Posts about Konva.js, the JavaScript library adding an object model and other super powers to the HTML5 canvas lib.
A quick run through of some of the principles of working with text and breaking away from relying on textOut and Text object from the Konva HTML5 canvas library.
This is from a StackOverflow answer I made in response to a request for a way to show a route on a map with bends. In essence this is manipulation of the points array for a Konva Line object.
I've seen a few questions on The 'Net around how the HTML5 canvas fits into the DOM and whether canvas content can be styled via CSS - here's my explanation. I also mention a few libraries and why you would want to use them...
Thinking about shape-point collision detection in a case where there are many shapes on the stage, and how to improve performance. Here's my explanation of those functions and an possibly better approach.
Someone asked on the Konva discord channel how to have a shape - in this case a group - be positioned and zoomed so that the shape fills the canvas view and is centered vertically and horizontally. Here's my answer...
Coding a project that needs an undo-redo feature? Me too - here's my thinking from the end of the development on the subject based on my learnings coding a rich text editor.
I wanted to learn about animation on the canvas so I'm making a smooth spiral animation of the first 199 words of David Bowie's 'Space Oddity' using the excellent Konva canvas library and its animation feature.