Basic Features of Mini GaussSense

Tutorials - GaussToys Developers

With GaussSense SDK for Processing, you can easily visualize the magnetic field on Mini GaussSense as well as the bipolar points (north and south), roll angle, and pitch angle of tilt.

In this tutorial, you will learn how to use the examples of GaussSense SDK to showcase the basic features of Mini GaussSense.

Open File > Examples… > Contributed Libraries > GaussSense SDK for Processing. You can see 9 examples in the Basics folder.

We are going through the first 5 examples here.

1. Draw Raw Data

Open e1_HelloGaussSense example, you can see a function called drawRawData2D . This function draws the magnetic field sensed by Mini GaussSense in 2D. Simply change the value of this.width and this.height to create images of the size you want.

gs.drawRawData2D(this.width, this.height);

2. Draw Smooth Data

In the second example e2_UpsampledData2d , you can use the drawUpsampledData2D function to draw a smoother magnetic field.

int upsampleFactor = 5; // Set between 1 ~ 10
gs.drawUpsampledData2D(this.width, this.height, upsampleFactor);


Before moving on, let's first take a look at the GData data type.
GData stores useful information about a polar point such as its position in the Processing window, intensity, pitch and roll angles, etc.

Get Methods Return Type Meaning
getX()floatGet the X coordinate on the display.
getY()floatGet the Y coordinate on the display.
getIntensity()intGet the magnetic field intensity. Unit: Gauss
getAngle()floatGet the angle of roll. Unit: Radian
getPitch()floatGet the pitch of tilt.
getPolarity()intGet the polarity of magnetic field. (0: North, 1: South)

3. Draw/Get Polar Points

Open e3_BasicBipolarPoints example. Draw different kinds of polar points with drawBasicBipolarPoints, drawBasicNorthPoint, and drawBasicSouthPoint. Also, simply get their information (without drawing) with getNorthPoint and getSouthPoint.

float thld = 15; // Unit: Gauss
float PointRadius = 15;

// Draw both polar points with intensity threshold
gs.drawBasicBipolarPoints(thld, PointRadius);
// Draw N/S polar point with intensity threshold
gs.drawBasicNorthPoint(thld, PointRadius);
gs.drawBasicSouthPoint(thld, PointRadius);

// Get information (position, intensity) of N/S polar point
GData pNorth = gs.getNorthPoint(thld);
GData pSouth = gs.getSouthPoint(thld);

4. Draw/Get Tiltable Polar Points

In example e4_TiltableBipolarPoints , we could visualize the tilt of each polar point. Use drawTiltableNorthPoint and drawTiltableSouthPoint functions to draw the tilting angle and intensity.

float lowThld = 15;
float highThld = 30;

// Select high and low thresholds to draw the tilt of N/S polar point
gs.drawTiltableNorthPoint(lowThld, highThld);
gs.drawTiltableSouthPoint(lowThld, highThld);

// Get information (position, intensity, angle, pitch) of N/S polar point
GData pTiltableNorth = gs.getTiltableNorthPoint(lowThld, highThld);
GData pTiltableSouth = gs.getTiltableSouthPoint(lowThld, highThld);

5. Draw/Get Bipolar Midpoint

When you put a magnet in a vertical position on the Mini GaussSense, both polar points can be detected by the Mini GaussSense. In our 5th example e5_RollAndTiltBipolarMidPoint , you can use drawBasicBipolarMidpoint function to draw the midpoint between both polar points, including its rotation and tilt.

float thld = 15;
float RectSize = 60;

// Draw midpoint with intensity threshold and size specified
gs.drawBasicBipolarMidpoint(thld, RectSize);

// Get information (position, intensity, angle, pitch) of midpoint
GData pBipolarMidpoint = gs.getBipolarMidpoint(thld);

Great! Let's explore the 2x2 Mini GaussSense now.
Or, start learning How to Use NFC Reader for GaussSense.

Get more advanced features of GaussSense SDK for Processing here: GaussSense SDK for Processing Documentation

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