| 1 | /* Copyright 2013 Malcolm Herring
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| 2 | *
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| 3 | * This is free software: you can redistribute it and/or modify
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| 4 | * it under the terms of the GNU General Public License as published by
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| 5 | * the Free Software Foundation, version 3 of the License.
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| 6 | *
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| 7 | * For a copy of the GNU General Public License, see <http://www.gnu.org/licenses/>.
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| 8 | */
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| 9 |
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| 10 | package seamap;
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| 11 |
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| 12 | import java.awt.Graphics2D;
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| 13 | import java.awt.RenderingHints;
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| 14 | import java.awt.geom.Point2D;
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| 15 | import java.util.ArrayList;
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| 16 | import java.util.HashMap;
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| 17 |
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| 18 | import s57.S57att.Att;
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| 19 | import s57.S57obj.Obj;
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| 20 | import s57.S57val.ColCOL;
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| 21 | import s57.S57val.*;
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| 22 | import s57.S57val;
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| 23 | import seamap.SeaMap.*;
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| 24 | import symbols.Symbols;
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| 25 | import symbols.Symbols.*;
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| 26 |
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| 27 | public class Renderer {
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| 28 |
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| 29 | static MapHelper helper;
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| 30 | static SeaMap map;
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| 31 | static double sScale;
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| 32 | static double tScale;
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| 33 | static Graphics2D g2;
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| 34 |
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| 35 | public static void reRender(Graphics2D g, int zoom, double factor, SeaMap m, MapHelper h) {
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| 36 | g2 = g;
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| 37 | helper = h;
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| 38 | map = m;
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| 39 | sScale = Symbols.symbolScale[zoom]*factor;
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| 40 | tScale = Symbols.textScale[zoom]*factor;
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| 41 | if (map != null) {
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| 42 | g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
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| 43 | g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_GASP);
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| 44 | Rules.rules(map, zoom);
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| 45 | }
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| 46 | }
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| 47 |
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| 48 | public static AttMap getAtts(Feature feature, Obj obj, int idx) {
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| 49 | HashMap<Integer, AttMap> objs = feature.objs.get(obj);
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| 50 | if (objs == null) return null;
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| 51 | else return objs.get(idx);
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| 52 | }
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| 53 |
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| 54 | public static Object getAttVal(Feature feature, Obj obj, int idx, Att att) {
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| 55 | AttMap atts = getAtts(feature, obj, idx);
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| 56 | if (atts == null) return S57val.nullVal(att);
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| 57 | else {
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| 58 | AttItem item = atts.get(att);
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| 59 | if (item == null) return S57val.nullVal(att);
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| 60 | return item.val;
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| 61 | }
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| 62 | }
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| 63 |
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| 64 | public static double calcArea(Feature feature) {
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| 65 | if (feature.flag == Fflag.AREA) {
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| 66 | ArrayList<Long> way = map.ways.get(feature.refs);
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| 67 | Coord coord = map.nodes.get(way.get(0));
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| 68 | double llon = Math.toRadians(coord.lon);
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| 69 | double llat = Math.toRadians(coord.lat);
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| 70 | double sigma = 0.0;
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| 71 | for (long node : way) {
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| 72 | coord = map.nodes.get(node);
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| 73 | double lat = Math.toRadians(coord.lat);
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| 74 | double lon = Math.toRadians(coord.lon);
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| 75 | sigma += (lon * Math.sin(llat)) - (llon * Math.sin(lat));
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| 76 | llon = lon;
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| 77 | llat = lat;
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| 78 | }
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| 79 | return Math.abs(sigma) / 2.0 * 3444 * 3444;
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| 80 | }
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| 81 | return 0.0;
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| 82 | }
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| 83 |
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| 84 | public static Coord findCentroid(Feature feature) {
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| 85 | double tst = calcArea(feature);
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| 86 | Coord coord;
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| 87 | ArrayList<Long> way = map.ways.get(feature.refs);
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| 88 | switch (feature.flag) {
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| 89 | case NODE:
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| 90 | return map.nodes.get(feature.refs);
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| 91 | case WAY:
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| 92 | coord = map.nodes.get(way.get(1));
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| 93 | break;
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| 94 | case AREA:
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| 95 | default:
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| 96 | coord = map.nodes.get(way.get(0));
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| 97 | }
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| 98 | double slat = 0.0;
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| 99 | double slon = 0.0;
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| 100 | double sarc = 0.0;
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| 101 | double llat = coord.lat;
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| 102 | double llon = coord.lon;
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| 103 | for (long node : way) {
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| 104 | coord = map.nodes.get(node);
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| 105 | double lon = coord.lon;
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| 106 | double lat = coord.lat;
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| 107 | double arc = (Math.acos(Math.cos(Math.toRadians(lon-llon)) * Math.cos(Math.toRadians(lat-llat))));
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| 108 | slat += (lat * arc);
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| 109 | slon += (lon * arc);
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| 110 | sarc += arc;
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| 111 | llat = lat;
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| 112 | llon = lon;
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| 113 | }
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| 114 | return map.new Coord((sarc > 0.0 ? slat/sarc : 0.0), (sarc > 0.0 ? slon/sarc : 0.0));
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| 115 | }
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| 116 |
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| 117 | public static void symbol(Feature feature, Symbol symbol, Obj obj, Delta delta) {
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| 118 | Point2D point = helper.getPoint(findCentroid(feature));
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| 119 | ArrayList<ColCOL> colours = (ArrayList<ColCOL>) getAttVal(feature, obj, 0, Att.COLOUR);
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| 120 | ArrayList<ColPAT> pattern = (ArrayList<ColPAT>) getAttVal(feature, obj, 0, Att.COLPAT);
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| 121 | Symbols.drawSymbol(g2, symbol, sScale, point.getX(), point.getY(), delta, new Scheme(pattern, colours));
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| 122 | }
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| 123 |
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| 124 | }
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