//**********************************************************************************************
//        (C) Copyright 2002 by Dipl. Phys. Joerg Plewe, HARDCODE Development
//        All rights reserved. Copying, modification,
//        distribution or publication without the prior written
//        consent of the author is prohibited.
//
//    Created on 22. Februar 2002, 13:21
//**********************************************************************************************
package de.hardcode.jxinput.j3d;

import javax.media.j3d.InputDevice;
import javax.media.j3d.Sensor;
import javax.media.j3d.SensorRead;
import javax.vecmath.Vector3d;
import javax.media.j3d.Transform3D;
import de.hardcode.jxinput.JXInputManager;


/**
 * Implementation of Java3D's InputDevice
 *
 * @author Herkules
 */
public class J3DInputDevice 
    implements InputDevice
{
    private Vector3d mPosition = new Vector3d();
    private Transform3D mNewTransform = new Transform3D();

    private Transform3D mRotTransX = new Transform3D();
    private Transform3D mRotTransY = new Transform3D();
    private Transform3D mRotTransZ = new Transform3D();

    private Vector3d mInitPos = new Vector3d( 0.0, 0.0, 0.0 );

    private Sensor mSensor = new Sensor( this );
    private SensorRead mSensorRead = new SensorRead();
    
    private DeviceConfiguration mConfig;
    
    /**
     * Creates a new instance of J3DInputDevice.
     */
    public J3DInputDevice( DeviceConfiguration config )
    {
        mConfig = config;
        setNominalPositionAndOrientation();
    }
    
    
    public void close()
    {
        // Intentionally empty
    }
    
    
    /**
     * Retrieve processing mode.
     * For this device, it always is NON_BLOCKING.
     */
    public int getProcessingMode()
    {
        return InputDevice.NON_BLOCKING;
    }
    
    
    /**
     * Don't care for the index, I only support one sensor.
     * And I deliver that.
     */
    public Sensor getSensor( int param )
    {
        return mSensor;
    }
    

    /**
     * Tell the world about the only one sensor I support.
     */
    public int getSensorCount()
    {
        return 1;
    }
    

    /**
     * Well - initialize!
     * Nothing to do here.
     */
    public boolean initialize()
    {
        return true;
    }
    
    
    /**
     * The main update method.
     */
    public void pollAndProcessInput()
    {
        JXInputManager.updateFeatures();        
        
        mSensorRead.setTime( JXInputManager.getLastUpdateTime() );

        mRotTransX.rotX( mConfig.getRotational( DeviceConfiguration.AXIS_X ) );
        mRotTransY.rotY( mConfig.getRotational( DeviceConfiguration.AXIS_Y ) );
        mRotTransZ.rotZ( mConfig.getRotational( DeviceConfiguration.AXIS_Z ) );

        mPosition.set( 
                    mConfig.getTranslational( DeviceConfiguration.AXIS_X ),
                    mConfig.getTranslational( DeviceConfiguration.AXIS_Y ),
                    mConfig.getTranslational( DeviceConfiguration.AXIS_Z )
                    );

        mNewTransform.set( mPosition );
        
        mNewTransform.mul( mRotTransX );  
        mNewTransform.mul( mRotTransY );
        mNewTransform.mul( mRotTransZ );

        mSensorRead.set( mNewTransform );
        mSensor.setNextSensorRead( mSensorRead );
    }
    
    
    /**
     * Not called by current j3d implementation.
     */
    public void processStreamInput()
    {
        // Intentionally empty
    }
    
    
    /**
     * Reset state.
     */
    public void setNominalPositionAndOrientation()
    {
        mSensorRead.setTime( JXInputManager.getLastUpdateTime() );
 
        mRotTransX.rotX( 0.0 );
        mRotTransY.rotY( 0.0 );
        mRotTransZ.rotZ( 0.0 );
 
        mPosition.set( mInitPos );
        
        mNewTransform.set( mPosition );
 
        mNewTransform.mul( mRotTransX );  
        mNewTransform.mul( mRotTransY );
        mNewTransform.mul( mRotTransZ );
 
        mSensorRead.set( mNewTransform );
        mSensor.setNextSensorRead( mSensorRead );
        
    }
    
    
    /**
     * Set the processing mode.
     * Only NON_BLOCKING is allowed!
     */
    public void setProcessingMode(int param)
    {
        if ( param != InputDevice.NON_BLOCKING )
            throw new IllegalArgumentException("Processing mode must be NON_BLOCKING");
            
    }
    
}