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gwoptics rolling graph of accelerometer

[4 Replies]
- 06-Jan-2012 12:52 PM
- Forum: Contributed Library Questions
I am trying to create a live graph of accelerometer readings using the gwoptics library. The problem is I am not sure the best way pass the serial readings to the gwoptics eq class. The only way I could get it to work, is to read the serial string inside the eq class definition. However this seems very sloppy, ideally I would like to read the serial string in draw(), split it up and pass each axis variable to a respective eq class, I just can't get it to work. I modified the example code provided with the library. The the "working" code is below. I am pretty new to programming and processing so any help at all is appreciated, thanks.
import processing.serial.*;

import org.gwoptics.graphics.graph2D.Graph2D;

import org.gwoptics.graphics.graph2D.traces.ILine2DEquation;

import org.gwoptics.graphics.graph2D.traces.RollingLine2DTrace;

float inByteX;

float inByteY;

float inByteZ;

String xAxis;

String yAxis;

String zAxis;

String accelReadings;

String splitReadings[];

Serial myPort;

RollingLine2DTrace r,r2,r3;

Graph2D g;

void setup(){

size(600,300);

println(Serial.list());

myPort = new Serial(this, Serial.list()[0], 57600);

r = new RollingLine2DTrace(new eq(),25,.025f);

r.setTraceColour(0, 255, 0);

g = new Graph2D(this, 400, 200, false);

g.setYAxisMax(600);

g.addTrace(r);

g.position.y = 50;

g.position.x = 100;

g.setYAxisTickSpacing(100);

g.setXAxisMax(5f);

}

void draw(){

print(xAxis);

print(",");

print(yAxis);

print(",");

println(zAxis);

background(255);

g.draw();

}

class eq implements ILine2DEquation{

public double computePoint(double x,int pos) {

accelReadings = myPort.readStringUntil('\n');

splitReadings = splitTokens(accelReadings, ",");

xAxis = splitReadings[0];

yAxis = splitReadings[1];

zAxis = splitReadings[2];

inByteX = float(xAxis);

return inByteX;

}

}

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