Method build3d

src/main/java/marc/math/Flann.java:111–126

(List<T> d, Function<T, Vec3> t)

    }

    public <T> void build3d(List<T> d, Function<T, Vec3> t) {
        free();

        FloatBuffer f = (allocated == null || allocated.capacity() != d.size() * 3) ? ByteBuffer.allocateDirect(
                4 * d.size() * 3)
                .order(ByteOrder.nativeOrder())
                .asFloatBuffer() : allocated;
        for (T dd : d) {
            Vec3 v = t.apply(dd);
            f.put((float) v.x).put((float) v.y).put((float) v.z);
        }
        f.rewind();
        cloud = build3(f, d.size());
        allocated = f;
        is2d = false;
    }

    public <T> void build128d(List<T> d, Function<T, float[]> t) {
        free();