2 * Copyright (C) 2010 Andy Spencer <andy753421@gmail.com>
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 * @short_description: Single point polys
22 * Each #GritsPoly represents a 3 dimentional polygon.
28 #include "grits-poly.h"
31 static void grits_poly_tess(gdouble (**points)[3])
33 //g_debug("GritsPoly: tess");
34 GLUtesselator *tess = gluNewTess();
35 gluTessCallback(tess, GLU_TESS_BEGIN, (_GLUfuncptr)glBegin);
36 gluTessCallback(tess, GLU_TESS_VERTEX, (_GLUfuncptr)glVertex3dv);
37 gluTessCallback(tess, GLU_TESS_END, (_GLUfuncptr)glEnd);
38 for (int pi = 0; points[pi]; pi++) {
39 gluTessBeginPolygon(tess, NULL);
40 gluTessBeginContour(tess);
41 for (int ci = 0; points[pi][ci][0]; ci++) {
46 gluTessEndContour(tess);
47 gluTessEndPolygon(tess);
52 static void grits_poly_outline(gdouble (**points)[3])
54 //g_debug("GritsPoly: outline");
55 for (int pi = 0; points[pi]; pi++) {
57 for (int ci = 0; points[pi][ci][0] &&
59 points[pi][ci][2]; ci++)
60 glVertex3dv(points[pi][ci]);
65 static gboolean grits_poly_runlist(GritsPoly *poly, int i,
66 void (*render)(gdouble(**)[3]))
68 //g_debug("GritsPoly: genlist");
70 glCallList(poly->list[i]);
72 guint list = glGenLists(1);
73 glNewList(list, GL_COMPILE_AND_EXECUTE);
81 static void grits_poly_draw(GritsObject *_poly, GritsOpenGL *opengl)
83 //g_debug("GritsPoly: draw");
84 GritsPoly *poly = GRITS_POLY(_poly);
86 glPushAttrib(GL_COLOR_BUFFER_BIT | GL_ENABLE_BIT | GL_CURRENT_BIT);
87 glDisable(GL_TEXTURE_2D);
88 glDisable(GL_ALPHA_TEST);
89 glDisable(GL_CULL_FACE);
90 glDisable(GL_LIGHTING);
91 glEnable(GL_POLYGON_OFFSET_FILL);
92 glPolygonOffset(1, 1);
94 glColor4dv(poly->color);
95 grits_poly_runlist(poly, 0, grits_poly_tess);
97 glLineWidth(poly->width);
98 glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
99 if (poly->border[3]) {
100 glColor4dv(poly->border);
101 grits_poly_runlist(poly, 1, grits_poly_outline);
103 glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
107 static void grits_poly_pick(GritsObject *_poly, GritsOpenGL *opengl)
109 //g_debug("GritsPoly: pick");
110 GritsPoly *poly = GRITS_POLY(_poly);
111 glPushAttrib(GL_ENABLE_BIT);
112 glDisable(GL_CULL_FACE);
113 grits_poly_runlist(poly, 0, grits_poly_tess);
122 * Create a new GritsPoly which TODO.
124 * Returns: the new #GritsPoly.
126 GritsPoly *grits_poly_new(gdouble (**points)[3])
128 //g_debug("GritsPoly: new - %p", points);
129 GritsPoly *poly = g_object_new(GRITS_TYPE_POLY, NULL);
130 poly->points = points;
134 GritsPoly *grits_poly_parse(const gchar *str,
135 const gchar *poly_sep, const gchar *point_sep, const gchar *coord_sep)
137 /* Split and count polygons */
138 gchar **spolys = g_strsplit(str, poly_sep, -1);
139 int npolys = g_strv_length(spolys);
141 GritsBounds bounds = {-90, 90, -180, 180};
142 gdouble (**polys)[3] = (gpointer)g_new0(double*, npolys+1);
143 for (int pi = 0; pi < npolys; pi++) {
144 /* Split and count coordinates */
145 gchar **scoords = g_strsplit(spolys[pi], point_sep, -1);
146 int ncoords = g_strv_length(scoords);
148 /* Create binary coords */
149 gdouble (*coords)[3] = (gpointer)g_new0(gdouble, 3*(ncoords+1));
150 for (int ci = 0; ci < ncoords; ci++) {
152 sscanf(scoords[ci], "%lf,%lf", &lat, &lon);
153 if (lat > bounds.n) bounds.n = lat;
154 if (lat < bounds.s) bounds.s = lat;
155 if (lon > bounds.e) bounds.e = lon;
156 if (lon < bounds.w) bounds.w = lon;
163 /* Insert coords into poly array */
168 /* Create GritsPoly */
169 GritsPoly *poly = grits_poly_new(polys);
170 GRITS_OBJECT(poly)->center.lat = (bounds.n + bounds.s)/2;
171 GRITS_OBJECT(poly)->center.lon = lon_avg(bounds.e, bounds.w);
172 GRITS_OBJECT(poly)->center.elev = 0;
173 GRITS_OBJECT(poly)->skip = GRITS_SKIP_CENTER;
178 G_DEFINE_TYPE(GritsPoly, grits_poly, GRITS_TYPE_OBJECT);
179 static void grits_poly_init(GritsPoly *poly)
184 poly->border[3] = 0.2;
186 GRITS_OBJECT(poly)->skip = GRITS_SKIP_STATE;
189 static void grits_poly_finalize(GObject *_poly)
191 g_debug("GritsPoly: finalize");
192 GritsPoly *poly = GRITS_POLY(_poly);
197 static void grits_poly_class_init(GritsPolyClass *klass)
199 g_debug("GritsPoly: class_init");
200 GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
201 gobject_class->finalize = grits_poly_finalize;
203 GritsObjectClass *object_class = GRITS_OBJECT_CLASS(klass);
204 object_class->draw = grits_poly_draw;
205 object_class->pick = grits_poly_pick;