4 <title>Sixth 3D engine demos</title>
5 <!-- 2020-01-29 K 21:40 -->
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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="https://www3.svjatoslav.eu/projects/sixth-3d/">Sixth 3D</a>:
206 <li>which in turn is a subproject of parent project <a href="https://www3.svjatoslav.eu/projects/sixth/">Sixth</a>.
211 <li>This program is free software: you can redistribute it and/or modify
212 it under the terms of the <a href="https://www.gnu.org/licenses/lgpl.html">GNU Lesser General Public License</a> as
213 published by the Free Software Foundation, either version 3 of the
214 License, or (at your option) any later version.
219 <li>Svjatoslav Agejenko
221 <li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
223 <li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">mailto://svjatoslav@svjatoslav.eu</a>
228 <li><a href="https://www.svjatoslav.eu/projects/">Other software projects hosted at svjatoslav.eu</a>
233 <div id="outline-container-sec-1-1" class="outline-3">
234 <h3 id="sec-1-1"><span class="section-number-3">1.1</span> Source code</h3>
235 <div class="outline-text-3" id="text-1-1">
237 <li><a href="https://www2.svjatoslav.eu/gitweb/?p=sixth-3d-demos.git;a=snapshot;h=HEAD;sf=tgz">Download latest snapshot in TAR GZ format</a>
240 <li><a href="https://www2.svjatoslav.eu/gitweb/?p=sixth-3d-demos.git;a=summary">Browse Git repository online</a>
243 <li>Clone Git repository using command:
244 <pre class="example">
245 git clone https://www2.svjatoslav.eu/git/sixth-3d-demos.git
254 <div id="outline-container-sec-2" class="outline-2">
255 <h2 id="sec-2"><span class="section-number-2">2</span> Overview</h2>
256 <div class="outline-text-2" id="text-2">
258 Goal of this project is to show off capabilities and API usage of
259 <a href="https://www3.svjatoslav.eu/projects/sixth-3d/">Sixth 3D</a> engine.
263 All sample scenes below are rendered at interactive framerates.
267 <div id="outline-container-sec-3" class="outline-2">
268 <h2 id="sec-3"><span class="section-number-2">3</span> Navigating in space</h2>
269 <div class="outline-text-2" id="text-3">
270 <table class="table table-striped table-bordered table-hover table-condensed">
280 <th scope="col" class="text-left">key</th>
281 <th scope="col" class="text-left">result</th>
286 <td class="text-left">cursor keys</td>
287 <td class="text-left">move: left, right, forward, backward</td>
291 <td class="text-left">mouse scroll wheel</td>
292 <td class="text-left">move: up, down</td>
296 <td class="text-left">dragging with mouse</td>
297 <td class="text-left">look around</td>
304 <div id="outline-container-sec-4" class="outline-2">
305 <h2 id="sec-4"><span class="section-number-2">4</span> Example applications in this repository</h2>
306 <div class="outline-text-2" id="text-4">
307 </div><div id="outline-container-sec-4-1" class="outline-3">
308 <h3 id="sec-4-1"><span class="section-number-3">4.1</span> Raytracing through voxels</h3>
309 <div class="outline-text-3" id="text-4-1">
312 <p><img src="screenshots/raytracing fractal in voxel polygon hybrid scene.png" class="img-responsive" alt="raytracing fractal in voxel polygon hybrid scene.png">
317 Test scene that is generated simultaneously using:
320 <li>conventional polygons
322 <li>for realtime navigation, and
328 <li>for on-demand raytracing
335 Instead of storing voxels in dumb [X * Y * Z] array, dynamically
336 partitioned <a href="https://en.wikipedia.org/wiki/Octree">octree</a> is used to compress data. Press "r" key anywhere in
337 the scene to raytrace current view through compressed voxel
343 <div id="outline-container-sec-4-2" class="outline-3">
344 <h3 id="sec-4-2"><span class="section-number-3">4.2</span> Conway's Game of Life</h3>
345 <div class="outline-text-3" id="text-4-2">
347 The Game of Life, also known simply as Life, is a cellular automaton
348 devised by the British mathematician John Horton Conway in 1970.
352 <li><a href="https://en.wikipedia.org/wiki/Conway's_Game_of_Life">https://en.wikipedia.org/wiki/Conway's_Game_of_Life</a>
356 <li>2 cell states: alive / dead
358 <li>Each cell sees 8 neighboring cells.
360 <li>If alive cell neighbors count is 2 or 3, then cell survives,
363 <li>Dead cell becomes alive if neighbors count is exactly 3.
373 <p><img src="screenshots/life.png" class="img-responsive" alt="life.png">
378 Current application projects 2D game grid/matrix onto three
379 dimensional space. Extra dimension (height) is used to visualize
380 history (previous iterations) using glowing dots suspended in space.
386 <table class="table table-striped table-bordered table-hover table-condensed">
396 <th scope="col" class="text-left">key</th>
397 <th scope="col" class="text-left">result</th>
402 <td class="text-left">mouse click on the cell (cell)</td>
403 <td class="text-left">toggles cell state</td>
407 <td class="text-left"><space></td>
408 <td class="text-left">next iteration</td>
412 <td class="text-left">ENTER</td>
413 <td class="text-left">next iteeration with the history</td>
417 <td class="text-left">"c"</td>
418 <td class="text-left">clear the matrix</td>
425 <div id="outline-container-sec-4-3" class="outline-3">
426 <h3 id="sec-4-3"><span class="section-number-3">4.3</span> Text editors</h3>
427 <div class="outline-text-3" id="text-4-3">
430 <p><img src="screenshots/text editors.png" class="img-responsive" alt="text editors.png">
435 Initial test for creating user interfaces in 3D and:
438 <li>window focus handling
440 <li>picking objecs using mouse
442 <li>redirecting keyboard input to focused window
448 Window focus acts like a stack.
452 When window is clicked with the mouse, previously focused window (if
453 any) is pushed to the focus stack and new window receives focus. Red
454 frame appears around the window to indicate this.
458 When ESC key is pressed, window focus is returned to previous window
463 When any window is focused, all keyboard input is redirected to that
464 window, including cursor keys. To be able to navigate around the world
465 again, window must be unfocused first using ESC key.
472 <li>Improve focus handling:
474 <li>Perhaps add shortcut to navigate world without exiting entire
477 <li>Possibility to retain and reuse recently focused elements.
479 <li>Store user location in the world and view direction with the
480 focused window. So that when returning focus to far away object,
481 user is redirected also to proper location in the world.
485 <li>Possibility to store recently visited locations in the world and
493 <div id="outline-container-sec-4-4" class="outline-3">
494 <h3 id="sec-4-4"><span class="section-number-3">4.4</span> Mathematical formulas</h3>
495 <div class="outline-text-3" id="text-4-4">
498 <p><img src="screenshots/mathematical formulas.png" class="img-responsive" alt="mathematical formulas.png">
503 <li>TODO: instead of projecting 2D visualizations onto 3D space,
504 visualize some formula using all 3 dimensions avaliable.
509 <div id="outline-container-sec-4-5" class="outline-3">
510 <h3 id="sec-4-5"><span class="section-number-3">4.5</span> Sinus heightmaps and sphere</h3>
511 <div class="outline-text-3" id="text-4-5">
514 <p><img src="screenshots/sinus heightmaps and sphere.png" class="img-responsive" alt="sinus heightmaps and sphere.png">
519 Simple test scene. Easy to implement and looks nice.
524 </div><div class="col-md-3"><nav id="table-of-contents">
525 <div id="text-table-of-contents" class="bs-docs-sidebar">
527 <li><a href="#sec-1">1. General</a>
529 <li><a href="#sec-1-1">1.1. Source code</a></li>
532 <li><a href="#sec-2">2. Overview</a></li>
533 <li><a href="#sec-3">3. Navigating in space</a></li>
534 <li><a href="#sec-4">4. Example applications in this repository</a>
536 <li><a href="#sec-4-1">4.1. Raytracing through voxels</a></li>
537 <li><a href="#sec-4-2">4.2. Conway's Game of Life</a></li>
538 <li><a href="#sec-4-3">4.3. Text editors</a></li>
539 <li><a href="#sec-4-4">4.4. Mathematical formulas</a></li>
540 <li><a href="#sec-4-5">4.5. Sinus heightmaps and sphere</a></li>
547 <footer id="postamble" class="">
548 <div><p class="author">Author: Svjatoslav Agejenko</p>
549 <p class="date">Created: 2020-01-29 K 21:40</p>
550 <p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>