This is a base class for queries that might require a round-trip to the graphics engine. More...
#include "queryContext.h"
Public Member Functions | |
| virtual TypeHandle | force_init_type () |
| virtual TypeHandle | get_type () const |
| virtual bool | is_answer_ready () const =0 |
| Returns true if the query's answer is ready, false otherwise. More... | |
| virtual void | waiting_for_answer () |
| Requests the graphics engine to expedite the pending answer–the application is now waiting until the answer is ready. More... | |
 Public Member Functions inherited from TypedReferenceCount | |
| TypedReferenceCount (const TypedReferenceCount ©) | |
| void | operator= (const TypedReferenceCount ©) |
| Public Member Functions inherited from TypedObject | |
| TypedObject (const TypedObject ©)=default | |
| TypedObject * | as_typed_object () |
| Returns the object, upcast (if necessary) to a TypedObject pointer. More... | |
| const TypedObject * | as_typed_object () const |
| Returns the object, upcast (if necessary) to a TypedObject pointer. More... | |
| int | get_best_parent_from_Set (const std::set< int > &) const |
| int | get_type_index () const |
| Returns the internal index number associated with this object's TypeHandle, a unique number for each different type. More... | |
| bool | is_exact_type (TypeHandle handle) const |
| Returns true if the current object is the indicated type exactly. More... | |
| bool | is_of_type (TypeHandle handle) const |
| Returns true if the current object is or derives from the indicated type. More... | |
| TypedObject & | operator= (const TypedObject ©)=default |
| Public Member Functions inherited from ReferenceCount | |
| int | get_ref_count () const |
| WeakReferenceList * | get_weak_list () const |
| Returns the WeakReferenceList associated with this ReferenceCount object. More... | |
| bool | has_weak_list () const |
| Returns true if this particular ReferenceCount object has a WeakReferenceList created, false otherwise. More... | |
| void | local_object () |
| This function should be called, once, immediately after creating a new instance of some ReferenceCount-derived object on the stack. More... | |
| void | ref () const |
| Explicitly increments the reference count. More... | |
| bool | ref_if_nonzero () const |
| Atomically increases the reference count of this object if it is not zero. More... | |
| bool | test_ref_count_integrity () const |
| Does some easy checks to make sure that the reference count isn't completely bogus. More... | |
| bool | test_ref_count_nonzero () const |
| Does some easy checks to make sure that the reference count isn't zero, or completely bogus. More... | |
| virtual bool | unref () const |
| Explicitly decrements the reference count. More... | |
| WeakReferenceList * | weak_ref () |
| Adds the indicated PointerToVoid as a weak reference to this object. More... | |
| void | weak_unref () |
| Removes the indicated PointerToVoid as a weak reference to this object. More... | |
Static Public Member Functions | |
| static TypeHandle | get_class_type () |
| static void | init_type () |
| Static Public Member Functions inherited from TypedReferenceCount | |
| static TypeHandle | get_class_type () |
| static void | init_type () |
| Static Public Member Functions inherited from TypedObject | |
| static TypeHandle | get_class_type () |
| static void | init_type () |
| This function is declared non-inline to work around a compiler bug in g++ 2.96. More... | |
| Static Public Member Functions inherited from ReferenceCount | |
| static TypeHandle | get_class_type () |
| static void | init_type () |
Additional Inherited Members | |
| Public Attributes inherited from TypedObject | |
| get_type | |
| Public Attributes inherited from ReferenceCount | |
| get_ref_count | |
| Returns the current reference count. More... | |
Detailed Description
This is a base class for queries that might require a round-trip to the graphics engine.
The idea is that when you ask the GSG to make a particular query, it returns a QueryContext, which does not necessarily have the answer right away (but it will eventually).
Unlike SavedContext, QueryContext is reference-counted. It removes itself from the GSG when the last reference goes away. You're responsible for keeping the pointer to the QueryContext as long as you are interested in the answer.
Definition at line 33 of file queryContext.h.
Member Function Documentation
◆ is_answer_ready()
|
pure virtual |
Returns true if the query's answer is ready, false otherwise.
If this returns false, the application must continue to poll until it returns true.
It is only valid to call this from the draw thread.
Implemented in DXOcclusionQueryContext9.
Definition at line 32 of file queryContext.cxx.
◆ waiting_for_answer()
|
virtual |
Requests the graphics engine to expedite the pending answer–the application is now waiting until the answer is ready.
It is only valid to call this from the draw thread.
Reimplemented in DXOcclusionQueryContext9.
Definition at line 43 of file queryContext.cxx.
The documentation for this class was generated from the following files:
- panda/src/gobj/queryContext.h
- panda/src/gobj/queryContext.cxx
- panda/src/gobj/queryContext.I
