isCollinear

fun isCollinear(p1: Point, p2: Point, p3: Point): Boolean
fun isCollinear(p1x: Double, p1y: Double, p2x: Double, p2y: Double, p3x: Double, p3y: Double): Boolean
fun isCollinear(xa: Float, ya: Float, x: Float, y: Float, xb: Float, yb: Float): Boolean
fun isCollinear(xa: Int, ya: Int, x: Int, y: Int, xb: Int, yb: Int): Boolean