +44,7 @@ extern til_module_t	stars_module;
 extern til_module_t	submit_module;
 extern til_module_t	swab_module;
 extern til_module_t	swarm_module;
+extern til_module_t	voronoi_module;
 
 static const til_module_t	*modules[] = {
 	&blinds_module,
@@ -67,6 +68,7 @@ static const til_module_t	*modules[] = {
 	&submit_module,
 	&swab_module,
 	&swarm_module,
+	&voronoi_module,
 };