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...
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'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"...
This is a script for filling canvas' grid squares with red color. I'm looking for tips how to optimize my script to fill squares continuously, without chopping like here:   I tried to separate and merge some functions, but can't find a so...
I want to draw an arrow using the canvas tag, javascript. I've made it using the quadratic function, but I'm having problems to calculate the angle of rotation of the arrow...  Anyone have a clue on this?  Thank you...
Is there any way to dynamically draw an arrow between the two highlighted list items?  So if I hovered over "Item 2" it would do this (but a straight arrow):  Item 1            Highlight 3 Item 2-----\      Highlight 1 Item 3      ----->Hi...
Is there any way to draw a line using javascript and the canvas with "better" antialiasing, like Flash does?  I know the Math.floor(coord)+0.5 trick to get an exactly 1 pixel line when you need it, but that's not what I mean. The followin...
I'm looking for a fast algorithm that draws lines with a certain thickness. The lines don't have to be antialiased, speed is priority. Something fairly simple like this would suffice:    The use case is a Javascript game where worms leave tra...
I am making drawing editor using Fabric.js. One of the requirements is to create flexible text box component (like Goole Slides or Power Point) whose bounding box can be adjusted without compromising text size and other text controls like scale, repo...

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