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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 )
{
	// turn on sync rate and set maximum rate to 60 fps
	dbSyncOn   ( );
	dbSyncRate ( 120 );

	// Maximize Window
	//dbMaximizeWindow();
	//dbSetWindowOff();


	// we are going to use a skybox in this demo and it will
	// be scaled up to quite a large size, this will initially
	// result in it being outside of the cameras default range
	// therefore it will not be drawn, to adjust this we simply
	// increase the cameras range
	dbSetCameraRange ( 1.0f, 50000.0f );

	// two textures are going to be used for the terrain, the first
	// will be the diffuse part and the second will be used to
	// create extra detail on the terrain
	dbLoadImage ( "texture.jpg", 1 );
	dbLoadImage ( "detail.jpg",  2 );
	
	// the first step in creating a terrain is to call the
	// function dbSetupTerrain, this will perform some internal
	// work that allows us to get started
	dbSetupTerrain ( );

	// now we can get started on making the terrain object
	dbMakeObjectTerrain ( 1 );

	// here we pass in a heightmap that will be used to create the terrain
	dbSetTerrainHeightMap ( 1, "practice.jpg" );

	// now we set the scale, this will have the effect of making
	// the terrain large on the X and Z axis but quite small on the Y
	dbSetTerrainScale ( 1, 3.0f, 0.6f, 3.0f );

	// adjust the lighting for the terrain, this function takes the ID
	// number, then a direction for the light, then 3 colours for the light
	// and finally the scale, by using this function we can adjust the
	// overall colour of the terrain
	dbSetTerrainLight ( 1, 1.0f, -0.25f, 0.0f, 1.0f, 1.0f, 0.78f, 0.5f );

	// in this call we're telling the terrain that its diffuse texture
	// will come from image 1 and its detail texture will come from
	// image 2
	dbSetTerrainTexture ( 1, 1, 2 );

	// once we have set all properties of the terrain we can build it,
	// at this point it gets created and added into your world
	dbBuildTerrain ( 1 );

	// with the terrain in place we can now load a skybox
	dbLoadObject ( "skybox2.x", 2 );

	// we dont need it to respond to light so switch light off
	dbSetObjectLight ( 2, 0 );

	// make the skybox much larger
	dbScaleObject ( 2, 30000, 30000, 30000 );
	
	// position the camera
	dbPositionCamera ( 385, 200, 100 );

	// adjust texture properties of sky box
	dbSetObjectTexture ( 2, 3, 1 );

	float fCameraAngleX = 0.0f;
	float fCameraAngleY = 0.0f;

	// create a sphere
	dbMakeObjectCube(5,1);
	// reposition the sphere so it follow the camera
	dbPositionObject(5,385,200,200);
	dbScaleObject(5,100,100,100);

	// our main loop
	while ( LoopGDK ( ) )
	{
		// let the user move the camera around with the arrow keys
		// dbControlCameraUsingArrowKeys ( 0, 2.0f, 2.0f );

		// find the ground height of the terrain
		float fHeight = dbGetTerrainGroundHeight ( 1, dbCameraPositionX ( ), dbCameraPositionZ ( ) );

		// create a rotation axis based on Key Press
        fCameraAngleX = dbWrapValue ( fCameraAngleX + dbUpKey ( ) * 0.4f );
		fCameraAngleX = dbWrapValue ( fCameraAngleX - dbDownKey ( ) * 0.4f);
		fCameraAngleY = dbWrapValue ( fCameraAngleY + dbRightKey ( ) * 0.4f );
		fCameraAngleY = dbWrapValue ( fCameraAngleY - dbLeftKey ( ) * 0.4f );

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

		// W state
		if (dbKeyState(17))
		{
			
			dbRotateObject(5,(fCameraAngleX),(fCameraAngleY),dbObjectPositionZ(5));
			dbPositionObject( 5, dbNewXValue( dbObjectPositionX( 5 ), dbObjectAngleY( 5 ), .4 ), dbNewYValue( dbObjectPositionY( 5 ), dbObjectAngleY( 5 ), .4), dbNewZValue( dbObjectPositionZ( 5 ), dbObjectAngleY( 5 ), .4 ));
		}

		// CAMERA CODE
		//dbSetCameraToFollow( dbObjectPositionX( 5 ), dbObjectPositionY( 5 ), dbObjectPositionZ( 5 ), dbObjectAngleY( 5 ), 0, 8, 100, 0 );
		//dbPointCamera(dbObjectPositionX( 5 ), dbObjectPositionY( 5 ), dbObjectPositionZ( 5 ));

		// reposition the camera so it is directly above the ground
		dbPositionCamera ( dbObjectPositionX (5),dbObjectPositionY (5), dbObjectPositionZ (5) );

		// update the terrain
		dbUpdateTerrain ( );

		// update the screen
		dbSync ( );
	}

	// return back to windows
	return;
}