💿🐜 Antkeeper source code
https://antkeeper.com
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57 lines
2.0 KiB
57 lines
2.0 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 "samara-system.hpp"
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#include "game/components/transform-component.hpp"
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#include "game/components/samara-component.hpp"
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#include "math/math.hpp"
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#include "utility/fundamental-types.hpp"
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using namespace ecs;
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samara_system::samara_system(entt::registry& registry):
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entity_system(registry)
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{}
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void samara_system::update(double t, double dt)
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{
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registry.view<samara_component, transform_component>().each(
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[&](auto entity, auto& samara, auto& transform)
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{
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samara.angle += samara.chirality * math::radians(360.0f * 6.0f) * dt;
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transform.local.translation += samara.direction * 20.0f * (float)dt;
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transform.local.rotation =
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math::angle_axis(samara.angle, float3{0, 1, 0}) *
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math::angle_axis(math::radians(20.0f), float3{1, 0, 0}) *
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((samara.chirality < 0.0f) ? math::angle_axis(math::radians(180.0f), float3{0, 0, -1}) : math::quaternion<float>{1, 0, 0, 0});
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if (transform.local.translation.y < 0.0f)
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{
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const float zone = 200.0f;
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transform.local.translation.x = math::random(-zone, zone);
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transform.local.translation.y = math::random(100.0f, 150.0f);
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transform.local.translation.z = math::random(-zone, zone);
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transform.warp = true;
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samara.chirality = (math::random(0.0f, 1.0f) < 0.5f) ? -1.0f : 1.0f;
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}
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});
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}
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