// Dark GDK - The Game Creators - www.thegamecreators.com

// include Dark GDK header file
#include "DarkGDK.h"

// main entry point for program
void DarkGDK ( void )
{
	// switch  to media directory
	dbSetDir ( "media\\" );

	// set sync rate
	dbSyncOn   ( );
	dbSyncRate ( 0 );

	// turn backdrop off
	dbBackdropOff ( );

	// switch light normalization on
	dbSetNormalizationOn ( );

	// load our character / statue model
	dbLoadObject ( "models\\statue.x", 1 );
	dbLoadImage  ( "models\\bumpmap.jpg", 1 );

	// position it
	dbXRotateObject     ( 1, 270.0f );
	dbFixObjectPivot    ( 1 );
	dbSetLightMappingOn ( 1, 1 );
	dbSetObjectSpecular ( 1, 0 );
	dbRotateObject      ( 1, 0, 0, 0 );

	// load our world
	dbLoadObject        ( "world\\room.x", 2 );
	dbXRotateObject     ( 2, 270 );
	dbFixObjectPivot    ( 2 );
	dbSetObjectSpecular ( 2, 0 );
	dbRotateObject      ( 2, 0, 0, 0 );

	// hide defaul light
	dbHideLight ( 0 );

	// create lights and spheres
	for ( int i = 1; i < 8; i++ )
	{
		dbMakeLight     ( i );
		dbSetPointLight ( i, 0, 0, 0 );
		dbSetLightRange ( i, 2000 );

		dbMakeObjectSphere ( 2 + i, 50 );
		dbGhostObjectOn    ( 2 + i );

		if ( i > 1 )
		{
			dbHideLight  ( i );
			dbHideObject ( 2 + i );
		}
	}

	// declare some variables
	int keypress = 0;
	float a=0, b=0, c=0;

	// main loop
	while ( LoopGDK ( ) )
	{
		// quit on escape key
		if ( dbEscapeKey ( ) )
			return;

		// use variables to move the lights
		a = dbWrapValue ( a + 0.5f );
		b = dbWrapValue ( b + 0.2f );
		c = dbWrapValue ( c + 0.05f );
		float x = dbCos ( c ) * 250.0f;
		float z = dbSin ( c ) * 300.0f;

		// position light, camera and point camera
		dbPositionLight  ( 0, x, 150, z );
		dbPositionCamera ( x, 100, z );
		dbPointCamera    ( 0, 150, 0 );
		
		// move lights
		for ( int i = 1; i < 8; i++ )
		{
			float x = dbCos ( a + ( i * 85 ) ) * 300.0f;
			float z = dbSin ( a + ( i * 85 ) ) * 150.0f;

			dbPositionLight  ( i, x, 100 + ( dbSin ( b ) * 100 ), z );
			dbPositionObject ( 2 + i, x, 100 + ( dbSin ( b ) * 100 ), z );
		}

		float leva  = 0.0f;
		leva  = dbWrapValue ( leva + 0.01f );
		float level = ( float ) cos ( leva );
		
		int i;

		// colour lights
		for ( i = 1; i < 8; i++ )
		{
			float col = 127.0f + ( 127.0f * level );
			float rev = col *- 1;

			if ( i == 1 ) dbColorLight ( i, ( int ) col, ( int ) rev, ( int ) rev );
			if ( i == 2 ) dbColorLight ( i, 128, ( int ) col, 128 );
			if ( i == 3 ) dbColorLight ( i, 255, 255, ( int ) col * 2 );
			if ( i == 4 ) dbColorLight ( i, ( int ) col, ( int ) rev, ( int ) col );
			if ( i == 5 ) dbColorLight ( i, ( int ) col, ( int ) col, ( int ) col );
			if ( i == 6 ) dbColorLight ( i, 500, 500, 500 );
			if ( i == 7 ) dbColorLight ( i, ( int ) rev * 3,( int ) rev * 3, ( int ) rev * 3 );
		}
		
		// when a key has been pressed show or hide a light
		char* szKey = dbInKey ( );

		if ( strspn ( szKey, "1234567" ) )
		{
			if ( keypress == 0 )
			{
				keypress = 1;

				int i = 1 + ( dbAsc ( szKey ) - dbAsc ( "1" ) );

				if ( dbLightVisible ( i ) )
				{
					dbHideLight  ( i );
					dbHideObject ( i + 2 );
				}
				else
				{
					dbShowLight  ( i );
					dbShowObject ( i + 2 );
				}
			}
		}
		else
			keypress = 0;

		// display information
		dbText ( 20, dbScreenHeight ( ) - 40, "Press keys 1 - 7 to toggle lights" );

		// show frame rate
		char szFPS [ 256 ] = "";
		strcpy ( szFPS, "fps = " );
		strcat ( szFPS, dbStr ( dbScreenFPS ( ) ) );
		dbText ( dbScreenWidth ( ) - 20 - dbTextWidth ( szFPS ), dbScreenHeight ( ) - 40, szFPS );

		// update screen
		dbSync ( );
	}
}