💿🐜 Antkeeper source code
https://antkeeper.com
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71 lines
2.0 KiB
71 lines
2.0 KiB
/*
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* Copyright (C) 2023 Christopher J. Howard
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*
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* This file is part of Antkeeper source code.
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*
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* Antkeeper source code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Antkeeper source code is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <engine/render/stages/culling-stage.hpp>
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#include <engine/scene/camera.hpp>
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#include <engine/scene/collection.hpp>
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#include <algorithm>
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#include <execution>
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#include <mutex>
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namespace render {
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void culling_stage::execute(render::context& ctx)
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{
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// Get all objects in the collection
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const auto& objects = ctx.collection->get_objects();
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// Get camera view frustum
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const auto& view_frustum = ctx.camera->get_view_frustum();
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// Construct mutex to guard set of visible objects
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std::mutex mutex;
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// For each object in the scene collection
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std::for_each
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(
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std::execution::par,
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std::begin(objects),
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std::end(objects),
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[&](scene::object_base* object)
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{
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// Ignore inactive objects and cameras
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if (!object->is_active() || object->get_object_type_id() == scene::camera::object_type_id)
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{
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return;
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}
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// Cull object if it doesn't share any common layers with the camera
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//if (!(object->get_layer_mask() & camera_layer_mask))
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// return;
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// Cull object if it's outside of the camera view frustum
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if (!view_frustum.intersects(object->get_bounds()))
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{
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return;
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}
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// Insert object into set of visible objects
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std::lock_guard<std::mutex> guard(mutex);
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ctx.objects.push_back(object);
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}
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);
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}
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} // namespace render
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