/* * Copyright (C) 2021 Christopher J. Howard * * This file is part of Antkeeper source code. * * Antkeeper source code is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Antkeeper source code is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Antkeeper source code. If not, see . */ #include "samara-system.hpp" #include "game/components/transform-component.hpp" #include "game/components/samara-component.hpp" #include "math/math.hpp" #include "utility/fundamental-types.hpp" using namespace ecs; samara_system::samara_system(entt::registry& registry): entity_system(registry) {} void samara_system::update(double t, double dt) { registry.view().each( [&](auto entity, auto& samara, auto& transform) { samara.angle += samara.chirality * math::radians(360.0f * 6.0f) * dt; transform.local.translation += samara.direction * 20.0f * (float)dt; transform.local.rotation = math::angle_axis(samara.angle, float3{0, 1, 0}) * math::angle_axis(math::radians(20.0f), float3{1, 0, 0}) * ((samara.chirality < 0.0f) ? math::angle_axis(math::radians(180.0f), float3{0, 0, -1}) : math::quaternion{1, 0, 0, 0}); if (transform.local.translation.y < 0.0f) { const float zone = 200.0f; transform.local.translation.x = math::random(-zone, zone); transform.local.translation.y = math::random(100.0f, 150.0f); transform.local.translation.z = math::random(-zone, zone); transform.warp = true; samara.chirality = (math::random(0.0f, 1.0f) < 0.5f) ? -1.0f : 1.0f; } }); }