2 files changed, 22 insertions(+), 3 deletions(-)

M Makefile
M README.md

@@ 1,7 1,9 @@
 CC=gcc
 
 all:
-	$(CC) quad.c -L/usr/local/lib -lSDL2 -lm -o quad
+	$(CC) quad.c -lSDL2 -lm -o quad
+
+run: all
 	./quad
 
 clean:

@@ 1,9 1,26 @@
 # Quad
 
-Needs the `sdl2-dev` package, run with `make`.
-
 ![Sierpinski Triangle](https://www.leonrische.me/pages/images/quad/quad1.png)
 
+## Installation
+
+Depends on the `sdl2-dev` package.
+Run with `make run`.
+
+## Interface
+
+1. There are 8 rules
+2. Rules are referenced by a small squares indicating their position in
+   the editor interface
+3. Each rule has one slot for each quadrant of the image
+4. Each rule has a fallback slot that's used when a square gets too
+   small to be subdivided further
+5. Slots can contain patterns or references to rules
+6. The fallback slot can only contain a pattern
+7. To place a pattern in a slot, drag it from the pallette at the top
+8. To place a reference to a rule in a slot, drag its small squares (the
+   larger square region below it) into the slot
+
 ## Controls
 
 - `q` quit