http://techbase.kde.org/index.php?title=Projects/Edu/Step&feed=atom&action=history 2013-05-23T17:48:42Z Revision history for this page on the wiki MediaWiki 1.20.2 http://techbase.kde.org/index.php?title=Projects/Edu/Step&diff=52384&oldid=prev 2010-07-03T18:28:18Z

<p></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr style='vertical-align: top;'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 18:28, 3 July 2010</td> </tr><tr><td colspan="2" class="diff-lineno">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">==ToDo==</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">A TODO list can be found [http://websvn.kde.org/trunk/KDE/kdeedu/step/TODO?view=markup here].</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>==StepCore Library==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>==StepCore Library==</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>'''StepCore''' is the physical simulation library on which [http://userbase.kde.org/Step '''Step'''] is based. It can be used without '''Step''' for complex simulations which require coding or in other software which require physical simulation functionality. It is designed in order to be extensible, tunable and to provide accurate simulation. &#160;</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>'''StepCore''' is the physical simulation library on which [http://userbase.kde.org/Step '''Step'''] is based. It can be used without '''Step''' for complex simulations which require coding or in other software which require physical simulation functionality. It is designed in order to be extensible, tunable and to provide accurate simulation. &#160;</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del class="diffchange diffchange-inline">Look </del>at the <del class="diffchange diffchange-inline">documentation:</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">===Why was StepCore written? What's wrong with existing libraries?===</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>&#160;</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">There are several open-source (and proprietary) physical simulation libraries (most known are ODE and Bullet). They are really good for things they are designed for, but not suitable for a program such as Step because:</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>&#160;</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* Most of them are designed for games, this means quick, stable, realistic but inaccurate simulation. Step is an educational program, it is intended to show how things are in real world, so accuracy is really important.</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* They do not provide error estimation (since it requires additional resources and is useless for games), but this is important for Step. If Step can't show how things are in real world it should </ins>at <ins class="diffchange diffchange-inline">least warn </ins>the <ins class="diffchange diffchange-inline">user.</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* Most of them focus mainly on rigid body simulation, the scope of Step is wider.</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* Most of them can handle only three-dimensional simulations. Using them for two-dimensional simulations is wasting computer resources.</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* Most of them are not easily extensible, complex bodies such as massive springs are hard to implement with them.</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* The other end is scientific simulation libraries, but they are too big and complex to be used with Step.</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>&#160;</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">===What are StepCore design goals?===</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>&#160;</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* Accuracy and error estimations.</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* Support for both 2d and (in the future) 3d simulations.</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* Extensibility by adding new solver types, body types, forces.</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* Extensibility by adding new simulation types which can possibly interact with each other (for example liquid simulation using Boltzmann equation which can interract with mechanical bodies).</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>&#160;</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>&#160;</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">===Documentation===</ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://stepcore.sourceforge.net/docs/design_intro.html&#160; Introduction into '''StepCore''' design]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://stepcore.sourceforge.net/docs/design_intro.html&#160; Introduction into '''StepCore''' design]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://stepcore.sourceforge.net/docs/index.html '''StepCore''' API documentation]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://stepcore.sourceforge.net/docs/index.html '''StepCore''' API documentation]</div></td></tr> </table>

Pipesmoker http://techbase.kde.org/index.php?title=Projects/Edu/Step&diff=52383&oldid=prev 2010-07-03T18:24:33Z

<p>Created page with &#039;==StepCore Library== &#039;&#039;&#039;StepCore&#039;&#039;&#039; is the physical simulation library on which [http://userbase.kde.org/Step &#039;&#039;&#039;Step&#039;&#039;&#039;] is based. It can be used without &#039;&#039;&#039;Step&#039;&#039;&#039; for complex...&#039;</p> <p><b>New page</b></p><div>==StepCore Library==<br /> <br /> '''StepCore''' is the physical simulation library on which [http://userbase.kde.org/Step '''Step'''] is based. It can be used without '''Step''' for complex simulations which require coding or in other software which require physical simulation functionality. It is designed in order to be extensible, tunable and to provide accurate simulation. <br /> <br /> Look at the documentation:<br /> <br /> * [http://stepcore.sourceforge.net/docs/design_intro.html Introduction into '''StepCore''' design]<br /> * [http://stepcore.sourceforge.net/docs/index.html '''StepCore''' API documentation]</div>

Pipesmoker