diff --git a/framework/opengl_renderer/src/mm/opengl/camera_3d.cpp b/framework/opengl_renderer/src/mm/opengl/camera_3d.cpp
index 082025d..882f9a2 100644
--- a/framework/opengl_renderer/src/mm/opengl/camera_3d.cpp
+++ b/framework/opengl_renderer/src/mm/opengl/camera_3d.cpp
@@ -72,17 +72,18 @@ glm::mat4 Camera3D::getProjection() const {
 glm::vec3 Camera3D::getViewDir(void) const {
 	glm::vec3 front {0,0,0};
 	{ // TODO: optimize
-#if 0
-		// if y up/down
-		front.x += up.y * glm::cos(pitch) * glm::cos(-yaw); // TODO: y is yaw inverted??
-		front.y += up.y * glm::sin(pitch);
-		front.z += up.y * glm::cos(pitch) * glm::sin(-yaw);
-#else
-		// if z up/down
-		front.x += up.z * glm::cos(pitch) * glm::cos(yaw);
-		front.y += up.z * glm::cos(pitch) * glm::sin(yaw);
-		front.z += up.z * glm::sin(pitch);
-#endif
+		if (up.y != 0.f) {
+			// if y up/down
+			front.x += up.y * glm::cos(pitch) * glm::cos(-yaw); // TODO: y is yaw inverted??
+			front.y += up.y * glm::sin(pitch);
+			front.z += up.y * glm::cos(pitch) * glm::sin(-yaw);
+		}
+		if (up.z != 0.f) {
+			// if z up/down
+			front.x += up.z * glm::cos(pitch) * glm::cos(yaw);
+			front.y += up.z * glm::cos(pitch) * glm::sin(yaw);
+			front.z += up.z * glm::sin(pitch);
+		}
 	}
 
 	front = glm::normalize(front);