RRayCast: add the getDirection() and getOrigin() methods

stephengold · Sep 20, 2024 · 693de5a · 693de5a
1 parent af3060c
commit 693de5a
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diff --git a/src/main/java/com/github/stephengold/joltjni/RRayCast.java b/src/main/java/com/github/stephengold/joltjni/RRayCast.java
@@ -53,6 +53,38 @@ public RRayCast(RVec3Arg startLocation, Vec3Arg offset) {
     // *************************************************************************
     // new methods exposed
 
+    /**
+     * Copy the end offset. The ray cast is unaffected. (native attribute:
+     * mDirection)
+     *
+     * @return a new offset vector (relative to the start location)
+     */
+    public Vec3 getDirection() {
+        long raycastVa = va();
+        float x = getDirectionX(raycastVa);
+        float y = getDirectionY(raycastVa);
+        float z = getDirectionZ(raycastVa);
+        Vec3 result = new Vec3(x, y, z);
+
+        return result;
+    }
+
+    /**
+     * Copy the start location. The ray cast is unaffected. (native attribute:
+     * mOrigin)
+     *
+     * @return a new location vector
+     */
+    public RVec3 getOrigin() {
+        long raycastVa = va();
+        double x = getOriginX(raycastVa);
+        double y = getOriginY(raycastVa);
+        double z = getOriginZ(raycastVa);
+        RVec3 result = new RVec3(x, y, z);
+
+        return result;
+    }
+
     /**
      * Return a point on the ray with the specified fraction. The ray cast is
      * unaffected.
@@ -77,6 +109,18 @@ native private static long createRRayCast(
 
     native private static void free(long raycastVa);
 
+    native private static float getDirectionX(long raycastVa);
+
+    native private static float getDirectionY(long raycastVa);
+
+    native private static float getDirectionZ(long raycastVa);
+
+    native private static double getOriginX(long raycastVa);
+
+    native private static double getOriginY(long raycastVa);
+
+    native private static double getOriginZ(long raycastVa);
+
     native private static double getPointOnRayX(long raycastVa, float fraction);
 
     native private static double getPointOnRayY(long raycastVa, float fraction);

diff --git a/src/main/native/glue/r/RRayCast.cpp b/src/main/native/glue/r/RRayCast.cpp
@@ -57,6 +57,81 @@ JNIEXPORT void JNICALL Java_com_github_stephengold_joltjni_RRayCast_free
     delete pRayCast;
 }
 
+/*
+ * Class:     com_github_stephengold_joltjni_RRayCast
+ * Method:    getDirectionX
+ * Signature: (J)F
+ */
+JNIEXPORT jfloat JNICALL Java_com_github_stephengold_joltjni_RRayCast_getDirectionX
+  (JNIEnv *, jclass, jlong raycastVa) {
+    const RRayCast * const pRayCast = reinterpret_cast<RRayCast *> (raycastVa);
+    const float result = pRayCast->mDirection.GetX();
+    return result;
+}
+
+/*
+ * Class:     com_github_stephengold_joltjni_RRayCast
+ * Method:    getDirectionY
+ * Signature: (J)F
+ */
+JNIEXPORT jfloat JNICALL Java_com_github_stephengold_joltjni_RRayCast_getDirectionY
+  (JNIEnv *, jclass, jlong raycastVa) {
+    const RRayCast * const pRayCast = reinterpret_cast<RRayCast *> (raycastVa);
+    const float result = pRayCast->mDirection.GetY();
+    return result;
+}
+
+/*
+ * Class:     com_github_stephengold_joltjni_RRayCast
+ * Method:    getDirectionZ
+ * Signature: (J)F
+ */
+JNIEXPORT jfloat JNICALL Java_com_github_stephengold_joltjni_RRayCast_getDirectionZ
+  (JNIEnv *, jclass, jlong raycastVa) {
+    const RRayCast * const pRayCast = reinterpret_cast<RRayCast *> (raycastVa);
+    const float result = pRayCast->mDirection.GetZ();
+    return result;
+}
+
+/*
+ * Class:     com_github_stephengold_joltjni_RRayCast
+ * Method:    getOriginX
+ * Signature: (J)D
+ */
+JNIEXPORT jdouble JNICALL Java_com_github_stephengold_joltjni_RRayCast_getOriginX
+  (JNIEnv *, jclass, jlong raycastVa) {
+    const RRayCast * const pRayCast = reinterpret_cast<RRayCast *> (raycastVa);
+    const RVec3 rvec3 = pRayCast->mOrigin;
+    const double result = rvec3.GetX();
+    return result;
+}
+
+/*
+ * Class:     com_github_stephengold_joltjni_RRayCast
+ * Method:    getOriginY
+ * Signature: (J)D
+ */
+JNIEXPORT jdouble JNICALL Java_com_github_stephengold_joltjni_RRayCast_getOriginY
+  (JNIEnv *, jclass, jlong raycastVa) {
+    const RRayCast * const pRayCast = reinterpret_cast<RRayCast *> (raycastVa);
+    const RVec3 rvec3 = pRayCast->mOrigin;
+    const double result = rvec3.GetY();
+    return result;
+}
+
+/*
+ * Class:     com_github_stephengold_joltjni_RRayCast
+ * Method:    getOriginZ
+ * Signature: (J)D
+ */
+JNIEXPORT jdouble JNICALL Java_com_github_stephengold_joltjni_RRayCast_getOriginZ
+  (JNIEnv *, jclass, jlong raycastVa) {
+    const RRayCast * const pRayCast = reinterpret_cast<RRayCast *> (raycastVa);
+    const RVec3 rvec3 = pRayCast->mOrigin;
+    const double result = rvec3.GetZ();
+    return result;
+}
+
 /*
  * Class:     com_github_stephengold_joltjni_RRayCast
  * Method:    getPointOnRayX