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appJupiter.ino
106 lines (93 loc) · 3.21 KB
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appJupiter.ino
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// Display Jupiters 4 moons
// It uses the current date time and corrects to get UTC time
// Make sure you set the correct Time Zone below
#define APP_TIME_ZONE -8 // I am West Coast in Standard Time.
void jSats() {
// Get the current info
RTC_Date tnow = ttgo->rtc->getDateTime();
hh = tnow.hour;
mm = tnow.minute;
ss = tnow.second;
dday = tnow.day;
mmonth = tnow.month;
yyear = tnow.year;
float tDay = dday; // Calculate the day plus fractional day
tDay += (hh - APP_TIME_ZONE) / 24.0;
tDay += mm / 1440.0;
int16_t tYear = yyear;
int8_t tMonth = mmonth;
int16_t cYear, cMonth;
if (tMonth < 3) {
cYear = tYear - 1;
cMonth = tMonth + 12;
} else {
cYear = tYear;
cMonth = tMonth;
}
// Calculate the Julian Date offset from Epoch
int a = cYear / 100;
int b = 2 - a + (int)(a / 4);
long c = 365.25 * cYear;
long d = 30.6001 * (cMonth + 1);
float N = b + c + d + tDay - 694025.5;
// Calc moon positions
float P = PI / 180;
float MT = (358.476 + 0.9856003 * N) * P;
float MJ = (225.328 + 0.0830853 * N) * P;
float JJ = 221.647 + 0.9025179 * N;
float VT = 1.92 * sin(MT) + 0.02 * sin(2 * MT);
float VJ = 5.55 * sin(MJ) + 0.17 * sin(2 * MJ);
float K = (JJ + VT - VJ) * P;
float DT = sqrt(28.07 - 10.406 * cos(K));
float Z1 = sin(K) / DT;
float I = atan(Z1 / sqrt(1 - Z1 * Z1));
I = I / P;
float F = (N - DT / 173);
float F1 = I - VJ;
float U1 = 84.5506 + 203.405863 * F + F1;
float U2 = 41.5015 + 101.2916323 * F + F1;
float U3 = 109.9770 + 50.2345169 * F + F1;
float U4 = 176.3586 + 21.4879802 * F + F1;
float X1 = 5.906 * sin(U1 * P);
float X2 = 9.397 * sin(U2 * P);
float X3 = 14.989 * sin(U3 * P);
float X4 = 26.364 * sin(U4 * P);
// Print out results
ttgo->tft->fillScreen(TFT_BLACK);
ttgo->tft->setTextSize(2);
ttgo->tft->setCursor( 0, 10);
ttgo->tft->setTextColor(TFT_ORANGE);
ttgo->tft->print(" IO: ");
ttgo->tft->print(X1, 1);
ttgo->tft->setCursor( 0, 30);
ttgo->tft->setTextColor(TFT_BLUE);
ttgo->tft->print(" EU: ");
ttgo->tft->println(X2, 1);
ttgo->tft->setCursor( 0, 50);
ttgo->tft->setTextColor(TFT_GREEN);
ttgo->tft->print(" GA: ");
ttgo->tft->println(X3, 1);
ttgo->tft->setCursor( 0, 70);
ttgo->tft->setTextColor(TFT_YELLOW);
ttgo->tft->print(" CA: ");
ttgo->tft->println(X4, 1);
//Now display them as they would appear
ttgo->tft->fillCircle(119, 155, 6, TFT_RED); // Jupiter
ttgo->tft->setTextColor(TFT_ORANGE);
ttgo->tft->fillCircle(int(X1 * 4 + 119), 155, 2, TFT_ORANGE);
ttgo->tft->drawString("I", int(X1 * 4 + 119)-3, 175 , 1);
ttgo->tft->setTextColor(TFT_BLUE);
ttgo->tft->fillCircle(int(X2 * 4 + 119), 155, 2, TFT_BLUE);
ttgo->tft->drawString("E", int(X2 * 4 + 119)-3, 175, 1);
ttgo->tft->setTextColor(TFT_GREEN);
ttgo->tft->fillCircle(int(X3 * 4 + 119), 155, 2, TFT_GREEN);
ttgo->tft->drawString("G", int(X3 * 4 + 119)-3, 175, 1);
ttgo->tft->setTextColor(TFT_YELLOW);
ttgo->tft->fillCircle(int(X4 * 4 + 119), 155, 2, TFT_YELLOW);
ttgo->tft->drawString("C", int(X4 * 4 + 119)-3, 175, 1);
// Wait for touch to return
int16_t x, y;
while (!ttgo->getTouch(x, y)) {} // Wait for touch
while (ttgo->getTouch(x, y)) {} // Wait for release
ttgo->tft->fillScreen(TFT_BLACK);
}