From b0a5144672013b97851fa52cbc8d7f07c0457cf1 Mon Sep 17 00:00:00 2001
From: stephengold <sgold@sonic.net>
Date: Tue, 26 Nov 2024 10:10:48 -0800
Subject: [PATCH] SoftBodySharedSettings:  add the setMaterials() method

---
 .../joltjni/SoftBodySharedSettings.java          | 13 +++++++++++++
 .../native/glue/s/SoftBodySharedSettings.cpp     | 16 ++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/src/main/java/com/github/stephengold/joltjni/SoftBodySharedSettings.java b/src/main/java/com/github/stephengold/joltjni/SoftBodySharedSettings.java
index c1334fb2..24c60460 100644
--- a/src/main/java/com/github/stephengold/joltjni/SoftBodySharedSettings.java
+++ b/src/main/java/com/github/stephengold/joltjni/SoftBodySharedSettings.java
@@ -172,6 +172,17 @@ public void optimize() {
         long settingsVa = va();
         optimize(settingsVa);
     }
+
+    /**
+     * Alter the materials. (native attribute: mMaterials)
+     *
+     * @param material the desired material, or {@code null}
+     */
+    public void setMaterials(PhysicsMaterial material) {
+        long settingsVa = va();
+        long materialVa = (material == null) ? 0L : material.va();
+        setMaterialsSingle(settingsVa, materialVa);
+    }
     // *************************************************************************
     // ConstSoftBodySharedSettings methods
 
@@ -318,5 +329,7 @@ native private static void createConstraints(long settingsVa,
 
     native private static void setEmbedded(long settingsVa);
 
+    native static void setMaterialsSingle(long settingsVa, long materialVa);
+
     native private static long toRef(long settingsVa);
 }
diff --git a/src/main/native/glue/s/SoftBodySharedSettings.cpp b/src/main/native/glue/s/SoftBodySharedSettings.cpp
index 14125d02..5ed5a125 100644
--- a/src/main/native/glue/s/SoftBodySharedSettings.cpp
+++ b/src/main/native/glue/s/SoftBodySharedSettings.cpp
@@ -267,6 +267,22 @@ JNIEXPORT void JNICALL Java_com_github_stephengold_joltjni_SoftBodySharedSetting
     pSettings->SetEmbedded();
 }
 
+/*
+ * Class:     com_github_stephengold_joltjni_SoftBodySharedSettings
+ * Method:    setMaterialsSingle
+ * Signature: (JJ)V
+ */
+JNIEXPORT void JNICALL Java_com_github_stephengold_joltjni_SoftBodySharedSettings_setMaterialsSingle
+  (JNIEnv *, jclass, jlong settingsVa, jlong materialVa) {
+    SoftBodySharedSettings * const pSettings
+            = reinterpret_cast<SoftBodySharedSettings *> (settingsVa);
+    const PhysicsMaterial * const pMaterial
+            = reinterpret_cast<PhysicsMaterial *> (materialVa);
+    RefConst<PhysicsMaterial> ref = pMaterial;
+    pSettings->mMaterials.clear();
+    pSettings->mMaterials.push_back(ref);
+}
+
 /*
  * Class:     com_github_stephengold_joltjni_SoftBodySharedSettings
  * Method:    toRef