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| Name | Modified | Size | Downloads / Week |
|---|---|---|---|
| Parent folder | |||
| moon_texture.jpg | 2011-04-21 | 972.4 kB | |
| sky_map_texture.jpg | 2011-04-21 | 26.6 kB | |
| earth_texture.jpg | 2011-04-21 | 189.5 kB | |
| readme.txt | 2011-04-05 | 2.6 kB | |
| earth_moon_orbits_v1.1.zip | 2011-03-22 | 10.7 MB | |
| Totals: 5 Items | 11.9 MB | 0 | |
************************* * Earth Moon orbits demo * ************************* Tools : J3DWorkbench Author : Bernard Agnamazian 'Earth Moon orbits' is a simplified scenario of the Sun, Earth and Moon orbital system. The distances are not drawn to scale for a better and clearer display. This demo is intended to demonstrate certain capabilities of J3DWorkbench. It highlights the basics of 3D objects handling, the rotational motion of objects (Rotation Interpolator), the camera position (View), groups of objects, and their hierarchy nature. A tutorial on how to build the scene 'from scratch' is coming soon. *********** * Loading * *********** Unzip the file and load the moon_phases.j3d in J3DWorkbench. : File > Load Scene. Observe the Earth orbiting around the Sun, and the Moon around the Earth. In this scenario 1 day = 1 second. ******** * View * ******** On the View1 there is the whole perspective, while view2 shows a fixed camera relative to Earth. In View2, you can observe the moon phases (28 days) from first moon to new moon to full moon, as you would on Earth. You can detach a View (undock it) by right clicking on the View tab and click detach. ************ * Navigate * ************ Change the camera position by clicking on the 'world' icon and drag the mouse: - Left click Forth and back => Translation forth/back Left and right => Rotation left/right - Mouse Wheel: up and down => Rotation up/down - Right click up and down => Translation up/down Left and right => Translation left/right ******************** * Toggle artifacts * ******************** <Space bar> => start/stop animation <t> => display/remove orbits and axes <s> => display/remove seasons ******************* * Season position * ******************* When the Earth reaches a seasonal point (summer, autumn, winter or spring), stop the animation and in the view2, move around the globe. Observe the Earth's tilt against the ecliptic plane (Earth orbit). ************** * Time speed * ************** If you want to change the time scale, change the following values in the left panel : - In the Scene Graph view : Expand KeyStrokeTrigger Earth Moon System Click on Earth - Moon revolution+ rotation - In the Properties panel: Expand ALPHA Change INCREASE_DURATION (in millisecond) Do the same for Earth and Moon Search for 'Earth revolution' rotation interpolator and "Moon orbit" interpolator. (Keep the same ratio between them!).