Hook up ephem calcs

[sirkitree]

Hook up ephem calcs

[sirkitree]

from @kentbye

Below is the code snippet from my nataltransits code that does the heavy lifting from moshier's ephemeris.
It takes an input date and a const.body (which is one of the planets) into $processor.calc. (the input dates are taken from the dropdown menus)

    for (var key in $moshier.body) {
      if (key != 'init' &&  key != 'earth' &&  key != 'sirius'){
        if ($moshier.body.hasOwnProperty(key)) {
          $const.body = $moshier.body[key];
          $processor.calc ($inputdate, $const.body);
          console.log(JSON.stringify($const.body));
          $planetLongitude[key] = Math.round(parseFloat($const.body.position.apparentLongitude)*10000)/10000;          
          $astrologicalSign = signs[Math.ceil($const.body.position.apparentLongitude/30)];
          if (key=='moon') {
	          $illuminatedFraction = $const.body.position.illuminatedFraction; 
	          if ($const.body.position.phaseDaysBefore) {
		          nextPhase = Math.round($const.body.position.phaseDaysBefore*24*100)/100 + " hrs until ";
	          } else {
			        nextPhase = Math.round($const.body.position.phaseDaysPast*24*100)/100 + " hrs after ";  
	          }
          }

          //Output the position to the screen.
          //document.getElementById(key).innerHTML = key + " = " + $astrologicalSign + " " + $const.body.position.apparentLongitude30String;
        }
      }
    }

[sirkitree]

Before I can implement this, I first have to figure out how to get the position of an element once it's been moved with your hand, and correlate that to the format that the moshier calculation expects. In the above, what is the value of $moshier.body?

[sirkitree]

I found a way to move the spheres and constrain them to a radius and a plane. next up is to make other sphere's move when you move just one, then I think I can plug in some calculations.

[sirkitree]

I currently have the ephemeris calculations hooked up to a radial dial. As you turn the volume up (so to speak) you increment the day, and as you turn it down, it decrements the days. Each value change recalculates the position of the planets and it looks really cool. The upper planets spin pretty fast, almost too fast, but the lower ones you can see orbit around you back and forth, sometimes reversing, as is typical when observed from earth.

Having the day radial is good, now to add one for the month and year.

[sirkitree]

Ephemeris calculations are hooked up. I'm not sure how accurate they are. I'm currently doing the following:

// these roughly correspond to Boston, MA
$const.tlong = -71.10; // longitude
$const.glat = 42.37; // latitude

// initial date
var date = {year: 1981, month: 10, day: 4, hours: 1, minutes: 52, seconds: 0};

// for each planet, calculate it's position from the moshier calculations give the date
var body = $moshier.body[planetName];
$processor.calc(date, body);

// sin and cos of the body position gives us the x and z
var xPos = Math.cos(body.position.apparentLongitude);
var zPos = Math.sin(body.position.apparentLongitude);

// y is just incrementally moving upwards from about knee height
var yPos = ((startPos + (index * 2) / planetTotal) * -1);

Closing this for now. I'm not sure if it's accurate, but it gives us values good enough for visualization. I'd like to open up a new issue from here if there are changes to the calculations.