shithub: boids

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run the simulation in real-time.

--- a/main.c

+++ b/main.c

@@ -6,6 +6,8 @@

 #include <keyboard.h>

 #include <geometry.h>

+#define HZ2MS(hz)	(1000/(hz))

+

 enum {

 	TERMINALV = 40,

 	BORDER = 100

@@ -43,6 +45,8 @@

 Image *pal[NCOLOR];

 Flock *flock;

 int nbirds;

+int paused;

+QLock pauselk;

 void flockseparate(Flock*);

 void flockalign(Flock*);

@@ -240,10 +244,10 @@

 	static Menu menu = { .item = items };

 	char buf[128];

-	switch(menuhit(3, mc, &menu, nil)){

+	switch(menuhit(3, mc, &menu, _screen)){

 	case NBIRDS:

 		snprint(buf, sizeof buf, "%d", nbirds);

-		enter("nbirds", buf, sizeof buf, mc, kc, nil);

+		enter("nbirds", buf, sizeof buf, mc, kc, _screen);

 		nbirds = strtol(buf, nil, 10);

 	case RESET:

 		srand(time(nil));

@@ -267,12 +271,32 @@

 	case 'q':

 		threadexitsall(nil);

 	case ' ':

-		flock->step(flock);

+		if(paused)

+			qunlock(&pauselk);

+		else

+			qlock(&pauselk);

+		paused = !paused;

 		break;

 	}

 }

 void

+runsim(void *)

+{

+	Ioproc *io;

+

+	io = ioproc();

+

+	for(;;){

+		qlock(&pauselk);

+		flock->step(flock);

+		qunlock(&pauselk);

+		redraw();

+		iosleep(io, HZ2MS(24));

+	}

+}

+

+void

 usage(void)

 {

 	fprint(2, "usage: %s [-n nbirds]\n", argv0);

@@ -313,6 +337,7 @@

 	display->locking = 1;

 	unlockdisplay(display);

+	threadcreate(runsim, nil, mainstacksize);

 	redraw();

 	for(;;){