From d7c565d88533c415d392f908d17f6010f3011a11 Mon Sep 17 00:00:00 2001
From: Asa Hammond <asahammond@gmail.com>
Date: Thu, 25 Feb 2021 18:37:10 -0800
Subject: [PATCH] static const for placeholder vars

---
 gtsam/navigation/ConstantVelocityFactor.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gtsam/navigation/ConstantVelocityFactor.h b/gtsam/navigation/ConstantVelocityFactor.h
index f676108ce..f5a35947f 100644
--- a/gtsam/navigation/ConstantVelocityFactor.h
+++ b/gtsam/navigation/ConstantVelocityFactor.h
@@ -35,8 +35,8 @@ class ConstantVelocityFactor : public NoiseModelFactor2<NavState, NavState> {
                                 boost::optional<gtsam::Matrix &> H1 = boost::none,
                                 boost::optional<gtsam::Matrix &> H2 = boost::none) const override {
         // only used to use update() below
-        const Vector3 b_accel{0.0, 0.0, 0.0};
-        const Vector3 b_omega{0.0, 0.0, 0.0};
+        static const Vector3 b_accel{0.0, 0.0, 0.0};
+        static const Vector3 b_omega{0.0, 0.0, 0.0};
 
         Matrix predicted_H_x1;
         NavState predicted = x1.update(b_accel, b_omega, dt_, predicted_H_x1, {}, {});