Sixth 3D engine demos
Table of Contents
1 General
- This program is free software: released under Creative Commons Zero (CC0) license
- Program author:
- Svjatoslav Agejenko
- Homepage: https://svjatoslav.eu
- Email: mailto://svjatoslav@svjatoslav.eu
- Other software projects hosted at svjatoslav.eu
1.1 Source code
- Download latest snapshot in TAR GZ format
- Browse Git repository online
Clone Git repository using command:
git clone https://www2.svjatoslav.eu/git/sixth-3d-demos.git
2 Overview
Goal of this project is to show off capabilities and API usage of Sixth 3D engine.
All example scenes in this repository render at interactive framerates.
Download runnable JAR file: sixth-3d-demos.jar
To start demo application, use command:
java -jar sixth-3d-demos.jar
3 Navigating in space
key | result |
---|---|
cursor keys | move: left, right, forward, backward |
mouse scroll wheel | move: up, down |
dragging with mouse | look around |
4 Example scenes in this repository
4.1 Raytracing through voxels
Test scene that is generated simultaneously using:
- conventional polygons
- for realtime navigation, and
- voxels
- for on-demand raytracing
Instead of storing voxels in dumb [X * Y * Z] array, dynamically partitioned octree is used to compress data. Press "r" key anywhere in the scene to raytrace current view through compressed voxel datastructure.
4.2 Conway's Game of Life
The Game of Life, also known simply as Life, is a cellular automaton devised by the British mathematician John Horton Conway in 1970.
- https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life
- Game rules:
- 2 cell states: alive / dead
- Each cell sees 8 neighboring cells.
- If alive cell neighbors count is 2 or 3, then cell survives, otherwise it dies.
- Dead cell becomes alive if neighbors count is exactly 3.
- Game rules:
Current application projects 2D game grid/matrix onto three dimensional space. Extra dimension (height) is used to visualize history (previous iterations) using glowing dots suspended in space.
Usage:
key | result |
---|---|
mouse click on the cell (cell) | toggles cell state |
<space> | next iteration |
ENTER | next iteeration with the history |
"c" | clear the matrix |
4.3 Text editors
Initial test for creating user interfaces in 3D and:
- window focus handling
- picking objecs using mouse
- redirecting keyboard input to focused window
Window focus acts like a stack.
When window is clicked with the mouse, previously focused window (if any) is pushed to the focus stack and new window receives focus. Red frame appears around the window to indicate this.
When ESC key is pressed, window focus is returned to previous window (if any).
When any window is focused, all keyboard input is redirected to that window, including cursor keys. To be able to navigate around the world again, window must be unfocused first using ESC key.
- TODO:
- Improve focus handling:
- Perhaps add shortcut to navigate world without exiting entire stack of focus.
- Possibility to retain and reuse recently focused elements.
- Store user location in the world and view direction with the focused window. So that when returning focus to far away object, user is redirected also to proper location in the world.
- Possibility to store recently visited locations in the world and return to them.
- Improve focus handling:
Quite a lot of text editors can be rendered:
4.4 Mathematical formulas
- TODO: instead of projecting 2D visualizations onto 3D space, visualize some formula using all 3 dimensions avaliable.
4.5 Sinus heightmaps and sphere
Simple test scene. Easy to implement and looks nice.