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Dynamic shadow maps - article or procedure?

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Hi. I would like to add dynamic shadows to my isometric engine, but I really don''t know where to begin. I''m not sure if it would be best to use a decal as the shadow, or an actual texture map. If anybody knows of an article that describes the process of mapping shadows (I''d rather not use shadow volumes), or if you know the procedure for doing so, please let me know. My only idea at this point is to stretch the shadow corresponding to its distance from any given light source (greater distance usually means longer shadows, although this depends on the height of the light source, of course). Then I would rotate it to match the direction of the light and stretch it 50 percent along the y-axis so it fits in my isometric world. This doesn''t seem like a very efficient method, but it might be my best option at this point. Thanks for any help.

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