BodyInterface: add the createSoftBody() method

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

@@ -26,6 +26,7 @@ of this software and associated documentation files (the "Software"), to deal
 import com.github.stephengold.joltjni.enumerate.EMotionType;
 import com.github.stephengold.joltjni.readonly.ConstBodyCreationSettings;
 import com.github.stephengold.joltjni.readonly.ConstBodyId;
+import com.github.stephengold.joltjni.readonly.ConstSoftBodyCreationSettings;
 import com.github.stephengold.joltjni.readonly.QuatArg;
 import com.github.stephengold.joltjni.readonly.RVec3Arg;
 import com.github.stephengold.joltjni.readonly.Vec3Arg;
@@ -188,6 +189,22 @@ public BodyId createAndAddBody(
         return result;
     }
 
+    /**
+     * Create a soft body and add it to the physics system.
+     *
+     * @param settings the settings to use (not null, unaffected)
+     * @param activationMode whether to activate the body (not null)
+     * @return the ID of the created body, or an invalid ID when out of bodies
+     */
+    public BodyId createAndAddSoftBody(ConstSoftBodyCreationSettings settings,
+            EActivation activationMode) {
+        Body body = createSoftBody(settings);
+        BodyId result = body.getId();
+        addBody(result, activationMode);
+
+        return result;
+    }
+
     /**
      * Create a rigid body using the specified settings.
      *
@@ -229,6 +246,24 @@ public TwoBodyConstraint createConstraint(
         return result;
     }
 
+    /**
+     * Create a soft body using the specified settings.
+     *
+     * @param settings the settings to use (not null, unaffected)
+     * @return the new body
+     */
+    public Body createSoftBody(ConstSoftBodyCreationSettings settings) {
+        long bodyInterfaceVa = va();
+        long settingsVa = settings.va();
+        long bodyVa = createSoftBody(bodyInterfaceVa, settingsVa);
+        if (bodyVa == 0L) {
+            throw new IllegalStateException("ran out of bodies");
+        }
+        Body result = new Body(bodyVa);
+
+        return result;
+    }
+
     /**
      * Deactivate the specified body.
      *
@@ -679,6 +714,9 @@ native private static long createBody(
     native private static long createConstraint(long bodyInterfaceVa,
             long settingsVa, long body1IdVa, long body2IdVa);
 
+    native private static long createSoftBody(
+            long bodyInterfaceVa, long settingsVa);
+
     native private static void deactivateBody(
             long bodyInterfaceVa, long bodyIdVa);
 

src/main/native/glue/bo/BodyInterface.cpp

@@ -166,6 +166,21 @@ JNIEXPORT jlong JNICALL Java_com_github_stephengold_joltjni_BodyInterface_create
     return reinterpret_cast<jlong> (pResult);
 }
 
+/*
+ * Class:     com_github_stephengold_joltjni_BodyInterface
+ * Method:    createSoftBody
+ * Signature: (JJ)J
+ */
+JNIEXPORT jlong JNICALL Java_com_github_stephengold_joltjni_BodyInterface_createSoftBody
+  (JNIEnv *, jclass, jlong bodyInterfaceVa, jlong settingsVa) {
+    BodyInterface * const pInterface
+            = reinterpret_cast<BodyInterface *> (bodyInterfaceVa);
+    const SoftBodyCreationSettings * const pSettings
+            = reinterpret_cast<SoftBodyCreationSettings *> (settingsVa);
+    const Body * const pResult = pInterface->CreateSoftBody(*pSettings);
+    return reinterpret_cast<jlong> (pResult);
+}
+
 /*
  * Class:     com_github_stephengold_joltjni_BodyInterface
  * Method:    deactivateBody