X-Git-Url: https://jasonwoof.com/gitweb/?p=vor.git;a=blobdiff_plain;f=dust.c;h=4eeeb8b034a23f1c4ef8e2c3998801998528eb7e;hp=691649d412b821b42f83766a3af059a361b6a4c3;hb=fe549d406b589b1c3db83aeea28c911292a5968e;hpb=841f94c4182f8dff0253db9bae4922c3c9039a5f

diff --git a/dust.c b/dust.c
index 691649d..4eeeb8b 100644
--- a/dust.c
+++ b/dust.c
@@ -4,6 +4,7 @@
 #include "config.h"
 #include "globals.h"
 #include "dust.h"
+#include "float.h"
 #include "mt.h"
 
 struct dust_mote {
@@ -27,16 +28,18 @@ init_dust(void)
 }
 
 void
-move_dust(void)
+move_dust(float ticks)
 {
 	int i;
+	float xscroll = screendx * ticks;
+	float yscroll = screendy * ticks;
+	
 	for(i=0; i<N_DUST_MOTES; i++) {
 		motes[i].x -= xscroll / (1.3 + motes[i].z);
+		motes[i].x = fwrap(motes[i].x, XSIZE);
+
 		motes[i].y -= yscroll / (1.3 + motes[i].z);
-		if(motes[i].y >= XSIZE) motes[i].x -= XSIZE;
-		else if(motes[i].x < 0) motes[i].x += XSIZE;
-		if(motes[i].y > YSIZE) motes[i].y -= YSIZE;
-		else if(motes[i].y < 0) motes[i].y += YSIZE;
+		motes[i].y = fwrap(motes[i].y, YSIZE);
 	}
 }