Need help on addPoint syntax

[mag-immo]

Hi,
I would like to plot a simple graph in real time from two sensors values sent by an arduino based on the mouse position example.
My problem is that I don't understand the syntax of the example.
The code below works perfectly with the mouse position but when I try to change it with my values , I get
The function "addPoint()" expects parameters like : "addPoint(GPoint)"

public void setup(){
   plot1 = new GPlot(this);
   plot1.setPos(350, 150);
   plot1.setDim(700, 500);
   plot1.getTitle().setText("Effet tactile");
   plot1.getXAxis().getAxisLabel().setText("Déplacement (mm)");
   plot1.getYAxis().getAxisLabel().setText("Force (N)");
}
public void draw(){   
   plot1.addPoint(mouseX, -mouseY, "(" + str(mouseX) + " , " + str(mouseY) + ")");
}

Could you please help me ?

Regards,
Yves

[jagracar]

Hi Yves,

I tried your example and it works for me:

import grafica.*;

GPlot plot1;

public void setup() {
  size(900, 700);
  background(150);

  plot1 = new GPlot(this);
  plot1.setPos(10, 10);
  plot1.setDim(700, 500);
  plot1.getTitle().setText("Effet tactile");
  plot1.getXAxis().getAxisLabel().setText("Déplacement (mm)");
  plot1.getYAxis().getAxisLabel().setText("Force (N)");
}
public void draw() {   
  plot1.addPoint(mouseX, -mouseY, "(" + str(mouseX) + " , " + str(mouseY) + ")");
  // Also possible
  plot1.addPoint(mouseX, -mouseY);

  plot1.defaultDraw();
}

There are several addPoint methods in Grafica. You can see them listed here:

https://github.com/jagracar/grafica/blob/master/src/grafica/GPlot.java#L1928

[mag-immo]

Hi Javier,
Thank you for your answer
I tried using this method

public void addPoint(float x, float y)

It works but the program crashes at the start with this error ArrayIndexOutOfBoundsExeption : 1
Could you please take a look at my code ?

  import grafica.*;
  import processing.serial.*;    // Importing the serial library to communicate with the Arduino 
  Serial myPort;      // Initializing a vairable named 'myPort' for serial communication
  
  public GPlot plot1;
  public GPointsArray polygonPoints;
  
  String valeurs;
  String deplacement;
  String val_force ;
  String values;

public void setup(){
  
  size(1200, 800, JAVA2D);
  
  myPort  =  new Serial (this, "COM4",  9600); // Set the com port and the baud rate according to the Arduino IDE

  myPort.bufferUntil('\n');
   
  plot1 = new GPlot(this);
  plot1.setPos(350, 150);
  plot1.setDim(700, 500);
  plot1.getTitle().setText("Effet tactile");
  plot1.getXAxis().getAxisLabel().setText("Déplacement (mm)");
  plot1.getYAxis().getAxisLabel().setText("Force (N)");
}

public void draw(){    
    valeurs = myPort.readStringUntil('\n');   
    String values[] = split(valeurs,' ');   
    if (values.length > 0) {
      deplacement = values[0];
      val_force = values[1];
    }    
   
   plot1.addPoint(float(deplacement),float( val_force));

   // Reset the points if the user pressed the space bar
   if (keyPressed && key == ' ') {
    plot1.setPoints(new GPointsArray());
   }
  
  plot1.beginDraw();
  plot1.drawBackground();
  plot1.drawBox();
  plot1.drawXAxis();
  plot1.drawYAxis();
  plot1.drawTitle();
  plot1.drawGridLines(GPlot.BOTH);
  plot1.drawLines();
  plot1.drawPoints();
  plot1.endDraw();
}

Thank you
Regards,
Yves