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Easy Java Simulations (2001- ) => Collaborative Community of EJS => Topic started by: lookang on June 23, 2011, 03:53:42 pm



Title: Ejs Open Source Kepler 3rd Law System Model Java Applet
Post by: lookang on June 23, 2011, 03:53:42 pm
Ejs Open Source Kepler 3rd Law System Model Java Applet by lookang based on works by Todd Timberlake.
A remix simulation for this worksheet by Jimmy Goh and lookang.

reference:
http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=1501.0 Remixed by lookang based on Original by Todd Timberlake
http://www.compadre.org/osp/items/detail.cfm?ID=9757 Original by Todd Timberlake  


Title: Re: Ejs Open Source Kepler 3rd Law System Model Java Applet
Post by: lookang on June 23, 2011, 04:53:09 pm
new worksheet


Title: Re: Ejs Open Source Kepler 3rd Law System Model Java Applet
Post by: lookang on June 27, 2011, 09:33:03 am
changes made:
26 june 2011
remixed from http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=1501.0
added real picture of planets
moved all control to bottom panel for ease of inquiry learning
must select a planet first before running the sim
made common checkbox to visual common variables for quick access.
made the reset remember previous planet remove removing numbers in the variable page.


known bug
render of simple 3d pictures which have transparent background should be transparent but is reckon with black ground which is not ideal and in earlier Ejs it is transparent.


Title: Re: Ejs Open Source Kepler 3rd Law System Model Java Applet
Post by: Vegard Farstad on March 12, 2012, 04:32:07 pm
Good sim!

I noticed a possible bug - the chosen planet seems to have a "twin" in the same orbit. I was a bit confused by the sequence of the display choices, they might be rearranged or it could be explained why they are in this order. And do you think it will be developed further so that it would e.g. be possible to select the POV position in 3D space? Also, would it be possible (a huge upgrade probably) to connect the simulator to the real positions? And even generate views of how the sky would look? I mean, just now it is possible to view all the large planets in the sky during a single night, and Venus/Jupiter are very close to each other. It would be really cool if this simulation could be used to predict such events :-) But it is perhaps too ambitious?


Title: Re: Ejs Open Source Kepler 3rd Law System Model Java Applet
Post by: lookang on March 13, 2012, 05:44:51 am
work in progress

0 = mercury, 1 = Venus, 2= Mars, 3 = Jupiter , 4=Saturn, 5= Uranus, 6= Neptune, 7=Pluto


Title: Re: Ejs Open Source Kepler 3rd Law System Model Java Applet
Post by: lookang on March 13, 2012, 09:21:18 am
Good sim!
Thanks Bro!


I noticed a possible bug - the chosen planet seems to have a "twin" in the same orbit.
Fixed Thanks! for feedback
fix bug of double planets thanks to Vegard Farstad feedback!

I was a bit confused by the sequence of the display choices, they might be rearranged or it could be explained why they are in this order.
these are original from Todd's OSP model, i merely put them together as i didn't need them for grade 11 and 12  
u have suggestions to make them in a particular order?


And do you think it will be developed further so that it would e.g. be possible to select the POV position in 3D space?
 Also, would it be possible (a huge upgrade probably) to connect the simulator to the real positions? And even generate views of how the sky would look? I mean, just now it is possible to view all the large planets in the sky during a single night, and Venus/Jupiter are very close to each other. It would be really cool if this simulation could be used to predict such events :-) But it is perhaps too ambitious?
Real position is possible if i am the original physicist into astronomy hahahaha.
I think i can figure out a way to tell time but where can i find data on this?
 

And even generate views of how the sky would look? I mean, just now it is possible to view all the large planets in the sky during a single night, and Venus/Jupiter are very close to each other. It would be really cool if this simulation could be used to predict such events :-) But it is perhaps too ambitious?
done!
enjoy!
thanks to Todd's sharing of his awesome model, i was able to stand on the shoulder of the OSP giants :)
added all planets showing on the Ecliptic View Frame from Earth's perspective, a feature missing in Todd's version Nov 2011







Title: Re: Ejs Open Source Kepler 3rd Law System Model Java Applet
Post by: lookang on April 16, 2012, 02:00:26 pm
finally fixed the bug of double planets

enjoy!