import graphics3d.Graphics3DFramework;
import Graphics3D;
import Math;  // For using the sin function


// Variable to hold the coordinate system ID
int coord;

// Time counter (in update cycles)
int t = 0;


// Function called at the start of the program
void onStart ( int rendererID ) {

	// Optional screen size and background color settings
	setWindowSize( 800, 600 );
	setBackgroundColor( 0, 0, 0, 255 );


	//  Create a local coordinate system
	coord = newCoordinate( );

	// Mount it on the world coordinate system
	mountCoordinate( coord, rendererID );

	// Place a small axis model on the local coordinate system
	int axis1 = newAxisModel( 1.5, 1.5, 1.5 );
	mountModel( axis1, rendererID, coord );

	// Place a large axis model on the world coordinate system
	int axis2 = newAxisModel( 3.0, 3.0, 3.0 );
	mountModel( axis2, rendererID );
}


// Function called several times per second to update the display
void onUpdate ( int rendererID ) {

	// Move along a Lissajous curve and increment time
	setCoordinateLocation( coord, sin(0.1*t), sin(0.5*t), 0.0 );
	t++;
}