Pileus Git - grits/blob - src/objects/grits-line.c

   1 /*
   2  * Copyright (C) 2012 Andy Spencer <andy753421@gmail.com>
   3  *
   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.
   8  *
   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.
  13  *
  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/>.
  16  */
  17
  18 /**
  19  * SECTION:grits-line
  20  * @short_description: Single point lines
  21  *
  22  * Each #GritsLine represents a 3 dimentional line.
  23  */
  24
  25 #include <config.h>
  26 #include "gtkgl.h"
  27 #include "grits-line.h"
  28
  29 /* Drawing */
  30 static void grits_line_trace(guint mode, gdouble (**points)[3])
  31 {
  32         //g_debug("GritsLine: outline");
  33         for (int pi = 0; points[pi]; pi++) {
  34                 glBegin(mode);
  35                 for (int ci = 0; points[pi][ci][0] &&
  36                                  points[pi][ci][1] &&
  37                                  points[pi][ci][2]; ci++)
  38                         glVertex3dv(points[pi][ci]);
  39                 glEnd();
  40         }
  41 }
  42
  43 static void grits_line_draw(GritsObject *_poly, GritsOpenGL *opengl)
  44 {
  45         //g_debug("GritsLine: draw");
  46         GritsLine *line = GRITS_LINE(_poly);
  47
  48         glPushAttrib(GL_COLOR_BUFFER_BIT | GL_ENABLE_BIT | GL_CURRENT_BIT |
  49                         GL_POINT_BIT | GL_LINE_BIT | GL_POLYGON_BIT);
  50
  51         glDisable(GL_TEXTURE_2D);
  52         glDisable(GL_ALPHA_TEST);
  53         glDisable(GL_CULL_FACE);
  54         glDisable(GL_LIGHTING);
  55
  56         glEnable(GL_LINE_SMOOTH);
  57         glEnable(GL_POINT_SMOOTH);
  58
  59         glColor4dv(line->color);
  60
  61         glPointSize(line->width);
  62         glLineWidth(line->width);
  63
  64         if (line->width > 1)
  65                 grits_line_trace(GL_POINTS, line->points);
  66         grits_line_trace(GL_LINE_STRIP, line->points);
  67
  68         glPopAttrib();
  69 }
  70
  71 /**
  72  * grits_line_new:
  73  * @points:  TODO
  74  * @npoints: TODO
  75  *
  76  * Create a new GritsLine which TODO.
  77  *
  78  * Returns: the new #GritsLine.
  79  */
  80 GritsLine *grits_line_new(gdouble (**points)[3])
  81 {
  82         //g_debug("GritsLine: new - %p", points);
  83         GritsLine *line = g_object_new(GRITS_TYPE_LINE, NULL);
  84         line->points    = points;
  85         return line;
  86 }
  87
  88 GritsLine *grits_line_parse(const gchar *str,
  89                 const gchar *line_sep, const gchar *point_sep, const gchar *coord_sep)
  90 {
  91         GritsPoint center;
  92         gdouble (**lines)[3] = parse_points(str,
  93                         line_sep, point_sep, coord_sep, NULL, &center);
  94
  95         GritsLine *line = grits_line_new(lines);
  96         GRITS_OBJECT(line)->center = center;
  97         GRITS_OBJECT(line)->skip   = GRITS_SKIP_CENTER;
  98         g_object_weak_ref(G_OBJECT(line), (GWeakNotify)free_points, lines);
  99         return line;
 100 }
 101
 102 /* GObject code */
 103 G_DEFINE_TYPE(GritsLine, grits_line, GRITS_TYPE_OBJECT);
 104 static void grits_line_init(GritsLine *line)
 105 {
 106         line->color[0] = 1;
 107         line->color[1] = 1;
 108         line->color[2] = 1;
 109         line->color[3] = 0.2;
 110         line->width    = 1;
 111         GRITS_OBJECT(line)->skip = GRITS_SKIP_STATE;
 112 }
 113
 114 static void grits_line_finalize(GObject *_line)
 115 {
 116         //g_debug("GritsLine: finalize");
 117         GritsLine *line = GRITS_LINE(_line);
 118         (void)line;
 119 }
 120
 121 static void grits_line_class_init(GritsLineClass *klass)
 122 {
 123         g_debug("GritsLine: class_init");
 124         GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
 125         gobject_class->finalize = grits_line_finalize;
 126
 127         GritsObjectClass *object_class = GRITS_OBJECT_CLASS(klass);
 128         object_class->draw = grits_line_draw;
 129         //object_class->pick = grits_line_pick;
 130 }