4 <title>Sixth 3D engine demos</title>
5 <!-- 2017-07-15 Sat 11:04 -->
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198 <div class="row"><div class="col-md-9"><h1 class="title">Sixth 3D engine demos</h1>
201 <li>This is a subproject of <a href="http://www2.svjatoslav.eu/gitbrowse/sixth-3d/doc/index.html">Sixth 3D</a> which in turn is a subproject of
202 <a href="http://www2.svjatoslav.eu/gitbrowse/sixth/doc/index.html">Sixth</a>.
204 <li><a href="http://www2.svjatoslav.eu/gitweb/?p=sixth-3d-demos.git;a=snapshot;h=HEAD;sf=tgz">download latest snapshot</a>
207 <li>This program is free software; you can redistribute it and/or modify it under
208 the terms of version 3 of the <a href="https://www.gnu.org/licenses/lgpl.html">GNU Lesser General Public License</a> or later as
209 published by the Free Software Foundation.
214 <li>Svjatoslav Agejenko
216 <li>Homepage: <a href="http://svjatoslav.eu">http://svjatoslav.eu</a>
218 <li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">mailto://svjatoslav@svjatoslav.eu</a>
223 <li><a href="http://www.svjatoslav.eu/programs.jsp">other applications hosted at svjatoslav.eu</a>
228 <div id="outline-container-sec-1" class="outline-2">
229 <h2 id="sec-1"><span class="section-number-2">1</span> Overview</h2>
230 <div class="outline-text-2" id="text-1">
232 Goal of this project is to show off capabilities and API usage of
233 <a href="http://www2.svjatoslav.eu/gitbrowse/sixth-3d/doc/index.html">Sixth 3D</a> engine.
237 All sample scenes below are rendered at interactive framerates.
241 <div id="outline-container-sec-2" class="outline-2">
242 <h2 id="sec-2"><span class="section-number-2">2</span> Navigating in space</h2>
243 <div class="outline-text-2" id="text-2">
244 <table class="table table-striped table-bordered table-hover table-condensed">
254 <th scope="col" class="text-left">key</th>
255 <th scope="col" class="text-left">result</th>
260 <td class="text-left">cursor keys</td>
261 <td class="text-left">move: left, right, forward, backward</td>
265 <td class="text-left">mouse scroll wheel</td>
266 <td class="text-left">move: up, down</td>
270 <td class="text-left">dragging with mouse</td>
271 <td class="text-left">look around</td>
278 <div id="outline-container-sec-3" class="outline-2">
279 <h2 id="sec-3"><span class="section-number-2">3</span> Samples</h2>
280 <div class="outline-text-2" id="text-3">
281 </div><div id="outline-container-sec-3-1" class="outline-3">
282 <h3 id="sec-3-1"><span class="section-number-3">3.1</span> Raytracing through voxels</h3>
283 <div class="outline-text-3" id="text-3-1">
286 <p><img src="screenshots/raytracing fractal in voxel polygon hybrid scene.png" class="img-responsive" alt="raytracing fractal in voxel polygon hybrid scene.png">
291 Test scene that is generated simultaneously using:
294 <li>conventional polygons
296 <li>for realtime navigation, and
302 <li>for on-demand raytracing
309 Instead of storing voxels in dumb [X * Y * Z] array, dynamically
310 partitioned <a href="https://en.wikipedia.org/wiki/Octree">octree</a> is used to compress data. Press "r" key anywhere in
311 the scene to raytrace current view through compressed voxel
317 <div id="outline-container-sec-3-2" class="outline-3">
318 <h3 id="sec-3-2"><span class="section-number-3">3.2</span> Conway's Game of Life</h3>
319 <div class="outline-text-3" id="text-3-2">
321 The Game of Life, also known simply as Life, is a cellular automaton
322 devised by the British mathematician John Horton Conway in 1970.
326 <li><a href="https://en.wikipedia.org/wiki/Conway's_Game_of_Life">https://en.wikipedia.org/wiki/Conway's_Game_of_Life</a>
330 <li>2 cell states: alive / dead
332 <li>Each cell sees 8 neighboring cells.
334 <li>If alive cell neighbors count is 2 or 3, then cell survives,
337 <li>Dead cell becomes alive if neighbors count is exactly 3.
347 <p><img src="screenshots/life.png" class="img-responsive" alt="life.png">
352 Current application projects 2D game grid/matrix onto three
353 dimensional space. Extra dimension (height) is used to visualize
354 history (previous iterations) using glowing dots suspended in space.
360 <table class="table table-striped table-bordered table-hover table-condensed">
370 <th scope="col" class="text-left">key</th>
371 <th scope="col" class="text-left">result</th>
376 <td class="text-left">mouse click on the cell (cell)</td>
377 <td class="text-left">toggles cell state</td>
381 <td class="text-left"><space></td>
382 <td class="text-left">next iteration</td>
386 <td class="text-left">ENTER</td>
387 <td class="text-left">next iteeration with the history</td>
391 <td class="text-left">"c"</td>
392 <td class="text-left">clear the matrix</td>
399 <div id="outline-container-sec-3-3" class="outline-3">
400 <h3 id="sec-3-3"><span class="section-number-3">3.3</span> Text editors</h3>
401 <div class="outline-text-3" id="text-3-3">
404 <p><img src="screenshots/text editors.png" class="img-responsive" alt="text editors.png">
409 Initial test for creating user interfaces in 3D and:
412 <li>window focus handling
414 <li>picking objecs using mouse
416 <li>redirecting keyboard input to focused window
422 Window focus acts like a stack.
426 When window is clicked with the mouse, previously focused window (if
427 any) is pushed to the focus stack and new window receives focus. Red
428 frame appears around the window to indicate this.
432 When ESC key is pressed, window focus is returned to previous window
437 When any window is focused, all keyboard input is redirected to that
438 window, including cursor keys. To be able to navigate around the world
439 again, window must be unfocused first using ESC key.
446 <li>Improve focus handling:
448 <li>Perhaps add shortcut to navigate world without exiting entire
451 <li>Possibility to retain and reuse recently focused elements.
453 <li>Store user location in the world and view direction with the
454 focused window. So that when returning focus to far away object,
455 user is redirected also to proper location in the world.
459 <li>Possibility to store recently visited locations in the world and
467 <div id="outline-container-sec-3-4" class="outline-3">
468 <h3 id="sec-3-4"><span class="section-number-3">3.4</span> Mathematical formulas</h3>
469 <div class="outline-text-3" id="text-3-4">
472 <p><img src="screenshots/mathematical formulas.png" class="img-responsive" alt="mathematical formulas.png">
477 <li>TODO: instead of projecting 2D visualizations onto 3D space,
478 visualize some formula using all 3 dimensions avaliable.
483 <div id="outline-container-sec-3-5" class="outline-3">
484 <h3 id="sec-3-5"><span class="section-number-3">3.5</span> Sinus heightmaps and sphere</h3>
485 <div class="outline-text-3" id="text-3-5">
488 <p><img src="screenshots/sinus heightmaps and sphere.png" class="img-responsive" alt="sinus heightmaps and sphere.png">
493 Simple test scene. Easy to implement and looks nice.
498 </div><div class="col-md-3"><nav id="table-of-contents">
499 <div id="text-table-of-contents" class="bs-docs-sidebar">
501 <li><a href="#sec-1">1. Overview</a></li>
502 <li><a href="#sec-2">2. Navigating in space</a></li>
503 <li><a href="#sec-3">3. Samples</a>
505 <li><a href="#sec-3-1">3.1. Raytracing through voxels</a></li>
506 <li><a href="#sec-3-2">3.2. Conway's Game of Life</a></li>
507 <li><a href="#sec-3-3">3.3. Text editors</a></li>
508 <li><a href="#sec-3-4">3.4. Mathematical formulas</a></li>
509 <li><a href="#sec-3-5">3.5. Sinus heightmaps and sphere</a></li>
516 <footer id="postamble" class="">
517 <div><p class="author">Author: Svjatoslav Agejenko</p>
518 <p class="date">Created: 2017-07-15 Sat 11:04</p>
519 <p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 25.1.1 (<a href="http://orgmode.org">Org-mode</a> 8.2.10)</p>