https://github.com/cleoold/circulars_space

a (non)uniform circular(elliptic) motion demo in physics!
https://github.com/cleoold/circulars_space

animation physics vanilla-javascript

Last synced: 10 months ago
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a (non)uniform circular(elliptic) motion demo in physics!

• Host: GitHub
• URL: https://github.com/cleoold/circulars_space
• Owner: cleoold
• License: other
• Created: 2019-08-18T17:26:55.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2020-08-27T06:10:00.000Z (almost 6 years ago)
• Last Synced: 2025-03-16T08:28:35.325Z (over 1 year ago)
• Topics: animation, physics, vanilla-javascript
• Language: JavaScript
• Homepage: https://cleoold.github.io/circulars_space
• Size: 794 KB
• Stars: 3
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

          
# interactive circular/elliptic motion demo

* uniform circular motion

![uniform circular motion](https://cleoold.com/wp-content/uploads/2019/08/ffawvv.gif)

* many uniform circular motions

![uniform circular motion](https://cleoold.com/wp-content/uploads/2019/08/gsgeef.gif)

* many circular motions with varying focus length & speed

![elliptic motion](https://cleoold.com/wp-content/uploads/2019/08/dadasdsa.gif)

* elliptic motion and harmonic motion with rotation

![elliptic motion](https://cleoold.com/wp-content/uploads/2019/08/dawbsd.gif)

* real elliptic motion (planet models)

![elliptic motion](https://cleoold.com/wp-content/uploads/2019/08/dafwwg.gif)

This is the elliptic motion version.

uniform (probably not so uniform because it supports linear acceleration) circular motion demo page with auto div scaling!

see demo at https://cleoold.github.io/uniform_circular_motion/index.html

#### Interesting setups

* two uniform circular motions

  * Block 1: 

    semi X axis:166, Rx Δ: 0, semi Y axis: 166, Ry Δ: 0, period: 10, T Δ: 0, rotate angle: 0, α Δ: 0, rotate around: origin

  * Block 2:

    96, 0, 96, 0, 10, 0, 0, 0, origin

* two springs perpendicular to each other and rotating

  * Block 1:

    162, 0, 0, 0, 5, 0, 0, 10, origin

  * Block 2:

    0, 0, 162, 0, 5, 0, 0, 10, origin

* one oscillation and a bigger rotating ellipse

  * Block 1:

    50, 0, 0, 0, 1, 0, 0, 0, origin

  * Block 2:

    180, 0, 80, 0, 5, 0, 0, 30, origin

* chaotic comet with unknown trajectory

  * Block 1:

    80, 0, 80, -10, 2, 0, 0, 30, focus

* planets

  * Block 1: 50, 0, 50, 0, 5, 0, 0, 0, origin

  * Block 2: 60, 0, 59, 0, 10, 0, 0, 0, focus

  * Block 3: 80, 0, 75, 0, 22, 0, 0, 0, focus

  * Block 4: 90, 0, 82, 0, 5, 0, 0, 0, focus

  * Block 5: 162, 0, 122, 0, 5, 0, 0, 0, focus

  * Block 6: 271, 0, 271, 0, -10, 0, 0, 0, origin

##### Some special points to point:

* The size of the container (which contains balls) will change based on the change of the window size while the ball preserves its semi-X-axis and semi-Y-axis (or radius) of circular motion. If the ball hits the boundary it will stop.

* The layout is optimized(?) for the screen size of the device.

* The `X-axis` and `Y-axis` are un-settable. Instead the offset can be set by dragging the ball.

* When reset, the semi-X-axis and semi-Y-axis of circular motion is set default to half of the container length.

* If the semi-X-axis or semi-Y-axis changes when the ball is in motion, the text in the `semi-X-axis(px)` or `semi-Y-axis(px)` box does not change; but when the user clicks the text box, it changes to the newest value. Same for period.

* `one-click` options are hidden if there is only one ball present.

* if `star background` is enabled, overflowing contents in the container will display.

#### Not compatible with

* Dark reader (trajectory randomly goes missing)

#### License

* [CC BY-NC-SA 4.0](http://creativecommons.org/licenses/by-nc-sa/4.0/)