From 0d7ff567e66a55f8a219caaf46614b613c58a6c4 Mon Sep 17 00:00:00 2001
From: Xuchen Han <xuchenhan2015@u.northwestern.edu>
Date: Wed, 9 Oct 2019 00:38:13 -0700
Subject: [PATCH] bug fix in deformable predict motion

---
 src/BulletSoftBody/btDeformableBodySolver.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/BulletSoftBody/btDeformableBodySolver.cpp b/src/BulletSoftBody/btDeformableBodySolver.cpp
index 197ef7221..1dba88698 100644
--- a/src/BulletSoftBody/btDeformableBodySolver.cpp
+++ b/src/BulletSoftBody/btDeformableBodySolver.cpp
@@ -336,14 +336,14 @@ bool btDeformableBodySolver::updateNodes()
 
 void btDeformableBodySolver::predictMotion(btScalar solverdt)
 {
+    // apply explicit forces to velocity
+    m_objective->applyExplicitForce(m_residual);
     for (int i = 0; i < m_softBodies.size(); ++i)
     {
         btSoftBody *psb = m_softBodies[i];
         
         if (psb->isActive())
         {
-            // apply explicit forces to velocity
-            m_objective->applyExplicitForce(m_residual);
             // predict motion for collision detection
             predictDeformableMotion(psb, solverdt);
         }