69 lines
1.8 KiB
Text
69 lines
1.8 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 cullBinStateSorted.I
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* @author drose
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* @date 2005-03-22
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*/
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/**
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*
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*/
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INLINE CullBinStateSorted::
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CullBinStateSorted(const std::string &name, GraphicsStateGuardianBase *gsg,
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const PStatCollector &draw_region_pcollector) :
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CullBin(name, BT_state_sorted, gsg, draw_region_pcollector),
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_objects(get_class_type())
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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 CullBinStateSorted::ObjectData::
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ObjectData(CullableObject *object) :
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_object(object)
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{
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if (object->_munged_data == nullptr) {
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_format = nullptr;
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} else {
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_format = object->_munged_data->get_format();
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}
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}
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/**
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* Specifies the correct sort ordering for these objects.
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*/
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INLINE bool CullBinStateSorted::ObjectData::
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operator < (const ObjectData &other) const {
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// Group by state changes, in approximate order from heaviest change to
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// lightest change.
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const RenderState *sa = _object->_state;
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const RenderState *sb = other._object->_state;
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int compare = sa->compare_sort(*sb);
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if (compare != 0) {
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return compare < 0;
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}
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// Vertex format changes are also fairly slow.
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if (_format != other._format) {
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return _format < other._format;
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}
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// Prevent unnecessary vertex buffer rebinds.
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if (_object->_munged_data != other._object->_munged_data) {
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return _object->_munged_data < other._object->_munged_data;
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}
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// Uniform updates are actually pretty fast.
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if (_object->_internal_transform != other._object->_internal_transform) {
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return _object->_internal_transform < other._object->_internal_transform;
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}
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return 0;
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}
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