vector shift implemented

src/aabb.rs

@@ -42,7 +42,7 @@ impl Aabb{
 		self.max-self.min
 	}
 	pub fn center(&self)->Planar64Vec3{
-		self.min+(self.max-self.min).map(|v|v>>1)
+		self.min+(self.max-self.min)>>1
 	}
 	//probably use floats for area & volume because we don't care about precision
 	// pub fn area_weight(&self)->f32{