From 42d0513f68ebb1019f41c62681eff6bef62c474d Mon Sep 17 00:00:00 2001
From: Alex Bilger <alexbilger0@gmail.com>
Date: Wed, 7 Oct 2026 11:37:10 +0200
Subject: [PATCH] adapt Mapping_Trampoline

---
 .../src/SofaPython3/Sofa/Core/Binding_Mapping.cpp     | 11 ++++++++---
 .../Sofa/src/SofaPython3/Sofa/Core/Binding_Mapping.h  |  6 +++++-
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_Mapping.cpp b/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_Mapping.cpp
index 91f180391..428307f53 100644
--- a/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_Mapping.cpp
+++ b/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_Mapping.cpp
@@ -96,8 +96,13 @@ namespace sofapython3
                                PythonFactory::toPython(&out), PythonFactory::toPython(&in));
     }
 
-    template<class In, class Out>
-    void Mapping_Trampoline<In, Out>::applyJ( const MechanicalParams* mparams, OutDataVecDeriv& out, const InDataVecDeriv& in){
+    template <class In, class Out>
+    void Mapping_Trampoline<In, Out>::doApplyJacobianVectorProduct(
+        const MechanicalParams *mparams, OutDataVecDeriv &tangentOut,
+        const InDataVecDeriv &tangentIn, const InDataVecCoord &positionIn) {
+
+        SOFA_UNUSED(positionIn);
+
         PythonEnvironment::gil acquire;
 
         // pass bFactor, kFactor, energy
@@ -109,7 +114,7 @@ namespace sofapython3
                                "energy"_a=mparams->energy());
 
         PYBIND11_OVERLOAD_PURE(void, Inherit1, applyJ, mp,
-                               PythonFactory::toPython(&out), PythonFactory::toPython(&in));
+                               PythonFactory::toPython(&tangentOut), PythonFactory::toPython(&tangentIn));
     }
 
     template<class In, class Out>
diff --git a/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_Mapping.h b/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_Mapping.h
index 362c20395..ad4c42fd5 100644
--- a/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_Mapping.h
+++ b/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_Mapping.h
@@ -50,7 +50,11 @@ class Mapping_Trampoline : public sofa::core::Mapping<In, Out> {
     std::string getClassName() const override;
 
     void apply( const MechanicalParams* mparams, OutDataVecCoord& out, const InDataVecCoord& in) override;
-    void applyJ( const MechanicalParams* mparams, OutDataVecDeriv& out, const InDataVecDeriv& in) override;
+    void doApplyJacobianVectorProduct(
+        const MechanicalParams* mparams,
+        OutDataVecDeriv& tangentOut,
+        const InDataVecDeriv& tangentIn,
+        const InDataVecCoord& positionIn) override;
     void applyJT( const MechanicalParams* mparams, InDataVecDeriv& out, const OutDataVecDeriv& in) override;
     void applyJT( const ConstraintParams* mparams, InDataMatrixDeriv& out, const OutDataMatrixDeriv& in) override;