minor cleanup

- remove / comment unused python vars
- replace mul_v3_fl(somevec, -1.0f); with negate_v3(somevec);

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/blenkernel/intern/particle_system.c b/source/blender/blenkernel/intern/particle_system.c
index cb12230615e..74fd8ff128b 100644
--- a/source/blender/blenkernel/intern/particle_system.c
+++ b/source/blender/blenkernel/intern/particle_system.c
@@ -2679,7 +2679,7 @@ static float nr_signed_distance_to_plane(float *p, float radius, ParticleCollisi
 	}
 
 	if(pce->inv_nor == 1) {
-		mul_v3_fl(nor, -1.f);
+		negate_v3(nor);
 		d = -d;
 	}
 
@@ -2799,7 +2799,7 @@ static void collision_point_on_surface(float p[3], ParticleCollisionElement *pce
 				normalize_v3(nor);
 
 				if(pce->inv_nor == 1)
-					mul_v3_fl(nor, -1.f);
+					negate_v3(nor);
 
 				madd_v3_v3v3fl(co, pce->x0, nor, col->radius);
 				madd_v3_v3fl(co, e1, pce->uv[0]);