graphicwarehousesupport.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.

        //                             + ((pts == null) ? -1 : pts.length)
        //                             + "; Pts2: "
        //                             + ((pts_tcm == null) ? -1 : pts_tcm.length));
        //      }

        if (pts == null) {
            /* Completely eliminated poly */
            //          System.out.println("eliminated poly!");
            //          System.out.println("\tLL1: " + ll1);
            //          System.out.println("\tLL2: " + ll2);
            //          System.out.println("\tdpplat: " + dpplat);
            //          System.out.println("\tdpplon: " + dpplon);
            //          System.out.println("\tcoords: " + coords);
            return null;
        }

        SPoly py = new SPoly(pts, LineType.LT_Straight);
        return py;
    }

    /**
     * Clip raw lon/lats to the screen.
     * 
     * @return LLPoint[]
     */
    public LLPoint[] clipToScreen(CoordFloatString cfs, float north,
                                  float south, float east, float west,
                                  float dpplat, float dpplon) {
        LLPoint pts[] = new LLPoint[cfs.maxIndex()];
        int lpcount = 0, outcount = 0, elimscale = 0;
        float cfslls[] = cfs.vals;
        int cfstupsize = cfs.tsize;
        for (int i = 0; i < pts.length; i++) {
            float lllon = cfslls[cfstupsize * i];
            float lllat = cfslls[cfstupsize * i + 1];
            if ((lllat < south) || (lllat > north)
                    || ((west < east) && ((lllon < west) || (lllon > east)))
                    || ((west > east) && (lllon < west) && (lllon > east))) {
                outcount++;
                if (((lpcount > 1) && (outcount > 2))
                        || ((lpcount == 1) && (outcount > 1))) {
                    pts[lpcount] = new LLPoint(lllat, lllon); //overwrite
                                                              // previous
                    continue;
                }
            } else {
                outcount = 0;
            }
            if ((lpcount > 0)
                    && (i != (pts.length - 1))
                    && (java.lang.Math.abs(pts[lpcount - 1].lat - lllat) < dpplat)
                    && (java.lang.Math.abs(pts[lpcount - 1].lon - lllon) < dpplon)) {
                elimscale++;
                continue;
            }
            pts[lpcount++] = new LLPoint(lllat, lllon);
        }
        //only 1 point in poly, and it was out of bounds...
        if ((lpcount == 1) && (outcount > 0))
            lpcount = 0;

        if (lpcount != cfs.maxIndex()) {
            LLPoint newpts[] = new LLPoint[lpcount];
            System.arraycopy(pts, 0, newpts, 0, lpcount);
            pts = newpts;
            //System.out.println("Old(" + cfs.maxIndex() +
            //                   ")-area(" + elimarea+")-scale(" + elimscale +
            //                   ") = new(" + pts.length + ")");
        }
        if (pts.length == 0) {
            return null;
        }
        return pts;
    }

    /**
     *  
     */
    public LLPoint[] clipToScreen_tcm(CoordFloatString cfs, float north,
                                      float south, float east, float west,
                                      float dpplat, float dpplon) {

        if (west > east) {

        }

        if ((west < east)
                && com.bbn.openmap.MoreMath.approximately_equal(east,
                        west,
                        0.001f)) {
            float tmp = west;
            west = east;
            east = tmp;
        }

        LLPoint pts[] = new LLPoint[cfs.maxIndex()];
        int lpcount = 0, outcount = 0, elimscale = 0;
        float cfslls[] = cfs.vals;
        int cfstupsize = cfs.tsize;
        for (int i = 0; i < pts.length; i++) {
            float lllon = cfslls[cfstupsize * i];
            float lllat = cfslls[cfstupsize * i + 1];
            if ((lllat < south) || (lllat > north)
                    || ((west < east) && ((lllon < west) || (lllon > east)))
                    || ((west > east) && (lllon < west) && (lllon > east))) {
                outcount++;
                if (((lpcount > 1) && (outcount > 2))
                        || ((lpcount == 1) && (outcount > 1))) {
                    pts[lpcount] = new LLPoint(lllat, lllon); //overwrite
                                                              // previous
                    continue;
                }
            } else {
                outcount = 0;
            }
            if ((lpcount > 0)
                    && (i != (pts.length - 1))
                    && (java.lang.Math.abs(pts[lpcount - 1].lat - lllat) < dpplat)
                    && (java.lang.Math.abs(pts[lpcount - 1].lon - lllon) < dpplon)) {
                elimscale++;
                continue;
            }
            pts[lpcount++] = new LLPoint(lllat, lllon);
        }
        //only 1 point in poly, and it was out of bounds...
        if ((lpcount == 1) && (outcount > 0))
            lpcount = 0;

        if (lpcount != cfs.maxIndex()) {
            LLPoint newpts[] = new LLPoint[lpcount];
            System.arraycopy(pts, 0, newpts, 0, lpcount);
            pts = newpts;
            //System.out.println("Old(" + cfs.maxIndex() +
            //                   ")-area(" + elimarea+")-scale(" + elimscale +
            //                   ") = new(" + pts.length + ")");
        }
        if (pts.length == 0) {
            return null;
        }
        return pts;
    }

    protected static SColor textColors[] = {
            new SColor((short) (244 * 255), (short) (164 * 255), (short) (96 * 255)),
            new SColor((short) (210 * 255), (short) (180 * 255), (short) (140 * 255)),
            new SColor((short) (210 * 255), (short) (105 * 255), (short) (30 * 255)),
            new SColor((short) (188 * 255), (short) (143 * 255), (short) (143 * 255)),
            new SColor((short) (205 * 255), (short) (92 * 255), (short) (92 * 255)),
            new SColor((short) (178 * 255), (short) (34 * 255), (short) (34 * 255)) };

    /**
     *  
     */
    public SText createTextSText(String text, float latitude, float longitude) {
        SText py = new SText();
        py.rType(RenderType.RT_LatLon);
        py.data(text);
        py.ll1(new LLPoint(latitude, longitude));
        return py;
    }

    //     public void drawTile(GraphicList spec, float dpplat, float
    // dpplon,
    //                       LatLonPoint ll1, LatLonPoint ll2, int[] hack) {
    //      SColor colors[] = new SColor[6];
    //      colors[0] = new
    // SColor((short)(244*255),(short)(164*255),(short)(96*255));
    //      colors[1] = new
    // SColor((short)(210*255),(short)(180*255),(short)(140*255));
    //      colors[2] = new
    // SColor((short)(210*255),(short)(105*255),(short)(30*255));
    //      colors[3] = new
    // SColor((short)(188*255),(short)(143*255),(short)(143*255));
    //      colors[4] = new
    // SColor((short)(205*255),(short)(92*255),(short)(92*255));
    //      colors[5] = new
    // SColor((short)(178*255),(short)(34*255),(short)(34*255));

    //      float ll1lat = ll1.getLatitude();
    //      float ll1lon = ll1.getLongitude();
    //      float ll2lat = ll2.getLatitude();
    //      float ll2lon = ll2.getLongitude();

    //      Vector v;
    //      try {
    //          while ((v = parseRow()) != null) {
    //              System.out.println("tt1"); // TCMDBG
    //              String textval = (String)(v.elementAt(textColumn));
    //              MutableInt texttype = new MutableInt(-1);
    //              String desc = covtable.getTextDescription(v, texttype);

    //              CoordFloatString coords =
    // (CoordFloatString)(v.elementAt(coordColumn));
    //              LLPoint pts = new LLPoint(coords.getYasFloat(0),
    //                                        coords.getXasFloat(0));

    //              if ((pts.lat < ll2lat) || (pts.lat > ll1lat) ||
    //                  (pts.lon < ll1lon) || (pts.lon > ll2lon)) {
    //                  continue;
    //              }

    //              hack[0] = hack[0] + 1;
    //              hack[1] = hack[1] + coords.maxIndex();
    //              SText py = new SText();
    //              py.rType(RenderType.RT_LatLon);
    //              py.data(textval);
    //              py.ll1(pts);
    //              py.object(new LineComp(desc));
    //              if (texttype.value < 0) {
    //                  py.color(colors[5]);
    //              } else {
    //                  py.color(colors[texttype.value%5]);
    //              }
    //              if (spec != null) {
    //                  spec.addSGraphic(py);
    //              }
    //          }
    //      } catch (FormatException f) {
    //          System.out.println("Exception: " + f.getClass() + " " +
    // f.getMessage());
    //      }
    //     }

    public UGraphic[] packGraphics() {
        return graphics.packGraphics();
    }

    Comp[] getComps() {
        return graphics.getComps();
    }

    private static SColor cmap[] = null;

    public static SColor ns(java.awt.Color color) {
        int r = color.getRed();
        int g = color.getGreen();
        int b = color.getBlue();

        return ns(r, g, b);
    }

    private static SColor ns(int r, int g, int b) {
        return new SColor((short) (r * 256), (short) (g * 256), (short) (b * 256));
    }

    public static SColor getSColor(int place) {
        if (cmap == null) {
            cmap = new SColor[8];
            //cmap[0] = ns(255, 0,0);
            //cmap[1] = ns(0, 255, 0);
            //      cmap[2] = ns(0, 0, 255);
            cmap[0] = ns(205, 192, 176);
            cmap[1] = ns(255, 192, 203);
            cmap[2] = ns(221, 160, 221);
            cmap[3] = ns(162, 205, 90);
            cmap[4] = ns(255, 218, 185);
            cmap[5] = ns(255, 160, 122);
            cmap[6] = ns(205, 201, 165);
            cmap[7] = ns(216, 191, 216);
            //      cmap[8] = ns(255, 165, 0);
            //      cmap[9] = ns( 0, 255, 0);
            //      cmap[10] = ns( 0, 255, 255);
        }
        return (cmap[place % cmap.length]);
    }

    /**
     * Return true if we may draw some entity node(point) features.
     */
    public boolean drawEPointFeatures() {
        return false;
    }

    /**
     * Return true if we may draw some connected node(point) features.
     */
    public boolean drawCPointFeatures() {
        return false;
    }

    /**
     * Get a List of Strings listing all the feature types wanted.
     * Returned with the area features first, then text features, then
     * line features, then point features.
     */
    public List getFeatures() {
        return new ArrayList();
    }

    /**
     * Set which library to use. If null, all applicable libraries in
     * database will be searched.
     */
    private String useLibrary = null;

    /**
     * Set the VPF library to use. If null, all libraries will be
     * searched. Null is default.
     */
    public void setUseLibrary(String lib) {
        useLibrary = lib;
    }

    /**
     * Get a library name to limit selections from. Used by the
     * LibrarySelectionTable to find out if selection from database
     * should be limitied to tiles or feature from certain libraries.
     * Specified here instead of the LibrarySelectionTable in case the
     * LST is shared among layers, since the warehouse is specific to
     * a particular layer.
     */
    public String getUseLibrary() {
        return useLibrary;
    }

}