grelf

How to make a hazy horizon

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As some have already pointed out in this forum there is a problem with scenes stretching ahead with a sudden cut-off at a horizon. Objects just beyond the horizon suddenly pop completely into view on the slightest forward movement.

I have addressed this in my program The Forest ( https://www.myforest.uk ) by making the scene hazy (or foggy) towards the horizon, if the user switches this effect on via a check box on the page. A couple of example scenes are attached here.

I have written a detailed description of how I programmed it ( https://www.grelf.net/forestdesign.html#fog ). My code is plain HTML5/JavaScript using no framework and only the standard 2D graphics context because I want my program to run on as many platforms as possible. So my documentation explains how to process images in that environment and indeed how to copy an object of type Image complete with its pixel data, which is not entirely obvious or straightforward.

I hope this may be useful to others.

 

FoggyAcrossLake.jpg

FoggyHillside.jpg

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