4 <title>Sixth 3D engine demos</title>
5 <!-- 2018-06-24 Sun 02:37 -->
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198 <div class="row"><div class="col-md-9"><h1 class="title">Sixth 3D engine demos</h1>
200 <div id="outline-container-sec-1" class="outline-2">
201 <h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
202 <div class="outline-text-2" id="text-1">
204 <li>This is a subproject of <a href="http://www3.svjatoslav.eu/projects/sixth-3d/">Sixth 3D</a> which in turn is a subproject of
205 <a href="http://www3.svjatoslav.eu/projects/sixth/">Sixth</a>.
208 <li>This program is free software: you can redistribute it and/or modify
209 it under the terms of the <a href="https://www.gnu.org/licenses/lgpl.html">GNU Lesser General Public License</a> as
210 published by the Free Software Foundation, either version 3 of the
211 License, or (at your option) any later version.
216 <li>Svjatoslav Agejenko
218 <li>Homepage: <a href="http://svjatoslav.eu">http://svjatoslav.eu</a>
220 <li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">mailto://svjatoslav@svjatoslav.eu</a>
225 <li><a href="http://www.svjatoslav.eu/projects/">Other software projects hosted at svjatoslav.eu</a>
230 <div id="outline-container-sec-1-1" class="outline-3">
231 <h3 id="sec-1-1"><span class="section-number-3">1.1</span> Source code</h3>
232 <div class="outline-text-3" id="text-1-1">
234 <li><a href="http://www2.svjatoslav.eu/gitweb/?p=sixth-3d-demos.git;a=snapshot;h=HEAD;sf=tgz">Download latest snapshot in TAR GZ format</a>
237 <li><a href="http://www2.svjatoslav.eu/gitweb/?p=sixth-3d-demos.git;a=summary">Browse Git repository online</a>
240 <li>Clone Git repository using command:
241 <pre class="example">
242 git clone http://www2.svjatoslav.eu/git/sixth-3d-demos.git
250 <div id="outline-container-sec-2" class="outline-2">
251 <h2 id="sec-2"><span class="section-number-2">2</span> Overview</h2>
252 <div class="outline-text-2" id="text-2">
254 Goal of this project is to show off capabilities and API usage of
255 <a href="http://www3.svjatoslav.eu/projects/sixth-3d/">Sixth 3D</a> engine.
259 All sample scenes below are rendered at interactive framerates.
263 <div id="outline-container-sec-3" class="outline-2">
264 <h2 id="sec-3"><span class="section-number-2">3</span> Navigating in space</h2>
265 <div class="outline-text-2" id="text-3">
266 <table class="table table-striped table-bordered table-hover table-condensed">
276 <th scope="col" class="text-left">key</th>
277 <th scope="col" class="text-left">result</th>
282 <td class="text-left">cursor keys</td>
283 <td class="text-left">move: left, right, forward, backward</td>
287 <td class="text-left">mouse scroll wheel</td>
288 <td class="text-left">move: up, down</td>
292 <td class="text-left">dragging with mouse</td>
293 <td class="text-left">look around</td>
300 <div id="outline-container-sec-4" class="outline-2">
301 <h2 id="sec-4"><span class="section-number-2">4</span> Samples</h2>
302 <div class="outline-text-2" id="text-4">
303 </div><div id="outline-container-sec-4-1" class="outline-3">
304 <h3 id="sec-4-1"><span class="section-number-3">4.1</span> Raytracing through voxels</h3>
305 <div class="outline-text-3" id="text-4-1">
308 <p><img src="screenshots/raytracing fractal in voxel polygon hybrid scene.png" class="img-responsive" alt="raytracing fractal in voxel polygon hybrid scene.png">
313 Test scene that is generated simultaneously using:
316 <li>conventional polygons
318 <li>for realtime navigation, and
324 <li>for on-demand raytracing
331 Instead of storing voxels in dumb [X * Y * Z] array, dynamically
332 partitioned <a href="https://en.wikipedia.org/wiki/Octree">octree</a> is used to compress data. Press "r" key anywhere in
333 the scene to raytrace current view through compressed voxel
339 <div id="outline-container-sec-4-2" class="outline-3">
340 <h3 id="sec-4-2"><span class="section-number-3">4.2</span> Conway's Game of Life</h3>
341 <div class="outline-text-3" id="text-4-2">
343 The Game of Life, also known simply as Life, is a cellular automaton
344 devised by the British mathematician John Horton Conway in 1970.
348 <li><a href="https://en.wikipedia.org/wiki/Conway's_Game_of_Life">https://en.wikipedia.org/wiki/Conway's_Game_of_Life</a>
352 <li>2 cell states: alive / dead
354 <li>Each cell sees 8 neighboring cells.
356 <li>If alive cell neighbors count is 2 or 3, then cell survives,
359 <li>Dead cell becomes alive if neighbors count is exactly 3.
369 <p><img src="screenshots/life.png" class="img-responsive" alt="life.png">
374 Current application projects 2D game grid/matrix onto three
375 dimensional space. Extra dimension (height) is used to visualize
376 history (previous iterations) using glowing dots suspended in space.
382 <table class="table table-striped table-bordered table-hover table-condensed">
392 <th scope="col" class="text-left">key</th>
393 <th scope="col" class="text-left">result</th>
398 <td class="text-left">mouse click on the cell (cell)</td>
399 <td class="text-left">toggles cell state</td>
403 <td class="text-left"><space></td>
404 <td class="text-left">next iteration</td>
408 <td class="text-left">ENTER</td>
409 <td class="text-left">next iteeration with the history</td>
413 <td class="text-left">"c"</td>
414 <td class="text-left">clear the matrix</td>
421 <div id="outline-container-sec-4-3" class="outline-3">
422 <h3 id="sec-4-3"><span class="section-number-3">4.3</span> Text editors</h3>
423 <div class="outline-text-3" id="text-4-3">
426 <p><img src="screenshots/text editors.png" class="img-responsive" alt="text editors.png">
431 Initial test for creating user interfaces in 3D and:
434 <li>window focus handling
436 <li>picking objecs using mouse
438 <li>redirecting keyboard input to focused window
444 Window focus acts like a stack.
448 When window is clicked with the mouse, previously focused window (if
449 any) is pushed to the focus stack and new window receives focus. Red
450 frame appears around the window to indicate this.
454 When ESC key is pressed, window focus is returned to previous window
459 When any window is focused, all keyboard input is redirected to that
460 window, including cursor keys. To be able to navigate around the world
461 again, window must be unfocused first using ESC key.
468 <li>Improve focus handling:
470 <li>Perhaps add shortcut to navigate world without exiting entire
473 <li>Possibility to retain and reuse recently focused elements.
475 <li>Store user location in the world and view direction with the
476 focused window. So that when returning focus to far away object,
477 user is redirected also to proper location in the world.
481 <li>Possibility to store recently visited locations in the world and
489 <div id="outline-container-sec-4-4" class="outline-3">
490 <h3 id="sec-4-4"><span class="section-number-3">4.4</span> Mathematical formulas</h3>
491 <div class="outline-text-3" id="text-4-4">
494 <p><img src="screenshots/mathematical formulas.png" class="img-responsive" alt="mathematical formulas.png">
499 <li>TODO: instead of projecting 2D visualizations onto 3D space,
500 visualize some formula using all 3 dimensions avaliable.
505 <div id="outline-container-sec-4-5" class="outline-3">
506 <h3 id="sec-4-5"><span class="section-number-3">4.5</span> Sinus heightmaps and sphere</h3>
507 <div class="outline-text-3" id="text-4-5">
510 <p><img src="screenshots/sinus heightmaps and sphere.png" class="img-responsive" alt="sinus heightmaps and sphere.png">
515 Simple test scene. Easy to implement and looks nice.
520 </div><div class="col-md-3"><nav id="table-of-contents">
521 <div id="text-table-of-contents" class="bs-docs-sidebar">
523 <li><a href="#sec-1">1. General</a>
525 <li><a href="#sec-1-1">1.1. Source code</a></li>
528 <li><a href="#sec-2">2. Overview</a></li>
529 <li><a href="#sec-3">3. Navigating in space</a></li>
530 <li><a href="#sec-4">4. Samples</a>
532 <li><a href="#sec-4-1">4.1. Raytracing through voxels</a></li>
533 <li><a href="#sec-4-2">4.2. Conway's Game of Life</a></li>
534 <li><a href="#sec-4-3">4.3. Text editors</a></li>
535 <li><a href="#sec-4-4">4.4. Mathematical formulas</a></li>
536 <li><a href="#sec-4-5">4.5. Sinus heightmaps and sphere</a></li>
543 <footer id="postamble" class="">
544 <div><p class="author">Author: Svjatoslav Agejenko</p>
545 <p class="date">Created: 2018-06-24 Sun 02:37</p>
546 <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>