<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt">Hi Daniel<br>Very tiny indeed.<br>We spoke before , about 4 years ago, when I translated (poorly) the SDL_Intro document to portuguese.<br><br>BZK is not using Z-Buffer as it may be not suitable for slow devices with big screens (Nokia 770);<br>Neither Im using BSP , but a higly modified painter's algorithm. Its not something easy to describe , as Im still working it as my gradutation thesis.<br>Well..to best sumarize it: its like a portal rendering using a K-d Tree. Why not Z-Buffer? some plataforms like Symbian OS dont give me acess to a large buffer like the one needed by Z-Buffer , but only to cointainers. (well, that changed recently...but BZK is older than that and the devices that support this are the high end only)<br><br>This TinyGL maybe be a good solution for BZK on the XO indeed. although I dont
really like much OpenGL and the BZK render is only half compatible...maybe we can work on this...<br><br>About the floating point. Im about to make it only optional (activated on compile time), as the new nokia device (N800) has a good FPU too.<br><br> []s<br><br>Daniel<br><br>-----------------------------------------------------------------<br>Wow, that's surely a tiny world! A guy with almost the same name as<br>mine, that lives in the same country as me, that codes in C++ and do 3D<br>programming!<br><br>I only sent a message to the devel list, so I'll take the opportunity to<br>announce here too: I'm adapting a software renderer implementation of<br>OpenGL (TinyGL, by Fabrice Bellard), suitable to be run on the XO.<br>Currently it runs the gears demo in fullscreen (actually rendered to a<br>256x256 framebuffer) at 50 fps.<br><br>I hope to be able to execute my robotics simulation framework in the XO,<br>but there is still a lot of work to be done. You can
take a look at what<br>I've already accomplished at:<br><br><a target="_blank" href="http://www.basso.inf.br/phi/">http://www.basso.inf.br/phi/</a> (check the gallery, it's old but nice :)<br><a target="_blank" href="http://www.lec.ufrgs.br/%7Edmbasso/phi/doku.php">http://www.lec.ufrgs.br/~dmbasso/phi/doku.php</a> (last stable version)<br><br>About BZK: does it use BSP for occlusion culling? TinyGL uses a<br>z-buffer, but I suspect a BSP-tree would perform better. The Geode's<br>floating point is very fast, so BZK's fixed-point is not really an<br>advantage on the XO.<br><br>[]'s<br><br>Daniel<br></div><br>
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