Class SurfacePlot

src/org/opensourcephysics/display2d/SurfacePlot.java:34–1533

SurfacePlot draws a 3D surface of a scalar field. Surfaceplot uses code from the Surface Plotter package by Yanto Suryono. @author Wolfgang Christian and Yanto Suryono @version 1.0

 * @version 1.0
 */
public class SurfacePlot implements Plot2D, False3D {
  protected boolean visible = true;
  protected DecimalFormat labelFormat = org.opensourcephysics.numerics.Util.newDecimalFormat("0.00"); //$NON-NLS-1$
  private static final int TOP = 0;
  private static final int CENTER = 1;
  //   // for splitting polygons
  //   private static final int UPPER = 1;
  //   private static final int COINCIDE = 0;
  //   private static final int LOWER = -1;

  /** Field INIT_CALC_DIV */
  public static final int INIT_CALC_DIV = 33;

  /** Field INIT_DISP_DIV */
  public static final int INIT_DISP_DIV = INIT_CALC_DIV;
  protected GridData griddata;
  private int calc_divisions = INIT_CALC_DIV;                      // number of divisions to calculate
  private int disp_divisions = INIT_DISP_DIV;                      // number of divisions to calculate
  private int plot_mode = ColorMapper.SPECTRUM;
  private boolean isBoxed, isMesh, isScaleBox, isDisplayXY, isDisplayZ, isDisplayGrids;
  private double zmin = -2, zmax = 2;
  private boolean autoscaleZ = true;
  private boolean symmetricZ = false;
  private double color_factor;
  private Point projection;
  private SurfaceVertex cop;                                       // center of projection
  private SurfaceVertex[] vertexArray;                             // vertices array
  private final SurfaceVertex values1[] = new SurfaceVertex[4];
  //private final SurfaceVertex values2[] = new SurfaceVertex[4];
  private Color line_color = Color.black;
  private int factor_x, factor_y;                                  // conversion factors
  private int t_x, t_y, t_z;                                       // determines ticks density
  //private boolean mouseDown = false;
  private int click_x, click_y;                                    // previous mouse cursor position
  private boolean invalidProjection = true;
  private int iwidth = 0, iheight = 0;                             // the width and height of the last drawing operation
  private double xmin, xmax, ymin, ymax;
  private int ampIndex = 0;                                        // amplitude index
  // the following are needed by the SurfaceVertex
  SurfacePlotProjector projector;                                  // the projector
  double zminV, zmaxV, zfactorV;
  int master_project_indexV = 0;                                   // over 4 billion times to reset
  private JFrame legendFrame;
  String xLabel = "x", yLabel = "y", zLabel = "z";                 //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
  ZExpansion zMap;

  /**
   * SurfacePlot constructor.
   */
  public SurfacePlot() {
    this(null);
  }

  /**
   * SurfacePlot constructor.
   * @param _griddata
   */
  public SurfacePlot(GridData _griddata) {