class MyRenderer: GLSurfaceView.Renderer {
    private var kat = 0f
    override fun onDrawFrame(gl: GL10?) {
        var points = mutableListOf<Float>()
        var x = 0.0f

        for(i in 1..255)
        {
            var k = i.toFloat()

            points.add(sin(x) * 0.1f)
            points.add(cos(x) * 0.1f)
            points.add(-1.0f)

            x = ((k / 255) * PI.toFloat() * 2)
        }

        val bufor = ByteBuffer.allocateDirect(256 * 3 * 4)
        bufor.order(ByteOrder.nativeOrder())

        val bufor_wierzcholkow = bufor.asFloatBuffer()
        bufor_wierzcholkow.put(points.toFloatArray())
        bufor_wierzcholkow.position(0)

        gl?.glClear(GL10.GL_COLOR_BUFFER_BIT or GL10.GL_DEPTH_BUFFER_BIT)
        gl?.glColor4f(0.0f, 0.0f, 1.0f, 1.0f)
        gl?.glLoadIdentity()
        gl?.glEnableClientState(GL10.GL_VERTEX_ARRAY)
        gl?.glVertexPointer(3, GL10.GL_FLOAT, 0, bufor_wierzcholkow)
        gl?.glDrawArrays(GL10.GL_TRIANGLES, 0, 256)
        gl?.glDisableClientState(GL10.GL_VERTEX_ARRAY)