planepath.kt

private fun initPlanePath() {
    planePath.reset()
    var startX = randomX()
    var startY = randomY()
    repeat(3) {
        planePath.moveTo(startX, startY)
        val controlX = randomX()
        val controlY = randomY()
        val endX = randomX()
        val endY = randomY()
        planePath.quadTo(controlX, controlY, endX, endY)
        startX = endX
        startY = endY
    }
}

//generate a random number between 0 and view width
private fun randomX() = random.nextInt(0, width).toFloat()
//generate a random number between 0 and view height
private fun randomY() = random.nextInt(0, height).toFloat()