Pileus Git - grits/blob - examples/plugin/teapot.c

   1 /*
   2  * Copyright (C) 2009 Andy Spencer <spenceal@rose-hulman.edu>
   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 #include <gtk/gtkgl.h>
  19 #include <GL/gl.h>
  20
  21 #include <gis/gis.h>
  22
  23 #include "teapot.h"
  24
  25 /***********
  26  * Helpers *
  27  ***********/
  28 static gboolean rotate(gpointer _self)
  29 {
  30         GisPluginTeapot *self = _self;
  31         if (gtk_toggle_button_get_active(self->button)) {
  32                 self->rotation += 1.0;
  33                 gtk_widget_queue_draw(GTK_WIDGET(self->viewer));
  34         }
  35         return TRUE;
  36 }
  37
  38 static gpointer expose(GisCallback *callback, gpointer _self)
  39 {
  40         GisPluginTeapot *self = GIS_PLUGIN_TEAPOT(_self);
  41         g_debug("GisPluginTeapot: expose");
  42
  43         glMatrixMode(GL_PROJECTION);
  44         glLoadIdentity();
  45         glOrtho(1,-1, -1,1, -10,10);
  46
  47         glMatrixMode(GL_MODELVIEW);
  48         glLoadIdentity();
  49
  50         float light_ambient[]  = {0.1f, 0.1f, 0.0f, 1.0f};
  51         float light_diffuse[]  = {0.9f, 0.9f, 0.9f, 1.0f};
  52         float light_position[] = {-30.0f, 50.0f, 40.0f, 1.0f};
  53         glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
  54         glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
  55         glLightfv(GL_LIGHT0, GL_POSITION, light_position);
  56         glEnable(GL_COLOR_MATERIAL);
  57
  58         glTranslatef(-0.5, -0.5, -2);
  59         glRotatef(self->rotation, 1, 1, 0);
  60         glColor4f(0.9, 0.9, 0.7, 1.0);
  61         glDisable(GL_CULL_FACE);
  62         gdk_gl_draw_teapot(TRUE, 0.25);
  63
  64         return NULL;
  65 }
  66
  67
  68 /***********
  69  * Methods *
  70  ***********/
  71 GisPluginTeapot *gis_plugin_teapot_new(GisViewer *viewer, GisPrefs *prefs)
  72 {
  73         g_debug("GisPluginTeapot: new");
  74         GisPluginTeapot *self = g_object_new(GIS_TYPE_PLUGIN_TEAPOT, NULL);
  75         self->viewer = viewer;
  76
  77         /* Add renderers */
  78         GisCallback *callback = gis_callback_new(expose, self);
  79         gis_viewer_add(viewer, GIS_OBJECT(callback), GIS_LEVEL_WORLD, 0);
  80
  81         return self;
  82 }
  83
  84 static GtkWidget *gis_plugin_teapot_get_config(GisPlugin *_self)
  85 {
  86         GisPluginTeapot *self = GIS_PLUGIN_TEAPOT(_self);
  87         return GTK_WIDGET(self->button);
  88 }
  89
  90
  91 /****************
  92  * GObject code *
  93  ****************/
  94 /* Plugin init */
  95 static void gis_plugin_teapot_plugin_init(GisPluginInterface *iface);
  96 G_DEFINE_TYPE_WITH_CODE(GisPluginTeapot, gis_plugin_teapot, G_TYPE_OBJECT,
  97                 G_IMPLEMENT_INTERFACE(GIS_TYPE_PLUGIN,
  98                         gis_plugin_teapot_plugin_init));
  99 static void gis_plugin_teapot_plugin_init(GisPluginInterface *iface)
 100 {
 101         g_debug("GisPluginTeapot: plugin_init");
 102         /* Add methods to the interface */
 103         iface->get_config = gis_plugin_teapot_get_config;
 104 }
 105 /* Class/Object init */
 106 static void gis_plugin_teapot_init(GisPluginTeapot *self)
 107 {
 108         g_debug("GisPluginTeapot: init");
 109         /* Set defaults */
 110         self->button    = GTK_TOGGLE_BUTTON(gtk_toggle_button_new_with_label("Rotate"));
 111         self->rotate_id = g_timeout_add(1000/60, rotate, self);
 112         self->rotation  = 30.0;
 113 }
 114 static void gis_plugin_teapot_dispose(GObject *gobject)
 115 {
 116         g_debug("GisPluginTeapot: dispose");
 117         GisPluginTeapot *self = GIS_PLUGIN_TEAPOT(gobject);
 118         g_source_remove(self->rotate_id);
 119         /* Drop references */
 120         G_OBJECT_CLASS(gis_plugin_teapot_parent_class)->dispose(gobject);
 121 }
 122 static void gis_plugin_teapot_class_init(GisPluginTeapotClass *klass)
 123 {
 124         g_debug("GisPluginTeapot: class_init");
 125         GObjectClass *gobject_class = (GObjectClass*)klass;
 126         gobject_class->dispose  = gis_plugin_teapot_dispose;
 127 }