Month: February 2015
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API – what’s out there?
The http://www.programmableweb.com/ is s vast collection of APIs for web developers. It is a fine place to start if you need some API service for your website or app.
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The image registration point
On at JavaScript canvas the registration point is the top left corner. So in hit detection you have to calculate the x-position, the image width and height. In layout you should be able to figure out where to plage the images, and illustrations. Y = “up / down” X = “left / right” ( I…
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The X and the Y axis
On the HTML canvas the top left corner is x = 0 and y = 0. The y-axis is “up & down”. The x-axis is “left & right”.
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Canvas Animation
With a canvas you can animate your page. You can use images or draw geometric figures on the canvas. Here are some tutorials for canvas animation. Basic Canvas drawing. Canvas animation – see the video below. JavaScript and SVGÂ (Peter Collinridge). Parallax Effect ( Multilayer animation ) The following presentation is not strictly JavaScript but a…