💿🐜 Antkeeper source code
https://antkeeper.com
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97 lines
3.2 KiB
97 lines
3.2 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 "constraint-system.hpp"
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#include "game/components/copy-translation-component.hpp"
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#include "game/components/copy-rotation-component.hpp"
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#include "game/components/copy-scale-component.hpp"
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#include "game/components/copy-transform-component.hpp"
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#include "game/components/transform-component.hpp"
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#include "utility/fundamental-types.hpp"
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using namespace ecs;
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constraint_system::constraint_system(entt::registry& registry):
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entity_system(registry)
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{}
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void constraint_system::update(double t, double dt)
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{
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auto transforms_view = registry.view<transform_component>();
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// Handle copy translation constraints
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registry.view<copy_translation_component, transform_component>().each
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(
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[&](auto entity, auto& constraint, auto& transform)
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{
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if (registry.has<transform_component>(constraint.target))
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{
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const float3& target_translation = transforms_view.get(constraint.target).world.translation;
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if (constraint.use_x)
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transform.world.translation.x = (constraint.invert_x) ? -target_translation.x : target_translation.x;
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if (constraint.use_y)
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transform.world.translation.y = (constraint.invert_y) ? -target_translation.y : target_translation.y;
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if (constraint.use_z)
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transform.world.translation.z = (constraint.invert_z) ? -target_translation.z : target_translation.z;
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}
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}
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);
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// Handle copy rotation constraints
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registry.view<copy_rotation_component, transform_component>().each
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(
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[&](auto entity, auto& constraint, auto& transform)
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{
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if (registry.has<transform_component>(constraint.target))
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{
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transform.world.rotation = transforms_view.get(constraint.target).world.rotation;
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}
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}
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);
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// Handle copy scale constraints
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registry.view<copy_scale_component, transform_component>().each
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(
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[&](auto entity, auto& constraint, auto& transform)
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{
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if (registry.has<transform_component>(constraint.target))
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{
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const float3& target_scale = transforms_view.get(constraint.target).world.scale;
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if (constraint.use_x)
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transform.world.scale.x = target_scale.x;
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if (constraint.use_y)
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transform.world.scale.y = target_scale.y;
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if (constraint.use_z)
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transform.world.scale.z = target_scale.z;
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}
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}
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);
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// Handle copy transform constraints
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registry.view<copy_transform_component, transform_component>().each
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(
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[&](auto entity, auto& constraint, auto& transform)
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{
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if (registry.has<transform_component>(constraint.target))
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{
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transform.world = transforms_view.get(constraint.target).world;
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}
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}
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);
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}
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