Re: [Gpredict-discussion] ISS trail

[Andrew R. <vk...@te...>]

Charles

I will try and describe it - bear with me

What I am seeing is that an orbit is shown in full

The object on the screen traces out the orbit.

The next orbit is only drawn when the object hits the "end" of the tail of 
the currently displayed orbit.

The orbit line does not "move" in time with the object.

Can you code it so that the orbit line always has the object in the middle 
of the orbit line ?

This is how it is now in map view

------O-----------------------------------------

----------------O-------------------------------

-----------------------------------O------------

--------------------------------------------O---

Then a new orbit is drawn.

What I would like is

-------------------O----------------------------


                      -------------------O----------------------------



                                           -------------------O----------------------------


See how the orbit line progresses forward with the object ?

Go forward and back wards in real time with the object

Make the orbit line "snake" across with the object as it moves

I guess the code would be

1. Work out half an orbit forward and draw line
2. Work out half an orbit behind and draw line

BUT update it real time with the object

Don't wait till she hits the "end" of the orbit to draw the line again

- Andrew -



----- Original Message ----- 
From: "Charles Suprin" <ham...@gm...>
To: "Andrew Rich" <vk...@te...>
Cc: <gpr...@li...>
Sent: Sunday, March 27, 2011 2:02 AM
Subject: Re: [Gpredict-discussion] ISS trail


Andrew,

I am not sure what you are saying.  Do you not like the results when
running two orbits?  Do you not want to run two orbits?

The existing code is basically as follows: The current orbit is always
displayed in full.  Then the number of orbit-1 future orbits are
displayed in full.

Can you describe what you would like to see?

Charles

On Sat, Mar 26, 2011 at 11:50 AM, Andrew Rich <vk...@te...> 
wrote:
> Bummer
>
> I run just one orbit trail
>
>
> ----- Original Message ----- From: "Charles Suprin" <ham...@gm...>
> To: "Andrew Rich" <vk...@te...>
> Cc: <gpr...@li...>
> Sent: Saturday, March 26, 2011 10:10 PM
> Subject: Re: [Gpredict-discussion] ISS trail
>
>
>> Andrew,
>>
>> One thing you can do is to have gpredict plot more than a single
>> orbit. This is changed towards the bottom of the mapview properties
>> dialog. The track will update on an orbit boundary.
>>
>> Charles
>>
>> On Sat, Mar 26, 2011 at 2:27 AM, Andrew Rich <vk...@te...>
>> wrote:
>>>
>>> Is there a way to get the trail to update earlier than when the ISS
>>> object hits the end of the orbt in map view ?
>>>
>>> The line is "stale" until it hits the end of the current orbit
>>>
>>> - Andrew -
>>>
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