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POOptimal way to set pixel data?
 

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    <p>I'm working on a "falling sand" style of game.</p> <p>I've tried many ways of drawing the sand to the screen, however, each way seems to produce some problem in one form or another.</p> <p>List of things I've worked through:</p> <ol> <li><p>Drawing each pixel individually, one at a time from a pixel sized texture. Problem: Slowed down after about 100,000 pixels were changing per update.</p></li> <li><p>Drawing each pixel to one big texture2d, drawing the texture2d, then clearing the data. Problems: using texture.SetPixel() is very slow, and even with disposing the old texture, it would cause a small memory leak (about 30kb per second, which added up quick), even after calling dispose on the object. I simply could not figure out how to stop it. Overall, however, this has been the best method (so far). If there is a way to stop that leak, I'd like to hear it.</p></li> <li><p>Using Lockbits from bitmap. This worked wonderfully from the bitmaps perspective, but unfortunately, I still had to convert the bitmap back to a texture2d, which would cause the frame rate to drop to less than one. So, this has the potential to work very well, if I can find a way to draw the bitmap in xna without converting it (or something).</p></li> <li><p>Setting each pixel into a texture2d with set pixel, by replacing the 'old' position of pixels with transparent pixels, then setting the new position with the proper color. This doubled the number of pixel sets necessary to finish the job, and was much much slower than using number 2.</p></li> </ol> <p>So, my question is, any better ideas? Or ideas on how to fix styles 2 or 3?</p>
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    1. COIn response to #1: Did you try batching your draws, rather than one at a time?
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    2. CONo I don't believe so, d'you have a link or explanation handy? (If you mean drawing similar textures together, yes that did help, but it wasn't great.)
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    3. COWell, an easy thing to try to begin with is simply use a `SpriteBatch`, and `Draw` each pixel with a destination rectangle of size `1, 1`, and sample from a very small texture with the color you want. If that's still slow you can do all this manually and not use any textures whatsoever (should speed it up a little). This is potentially a lot of polygons though, but it's worth a shot.
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