FUNCTION PRINT_AT {
    PARAMETER DESCRIPTION.
    PARAMETER TEXT.
    PARAMETER STRING_NUM.

    PRINT DESCRIPTION AT(0,STRING_NUM) + "          " + TEXT AT(0,STRING_NUM).
}.


FUNCTION CIRCLING_FROM_PERIAPSIS {
    //At this point, our apoapsis is above 100km and our main loop has ended. Next
    //we'll make sure our throttle is zero and that we're pointed prograde
    PRINT "Disable engine".
    LOCK THROTTLE TO 0.

    PRINT "Waiting to rich APOAPSIS".

    UNTIL (ETA:APOAPSIS < 30) {
        SET MYSTEER TO HEADING(90,0).
        PRINT "Pitching to 0 degrees" AT(0,15).
        PRINT_AT("APOAPSIS",ROUND(SHIP:APOAPSIS,0),16).
        PRINT_AT("ALTITUDE",ROUND(SHIP:ALTITUDE,0),17).
        PRINT_AT("ETA:APOAPSIS",ETA:APOAPSIS,18).
    }.

    PRINT "Pitching to 0 degrees".
    SET MYSTEER TO HEADING(90,0).
    LOCK THROTTLE TO 1.0.

    UNTIL (ABS((SHIP:APOAPSIS - SHIP:PERIAPSIS)/SHIP:PERIAPSIS) < 0.05 ) {
        PRINT_AT("SHIP:APOAPSIS",SHIP:APOAPSIS,15).
        PRINT_AT("SHIP:PERIAPSIS",SHIP:PERIAPSIS,17).
        PRINT_AT("ABS(SHIP:APOAPSIS - SHIP:PERIAPSIS)",ABS(SHIP:APOAPSIS - SHIP:PERIAPSIS),23).


        IF ETA:APOAPSIS  { BREAK. }
    }.

    LOCK THROTTLE TO 0.
}.




//hellolaunch

//First, we'll clear the terminal screen to make it look nice
CLEARSCREEN.


//Next, we'll lock our throttle to 100%.
LOCK THROTTLE TO 1.0.   // 1.0 is the max, 0.0 is idle.

// //This is our countdown loop, which cycles from 10 to 0
// PRINT "Counting down:".
// FROM {local countdown is 10.} UNTIL countdown = 0 STEP {SET countdown to countdown - 1.} DO {
//     PRINT "..." + countdown.
//     WAIT 1. // pauses the script here for 1 second.
// }

//This is a trigger that constantly checks to see if our thrust is zero.
//If it is, it will attempt to stage and then return to where the script
//left off. The PRESERVE keyword keeps the trigger active even after it
//has been triggered.
WHEN MAXTHRUST = 0 THEN {
    PRINT "Staging".
    STAGE.
    PRESERVE.
}.

//This will be our main control loop for the ascent. It will
//cycle through continuously until our apoapsis is greater
//than 100km. Each cycle, it will check each of the IF
//statements inside and perform them if their conditions
//are met
SET MYSTEER TO HEADING(90,90).
LOCK STEERING TO MYSTEER. // from now on we'll be able to change steering by just assigning a new value to MYSTEER
UNTIL SHIP:APOAPSIS > 100000 { //Remember, all altitudes will be in meters, not kilometers

    //For the initial ascent, we want our steering to be straight
    //up and rolled due east
    IF SHIP:VELOCITY:SURFACE:MAG < 100 {
        //This sets our steering 90 degrees up and yawed to the compass
        //heading of 90 degrees (east)
        SET MYSTEER TO HEADING(90,90).

    //Once we pass 100m/s, we want to pitch down ten degrees
    } ELSE IF SHIP:VELOCITY:SURFACE:MAG >= 100 AND SHIP:VELOCITY:SURFACE:MAG < 800 {
        SET PITCH_ANG TO (SHIP:ALTITUDE - 24033)/(-282).
        SET MYSTEER TO HEADING(90,ROUND(PITCH_ANG,0)).
        PRINT "Pitching to " + PITCH_ANG + " degrees" AT(0,15).
        PRINT_AT("APOAPSIS",ROUND(SHIP:APOAPSIS,0),16).

    //Beyond 800m/s, we can keep facing towards 10 degrees above the horizon and wait
    //for the main loop to recognize that our apoapsis is above 100km
    } ELSE IF SHIP:VELOCITY:SURFACE:MAG >= 800 {
        SET MYSTEER TO HEADING(90,10).
        PRINT "Pitching to 10 degrees" AT(0,15).
        PRINT_AT("APOAPSIS",ROUND(SHIP:APOAPSIS,0),16).
        PRINT_AT("ALTITUDE",ROUND(SHIP:ALTITUDE,0),18).
    }.

}.

CLEARSCREEN.

PRINT "100 km apoapsis reached, cutting throttle".

SET MYSTEER TO HEADING(90,0).
PRINT "Pitching to 0 degrees".

CIRCLING_FROM_PERIAPSIS()


//This sets the user's throttle setting to zero to prevent the throttle
//from returning to the position it was at before the script was run.
SET SHIP:CONTROL:PILOTMAINTHROTTLE TO 0.