The dinsmore 1655 decribed in the book and the
hitechnic wouldn't be compatable. There really is
nothing more that I could give you that you can
siimply plug in.
You said earlier that you are getting a reading from
the dinsmore compass but are having trouble deriving
the angle.
The hitechic comnpass returns a reading from 0 - 99
north = 0,east = 25,south= 50 ,west = 75
The exmample I provided shows how you can convert
convert degrees (-180 to 180) to the compass 0 - 99.
good luck
From: made agus <[EMAIL PROTECTED]>
Re: Re: Ask Compass Programming
2006-05-19 06:53
Thank Mr David. I'll try it. May be work in my compass
sensor dinsmore 1655. I am beginner in java
programming. Would you like to tell me detail code ?.
Many thank.
--- David Levy <[EMAIL PROTECTED]> wrote:
>
> I'm using the one from HiTechnic.com.
>
> compassSensor = Sensor.S1;
>
compassSensor.setTypeAndMode(SensorConstants.SENSOR_TYPE_LIGHT,
> SensorConstants.SENSOR_MODE_PCT);
> compassSensor.activate();
>
> compassSensor.readValue() returns a value from 0 -
> 99.
> compassAngle -
> north = 0,east = 25,south= 50 ,west = 75
> angleInDegrees-
> 0 = north ( pointing to right on x-axis)
> 90 = east ( pointing up on y axis)
> -90 = west
> 180 = south
>
>
>
> Negotiate coordinate: say (100,100)
>
> public void negotiatePoint(int anX, int anY) {
> rotSensor.setPreviousValue(0);
>
> // Determine relative points
> int x1 = anX - getCurrentX();
> int y1 = anY - getCurrentY();
>
> // Calculate angle to go to:
> setAngleInRads((double)Math.atan2(y1,x1));
>
> // Calculate distance to travel:
> if(y1 != 0) {
> distanceToTravel =
> y1/(float)Math.sin(getAngleInRads());
> }
> else
> {
> distanceToTravel =
> x1/(float)Math.cos(getAngleInRads());
> }
>
> }
>
>
>
> private void setAngleInRads(double anAngleInRads) {
>
> angleInRads = anAngleInRads;
> // Convert angle from rads to degrees:
> double angleInDegrees =
> (float)Math.toDegrees(anAngleInRads);
>
> // convert degrees (-180 to 180) to compass 0 - 99
>
> if (angleInDegrees < 0) {
> compassAngle = (angleInDegrees + 360) / 3.6;
> }
> else
> {
> compassAngle = (angleInDegrees) / 3.6;
> }
> }
>
>
>
>
> >>From: made agus <[EMAIL PROTECTED]>
> >> 2006-05-16 21:38
>
> >>I was try Navigation Lego with compass sensor
> pewatron
> >>6100/dinsmore 1655. I am successfull try read the
> >>sensor (from Core Lego Mindstorms book by Brian
> >>Bagnall). But i have a problem when try get the
> angle
> >>(CompassSensor.java). Any can help me ?. Many
> thank.
>
> >>Regards,
> >>Agoes
>
>
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