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POHow do I access separate points/sections on a single image in html/javascript?
 

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  1. POHow do I access separate points/sections on a single image in html/javascript?
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    <p>I am learning to develop mobile applications, quite in the initial phase.</p> <p>This query is not related to mobile but more to html/css/js.(for </p> <p>I intend to make a simple game, where a picture is seen, a few options are available and the user can drag and drop these options onto the image. eg. There is an image of a plant > options are #leaf #stem #flower #bud The user must drag and drop the correct option to the correct place on the image to get points. i.e Drag the #leaf option onto the leaf of the plant.</p> <p>Now my problem is the image, the separation of these points, I can't figure out how to do it.</p> <p><strong>Query in short: How do I access separate points/sections on a single image in html/js for above purpose?</strong></p> <p><strong>Query (longer version)</strong> I did a little search and realised I can slice the image and recreate it using multiple images, I tried this, it sort of works but it has a a lot of drawbacks:</p> <p>1)More images mean more space, combined size of the split images was about 1.5x the original image(this is just splitting it into 4 images)</p> <p>2)For a complex picture, the number of images to slice into is large and hard to manage in css(n00b==me) as they don't just need to be split into a simple X*Y grid but a much more complex split depending on the object in the image.(realised when I was trying to do a simple cell structure img)</p> <p>3)More images also means more http requests(in case the app is WebView based) which will increase loading time.</p> <p>It just seemed liked too much of a hassle, there must be a better way.</p> <p>Then I saw css sprites , I dont need to combine my images like sprites are intended for, rather the reverse. Just access parts of my pre-existing image, as separate objects.I haven't tried this(working on it) and and I haven't seen this being done either, or maybe its being done and I'm not seeing.</p> <p>Please help guys, my problem is quite simple(I think) , I think I'm just not getting the correct google search terms.</p> <p>If anybody has any ideas,links, resources and also any clarifications as I may not have put up my problem as clearly as I'd like to, please do reply.</p> <p>regards, Rahul Agarwal</p>
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    1. USRahul Agarwal
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