add the SoftBodyMotionProperties class

Android.mk

@@ -214,6 +214,7 @@ $(N)/glue/s/SkeletonPoseDrawSettings.cpp \
 $(N)/glue/s/SliderConstraint.cpp \
 $(N)/glue/s/SliderConstraintSettings.cpp \
 $(N)/glue/s/SoftBodyCreationSettings.cpp \
+$(N)/glue/s/SoftBodyMotionProperties.cpp \
 $(N)/glue/s/SoftBodySharedSettings.cpp \
 $(N)/glue/s/SpecifiedBroadPhaseLayerFilter.cpp \
 $(N)/glue/s/SpecifiedObjectLayerFilter.cpp \

src/main/java/com/github/stephengold/joltjni/Body.java

@@ -232,7 +232,11 @@ public MotionProperties getMotionProperties() {
             result = null;
         } else {
             long propertiesVa = getMotionProperties(bodyVa);
-            result = new MotionProperties(propertiesVa);
+            if (isSoftBody(bodyVa)) {
+                result = new SoftBodyMotionProperties(this, propertiesVa);
+            } else {
+                result = new MotionProperties(this, propertiesVa);
+            }
         }
 
         return result;

src/main/java/com/github/stephengold/joltjni/MotionProperties.java

@@ -1,5 +1,5 @@
 /*
-Copyright (c) 2024 Stephen Gold
+Copyright (c) 2024-2025 Stephen Gold
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -45,13 +45,14 @@ public MotionProperties() {
     }
 
     /**
-     * Instantiate with the specified native object assigned.
+     * Instantiate with the specified container and native object.
      *
+     * @param container the containing object, or {@code null} if none
      * @param propertiesVa the virtual address of the native object to assign
      * (not zero)
      */
-    MotionProperties(long propertiesVa) {
-        super(propertiesVa);
+    MotionProperties(JoltPhysicsObject container, long propertiesVa) {
+        super(container, propertiesVa);
     }
     // *************************************************************************
     // new methods exposed

src/main/native/glue/s/SoftBodyMotionProperties.cpp

@@ -0,0 +1,136 @@
+/*
+Copyright (c) 2025 Stephen Gold
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+ */
+
+/*
+ * Author: Stephen Gold
+ */
+#include "Jolt/Jolt.h"
+#include "Jolt/Physics/SoftBody/SoftBodyMotionProperties.h"
+#include "auto/com_github_stephengold_joltjni_SoftBodyMotionProperties.h"
+
+using namespace JPH;
+
+/*
+ * Class:     com_github_stephengold_joltjni_SoftBodyMotionProperties
+ * Method:    countFaces
+ * Signature: (J)I
+ */
+JNIEXPORT jint JNICALL Java_com_github_stephengold_joltjni_SoftBodyMotionProperties_countFaces
+  (JNIEnv *, jclass, jlong propertiesVa) {
+    const SoftBodyMotionProperties * const pProperties
+            = reinterpret_cast<SoftBodyMotionProperties *> (propertiesVa);
+    const Array<SoftBodySharedSettings::Face>& faces = pProperties->GetFaces();
+    const Array<SoftBodySharedSettings::Face>::size_type result = faces.size();
+    return result;
+}
+
+/*
+ * Class:     com_github_stephengold_joltjni_SoftBodyMotionProperties
+ * Method:    countVertices
+ * Signature: (J)I
+ */
+JNIEXPORT jint JNICALL Java_com_github_stephengold_joltjni_SoftBodyMotionProperties_countVertices
+  (JNIEnv *, jclass, jlong propertiesVa) {
+    const SoftBodyMotionProperties * const pProperties
+            = reinterpret_cast<SoftBodyMotionProperties *> (propertiesVa);
+    const Array<SoftBodyVertex>& vertices = pProperties->GetVertices();
+    const Array<SoftBodyVertex>::size_type result = vertices.size();
+    return result;
+}
+
+/*
+ * Class:     com_github_stephengold_joltjni_SoftBodyMotionProperties
+ * Method:    customUpdate
+ * Signature: (JFJJ)V
+ */
+JNIEXPORT void JNICALL Java_com_github_stephengold_joltjni_SoftBodyMotionProperties_customUpdate
+  (JNIEnv *, jclass, jlong propertiesVa, jfloat deltaTime, jlong bodyVa, jlong systemVa) {
+    SoftBodyMotionProperties * const pProperties
+            = reinterpret_cast<SoftBodyMotionProperties *> (propertiesVa);
+    Body * const pBody = reinterpret_cast<Body *> (bodyVa);
+    PhysicsSystem * const pSystem = reinterpret_cast<PhysicsSystem *> (systemVa);
+    pProperties->CustomUpdate(deltaTime, *pBody, *pSystem);
+}
+
+/*
+ * Class:     com_github_stephengold_joltjni_SoftBodyMotionProperties
+ * Method:    getFace
+ * Signature: (JI)J
+ */
+JNIEXPORT jlong JNICALL Java_com_github_stephengold_joltjni_SoftBodyMotionProperties_getFace
+  (JNIEnv *, jclass, jlong propertiesVa, jint index) {
+    SoftBodyMotionProperties * const pProperties
+            = reinterpret_cast<SoftBodyMotionProperties *> (propertiesVa);
+    const SoftBodySharedSettings::Face& result = pProperties->GetFace(index);
+    return reinterpret_cast<jlong> (&result);
+}
+
+/*
+ * Class:     com_github_stephengold_joltjni_SoftBodyMotionProperties
+ * Method:    getNumIterations
+ * Signature: (J)I
+ */
+JNIEXPORT jint JNICALL Java_com_github_stephengold_joltjni_SoftBodyMotionProperties_getNumIterations
+  (JNIEnv *, jclass, jlong propertiesVa) {
+    const SoftBodyMotionProperties * const pProperties
+            = reinterpret_cast<SoftBodyMotionProperties *> (propertiesVa);
+    const uint32 result = pProperties->GetNumIterations();
+    return result;
+}
+
+/*
+ * Class:     com_github_stephengold_joltjni_SoftBodyMotionProperties
+ * Method:    getSettings
+ * Signature: (J)J
+ */
+JNIEXPORT jlong JNICALL Java_com_github_stephengold_joltjni_SoftBodyMotionProperties_getSettings
+  (JNIEnv *, jclass, jlong propertiesVa) {
+    SoftBodyMotionProperties * const pProperties
+            = reinterpret_cast<SoftBodyMotionProperties *> (propertiesVa);
+    const SoftBodySharedSettings * const pResult = pProperties->GetSettings();
+    return reinterpret_cast<jlong> (pResult);
+}
+
+/*
+ * Class:     com_github_stephengold_joltjni_SoftBodyMotionProperties
+ * Method:    getVertex
+ * Signature: (JI)J
+ */
+JNIEXPORT jlong JNICALL Java_com_github_stephengold_joltjni_SoftBodyMotionProperties_getVertex
+  (JNIEnv *, jclass, jlong propertiesVa, jint index) {
+    SoftBodyMotionProperties * const pProperties
+            = reinterpret_cast<SoftBodyMotionProperties *> (propertiesVa);
+    const SoftBodyVertex& result = pProperties->GetVertex(index);
+    return reinterpret_cast<jlong> (&result);
+}
+
+/*
+ * Class:     com_github_stephengold_joltjni_SoftBodyMotionProperties
+ * Method:    setNumIterations
+ * Signature: (JI)V
+ */
+JNIEXPORT void JNICALL Java_com_github_stephengold_joltjni_SoftBodyMotionProperties_setNumIterations
+  (JNIEnv *, jclass, jlong propertiesVa, jint numIterations) {
+    SoftBodyMotionProperties * const pProperties
+            = reinterpret_cast<SoftBodyMotionProperties *> (propertiesVa);
+    pProperties->SetNumIterations(numIterations);
+}