Konva – Rotating a rectangle to cover another

In an earlier post I covered how to rotate a shape around any point on the canvas without using offset. In this post I’ll look at how to rotate and scale a rectangle so that it entirely covers the space it occupied before rotation. This is useful if you ever have to rotate an imageContinue reading “Konva – Rotating a rectangle to cover another”

Konva – HTML5 canvas synchronisation, part 1

Interactive whiteboard apps seem to be a popular use-case vector for the HTML5 canvas. I’m a fan of the Konva JavaScript 2d canvas library so I wondered what it would take to synchronise canvases. Design thoughts My end goal is a meeting or classroom-style whiteboard where there could be multiple users sharing and co-operating onContinue reading “Konva – HTML5 canvas synchronisation, part 1”