VertexAttributes: add a constructor and 3 public setters

Author: stephengold

src/main/java/com/github/stephengold/joltjni/VertexAttributes.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
@@ -36,6 +36,14 @@ public class VertexAttributes
     // *************************************************************************
     // constructors
 
+    /**
+     * Instantiate default attributes.
+     */
+    public VertexAttributes() {
+        long attributesVa = createDefault();
+        setVirtualAddress(attributesVa, () -> free(attributesVa));
+    }
+
     /**
      * Instantiate attributes as specified.
      *
@@ -90,6 +98,48 @@ public VertexAttributes(float compliance, float shearCompliance,
         setVirtualAddress(attributesVa, () -> free(attributesVa));
     }
     // *************************************************************************
+    // new methods exposed
+
+    /**
+     * Alter the compliance of normal/regular edges. (native attribute:
+     * mCompliance)
+     *
+     * @param compliance the desired compliance value
+     * @return the argument, for chaining
+     */
+    public float setCompliance(float compliance) {
+        long attributesVa = va();
+        setCompliance(attributesVa, compliance);
+
+        return compliance;
+    }
+
+    /**
+     * Alter the type of the long-range attachment (LRA) constraint. (native
+     * attribute: mLRAType)
+     *
+     * @param type the desired type (not null)
+     */
+    public void setLraType(ELraType type) {
+        long attributesVa = va();
+        int ordinal = type.ordinal();
+        setLraType(attributesVa, ordinal);
+    }
+
+    /**
+     * Alter the compliance of the shear edges. (native attribute:
+     * mShearCompliance)
+     *
+     * @param compliance the desired compliance value
+     * @return the argument, for chaining
+     */
+    public float setShearCompliance(float compliance) {
+        long attributesVa = va();
+        setShearCompliance(attributesVa, compliance);
+
+        return compliance;
+    }
+    // *************************************************************************
     // ConstVertexAttributes methods
 
     /**
@@ -170,6 +220,8 @@ native private static long createAttributes(
             float compliance, float shearCompliance, float bendCompliance,
             int ordinal, float lraMultiplier);
 
+    native private static long createDefault();
+
     native private static void free(long attributesVa);
 
     native private static float getBendCompliance(long attributesVa);
@@ -181,4 +233,12 @@ native private static long createAttributes(
     native private static int getLraType(long attributesVa);
 
     native private static float getShearCompliance(long attributesVa);
+
+    native private static void setCompliance(
+            long attributesVa, float compliance);
+
+    native private static void setLraType(long attributesVa, int ordinal);
+
+    native private static void setShearCompliance(
+            long attributesVa, float compliance);
 }

src/main/native/glue/v/VertexAttributes.cpp

@@ -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
@@ -47,6 +47,19 @@ JNIEXPORT jlong JNICALL Java_com_github_stephengold_joltjni_VertexAttributes_cre
     return reinterpret_cast<jlong> (pResult);
 }
 
+/*
+ * Class:     com_github_stephengold_joltjni_VertexAttributes
+ * Method:    createDefault
+ * Signature: ()J
+ */
+JNIEXPORT jlong JNICALL Java_com_github_stephengold_joltjni_VertexAttributes_createDefault
+  (JNIEnv *, jclass) {
+    SoftBodySharedSettings::VertexAttributes * const pResult
+            = new SoftBodySharedSettings::VertexAttributes();
+    TRACE_NEW("SoftBodySharedSettings::VertexAttributes", pResult)
+    return reinterpret_cast<jlong> (pResult);
+}
+
 /*
  * Class:     com_github_stephengold_joltjni_VertexAttributes
  * Method:    free
@@ -123,4 +136,42 @@ JNIEXPORT jfloat JNICALL Java_com_github_stephengold_joltjni_VertexAttributes_ge
             = reinterpret_cast<SoftBodySharedSettings::VertexAttributes *> (attributesVa);
     const float result = pAttributes->mShearCompliance;
     return result;
+}
+
+/*
+ * Class:     com_github_stephengold_joltjni_VertexAttributes
+ * Method:    setCompliance
+ * Signature: (JF)V
+ */
+JNIEXPORT void JNICALL Java_com_github_stephengold_joltjni_VertexAttributes_setCompliance
+  (JNIEnv *, jclass, jlong attributesVa, jfloat compliance) {
+    SoftBodySharedSettings::VertexAttributes * const pAttributes
+            = reinterpret_cast<SoftBodySharedSettings::VertexAttributes *> (attributesVa);
+    pAttributes->mCompliance = compliance;
+}
+
+/*
+ * Class:     com_github_stephengold_joltjni_VertexAttributes
+ * Method:    setLraType
+ * Signature: (JI)V
+ */
+JNIEXPORT void JNICALL Java_com_github_stephengold_joltjni_VertexAttributes_setLraType
+  (JNIEnv *, jclass, jlong attributesVa, jint ordinal) {
+    SoftBodySharedSettings::VertexAttributes * const pAttributes
+            = reinterpret_cast<SoftBodySharedSettings::VertexAttributes *> (attributesVa);
+    const SoftBodySharedSettings::ELRAType value
+            = (SoftBodySharedSettings::ELRAType) ordinal;
+    pAttributes->mLRAType = value;
+}
+
+/*
+ * Class:     com_github_stephengold_joltjni_VertexAttributes
+ * Method:    setShearCompliance
+ * Signature: (JF)V
+ */
+JNIEXPORT void JNICALL Java_com_github_stephengold_joltjni_VertexAttributes_setShearCompliance
+  (JNIEnv *, jclass, jlong attributesVa, jfloat compliance) {
+    SoftBodySharedSettings::VertexAttributes * const pAttributes
+            = reinterpret_cast<SoftBodySharedSettings::VertexAttributes *> (attributesVa);
+    pAttributes->mShearCompliance = compliance;
 }