solar system coordinates in java

[srose]

Hi
I am making a simulation of the inner planets of the solar system using the three-step Beeman scheme. I am confused about how to display the planets. for my starting inputs I have the data from NASA JPL website, so for the Earth I have the following:

 Planet Name	 positionX		     positionY		    velocityX(km/s)	    velocityY(km/s)      radius	 acceleration	 mass(kg)
Earth		-1.685246520883574E-01  9.687833042792607E-01	-1.723394582127405E-02	-3.007660313409631E-03	   50	     0		 5.9736e+24

These values are huge so how do I convert these to the cartesian coordinates that JAVA uses?

Thanks

[keang]

These values are huge so how do I convert these to the cartesian coordinates that JAVA uses?

You scale them to fit the display area you have available to you.

Find the largest planet coordinate (call it A), find the largest screen co-ordinate you want to use (call it B) and divide all the planet coordinates by A and multiply them by B. This will give you the screen location co-ordinates.