FrontLEDCommand.java

package se.nicklasgavelin.sphero.command;

import se.nicklasgavelin.util.Value;

/**
 * A command to modify the brightness of the front LED on the Sphero robot.
 * The brightness must be set to 0-1
 * 
 * @author Nicklas Gavelin, nicklas.gavelin@gmail.com, Luleå University of Technology
 */
public class FrontLEDCommand extends CommandMessage
{
	private float brightness = 0;

	/**
	 * Create a front LED command to modify the brightness of the LED on
	 * the Sphero robot
	 * 
	 * @param brightness The new brightness
	 */
	public FrontLEDCommand( float brightness )
	{
		super( COMMAND_MESSAGE_TYPE.FRONT_LED_OUTPUT );
		this.brightness = (float) Value.clamp( brightness, 0.0D, 1.0D );
	}

	/**
	 * Returns the front LED brightness set in the command
	 * 
	 * @return The brightness value
	 */
	public float getBrightness()
	{
		return this.brightness;
	}

	/**
	 * Update the brightness for LED in the command
	 * 
	 * @param brightness The new brightness
	 */
	public void setBrightness( float brightness )
	{
		this.brightness = brightness;
	}

	@Override
	public byte[] getPacketData()
	{
		byte[] data = new byte[ 1 ];
		data[0] = (byte) (int) ( 255.0D * this.brightness );

		return data;
	}
}