#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)
+
+/* Picking states */
+typedef struct {
+ guint picked : 1;
+ guint selected : 1;
+ guint clicking : 1;
+} GritsState;
+
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
+
+ GritsState state; // Internal, used for picking
};
struct _GritsObjectClass {
/* Move some of these to GObject? */
void (*draw) (GritsObject *object, GritsOpenGL *opengl);
+ void (*pick) (GritsObject *object, GritsOpenGL *opengl);
+ void (*hide) (GritsObject *object, gboolean hidden);
};
GType grits_object_get_type(void);
/* Implemented by sub-classes */
void grits_object_draw(GritsObject *object, GritsOpenGL *opengl);
+void grits_object_hide(GritsObject *object, gboolean hidden);
+
+/* Interal, used by grits_opengl */
+void grits_object_pick_begin(GritsObject *object, GritsOpenGL *opengl);
+void grits_object_pick_pointer(GritsObject *object, double x, double y);
+void grits_object_pick_end(GritsObject *object);
+void grits_object_event(GritsObject *object, GdkEvent *event);
+
/**
* grits_object_queue_draw:
* @object: The #GritsObject that needs drawing