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#define FALLING        0000
#define BOTTOM_REACHED 0001
#define NO_SUCH_OBJ    0002
#define NOT_FALLING    0003

class gravity
{
private:

	int y_pos;
	int min_pos;
	int fall_rate;
	int object;

	bool falling;

public:

	gravity ();
	gravity (int, float, float, float);

	void InitGrav    (int, float, float, float);
	int  runGrav     ();
	void SetFallRate ();
	void IsFalling   (bool);
};

#endif

#include "DarkGDK.h"
#include "SC_Collision.h"
#include "gravity.h"

#define WORLD     0001
#define TEXTURE_1 0002
#define PLAYER    0003

void ControlPlayer (int object)
{
	dbSetObjectToCameraOrientation (object);

	if (dbUpKey () || dbKeyState (17))
	{
		dbMoveObject (object, 20.0f);
	}
	if (dbDownKey () || dbKeyState (31))
	{
		dbMoveObject (object, -20.0f);
	}
	if (dbLeftKey () || dbKeyState (30))
	{
		dbYRotateCamera (0, dbCameraAngleY () - 90);
		dbSetObjectToCameraOrientation (object);
		dbMoveObject (object, 20.0f);
		dbYRotateCamera (0, dbCameraAngleY () + 90);
	}
	if (dbRightKey () || dbKeyState (32))
	{
		dbYRotateCamera (0, dbCameraAngleY () + 90);
		dbSetObjectToCameraOrientation (object);
		dbMoveObject (object, 20.0f);
		dbYRotateCamera (0, dbCameraAngleY () - 90);
	}
}

void DarkGDK ()
{
	gravity player_grav;

	dbSyncOn   ();
	dbSyncRate (30);

	dbLoadObject     ("universe.dbo", WORLD);
	dbPositionObject (WORLD, 0, 0, 0);

	dbMakeObjectBox (PLAYER, 10, 10, 10);
	dbHideObject (PLAYER);
	player_grav.InitGrav (PLAYER, dbObjectPositionY (PLAYER), -600, 10.0f);

	SC_Start ();

	SC_SetupObject (WORLD,  1, 0);
	SC_SetupObject (PLAYER, 1, 0);

	dbLoadImage ("grass.bmp", TEXTURE_1);

	dbTextureObject (WORLD, TEXTURE_1);
	dbPositionCamera	( 434, 4000, -400);
	dbPositionObject (PLAYER, dbCameraPositionX (), dbCameraPositionY ()-20, dbCameraPositionZ ());

	SC_UpdateObject (PLAYER);

	// camera variables
	float fCameraAngleX = 0.0f;
	float fCameraAngleY = 0.0f;

	// our main loop
	while ( LoopGDK ( ) )
	{
		// create a rotation axis based on mouse movement
		fCameraAngleX = dbWrapValue ( fCameraAngleX + dbMouseMoveY ( ) * 0.4f );
		fCameraAngleY = dbWrapValue ( fCameraAngleY + dbMouseMoveX ( ) * 0.4f );

		// rotate camera
		dbXRotateCamera ( fCameraAngleX );
		dbYRotateCamera ( fCameraAngleY );

		if (SC_ObjectCollision (WORLD, PLAYER))
		{
			float CollideY = SC_GetStaticCollisionY ();
			dbText (10, 30, "You collided with the world!");
			player_grav.IsFalling (false);
			dbPositionObject (1, dbObjectPositionX (PLAYER), CollideY, dbObjectPositionZ (PLAYER));
		}
		else
		{
			player_grav.IsFalling (true);
		}

		if (player_grav.runGrav () == BOTTOM_REACHED)
			dbText (10, 10, "You reached the bottom of the map!");

		dbPositionCamera (dbObjectPositionX (PLAYER), dbObjectPositionY (PLAYER)+20, dbObjectPositionZ (PLAYER));
		ControlPlayer (PLAYER);

		SC_UpdateObject (PLAYER);
		dbSync ();
	}
}