adding initial ridge overlay code, swiching from cubes to teapots, and a few other...

[grits] / src / example.c

diff --git a/src/example.c b/src/example.c
new file mode 100644 (file)
index 0000000..a53d62e
--- /dev/null
+++ b/src/example.c
@@ -0,0 +1,69 @@
+#include <config.h>
+#include <gtk/gtk.h>
+#include <gtk/gtkgl.h>
+#include <gdk/gdkkeysyms.h>
+#include <GL/gl.h>
+#include <math.h>
+
+static GtkWidget *rotate_button;
+
+static float ang = 30.;
+
+static gboolean expose(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
+{
+       glPushMatrix();
+       glLoadIdentity();
+       glTranslatef(0.5, -0.5, 0);
+
+       float light_ambient[]  = {0.1f, 0.1f, 0.0f};
+       float light_diffuse[]  = {0.9f, 0.9f, 0.9f};
+       float light_position[] = {-20.0f, 40.0f, -40.0f, 1.0f};
+       glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
+       glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
+       glLightfv(GL_LIGHT0, GL_POSITION, light_position);
+       glEnable(GL_LIGHT0);
+       glEnable(GL_LIGHTING);
+       glEnable(GL_COLOR_MATERIAL);
+       glEnable(GL_DEPTH_TEST);
+
+       glRotatef(ang, 1, 0, 1);
+       glColor3f(0.9, 0.9, 0.7);
+       gdk_gl_draw_teapot(TRUE, 0.25);
+       glColor3f(1.0, 1.0, 1.0);
+
+       glDisable(GL_LIGHT0);
+       glDisable(GL_LIGHTING);
+       glDisable(GL_COLOR_MATERIAL);
+       glDisable(GL_DEPTH_TEST);
+
+       glPopMatrix();
+       return FALSE;
+}
+
+static gboolean rotate(gpointer user_data)
+{
+       if (!gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(rotate_button)))
+               return TRUE;
+
+       GtkWidget *da = GTK_WIDGET (user_data);
+
+       ang++;
+
+       gdk_window_invalidate_rect(da->window, &da->allocation, FALSE);
+       gdk_window_process_updates(da->window, FALSE);
+
+       return TRUE;
+}
+
+gboolean example_init(GtkDrawingArea *drawing, GtkNotebook *config)
+{
+       /* Add configuration tab */
+       GtkWidget *label = gtk_label_new("example");
+       rotate_button = gtk_toggle_button_new_with_label("Rotate");
+       gtk_notebook_append_page(GTK_NOTEBOOK(config), rotate_button, label);
+
+       /* Set up OpenGL Stuff */
+       g_signal_connect(drawing, "expose-event", G_CALLBACK(expose), NULL);
+       g_timeout_add(1000/60, rotate, drawing);
+       return TRUE;
+}