copteraudio.java

j2me源代码

/*
 *
 * Copyright (c) 2007, Sun Microsystems, Inc.
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *  * Neither the name of Sun Microsystems nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

import java.util.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class CopterAudio extends MIDlet implements CommandListener
{
	Display disp;
        CopterCanvas canvas;
        CopterAudioScene audio_sc;

        Timer timer;
        Mover mover;

//        ComLsnr cmLsnr;

        final int framesPerSecond = 5;
        final int timeToCrossScreen = 9; // in seconds

        final int halfSqrt2x1000 = 707; // sqrt(2)/2*1000

        Command cmdExit;
        Command cmdVolume;
        Command cmdPan;
        Command cmdDoppler;
        Command cmdLocation;
        Command cmdCopterSize;
        Command cmdOrientation;
        Command cmdDirect;
        Command cmdObstr;

        Form formVolume;
        CopterMeterGauge cmggVolume;

        Form formPan;
        CopterGauge cggPan;

        Form formDoppler;
        ChoiceGroup cgDoppler;
        CopterMeterGauge cmggExplicitVel;
        boolean _isDopplerVImplicit;
        
        Form formCopterSize;
        CopterMeterGauge cmggLength;
        CopterMeterGauge cmggWidth;
        CopterMeterGauge cmggHeight;

        Form formLocation;
        CopterMeterGauge cmggScale;
        CopterMeterGauge cmggAltitude;
        
        Form formOrientation;
        ChoiceGroup cgOrienPresets;
        
        Form formDirectivity;
        CopterMeterGauge cmggMinAngle;
        CopterMeterGauge cmggMaxAngle;
        CopterMeterGauge cmggRearLevel;
        
        CopterDistAttForm formDistAtt;
        
        Form formObstr;
        ChoiceGroup cgWall;
        
        public CopterStateListener stateLsnr;

        public CopterAudio() {
                disp = Display.getDisplay(this);
                mover = new Mover();
                timer = new Timer();

                initCommands();

                initCanvas();

                audio_sc = new CopterAudioScene( 
                    getStepScale( 30 ), // consider screen width to be 30 m
                    1000, // 1 metre altitude 
                    calcVelFactor( getStepScale( 30 ) ) 
                    // calculate the velocity factor (for Doppler Effect)
                    // from the scale set through the 1st parameter
                    );

                stateLsnr = new CopterStateListener();

                initVolumeForm();

                initPanForm();

                initLocationForm();

                initDopplerForm();
                
                initCopterSizeForm();
                
                initOrientForm();
                
                initDirectForm();
                
                formDistAtt = new CopterDistAttForm( 
                        "Distance Attenuation settings", cmdExit, this, 
                        stateLsnr, canvas, audio_sc );
                
                initObstrForm();
                
        }

	public void startApp() throws MIDletStateChangeException
        {
            disp.setCurrent( canvas );
            if (timer == null) {
                mover = new Mover();
                timer = new Timer();
            }
            timer.schedule( mover, getFramePeriod(), getFramePeriod() );
    	}
    
    	public void pauseApp()
        {
            timer.cancel();
            mover.cancel();
            timer = null;
            mover = null;
   	}

    	public void destroyApp(boolean unconditional) throws MIDletStateChangeException {

            cleanup();
    	}

        void initCommands()
        {
            cmdExit = new Command( "Exit", Command.EXIT, 1);
            cmdVolume = new Command( "Volume", Command.ITEM, 2);
            cmdPan = new Command( "Pan", Command.ITEM, 2);
            cmdDoppler = new Command ( "Doppler Effect", Command.ITEM, 2);
            cmdLocation = new Command ( "Location settings", Command.ITEM, 2);
            cmdCopterSize = new Command ( "Helicopter size", Command.ITEM, 2 );
            cmdOrientation = new Command ( "Spectator orientation", 
                    Command.ITEM, 2 );
            cmdDirect = new Command ( 
                    "Directivity of the sound",
                    Command.ITEM, 2);
            cmdObstr = new Command( 
                    "Sound obstruction settings", 
                    Command.ITEM, 2);
        }

        void initCanvas()
        {
            canvas = new CopterCanvas( getNStepsHorizontal() );
            canvas.addCommand( cmdExit );
            canvas.addCommand( cmdVolume );
            canvas.addCommand( cmdPan );
            canvas.addCommand( cmdLocation );
            canvas.addCommand( cmdDoppler );
            canvas.addCommand( cmdCopterSize );
            canvas.addCommand( cmdOrientation );
            canvas.addCommand( cmdDirect );
            canvas.addCommand( cmdObstr );
            canvas.setCommandListener( this );
        }

        Form getNewForm( String title )
        {
            Form f = new Form( title );
            f.addCommand( cmdExit );
            f.setItemStateListener( stateLsnr );
            f.setCommandListener( this );
            return f;
        }
        
        void initObstrForm()
        {
            formObstr = getNewForm( "Obstruction for the sound" );
            cgWall = new ChoiceGroup( null, Choice.EXCLUSIVE );
            cgWall.append(
                    "There is no obstruction", 
                    null );
            cgWall.append( "Obstruction is a single window", null );
            cgWall.append( "Obstruction is a double window", null );
            cgWall.append( "Obstruction is a thin door", null );
            cgWall.append( "Obstruction is a thick door", null );
            cgWall.append( "Obstruction is a wood wall", null );
            cgWall.append( "Obstruction is a brick wall", null );
            cgWall.append( "Obstruction is a stone wall", null );
            cgWall.append( "Obstruction is a curtain", null );
            cgWall.setSelectedIndex(0, true );
            formObstr.append( cgWall );

        }

        void initVolumeForm()
        {
            formVolume = getNewForm( null );

            cmggVolume = new CopterMeterGauge( formVolume, 0, 100, 
                                     audio_sc.getVolume(), 4, "Volume", "" );
        }

        void initPanForm()
        {
            formPan = getNewForm( null );
            cggPan = new CopterGauge( formPan, -100, 100, audio_sc.getPan(), 
                    8, "Pan" );

            StringItem siL = new StringItem( null, "Left" );
            StringItem siR = new StringItem( null, "Right" );

            formPan.append( siL );
            formPan.append( siR );

            formPan.insert( 2, new Spacer( formPan.getWidth() - 
                                      siL.getPreferredWidth() - 
                                      siR.getPreferredWidth(),
                                      siL.getMinimumHeight() ) );
            formPan.insert( 0, new Spacer( formPan.getWidth(),
                                           (formPan.getHeight() - 
                                           cggPan.getHeight() - 
                                           siR.getPreferredHeight()) / 2 ) );
        }

        void initLocationForm()
        {
            formLocation = getNewForm( "Location settings" );
            cmggScale = new CopterMeterGauge( formLocation, 
                                              30, 
                                              280, 
                                              getScale(), 
                                              10, 
                                              "Screen Width is", 
                                              "meters" );
            cmggAltitude = new CopterMeterGauge( formLocation,
                                                 0,
                                                 50,
                                                 getAltitude(),
                                                 2,
                                                 "Flight Altitude is",
                                                 "meters" );
        }

        void initDopplerForm()
        {
            _isDopplerVImplicit = true;

            formDoppler = getNewForm( "Doppler Effect settings" );
            cgDoppler = new ChoiceGroup( null, Choice.MULTIPLE );
            cgDoppler.append( "Doppler Effect is enabled", null );
            cgDoppler.setSelectedIndex( 0, audio_sc.isDopplerEnabled() );
            if( audio_sc.isDopplerEnabled() )
            {
                cgDoppler.append( "Velocity is calculated from the location", null );
                cgDoppler.setSelectedIndex( 1, _isDopplerVImplicit );
            }

            formDoppler.append( cgDoppler );

            cmggExplicitVel = new CopterMeterGauge( formDoppler,
                                                 1,
                                                 51,
                                                 getDiagVelocity(),
                                                 2,
                                                 "Linear speed of the Helicopter is", "mps" );
            if ( _isDopplerVImplicit ) {
                cmggExplicitVel.deleteFrom( formDoppler );
            }
        }
        
        void initCopterSizeForm()
        {
            formCopterSize = getNewForm( "Helicopter size settings"  );
            cmggLength = new CopterMeterGauge( formCopterSize, 
                    0, 25, audio_sc.getCopterLength(), 1, "Length", "m" );
            cmggWidth = new CopterMeterGauge( formCopterSize, 
                    0, 25, audio_sc.getCopterWidth(), 1, "Width", "m" );
            cmggHeight = new CopterMeterGauge( formCopterSize, 
                    0, 25, audio_sc.getCopterHeight(), 1, "Height", "m" );
        }
        
        void initOrientForm()
        {
            formOrientation = getNewForm( "Spectator 3D orientation" );
            cgOrienPresets = new ChoiceGroup( null, Choice.EXCLUSIVE );
            cgOrienPresets.append( "You're standing straight", null );
            cgOrienPresets.append( "You've fallen on your right side", null );
            cgOrienPresets.append( "You've fallen on your left side", null );