85 lines
2.4 KiB
C++
85 lines
2.4 KiB
C++
/**
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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 displayRegionDrawCallbackData.cxx
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* @author drose
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* @date 2009-03-13
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*/
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#include "displayRegionDrawCallbackData.h"
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#include "config_display.h"
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#include "cullResult.h"
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#include "displayRegion.h"
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#include "graphicsOutput.h"
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#include "graphicsStateGuardian.h"
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#include "sceneSetup.h"
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TypeHandle DisplayRegionDrawCallbackData::_type_handle;
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/**
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*
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*/
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DisplayRegionDrawCallbackData::
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DisplayRegionDrawCallbackData(CullResult *cull_result, SceneSetup *scene_setup) :
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_cull_result(cull_result),
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_scene_setup(scene_setup)
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{
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}
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/**
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*
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*/
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void DisplayRegionDrawCallbackData::
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output(std::ostream &out) const {
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out << get_type() << "(" << (void *)_cull_result << ", "
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<< (void *)_scene_setup << ")";
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}
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/**
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* You should make this call during the callback if you want to continue the
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* normal rendering function that would have been done in the absence of a
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* callback.
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*
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* Specifically, this method will draw all of the objects in the CullResult
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* list that have been built up for the DisplayRegion during the cull
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* traversal.
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*/
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void DisplayRegionDrawCallbackData::
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upcall() {
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Thread *current_thread = Thread::get_current_thread();
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DisplayRegion *dr = _scene_setup->get_display_region();
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GraphicsStateGuardian *gsg = dr->get_window()->get_gsg();
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if (_cull_result == nullptr || _scene_setup == nullptr) {
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// Nothing to see here.
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} else if (dr->is_stereo()) {
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// We don't actually draw the stereo DisplayRegions. These are just
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// placeholders; we draw the individual left and right eyes instead. (We
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// might still clear the stereo DisplayRegions, though, since it's
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// probably faster to clear right and left channels in one pass, than to
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// clear them in two separate passes.)
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} else if (!gsg->set_scene(_scene_setup)) {
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// The scene or lens is inappropriate somehow.
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display_cat.error()
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<< gsg->get_type() << " cannot render scene with specified lens.\n";
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} else {
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// Tell the GSG to forget its state.
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gsg->clear_state_and_transform();
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if (gsg->begin_scene()) {
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_cull_result->draw(current_thread);
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gsg->end_scene();
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}
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}
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}
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