/** Initializes the animation. */
public void initialize() {
size = control.getInt("size");
Exy = new double[2][size][size];
maxwell = new Maxwell(size);
frame.setAll(Exy);
frame.setPreferredMinMax(0, Maxwell.dl * size, Maxwell.dl * size, 0);
plotField();
}
/** Plots the electric field using the arrays in the Maxwell object. */
void plotField() {
double[][][][] E = maxwell.E; // electric field
int mid = size / 2;
for (int i = 0; i < size; i++) {
for (int j = 0; j < size; j++) {
Exy[0][i][j] = E[i][j][mid][0]; // Ex
Exy[1][i][j] = E[i][j][mid][1]; // Ey
}
}
frame.setAll(Exy);
}