💿🐜 Antkeeper source code
https://antkeeper.com
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58 lines
1.8 KiB
58 lines
1.8 KiB
/*
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* Copyright (C) 2021 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 "spatial-system.hpp"
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#include "ecs/components/parent-component.hpp"
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#include "ecs/components/transform-component.hpp"
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namespace ecs {
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spatial_system::spatial_system(ecs::registry& registry):
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entity_system(registry)
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{}
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void spatial_system::update(double t, double dt)
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{
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/// @TODO: sort transforms by parent, for more multi-level hierarchies
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// Process parent transforms first
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registry.view<transform_component>().each(
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[&](ecs::entity entity, auto& transform)
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{
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if (!this->registry.has<parent_component>(entity))
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{
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transform.world = transform.local;
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}
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});
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// Process child transforms second
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registry.view<transform_component>().each(
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[&](ecs::entity entity, auto& transform)
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{
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if (this->registry.has<parent_component>(entity))
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{
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ecs::entity parent = this->registry.get<parent_component>(entity).parent;
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const transform_component& parent_transform = this->registry.get<transform_component>(parent);
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transform.world = parent_transform.world * transform.local;
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transform.warp = parent_transform.warp;
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}
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});
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}
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} // namespace ecs
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