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--  Function......... : updateSfx
--  Author........... : 
--  Description...... : 
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function Car.updateSfx ( )
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    local s = application.getCurrentUserScene ( )
    
    if ( s ~= nil )
    then
        local o1 = this.hWheelSfxBL ( )
        local o2 = this.hWheelSfxBR ( )
        local o3 = this.hWheelSfxFL ( )
        local o4 = this.hWheelSfxFR ( )

        if ( dynamics.getLinearSpeed ( this.getObject ( ) ) < 5
        and not this.bGoFront ( )
        --[[and not this.bGoBack  ( )]] )
        then
            sfx.pauseParticleEmitterAt ( o1, 0 )
            sfx.pauseParticleEmitterAt ( o2, 0 )
            sfx.pauseParticleEmitterAt ( o3, 0 )
            sfx.pauseParticleEmitterAt ( o4, 0 )
        else
        
            local x, y, z       = object.getTranslation ( o1, object.kGlobalSpace )
            local hit, dist, id = scene.getFirstHitCollider ( s, x, y + 1, z, 0, -1, 0, 1.1 )
            if ( hit ~= nil ) 
            then sfx.startParticleEmitterAt ( o1, 0 )
            else sfx.pauseParticleEmitterAt ( o1, 0 )
            end
            x, y, z       = object.getTranslation ( o2, object.kGlobalSpace )
            hit, dist, id = scene.getFirstHitCollider ( s, x, y + 1, z, 0, -1, 0, 1.1 )
            if ( hit ~= nil ) 
            then sfx.startParticleEmitterAt ( o2, 0 )
            else sfx.pauseParticleEmitterAt ( o2, 0 )
            end
            x, y, z       = object.getTranslation ( o3, object.kGlobalSpace )
            hit, dist, id = scene.getFirstHitCollider ( s, x, y + 1, z, 0, -1, 0, 1.1 )
            if ( hit ~= nil ) 
            then sfx.startParticleEmitterAt ( o3, 0 )
            else sfx.pauseParticleEmitterAt ( o3, 0 )
            end
            x, y, z       = object.getTranslation ( o4, object.kGlobalSpace )
            hit, dist, id = scene.getFirstHitCollider ( s, x, y + 1, z, 0, -1, 0, 1.1 )
            if ( hit ~= nil ) 
            then sfx.startParticleEmitterAt ( o4, 0 )
            else sfx.pauseParticleEmitterAt ( o4, 0 )
            end
        end
    end
    
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end
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