jmonkeyengine/engine/src/bullet-native/com_jme3_bullet_collision_shapes_HullCollisionShape.cpp

/*
 * Copyright (c) 2009-2010 jMonkeyEngine
 * All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
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 *
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 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
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 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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 */

/**
 * Author: Normen Hansen
 */
#include "com_jme3_bullet_collision_shapes_HullCollisionShape.h"
#include "jmeBulletUtil.h"
#include "BulletCollision/CollisionShapes/btConvexHullShape.h"

#ifdef __cplusplus
extern "C" {
#endif

    /*
     * Class:     com_jme3_bullet_collision_shapes_HullCollisionShape
     * Method:    createShape
     * Signature: ([F)J
     */
    JNIEXPORT jlong JNICALL Java_com_jme3_bullet_collision_shapes_HullCollisionShape_createShape
    (JNIEnv *env, jobject object, jobject array) {
        jmeClasses::initJavaClasses(env);
        float* data = (float*) env->GetDirectBufferAddress(array);
        //TODO: capacity will not always be length!
        int length = env->GetDirectBufferCapacity(array)/4;
        btConvexHullShape* shape = new btConvexHullShape();
        for (int i = 0; i < length; i+=3) {
            btVector3 vect = btVector3(data[i],
                    data[i + 1],
                    data[i + 2]);
            
            shape->addPoint(vect);
        }

        return reinterpret_cast<jlong>(shape);
    }

#ifdef __cplusplus
}
#endif