Index: trunk/src/engine/particle_engine.cc
===================================================================
--- trunk/src/engine/particle_engine.cc	(revision 454)
+++ trunk/src/engine/particle_engine.cc	(revision 471)
@@ -231,5 +231,5 @@
 	datap->plane_normal = normalize_safe( datap->plane_normal, vec3(0.0f,1.0f,0.0f) );
 	datap->bounce       = table->get<float>("bounce", 0.0f );
-	datap->distance     = -math::dot( datap->plane_normal, datap->plane_point ) / math::sqrt( math::dot( datap->plane_normal, datap->plane_normal ) );
+	datap->distance     = -math::dot( datap->plane_normal, datap->plane_point ) / sqrt( math::dot( datap->plane_normal, datap->plane_normal ) );
 	return true;
 }
@@ -751,10 +751,10 @@
 					{
 						float emission_angle = math::radians( edata.angle );
-						float cos_theta = r.frange( math::cos( emission_angle ), 1.0f );
-						float sin_theta = math::sqrt(1.0f - cos_theta * cos_theta );
+						float cos_theta = r.frange( cos( emission_angle ), 1.0f );
+						float sin_theta = sqrt(1.0f - cos_theta * cos_theta );
 						float phi       = r.frange( 0.0f, 2* math::pi<float>() );
 						pinfo.velocity  = orient * 
-							( edata.odir * ( math::cos(phi) * sin_theta ) +
-							edata.cdir * ( math::sin(phi)*sin_theta ) +
+							( edata.odir * ( cos(phi) * sin_theta ) +
+							edata.cdir * ( sin(phi)*sin_theta ) +
 							edata.dir  * cos_theta );
 					}