/* http://research.microsoft.com/pubs/70307/tr-2006-81.pdf */
/* http://www.opengl.org/wiki/Alpha_Blending */
+/* The unsorted/sroted GLists are blank head nodes,
+ * This way us we can remove objects from the level just by fixing up links
+ * I.e. we don't need to do a lookup to remove an object if we have its GList */
+struct RenderLevel {
+ GList unsorted;
+ GList sorted;
+};
+
/***********
* Helpers *
***********/
g_mutex_unlock(opengl->sphere_lock);
}
+static gboolean _foreach_object_cb(gpointer key, gpointer value, gpointer pointers)
+{
+ struct RenderLevel *level = value;
+ GFunc user_func = ((gpointer*)pointers)[0];
+ gpointer user_data = ((gpointer*)pointers)[1];
+ for (GList *cur = level->unsorted.next; cur; cur = cur->next)
+ user_func(cur->data, user_data);
+ for (GList *cur = level->sorted.next; cur; cur = cur->next)
+ user_func(cur->data, user_data);
+ return FALSE;
+}
+
+static void _foreach_object(GritsOpenGL *opengl, GFunc func, gpointer user_data)
+{
+ gpointer pointers[2] = {func, user_data};
+ g_tree_foreach(opengl->objects, _foreach_object_cb, pointers);
+}
/*************
* Callbacks *
*************/
-/* The unsorted/sroted GLists are blank head nodes,
- * This way us we can remove objects from the level just by fixing up links
- * I.e. we don't need to do a lookup to remove an object if we have its GList */
-struct RenderLevel {
- GList unsorted;
- GList sorted;
-};
-
static gboolean on_configure(GritsOpenGL *opengl, GdkEventConfigure *event, gpointer _)
{
g_debug("GritsOpenGL: on_configure");
return FALSE;
}
+static gboolean on_motion_notify(GritsOpenGL *opengl, GdkEventMotion *event, gpointer _)
+{
+ gdouble height = GTK_WIDGET(opengl)->allocation.height;
+ gdouble gl_x = event->x;
+ gdouble gl_y = height - event->y;
+
+ /* Configure view */
+ gint viewport[4];
+ gdouble projection[16];
+ glGetIntegerv(GL_VIEWPORT, viewport);
+ glGetDoublev(GL_PROJECTION_MATRIX, projection);
+
+ glMatrixMode(GL_PROJECTION);
+ glPushMatrix();
+ glLoadIdentity();
+ gluPickMatrix(gl_x, gl_y, 2, 2, viewport);
+ glMultMatrixd(projection);
+
+ /* Prepare for picking */
+ guint buffer[100][4] = {};
+ glSelectBuffer(G_N_ELEMENTS(buffer), (guint*)buffer);
+ glRenderMode(GL_SELECT);
+ glInitNames();
+
+ /* Run picking */
+ g_mutex_lock(opengl->objects_lock);
+ _foreach_object(opengl, (GFunc)grits_object_pick_begin, opengl);
+ int hits = glRenderMode(GL_RENDER);
+ g_debug("GritsOpenGL: on_motion_notify - hits=%d ev=%.0lf,%.0lf",
+ hits, gl_x, gl_y);
+ for (int i = 0; i < hits; i++) {
+ //g_debug("\tHit: %d", i);
+ //g_debug("\t\tcount: %d", buffer[i][0]);
+ //g_debug("\t\tz1: %f", (float)buffer[i][1]/0x7fffffff);
+ //g_debug("\t\tz2: %f", (float)buffer[i][2]/0x7fffffff);
+ //g_debug("\t\tname: %p", (gpointer)buffer[i][3]);
+ GritsObject *object = GRITS_OBJECT(buffer[i][3]);
+ grits_object_pick_pointer(object, gl_x, gl_y);
+ }
+ _foreach_object(opengl, (GFunc)grits_object_pick_end, NULL);
+ g_mutex_unlock(opengl->objects_lock);
+
+ /* Cleanup */
+ glMatrixMode(GL_PROJECTION);
+ glPopMatrix();
+
+ return FALSE;
+}
+
static gboolean on_key_press(GritsOpenGL *opengl, GdkEventKey *event, gpointer _)
{
g_debug("GritsOpenGL: on_key_press - key=%x, state=%x, plus=%x",
g_signal_connect(opengl, "location-changed", G_CALLBACK(on_view_changed), NULL);
g_signal_connect(opengl, "rotation-changed", G_CALLBACK(on_view_changed), NULL);
+ g_signal_connect(opengl, "motion-notify-event", G_CALLBACK(on_motion_notify), NULL);
#ifndef ROAM_DEBUG
opengl->sm_source[0] = g_timeout_add_full(G_PRIORITY_HIGH_IDLE+30, 33, (GSourceFunc)on_idle, opengl, NULL);
opengl->sm_source[1] = g_timeout_add_full(G_PRIORITY_HIGH_IDLE+10, 500, (GSourceFunc)on_idle, opengl, NULL);