Subject:
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Re: OO programing in RCX
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Tue, 11 Jan 2000 17:37:20 GMT
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Viewed:
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1537 times
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Hi Eric,
Yes, I believe you could create a sensor object on the VB side and write your
code thinking in terms of a sensor object. Here's one way:
=-=-=-= BEGIN SAMPLE CODE =-=-=-=
Private m_SensorNumber As Integer
Private m_SensorType As Integer
Private m_SensorMode As Integer
Private m_SensorAngle As Ineteger
Private m_Spirit As Spirit
Public Enum SensorNumbers
Sensor1 = 0
Sensor2 = 0
Sensor3 = 0
End Enum
Public Enum SensorTypes
None = 0
Switch = 1
Temperature = 2
Light = 3
Angle = 4
End Enum
Public Enum SensorModes
Raw = 0
Bool = 1
TransistionCounter = 2
PeriodicCounter = 3
Percent = 4
Celsius
Farenheit
Angle
End Enum
'Set the class variables to reasonable defaults.
Private Sub Sensor_Initialize()
m_Spirit = Nothing
m_SensorNumber = Sensor1
m_SensorType = Switch
m_SensorMode = Raw
m_SensorAngle = 0
End Sub
'Store the Spirit.ocx control to be used by the sensor.
Public Sub SetSpirit(inSirit As Spirit)
m_Spirit = inSpirit
End Sub
'Set the sensor number, type, and mode.
Public Sub SetupSensor(inNumber As Integer, inType As Integer, inMode As
Integer, inAngle As Integer)
m_SensorNumber = inNumber
m_SensorType = inType
m_SensorMode = inMode
m_SensorAngle = inAngle
If Not m_Spirit Is Nothing Then
m_Spirit.SetSensorType m_SensorNumber, m_SensorType
m_Spirit.SetSensorMode , m_SensorNumber, m_SensorMode, m_SensorAngle
End If
End Sub
Public Sub Clear()
If Not m_Spirit Is Nothing Then
m_Spirit.ClearSensorValue m_SensorNumber
End If
End Sub
Public Property Get SensorNumber() As Integer
SensorNumber = m_SensorNumber
End Property
Public Property Get SensorType() As Integer
SensorType = m_SensorType
End Property
Public Property Get SensorMode() As Integer
SensorMode = m_SensorMode
End Property
Public Property Get SensorAngle() As Integer
SensorAngle = m_SensorAngle
End Property
=-=-=-= END SAMPLE CODE =-=-=-=
You create a sensor object like this:
=-=-=-= BEGIN EXAMPLE OF USE =-=-=-=
Dim snsrLightSensor1 As New Sensor
snsrLightSensor1.SetSpirit MySiritObj
snsrLightSensor1.SetupSensor SensorNumbers.Sensor1, SensorTypes.Light,
SensorModes.Raw, 0
=-=-=-= END EXAMPLE OF USE =-=-=-=
This is a quick and dirty example of a sensor class. You could get more refined
and create light sensor classes, touch sensor classes, etc. The classes could
have specialized methods that apply to that type of sensor. For example, on a
light sensor class, you could have a method that tells you if the sensor is
detecting a certain color. For example:
=-=-=-= BEGIN POSSIBLE EXTENTION =-=-=-=
Public Sub IfSeeColor(inColor As Integer)
Dim iColor As Integer
If inColor = Green Then
iColor = 50 'hypothetical green value
ElseIf inColor = Blue Then
iColor = 70 'hypothetical green value
ElseIf inColor = Red Then
iColor = 40 'hypothetical green value
End If
m_Spirit.If SENSOR, m_SensorNumber, EQUALS, CONSTANT, iColor
End Sub
=-=-=-= END POSSIBLE EXTENTION =-=-=-=
The code calculates a light sensor value based on the passed parameter and
starts an if statement in the RCX to look for that color. You'd use the code
like this:
=-=-=-= BEGIN EXAMPLE OF USE =-=-=-=
Dim snsrLightSensor1 As New LightSensor
snsrLightSensor1.SetSpirit MySiritObj
snsrLightSensor1.SetupSensor SensorNumbers.Sensor1, SensorModes.Raw, 0
snsrLightSensor1.IfSeeColor Green Then
'Code to handle green color goes here.
m_Spirit.EndIf
=-=-=-= END EXAMPLE OF USE =-=-=-=
Now this code is simplified, you'd need to add a calibration routine to handle
different lighting, and so on. But it gets the idea across.
Yet another advantage to the object-oriented method is you can encapsulate
specialized knowledge of you code in the class, freeing the programmer from
having to learn, remember, and use that knowledge. For example, in my
SoftBricks prototype I made four mapping functions RCX subroutines. This was
because they were too large to use as inline code. Now if you're not using
mapping, you can rip those subroutines out because you won't need them. This
saves a significant amount of RCX program memory. But the programmer has too
KNOW they can be ripped out, know what subroutines to rip out, and remember to
put them back in the right place if he later adds mapping. With the OO method,
all that knowledge is in the mapping classes, so if you're not using mapping,
those subroutines are not loaded to the RCX. If you later add mapping, those
subroutines get loaded. It makes the library easier to use, smaller on the RCX
side, and removes a big potential for coding errors.
David Leeper (likes OO)
In lugnet.robotics.rcx, Eric Huang writes:
> What I mean is to think the RCX in OO. For example, I can add a sensor
> object in my programming code when I plug a sensor into my RCX. I can make
> the sensor object to interface with the RCX object in the OO manner. Is that
> possible?
> I learned some control algorithm is object oriented. But I have no idea to
> apply it to RCX. Any comments?
>
> fun,
> Eric
> ----- Original Message -----
> From: Matthew Miller <mattdm@mattdm.org>
> To: <lugnet.robotics.rcx@lugnet.com>
> Sent: Tuesday, January 11, 2000 12:43 AM
> Subject: Re: OO programing in RCX
>
>
> > David Leeper <david.leeper@destiny.com> wrote:
> > > There always Visual Basic. I'm currently building a few ActiveX controls • which
> > > sit on top of Spirit. So far its working nicely and is a big improvement • over
> > > the non-class method of VB coding I used in my original prototype.
> >
> > I'm curious -- are you making it so you can think about your RCX program • in
> > OO terms, or just the VB program that sends opcodes?
> >
> > --
> > Matthew Miller ---> • mattdm@mattdm.org
> > Quotes 'R' Us ---> • http://quotes-r-us.org/
> >
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Message has 1 Reply:
 | | Re: OO programing in RCX
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| Thank you, David. Your gode is great! I learned a lot from your quick example, though I prefer Java more. I will encapsulate RCX commands in some utility objects and use them in more higher level objects. What I focus now is make a RF/IR adapter to (...) (25 years ago, 12-Jan-00, to lugnet.robotics.rcx)
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Message is in Reply To:
| | Re: OO programing in RCX
|
| What I mean is to think the RCX in OO. For example, I can add a sensor object in my programming code when I plug a sensor into my RCX. I can make the sensor object to interface with the RCX object in the OO manner. Is that possible? I learned some (...) (25 years ago, 11-Jan-00, to lugnet.robotics.rcx)
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