💿🐜 Antkeeper source code
https://antkeeper.com
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65 lines
2.0 KiB
65 lines
2.0 KiB
/*
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* Copyright (C) 2017-2019 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 "collision-system.hpp"
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CollisionSystem::CollisionSystem(ComponentManager* componentManager):
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System(componentManager),
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entityGroup(componentManager)
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{}
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CollisionSystem::~CollisionSystem()
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{}
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void CollisionSystem::update(float t, float dt)
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{
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auto members = entityGroup.getMembers();
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// INEFFICIENT! Currently done twice (A vs B, then B vs A)
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// Also no octrees or other structure
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for (const CollisionEntityGroup::Member* memberA: *members)
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{
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CollisionComponent* collisionA = std::get<0>(memberA->components);
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TransformComponent* transformA = std::get<1>(memberA->components);
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// Clear previous collisions
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collisionA->collisions.clear();
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for (const CollisionEntityGroup::Member* memberB: *members)
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{
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if (memberA == memberB)
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{
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continue;
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}
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CollisionComponent* collisionB = std::get<0>(memberB->components);
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TransformComponent* transformB = std::get<1>(memberB->components);
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Vector3 difference = transformA->transform.translation - transformB->transform.translation;
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float distanceSquared = glm::length2(difference);
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float collisionRadius = collisionA->radius + collisionB->radius;
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if (distanceSquared <= collisionRadius * collisionRadius)
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{
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collisionA->collisions.push_back(memberB->entity);
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}
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}
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}
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}
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