I'm using the Google Maps API and have added markers. Now I want to add a 10 mile radius around each marker, meaning a circle that behaves appropriately while zooming. I have no idea how to do that and it seems it's not something common.  I f...
So far none of the threads here on smooth lines are correct.  how to draw smooth curve through N points using javascript HTML5 canvas?  Smooth user drawn lines in canvas  Both result in jagged lines. By smooth I mean using the x,y points as control p...
I'm writing an HTML5 canvas drawing app, and I need to be able to tell whether or not the left mouse button is pressed down during a mousemove event. On Chrome, this works:  if (event.which == 1) { <do stuff> }   But in FireFox, event.which...
Is there a Javascript library which has built-in features for quickly creating a Paint-like web application using the canvas element?  EDIT: So, far, I have found Javascript libraries that allow easy animation of canvas elements -- such as Raphael JS...
I have 3 x,y points that I am trying to use to draw a right trangle.  So I am calculating the angles of the triangle after calculating side lengths.  After I have gotten the hypotenuse's length, I want to rotate the hypotenuse so that it complete...
I am trying to create a background for my website that uses canvases to draw stuff, get the data URL of it and set it as the background-image property of an element. The method works, but I can't find a good way to draw a cloud on the canvas. Oth...
I am creating a bar chart like so:  var ctxForecastChart = $("#forecastLineChart").get(0).getContext("2d"); var forecastChartData = {     labels: [         "Total Sales"     ],     datasets: [     {         label: "8/28/20...
i need to draw a line between two  tags or  tags.    Example: http://caitriona.github.io/connect-the-dots/    I need to do something like this but not like in this script, in an order but randomly. You can click on "P1" and then on "P2...
I'm currently thinking about using fabric.js for an on-line handwriting recognition system. For such a system, I would need to send the drawn lines as a list of lines, where each line is a list of points.  So if the user has drawn an "x"...
I trying to do an anti-aliasing drawing function in canvas. Thanks to all the super answers on this site about canvas and aliasing.   here's the demo: https://jsfiddle.net/garciaVvV/eu34c8sy/12/  here's the line js:   function lineXY(mouseX,...

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