Method add

src/main/java/trace/graphics/LoadPly.kt:66–104

    fun planarRotate(center: Vec3, up: Vec3, amount: Float) {
        val q = Quat().setAngleAxis(amount.toDouble(), up.normalize())

        points.forEach {
            val d = (it.at.x - center.x) * up.x + (it.at.y - center.y) * up.y + (it.at.z - center.z) * up.z;
            if (d > 0) {
                val v = q.transform(Vec3(it.at.x - center.x, it.at.y - center.y, it.at.z - center.z))
                v.x += center.x
                v.y += center.y
                v.z += center.z
                it.at %= v
            }
        }
    }


    @Throws(FileNotFoundException::class, IOException::class)
    protected fun add(filename: String) {
        reader = BufferedReader(FileReader(File(filename)), 1024 * 1024 * 10)
        while (true) {
            val m = reader!!.readLine()
            println("header :$m")
            if (m.startsWith("end_"))
                break
        }

        var num = 0
        while (reader!!.ready()) {
            val line = reader!!.readLine()
            val elements = line.split(" ".toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray()

            if (elements.size == 6) {
                val p = Point(set(elements, 0), set(elements, 3) * (1 / 255.0), null)

                points.add(p)
            } else if (elements.size == 9) {
                val p = Point(set(elements, 0), set(elements, 6) * (1 / 255.0), set(elements, 3))

                points.add(p)
            } else if (elements.size == 10) {
                val p = Point(set(elements, 0), set(elements, 6) * (1 / 255.0), set(elements, 3))

                points.add(p)
            } else if (elements.size == 7) {