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 gluTessBeginPolygon(tess, NULL);
39 for (int pi = 0; points[pi]; pi++) {
40 gluTessBeginContour(tess);
41 for (int ci = 0; points[pi][ci][0]; ci++) {
46 gluTessEndContour(tess);
48 gluTessEndPolygon(tess);
52 static void grits_poly_outline(gdouble (**points)[3])
54 //g_debug("GritsPoly: outline");
55 for (int pi = 0; points[pi]; pi++) {
56 glBegin(GL_LINE_LOOP);
57 for (int ci = 0; points[pi][ci][0]; ci++)
58 glVertex3dv(points[pi][ci]);
62 static gboolean grits_poly_genlist(gpointer _poly)
64 //g_debug("GritsPoly: genlist");
65 GritsPoly *poly = GRITS_POLY(_poly);
66 guint list = glGenLists(2);
67 glNewList(list+0, GL_COMPILE);
68 grits_poly_tess(poly->points);
70 glNewList(list+1, GL_COMPILE);
71 grits_poly_outline(poly->points);
77 static void grits_poly_draw(GritsObject *_poly, GritsOpenGL *opengl)
79 //g_debug("GritsPoly: draw");
80 GritsPoly *poly = GRITS_POLY(_poly);
85 glPushAttrib(GL_COLOR_BUFFER_BIT | GL_ENABLE_BIT | GL_CURRENT_BIT);
86 glDisable(GL_TEXTURE_2D);
87 glDisable(GL_ALPHA_TEST);
88 glDisable(GL_CULL_FACE);
89 glDisable(GL_LIGHTING);
91 glColor4dv(poly->color);
92 glCallList(poly->list+0);
94 if (poly->border[3]) {
95 glLineWidth(poly->width);
96 glColor4dv(poly->border);
97 glCallList(poly->list+1);
107 * Create a new GritsPoly which TODO.
109 * Returns: the new #GritsPoly.
111 GritsPoly *grits_poly_new(gdouble (**points)[3])
113 //g_debug("GritsPoly: new - %p", points);
114 GritsPoly *poly = g_object_new(GRITS_TYPE_POLY, NULL);
115 poly->points = points;
116 g_idle_add(grits_poly_genlist, poly);
120 GritsPoly *grits_poly_parse(gchar *str,
121 gchar *poly_sep, gchar *point_sep, gchar *coord_sep)
123 /* Split and count polygons */
124 gchar **spolys = g_strsplit(str, poly_sep, -1);
125 int npolys = g_strv_length(spolys);
127 GritsPoint center = {0,0,0};
128 gdouble (**polys)[3] = (gpointer)g_new0(double*, npolys+1);
129 for (int pi = 0; pi < npolys; pi++) {
130 /* Split and count coordinates */
131 gchar **scoords = g_strsplit(spolys[pi], point_sep, -1);
132 int ncoords = g_strv_length(scoords);
134 /* Create binary coords */
135 gdouble (*coords)[3] = (gpointer)g_new0(gdouble, 3*(ncoords+1));
136 for (int ci = 0; ci < ncoords; ci++) {
138 sscanf(scoords[ci], "%lf,%lf", &lat, &lon);
150 /* Insert coords into poly array */
155 /* Create GritsPoly */
156 GritsPoly *poly = grits_poly_new(polys);
157 GRITS_OBJECT(poly)->center = center;
162 G_DEFINE_TYPE(GritsPoly, grits_poly, GRITS_TYPE_OBJECT);
163 static void grits_poly_init(GritsPoly *poly)
168 poly->border[3] = 0.2;
172 static void grits_poly_finalize(GObject *_poly)
174 g_debug("GritsPoly: finalize");
175 GritsPoly *poly = GRITS_POLY(_poly);
180 static void grits_poly_class_init(GritsPolyClass *klass)
182 g_debug("GritsPoly: class_init");
183 GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
184 gobject_class->finalize = grits_poly_finalize;
186 GritsObjectClass *object_class = GRITS_OBJECT_CLASS(klass);
187 object_class->draw = grits_poly_draw;