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// Dark GDK - The Game Creators - www.thegamecreators.com
// the wizard has created a very simple project that uses Dark GDK
// it contains the basic code for a GDK application

// whenever using Dark GDK you must ensure you include the header file
#include "DarkGDK.h"

// the main entry point for the application is this function
void DarkGDK ( void )
{
      int x = 0;
   int view = 0;
   int control = 0;
   float direction_flt = 0;
   float climb_flt = 0;
   float speed_flt = 0;
   float power_flt = 0;
   float rollstep_flt = 0;
   float pitchstep_flt = 0;
   float joyr_flt = 0;
   float joyp_flt = 0;
   float alt_flt = 0;
   float sineroll_flt = 0;
   float rudder_flt = 0;
   float truepitch_flt = 0;
   float gravity_flt = 0;
   float coefdrag_flt = 0;
   float drag_flt = 0;
   int count = 0;

	//this sets our main window up
	dbSetDisplayMode ( 1280 , 768 , 32 );
	//dbSetWindowOff ( );
	dbMaximiseWindow ( );
	dbBackdropOff ( 0 );

	// turn on sync rate and set maximum rate to 60 fps
	dbSyncOn   ( );
	dbSyncRate ( 60 );

    //this prints a message on our start up screen
	dbPrint ( "Please wait trying to load model..." );
	dbSync ( );
	dbSync ( );

	// switch to the media directory 
	SetCurrentDirectory ( "R-C_SimMedia" );

    //load our world and turn lighting off
    dbLoadObject		( "R-C_Sim.x", 1 );  
   	dbSetObjectLight	( 1, 0 );
	dbScaleObject		( 1, 1000, 1000, 1000);

	// load a model for our aircraft
	dbLoadObject		( "Ercoupe.X", 2 );
	dbSetObjectLight	( 2, 0 );
	dbScaleObject		( 2, 100, 100, 100 );
    dbDisableObjectZDepth ( 2 );

	// Load sound
	dbLoad3DSound	( "RC Eng.wav" , 1 );
	dbLoopSound		( 1 );

	// our main loop
	while ( LoopGDK ( ) )
	{
      //  view control Inputs
      if ( dbScanCode() == 59 ) {
         view = 0;
         // F1
      }
      if ( dbScanCode() == 60 ) {
         view = 1;
      }
      if ( dbScanCode() == 61 ) {
         view = 2;
      }
      if ( dbScanCode() == 62 ) {
         view = 3;
      }
       //joystick control
       joyr_flt = dbJoystickX() / 180.0;
       joyp_flt = dbJoystickY() / 180.0;
   
       //  apply aileron
       rollstep_flt = rollstep_flt + ( joyr_flt / 8 );
       // provides an intertia effect
       rollstep_flt = rollstep_flt * .4;
       // provides a damping effect..   a value like .95 or higher  will also allow a
       // wandering effect such as you get with some less laterally stable model aircraft.
       dbRollObjectRight( 2, rollstep_flt );
       // basic aileron / roll action of plane
   
       // apply elevator
       pitchstep_flt = pitchstep_flt + ( joyp_flt / 20 );
       pitchstep_flt = pitchstep_flt * .7;
       dbPitchObjectUp( 2, pitchstep_flt );
      
       // get a roll angle  related to WORLD horizontal. When the plane is tilted, pitched or turned this provides
       //  a  result different from  the plane relative roll angle.  This difference  makes the system work.
       alt_flt = dbObjectPositionY( 2 );
       dbTurnObjectRight( 2, 90 );
       dbMoveObject( 2, 1 );
       sineroll_flt = dbObjectPositionY( 2 ) - alt_flt;
       dbMoveObject( 2, -1 );
       dbTurnObjectLeft( 2, 90 );
   
       //then split the tilted lift vector of the wings between the WORLD horizontal and vertical axis using sineroll.
       dbTurnObjectLeft( 2, sineroll_flt );
       dbPitchObjectUp( 2, dbAbs( sineroll_flt ) / 2 );

       //get world related pitch.
       dbMoveObject( 4, 1 );
       truepitch_flt = alt_flt - dbObjectPositionY( 4 );
       dbMoveObject( 4, -1 );
       gravity_flt = truepitch_flt * 2;

       //add  a cheap glide effect!
       if ( speed_flt < 2.5 && truepitch_flt < .3 ) {
           dbPitchObjectDown( 4, .15 );
        }
   		//adjust camera 
	    if (view == 0) {
		 dbPositionCamera (0, 6, -20);
         dbPointCamera( dbObjectPositionX( 2 ), dbObjectPositionY( 2 ), dbObjectPositionZ( 2 ) );
		}

      if ( view == 1 ) {

      }
       dbPositionSound ( 1, dbObjectPositionX( 2 ), dbObjectPositionY( 2 ), dbObjectPositionZ( 2 ) );

	   // update the screen
		dbSync ( );
	}

	// return back to windows
	return;
}