2 files changed, 13 insertions(+), 16 deletions(-)

M README.md
M noton.c

@@ 2,6 2,8 @@
 
 A minimal logic gates playground, written in ANSI C.
 
+Right-click to add nodes, and left-click to add wires. Nodes will emit a positive signal if all the connected wires have the same polarity. The screen has timers to the left, and notes to the right. The default timers are 6 trackers, 4 sequencers and 2 pools.
+
 ## Build
 
 To build [noton](https://wiki.xxiivv.com/noton), you must have [SDL2](https://wiki.libsdl.org/) and [PortMidi](http://portmedia.sourceforge.net/portmidi/).


@@ 26,8 28,3 @@ cc noton.c -std=c89 -Os -DNDEBUG -g0 -s -Wall -L/usr/local/lib -lSDL2 -lportmidi
 
 - `mouse1` Stroke
 - `mouse1+mouse2` Gate
-
-### TODO
-
-- Don't change polarity twice per frame.
-- export image

@@ 20,7 20,7 @@
 #define INPUTMAX 12
 #define OUTPUTMAX 12
 
-#define CHANNELS 8
+#define CHANNELS 4
 #define DEVICE 0
 
 typedef enum {


@@ 450,16 450,16 @@ void
 run(Noton *n)
 {
 	int i;
-	n->inputs[0]->polarity = (n->frame / 4) % 2;
-	n->inputs[2]->polarity = (n->frame / 8) % 2;
-	n->inputs[4]->polarity = (n->frame / 16) % 2;
-	n->inputs[6]->polarity = (n->frame / 32) % 2;
-	n->inputs[8]->polarity = (n->frame / 64) % 2;
-	n->inputs[10]->polarity = (n->frame / 128) % 2;
-	n->inputs[1]->polarity = (n->frame / 8) % 4 == 0;
-	n->inputs[3]->polarity = (n->frame / 8) % 4 == 1;
-	n->inputs[5]->polarity = (n->frame / 8) % 4 == 2;
-	n->inputs[7]->polarity = (n->frame / 8) % 4 == 3;
+	n->inputs[0]->polarity = (n->frame >> 2) % 2;
+	n->inputs[2]->polarity = (n->frame >> 3) % 2;
+	n->inputs[4]->polarity = (n->frame >> 4) % 2;
+	n->inputs[6]->polarity = (n->frame >> 5) % 2;
+	n->inputs[8]->polarity = (n->frame >> 6) % 2;
+	n->inputs[10]->polarity = (n->frame >> 7) % 2;
+	n->inputs[1]->polarity = (n->frame >> 3) % 4 == 0;
+	n->inputs[3]->polarity = (n->frame >> 3) % 4 == 1;
+	n->inputs[5]->polarity = (n->frame >> 3) % 4 == 2;
+	n->inputs[7]->polarity = (n->frame >> 3) % 4 == 3;
 	n->inputs[9]->polarity = 1;
 	n->inputs[11]->polarity = 0;
 	for(i = 0; i < n->glen; ++i)