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--  Function......... : updateWeapon
--  Author........... : 
--  Description...... : 
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function FPSCamera.updateWeapon ( )
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    local w = this.hWeapon ( )
	
    if ( w ~= nil )
    then
        local t  = application.getTotalFrameTime ( )
        local dt = application.getLastFrameTime  ( )
        local o  = this.getObject  ( )
        
        --
        --
        local curWeaponBackFactor = this.nCurWeaponBackFactor ( )
        local dstWeaponBackFactor = this.nDstWeaponBackFactor ( )
        
        if ( dstWeaponBackFactor > 0 )
        then
            this.nDstWeaponBackFactor ( dstWeaponBackFactor - dt )
        end
        if ( curWeaponBackFactor ~= dstWeaponBackFactor )
        then
            this.nCurWeaponBackFactor ( math.interpolate ( curWeaponBackFactor, dstWeaponBackFactor, 10 * dt ) )
        end

        
        --
        --
        local oTx, oTy, oTz = object.getTranslation ( o, object.kGlobalSpace )
        local oRx, oRy, oRz = object.getRotation    ( o, object.kGlobalSpace )
        local oXx, oXy, oXz = object.getXAxis ( o, object.kGlobalSpace )
        local oYx, oYy, oYz = object.getYAxis ( o, object.kGlobalSpace )
        local oZx, oZy, oZz = object.getZAxis ( o, object.kGlobalSpace )

        oYx, oYy, oYz = math.vectorScale    ( oYx, oYy, oYz, 0.30 + 0.02 * math.sin ( t * 45 ) )
        oTx, oTy, oTz = math.vectorSubtract ( oTx, oTy, oTz, oYx, oYy, oYz )
        oXx, oXy, oXz = math.vectorScale    ( oXx, oXy, oXz, 0.25 + 0.02 * math.sin ( t * 30 ) )
        oTx, oTy, oTz = math.vectorAdd      ( oTx, oTy, oTz, oXx, oXy, oXz )
        oZx, oZy, oZz = math.vectorScale    ( oZx, oZy, oZz, 0.4 + 0.02 * math.sin ( t * 55 ) - 0.15 * curWeaponBackFactor )
        oTx, oTy, oTz = math.vectorSubtract ( oTx, oTy, oTz, oZx, oZy, oZz )
        
        object.setTranslation ( w, oTx, oTy, oTz, object.kGlobalSpace )
        object.setRotation    ( w, oRx, oRy, oRz, object.kGlobalSpace )
        object.rotate         ( w, 3 * curWeaponBackFactor, 0, 0, object.kLocalSpace )
    end
	
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end
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