306 lines
7.8 KiB
Text
306 lines
7.8 KiB
Text
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file geomNode.I
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* @author drose
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* @date 2002-02-23
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*/
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/**
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* Sets the "preserved" flag. When this is true, the GeomNode will be left
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* untouched by any flatten operations.
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*/
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INLINE void GeomNode::
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set_preserved(bool value) {
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_preserved = value;
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}
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/**
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* Returns the "preserved" flag. When this is true, the GeomNode will be left
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* untouched by any flatten operations.
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*/
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INLINE bool GeomNode::
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get_preserved() const {
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return _preserved;
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}
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/**
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* Returns the number of geoms in the node.
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*/
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INLINE int GeomNode::
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get_num_geoms() const {
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CDReader cdata(_cycler);
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return cdata->get_geoms()->size();
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}
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/**
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* Returns the nth geom of the node. This object should not be modified,
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* since the same object might be shared between multiple different GeomNodes,
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* but see modify_geom().
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*/
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INLINE CPT(Geom) GeomNode::
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get_geom(int n) const {
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CDReader cdata(_cycler);
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CPT(GeomList) geoms = cdata->get_geoms();
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nassertr(n >= 0 && n < (int)geoms->size(), nullptr);
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return (*geoms)[n]._geom.get_read_pointer();
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}
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/**
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* Returns the nth geom of the node, suitable for modifying it. If the nth
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* Geom has multiple reference counts to it, reassigns it to an identical copy
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* first, and returns the new copy--this provides a "copy on write" that
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* ensures that the Geom that is returned is unique to this GeomNode and is
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* not shared with any other GeomNodes.
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*
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* Note that if this method is called in a downstream stage (for instance,
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* during cull or draw), then it will propagate the new list of Geoms upstream
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* all the way to pipeline stage 0, which may step on changes that were made
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* independently in pipeline stage 0. Use with caution.
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*/
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INLINE PT(Geom) GeomNode::
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modify_geom(int n) {
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CDWriter cdata(_cycler, true);
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PT(GeomList) geoms = cdata->modify_geoms();
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nassertr(n >= 0 && n < (int)geoms->size(), nullptr);
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mark_internal_bounds_stale();
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return (*geoms)[n]._geom.get_write_pointer();
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}
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/**
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* Returns the RenderState associated with the nth geom of the node. This is
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* just the RenderState directly associated with the Geom; the actual state in
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* which the Geom is rendered will also be affected by RenderStates that
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* appear on the scene graph in nodes above this GeomNode.
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*/
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INLINE const RenderState *GeomNode::
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get_geom_state(int n) const {
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CDReader cdata(_cycler);
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CPT(GeomList) geoms = cdata->get_geoms();
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nassertr(n >= 0 && n < (int)geoms->size(), nullptr);
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return (*geoms)[n]._state;
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}
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/**
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* Changes the RenderState associated with the nth geom of the node. This is
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* just the RenderState directly associated with the Geom; the actual state in
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* which the Geom is rendered will also be affected by RenderStates that
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* appear on the scene graph in nodes above this GeomNode.
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*
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* Note that if this method is called in a downstream stage (for instance,
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* during cull or draw), then it will propagate the new list of Geoms upstream
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* all the way to pipeline stage 0, which may step on changes that were made
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* independently in pipeline stage 0. Use with caution.
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*/
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INLINE void GeomNode::
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set_geom_state(int n, const RenderState *state) {
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CDWriter cdata(_cycler, true);
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PT(GeomList) geoms = cdata->modify_geoms();
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nassertv(n >= 0 && n < (int)geoms->size());
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(*geoms)[n]._state = state;
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}
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/**
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* Removes the nth geom from the node.
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*/
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INLINE void GeomNode::
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remove_geom(int n) {
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CDWriter cdata(_cycler);
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PT(GeomList) geoms = cdata->modify_geoms();
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nassertv(n >= 0 && n < (int)geoms->size());
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geoms->erase(geoms->begin() + n);
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mark_internal_bounds_stale();
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}
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/**
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* Removes all the geoms from the node at once.
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*/
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INLINE void GeomNode::
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remove_all_geoms() {
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CDWriter cdata(_cycler);
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cdata->set_geoms(new GeomList);
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mark_internal_bounds_stale();
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}
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/**
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* Returns the default into_collide_mask assigned to new GeomNodes.
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*/
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INLINE CollideMask GeomNode::
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get_default_collide_mask() {
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return default_geom_node_collide_mask;
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}
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/**
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* Increments the count for the indicated InternalName.
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*/
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INLINE void GeomNode::
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count_name(GeomNode::NameCount &name_count, const InternalName *name) {
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std::pair<NameCount::iterator, bool> result =
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name_count.insert(NameCount::value_type(name, 1));
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if (!result.second) {
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(*result.first).second++;
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}
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}
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/**
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* Returns the count for the indicated InternalName.
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*/
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INLINE int GeomNode::
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get_name_count(const GeomNode::NameCount &name_count, const InternalName *name) {
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NameCount::const_iterator ni;
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ni = name_count.find(name);
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if (ni != name_count.end()) {
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return (*ni).second;
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}
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return 0;
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}
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/**
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* Returns an object that can be used to walk through the list of geoms of the
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* node. When you intend to visit multiple geoms, using this is slightly
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* faster than calling get_geom() directly on the GeomNode, since this object
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* avoids reopening the PipelineCycler each time.
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*
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* This object also protects you from self-modifying loops (e.g. adding or
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* removing geoms during traversal), since a virtual copy of the geoms is made
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* ahead of time. The virtual copy is fast--it is a form of copy-on-write, so
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* the list is not actually copied unless it is modified during the traversal.
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*/
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INLINE GeomNode::Geoms GeomNode::
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get_geoms(Thread *current_thread) const {
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CDReader cdata(_cycler, current_thread);
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return Geoms(cdata);
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}
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/**
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*
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*/
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INLINE GeomNode::GeomEntry::
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GeomEntry(Geom *geom, const RenderState *state) :
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_geom(geom),
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_state(state)
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{
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}
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/**
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*
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*/
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INLINE GeomNode::CData::
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CData() :
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_geoms(new GeomNode::GeomList)
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{
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}
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/**
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* Returns a read-only pointer to the _geoms list.
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*/
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INLINE CPT(GeomNode::GeomList) GeomNode::CData::
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get_geoms() const {
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return _geoms.get_read_pointer();
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}
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/**
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* Returns a modifiable, unique pointer to the _geoms list.
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*/
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INLINE PT(GeomNode::GeomList) GeomNode::CData::
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modify_geoms() {
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return _geoms.get_write_pointer();
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}
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/**
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* Replaces the _geoms list with a new list.
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*/
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INLINE void GeomNode::CData::
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set_geoms(GeomNode::GeomList *geoms) {
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_geoms = geoms;
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}
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/**
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*
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*/
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INLINE GeomNode::Geoms::
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Geoms() {
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}
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/**
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*
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*/
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INLINE GeomNode::Geoms::
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Geoms(const GeomNode::CData *cdata) :
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_geoms(cdata->get_geoms())
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{
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}
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/**
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*
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*/
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INLINE GeomNode::Geoms::
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Geoms(const GeomNode::Geoms ©) :
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_geoms(copy._geoms)
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{
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}
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/**
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*
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*/
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INLINE void GeomNode::Geoms::
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operator = (const GeomNode::Geoms ©) {
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_geoms = copy._geoms;
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}
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/**
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*
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*/
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INLINE GeomNode::Geoms::
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Geoms(GeomNode::Geoms &&from) noexcept :
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_geoms(std::move(from._geoms))
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{
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}
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/**
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*
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*/
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INLINE void GeomNode::Geoms::
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operator = (GeomNode::Geoms &&from) noexcept {
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_geoms = std::move(from._geoms);
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}
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/**
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* Returns the number of geoms of the node.
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*/
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INLINE int GeomNode::Geoms::
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get_num_geoms() const {
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nassertr(!_geoms.is_null(), 0);
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return _geoms->size();
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}
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/**
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* Returns the nth geom of the node. This object should not be modified,
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* since the same object might be shared between multiple different GeomNodes.
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*/
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INLINE CPT(Geom) GeomNode::Geoms::
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get_geom(int n) const {
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nassertr(!_geoms.is_null(), nullptr);
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nassertr(n >= 0 && n < (int)_geoms->size(), nullptr);
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return (*_geoms)[n]._geom.get_read_pointer();
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}
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/**
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* Returns the RenderState associated with the nth geom of the node. This is
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* just the RenderState directly associated with the Geom; the actual state in
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* which the Geom is rendered will also be affected by RenderStates that
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* appear on the scene graph in nodes above this GeomNode.
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*/
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INLINE const RenderState *GeomNode::Geoms::
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get_geom_state(int n) const {
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nassertr(!_geoms.is_null(), nullptr);
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nassertr(n >= 0 && n < (int)_geoms->size(), nullptr);
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return (*_geoms)[n]._state;
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}
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