dtedframesubframeinfo.java

openmap java写的开源数字地图程序. 用applet实现,可以像google map 那样放大缩小地图.

// **********************************************************************
// 
// <copyright>
// 
//  BBN Technologies
//  10 Moulton Street
//  Cambridge, MA 02138
//  [phone]
// 
//  Copyright (C) BBNT Solutions LLC. All rights reserved.
// 
// </copyright>
// **********************************************************************
// 
// $Source: /cvs/distapps/openmap/src/openmap/com/bbn/openmap/layer/dted/DTEDFrameSubframeInfo.java,v $
// $RCSfile: DTEDFrameSubframeInfo.java,v $
// $Revision: 1.2.2.1 $
// $Date: 2004/10/14 18:27:04 $
// $Author: dietrick $
// 
// **********************************************************************

package com.bbn.openmap.layer.dted;

import com.bbn.openmap.omGraphics.OMRasterObject;

/**
 * The DTEDFrameSubframeInfo contains information about how a subframe
 * image ought to be presented. It contains the view settings, and the
 * location of the subframe image.
 */
public class DTEDFrameSubframeInfo {
    /**
     * The type of shading to use in the image. DTEDFrameSubframe has
     * the different types of possibilities.
     */
    public int viewType;
    /**
     * The distance (elevation) range that each color section of the
     * band viewtype represents.
     */
    public int bandHeight;
    /** The DTED level of the data. */
    public int dtedLevel;
    /**
     * A user adjusted setting for contrast for the slope shading.
     * Some areas of the earth require different settings, for more or
     * less detail.
     */
    public int slopeAdjust;
    /**
     * The degrees/pixel of the image in the x direction, derived from
     * the scale of the projection.
     */
    public double xPixInterval;
    /**
     * The degrees/pixel of the image in the y direction, derived from
     * the scale of the projection.
     */
    public double yPixInterval;
    /**
     * x number of the subframe within the DTEDFrame, from the left
     * side of the frame (east).
     */
    public int subx;
    /**
     * y number of the subframe within the DTEDFrame, from the bottom
     * side of the frame (south).
     */
    public int suby;
    /** Longitude of the upper left corner of the subframe image. */
    public float lon;
    /** Latitude of the upper left corner of the subframe image. */
    public float lat;
    /** height of the subframe image. */
    public int height;
    /** Width of the subframe image. */
    public int width;
    /**
     * The colormodel of the images. Use
     * OMRasterObject.COLORMODEL_DIRECT (default) or
     * OMRasterObject.COLORMODEL_INDEXED
     */
    public int colorModel = OMRasterObject.COLORMODEL_DIRECT;

    public DTEDFrameSubframeInfo(int Vt, int Bh, int Dl, int Sa) {
        this(DTEDCacheHandler.SF_PIXEL_HW,
             DTEDCacheHandler.SF_PIXEL_HW,
             0.0f,
             0.0f,
             0,
             0,
             (double) 0.0,
             (double) 0.0,
             Vt,
             Bh,
             Dl,
             Sa);
    }

    public DTEDFrameSubframeInfo(int Height, int Width, float Lon, float Lat,
            int Subx, int Suby, double xpi, double ypi, int Vt, int Bh, int Dl,
            int Sa) {
        viewType = Vt;
        bandHeight = Bh;
        dtedLevel = Dl;
        slopeAdjust = Sa;
        xPixInterval = xpi;
        yPixInterval = ypi;
        subx = Subx;
        suby = Suby;
        lon = Lon;
        lat = Lat;
        height = Height;
        width = Width;
    }

    public DTEDFrameSubframeInfo makeClone() {
        return new DTEDFrameSubframeInfo(height, width, lon, lat, subx, suby, xPixInterval, yPixInterval, viewType, bandHeight, dtedLevel, slopeAdjust);
    }

    /**
     * A comparision test to test the drawing parameters, to figure
     * out if the presentation configuration has changed, and that the
     * pixel color values need to be recalculated.
     */
    public boolean equals(DTEDFrameSubframeInfo newInfo) {
        boolean result = true;
        if (viewType != newInfo.viewType)
            result = false;
        if (bandHeight != newInfo.bandHeight)
            result = false;
        if (dtedLevel != newInfo.dtedLevel)
            result = false;
        if (slopeAdjust != newInfo.slopeAdjust)
            result = false;
        if (xPixInterval != newInfo.xPixInterval)
            result = false;
        if (yPixInterval != newInfo.yPixInterval)
            result = false;
        return result;
    }
}