# Earth to move in it's orbit
**URL:** https://discourse.processing.org/t/earth-to-move-in-its-orbit/1379
**Category:** Coding Questions
**Created:** [June 30, 2018, 8:17am UTC](https://discourse.processing.org/t/earth-to-move-in-its-orbit/1379 "2018-06-30T08:17:19Z")
**Posts on this page:** 10
**Page:** 1
### Author:  [@akash](https://discourse.processing.org/u/akash)
#### Post date: [June 30, 2018, 8:17am UTC](https://discourse.processing.org/t/earth-to-move-in-its-orbit/1379/1 "2018-06-30T08:17:19Z")
I have two ellipse.
one is larger ellipse and another is smaller ellipse.
i want smaller ellipse to follow the path of the larger ellipse. Your suggestions are needed?.
( i am a beginner).
---
### Author:  [@josephh](https://discourse.processing.org/u/josephh)
#### Post date: [June 30, 2018, 9:36am UTC](https://discourse.processing.org/t/earth-to-move-in-its-orbit/1379/2 "2018-06-30T09:36:42Z")
If you have an ellipse like this :
You have the coordinates of your smaller ellipse with this formula :
Example :
```auto
float t = 0;
int a = 150;
int b = 100;
void setup(){
size(400,400);
}
void draw(){
background(255);
translate(width/2,height/2);
noFill();
ellipse(0,0,a*2,b*2);
fill(0,0,255);
ellipse(a*cos(t),b*sin(t),10,10);
t += 0.01;
}
```
You can find further informations on : [https://en.wikipedia.org/wiki/Ellipse](https://en.wikipedia.org/wiki/Ellipse)
---
### Author:  [@akash](https://discourse.processing.org/u/akash)
#### Post date: [June 30, 2018, 4:09pm UTC](https://discourse.processing.org/t/earth-to-move-in-its-orbit/1379/3 "2018-06-30T16:09:45Z")
Thanks a lot for reply, with the suggestion you gave I successfully made whole solar system. However, all the planets are revolving with same speed. I want their speeds to be varied with each other. Your suggestion is required.
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### Author:  [@josephh](https://discourse.processing.org/u/josephh)
#### Post date: [June 30, 2018, 4:11pm UTC](https://discourse.processing.org/t/earth-to-move-in-its-orbit/1379/4 "2018-06-30T16:11:17Z")
> [@akash](#):
>
> I want their speeds to be varied with each other.
Just create separate variables for each planets :
```auto
float t_sun, t_venus, t_mars ...
```
And increment them differently.
---
### Author:  [@akash](https://discourse.processing.org/u/akash)
#### Post date: [July 3, 2018, 6:10pm UTC](https://discourse.processing.org/t/earth-to-move-in-its-orbit/1379/5 "2018-07-03T18:10:35Z")
My face detection is not working? Suggestion needed
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### Author:  [@josephh](https://discourse.processing.org/u/josephh)
#### Post date: [July 3, 2018, 7:14pm UTC](https://discourse.processing.org/t/earth-to-move-in-its-orbit/1379/6 "2018-07-03T19:14:51Z")
Hey,
Can you post your code using `<\>` in the message editor and press `Ctrl+T` in the processing IDE ?
Don’t take pictures, take screenshots.
---
### Author:  [@akash](https://discourse.processing.org/u/akash)
#### Post date: [July 4, 2018, 11:52am UTC](https://discourse.processing.org/t/earth-to-move-in-its-orbit/1379/7 "2018-07-04T11:52:43Z")
Is it necessary to install openCv to use openCv library for processing
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### Author:  [@josephh](https://discourse.processing.org/u/josephh)
#### Post date: [July 4, 2018, 2:24pm UTC](https://discourse.processing.org/t/earth-to-move-in-its-orbit/1379/8 "2018-07-04T14:24:38Z")
Yes, go to `Sketch > Import a library > Add a library > install OpenCV`.
---
### Author:  [@akash](https://discourse.processing.org/u/akash)
#### Post date: [July 14, 2018, 3:27pm UTC](https://discourse.processing.org/t/earth-to-move-in-its-orbit/1379/9 "2018-07-14T15:27:52Z")
what is the meaning of
Client thisclient=myserver.available() ?
i am not getting the significance and meaning of available()
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### Author:  [@josephh](https://discourse.processing.org/u/josephh)
#### Post date: [July 14, 2018, 4:24pm UTC](https://discourse.processing.org/t/earth-to-move-in-its-orbit/1379/10 "2018-07-14T16:24:01Z")
Go check out the documentation on the Network library (it is very helpful) 🙂 :
- [https://processing.org/reference/libraries/net/index.html](https://processing.org/reference/libraries/net/index.html)
- [https://processing.org/reference/libraries/net/Client\_available\_.html](https://processing.org/reference/libraries/net/Client_available_.html)