Recent content by Albinon

  1. Albinon

    MultiStar Orbiter 2013-08-25

    This is a set of programs that create and modify single star solar systems.  It is based on a MS ACCESS 2000 database and driven by MS VB 2010 express. It wil create up to 1000 solar systems and set up a star system file with associated config files.  Browse the database after you create...
  2. Albinon

    Project Math problems with RPOS and RVEL

    Not a problem It just re-affirms the process. It is helpful as well. I'm still getting "sideways" with this matrix math....:confused: However you're helping me get it. I wish I had you and ADSWNJ as teachers back in the 70's when I was taking math.
  3. Albinon

    Project Math problems with RPOS and RVEL

    Hard to explain with out a picture or a similar set of vocabulary ( I don't speak math or German- your English is very good, and your math is way beyond me), but I will try with the following; Which is the horizontal parameter in the MMUL statement- R2 or R3_W? Horizontal - (x, y, z)...
  4. Albinon

    A little math puzzle for you all

    Quote: Originally Posted by BLANDCorporatio I'm afraid that candidate solution computes abs(A - B). It does not compute (A xor B). Just an example: let A = 16, B = 1. A-B = 15, A xor B = 17. I do agree with you when using Binary math, however the problem originally stated physically...
  5. Albinon

    Project Math problems with RPOS and RVEL

    You're right, I misspoke when I said r was semi-minor. I meant to say semi-major as it is both the periapsis and on one end of the semi-major assuming RPOS = (r,0,0) and RVEL = (0,0,v) Great, more math home work... I was hoping to have the week-end free ;) ---------- Post added at 03:35 PM...
  6. Albinon

    A little math puzzle for you all

    For Volume(A) XOR Volume(B): If Volume(A) > Volume(B) then the resulting volume = Volume(A) - Volume(B) If Volume(B) > Volume(A) then the resulting volume = Volume(B) - Volume(A) If Volume(A) = Volume(B) then the resulting volume = 0 Place a mark in both buckets where the top of the volume...
  7. Albinon

    Project Math problems with RPOS and RVEL

    Not many, just the basic calculation that puts it at RPOS r, 0, 0 and RVEL 0, 0, v with r giving me semi-minor, LAN and AgP/TrA I was trying to over-simplify and calculate it from those, but I now understand that I cannot cut corners. Remember, math is not my forte'. I need a "pretty...
  8. Albinon

    Project Math problems with RPOS and RVEL

    I thank you for this, however research shows me that all three methods require the knowledge of the semi-major axis (I could be wrong, I'm pretty weak in math). I am trying to calculate it without measurements or orbiter's API suite. r_a (Apoapsis) = a(1+e) h =√(a*u*(1-e^2)) T (orbital period)...
  9. Albinon

    Project Math problems with RPOS and RVEL

    Ran into a circular argument... a=(b√(1-e^2 ))/(1-e^2 ) e=√(1+(2Eh^2)/u^2 ) E=v^2/2-u/√(x^2+y^2+z^2 ) h=√(a*u*(1-e^2)) It seems that a semi-major axis can't be calculated with out already knowing what it is... Does anyone have a different method?
  10. Albinon

    Project Math problems with RPOS and RVEL

    OK, I'll give it a shot and let you know. Also, I did a bit of research on my own. Since most orbits are considered ellipses, I got velocity as G = 0.0000000000667 ' Gravitational Constant a = Val(OrbitSMA.Text) 'semi-major axis (furthest from center of orbit) M = Val(BodyMass.Text) U = G *...
  11. Albinon

    Project Math problems with RPOS and RVEL

    Yes, the planets are set up using normal Orbiter parameters. I place them into a cfg file according to orbiter specifications. The parameters are stored in a database that my program has access to. The system, star, planet and moons work normally. As a programmer, I can work out the processes...
  12. Albinon

    Project Math problems with RPOS and RVEL

    Explan Not in Visual Studios Visual Basic 2010 I am the opposite, good with the programming, not good with the math. I do understand the theory on orbital mechanics, just don't ask me to do the math part. My problem now is setting up the orientation of the 2 planes. I think I got the X-Y...
  13. Albinon

    Project Math problems with RPOS and RVEL

    Is wrong. Should be: ' pVelocity in cartesian coordinates Dim vx AsDouble = 0 Dim vy AsDouble = 0 Dim vz AsDouble = v Still working out how to get a proper Keplerian orbit. Anyone got an idea?
  14. Albinon

    Project Math problems with RPOS and RVEL

    Working code This code gives an orbit. (finally). Not the one I want, but it is working a lot better. ' Euler X is the Vernal Equinox or Vernal Point ' Euler y is approximately Polaris ' Euler z is between Taurus and Gemini ' this matches the Orbiter system of coordinates. Dim ToRadian...
  15. Albinon

    Project Math problems with RPOS and RVEL

    From Orbiter's reference guide on scenario editing: 2.3 Orbital elements Use this page to place a vessel into orbit around a celestial body. First select the object (planet, moon or sun) around which you want your vessel to orbit in the Orbit reference box. Next, in the Frame box, select...
Top