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How do I?: How do I make the particles start when mouse is down and stop when mouse is up?

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    • CommentAuthorJordan589
    • CommentTimeApr 29th 2011
     
    This is what I did to make the particles start when the mouse goes down:

    import org.flintparticles.common.actions.Age;
    import org.flintparticles.common.actions.Fade;
    import org.flintparticles.common.counters.Steady;
    import org.flintparticles.common.displayObjects.Line;
    import org.flintparticles.common.easing.Quadratic;
    import org.flintparticles.common.initializers.ColorInit;
    import org.flintparticles.common.initializers.Lifetime;
    import org.flintparticles.common.initializers.SharedImage;
    import org.flintparticles.twoD.actions.Accelerate;
    import org.flintparticles.twoD.actions.LinearDrag;
    import org.flintparticles.twoD.actions.Move;
    import org.flintparticles.twoD.activities.RotateEmitter;
    import org.flintparticles.twoD.emitters.Emitter2D;
    import org.flintparticles.twoD.initializers.Velocity;
    import org.flintparticles.twoD.renderers.BitmapRenderer;
    import org.flintparticles.twoD.zones.DiscSectorZone;

    var emitter:Emitter2D = new Emitter2D();

    emitter.counter = new Steady( 200 );

    emitter.addActivity( new RotateEmitter( -7 ) );

    emitter.addInitializer( new SharedImage( new Line( 3 ) ) );
    emitter.addInitializer( new ColorInit( 0xFFFFFF00, 0xFFFF6600 ) );
    emitter.addInitializer( new Velocity( new DiscSectorZone( new Point( 0, 0 ), 250, 170, 0, 0.2 ) ) );
    emitter.addInitializer( new Lifetime( 1.3 ) );

    emitter.addAction( new Age( Quadratic.easeIn ) );
    emitter.addAction( new Move() );
    emitter.addAction( new Fade() );
    emitter.addAction( new Accelerate( 0, 50 ) );
    emitter.addAction( new LinearDrag( 0.5 ) );

    var renderer:BitmapRenderer = new BitmapRenderer( new Rectangle( 0, 0, 500, 500 ) );
    renderer.addFilter( new BlurFilter( 2, 2, 1 ) );
    renderer.addFilter( new ColorMatrixFilter( [ 1,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0.97,0 ] ) );
    renderer.addEmitter( emitter );
    addChild( renderer );

    emitter.x = 260;
    emitter.y = 350;
    btn.addEventListener(MouseEvent.MOUSE_DOWN, emitter.start);

    When I run the code I get this error:
    1046: Type was not found or was not a compile-time constant: btn.
    I don't see what I did wrong and I also don't know how to stop the emitter.
    • CommentAuthorRichard
    • CommentTimeMay 3rd 2011
     
    It looks like btn isn't defined in your code.
    • CommentAuthorJordan589
    • CommentTimeMay 4th 2011
     
    What do you mean?
    • CommentAuthorRichard
    • CommentTimeMay 9th 2011
     
    The error message indicates that btn (in the last line of your code) doesn't exist.

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