This week's book giveaways are in the Cloud/Virtualization and Go forums. We're giving away four copies each of Cloud Native Transformation: Practical Patterns for Innovation and The Go Workshop and have the authors on-line! See this thread and this one for details.
(startX,startY) is the starting point coordinate,
(endX,endY) is the ending point coordinate,
and (bezierX,bezierY) is the control point which governs the curvature of the curve,
think in this manner, if this point is farther away, then the curve is more steep..
if this point is closer then the curve is less steep.