if (object->hidden)
return;
- /* Skip out of range objects */
- if (object->lod > 0) {
+ /* Support GritsTester */
+ if (!GRITS_IS_OPENGL(opengl)) {
+ g_debug("GritsObject: draw - drawing raw object");
+ klass->draw(object, opengl);
+ return;
+ }
+
+ /* Calculae distance for LOD and horizon tests */
+ GritsPoint *center = &object->center;
+ if ((!(object->skip & GRITS_SKIP_LOD) ||
+ !(object->skip & GRITS_SKIP_HORIZON)) &&
+ (center->elev != -EARTH_R)) {
/* LOD test */
gdouble eye[3], obj[3];
- grits_viewer_get_location(GRITS_VIEWER(opengl), &eye[0], &eye[1], &eye[2]);
+ grits_viewer_get_location(GRITS_VIEWER(opengl),
+ &eye[0], &eye[1], &eye[2]);
gdouble elev = eye[2];
- lle2xyz(eye[0], eye[1], eye[2], &eye[0], &eye[1], &eye[2]);
- lle2xyz(object->center.lat, object->center.lon, object->center.elev,
- &obj[0], &obj[1], &obj[2]);
+ lle2xyz(eye[0], eye[1], eye[2],
+ &eye[0], &eye[1], &eye[2]);
+ lle2xyz(center->lat, center->lon, center->elev,
+ &obj[0], &obj[1], &obj[2]);
gdouble dist = distd(obj, eye);
- if (object->lod < dist)
- return;
-
- /* Horizon testing */
- gdouble c = EARTH_R+elev;
- gdouble a = EARTH_R;
- gdouble horizon = sqrt(c*c - a*a);
- if (dist > horizon)
- return;
+
+ /* Level of detail test */
+ if (!(object->skip & GRITS_SKIP_LOD)
+ && object->lod > 0) {
+ if (object->lod < dist)
+ return;
+ }
+
+ /* Horizon test */
+ if (!(object->skip & GRITS_SKIP_HORIZON)) {
+ gdouble c = EARTH_R+elev;
+ gdouble a = EARTH_R;
+ gdouble horizon = sqrt(c*c - a*a);
+ if (dist > horizon)
+ return;
+ }
}
/* Save state, draw, restore state */
g_mutex_lock(opengl->sphere_lock);
- glPushAttrib(GL_ALL_ATTRIB_BITS);
- glMatrixMode(GL_PROJECTION); glPushMatrix();
- glMatrixMode(GL_MODELVIEW); glPushMatrix();
+ if (!(object->skip & GRITS_SKIP_STATE)) {
+ glPushAttrib(GL_ALL_ATTRIB_BITS);
+ glMatrixMode(GL_PROJECTION); glPushMatrix();
+ glMatrixMode(GL_MODELVIEW); glPushMatrix();
+ }
+
+ if (!(object->skip & GRITS_SKIP_CENTER))
+ grits_viewer_center_position(GRITS_VIEWER(opengl),
+ object->center.lat,
+ object->center.lon,
+ object->center.elev);
klass->draw(object, opengl);
- glPopAttrib();
- glMatrixMode(GL_PROJECTION); glPopMatrix();
- glMatrixMode(GL_MODELVIEW); glPopMatrix();
+ if (!(object->skip & GRITS_SKIP_STATE)) {
+ glPopAttrib();
+ glMatrixMode(GL_PROJECTION); glPopMatrix();
+ glMatrixMode(GL_MODELVIEW); glPopMatrix();
+ }
g_mutex_unlock(opengl->sphere_lock);
}
G_DEFINE_ABSTRACT_TYPE(GritsObject, grits_object, G_TYPE_OBJECT);
static void grits_object_init(GritsObject *object)
{
+ object->center.lat = 0;
+ object->center.lon = 0;
+ object->center.elev = -EARTH_R;
}
static void grits_object_class_init(GritsObjectClass *klass)
#define GRITS_IS_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GRITS_TYPE_OBJECT))
#define GRITS_OBJECT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GRITS_TYPE_OBJECT, GritsObjectClass))
+/* Bitmask of things to skip while drawing the object */
+#define GRITS_SKIP_LOD (1<<0)
+#define GRITS_SKIP_HORIZON (1<<1)
+#define GRITS_SKIP_CENTER (1<<2)
+#define GRITS_SKIP_STATE (1<<3)
+
typedef struct _GritsObject GritsObject;
typedef struct _GritsObjectClass GritsObjectClass;
GritsPoint center; // Center of the object
gboolean hidden; // If true, the object will not be drawn
gdouble lod; // Level of detail, used to hide small objects
+ guint32 skip; // Bit mask of safe operations
};
struct _GritsObjectClass {