X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?p=xscreensaver;a=blobdiff_plain;f=hacks%2Fshadebobs.c;fp=hacks%2Fshadebobs.c;h=d1361dd3aa4f23ed8d460cb3d65f73e7efe9e22d;hp=64fa82c9772d7e28b3ba7a87d3f74e4fd00fd6e1;hb=8afc01a67be4fbf3f1cc0fce9adf01b5289a21c6;hpb=3f1091236d800c43a3124c44c7da54e53f205b13

diff --git a/hacks/shadebobs.c b/hacks/shadebobs.c
index 64fa82c9..d1361dd3 100644
--- a/hacks/shadebobs.c
+++ b/hacks/shadebobs.c
@@ -147,8 +147,11 @@ static void MoveShadeBob( struct state *st, SShadeBob *pShadeBob )
 	pShadeBob->nAngle	   += pShadeBob->nAngleInc;
 	pShadeBob->nAngleDelta -= pShadeBob->nAngleInc;
 
-	if( pShadeBob->nAngle >= st->iDegreeCount )	pShadeBob->nAngle -= st->iDegreeCount;
-	else if( pShadeBob->nAngle < 0 )		pShadeBob->nAngle += st->iDegreeCount;
+	/* Since it can happen that nAngle < 0 and nAngle + iDegreeCount >= iDegreeCount
+	   on floating point, we set some marginal value.
+	*/
+	if( pShadeBob->nAngle + 0.5 >= st->iDegreeCount )	pShadeBob->nAngle -= st->iDegreeCount;
+	else if( pShadeBob->nAngle < -0.5 )		pShadeBob->nAngle += st->iDegreeCount;
 	
 	if( ( pShadeBob->nAngleInc>0.0F  && pShadeBob->nAngleDelta<pShadeBob->nAngleInc ) ||
 	    ( pShadeBob->nAngleInc<=0.0F && pShadeBob->nAngleDelta>pShadeBob->nAngleInc ) )