Storyboard

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ID:(742, 0)

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Para graficar un campo de vectores se visualiza a continuación:

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Descripción

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Primero se debe importar las clases necesarias

```

import org.opensourcephysics.display.DrawingFrame;

import org.opensourcephysics.display.DrawingPanel;

import org.opensourcephysics.display2d.VectorPlot;

```

Dentro del constructor primero se define el panel:

```

DrawingPanel drawingPanel = new DrawingPanel();

DrawingFrame frame = new DrawingFrame(drawingPanel);

drawingPanel.setSquareAspect(true);

```

luego la matriz de los datos a ser dibujada

```

int SIZE = 20;

double[][][] data = new double[2][SIZE][SIZE];

VectorPlot plot = new VectorPlot();

plot.setAll(data, -1, 1, -1, 1);

for(int i = 0;i < SIZE;i++){

double x = plot.indexToX(i);

for(int j = 0;j < SIZE;j++){

double y = plot.indexToY(j);

data[0][i][j] = -y;

data[1][i][j] = x;

}

}

plot.setAll(data);

drawingPanel.addDrawable(plot);

```

y finalmente colgada de la forma

```

frame.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);

frame.setVisible(true);

```

La fuente del constructor puede bajase de

[Vector.java](../programing/Vector.java)

ID:(7534, 0)

Descripción

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Código del constructor

```

import org.opensourcephysics.display.DrawingFrame;

import org.opensourcephysics.display.DrawingPanel;

import org.opensourcephysics.display2d.VectorPlot;

public class Vector {

Vector(){

DrawingPanel drawingPanel = new DrawingPanel();

DrawingFrame frame = new DrawingFrame(drawingPanel);

drawingPanel.setSquareAspect(true);

int SIZE = 20;

double[][][] data = new double[2][SIZE][SIZE];

VectorPlot plot = new VectorPlot();

plot.setAll(data, -1, 1, -1, 1);

for(int i = 0;i < SIZE;i++){

double x = plot.indexToX(i);

for(int j = 0;j < SIZE;j++){

double y = plot.indexToY(j);

data[0][i][j] = -y;

data[1][i][j] = x;

}

}

plot.setAll(data);

drawingPanel.addDrawable(plot);

frame.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);

frame.setVisible(true);

}

}

```

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