💿🐜 Antkeeper source code
https://antkeeper.com
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97 lines
3.0 KiB
97 lines
3.0 KiB
/*
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* Copyright (C) 2023 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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#ifndef ANTKEEPER_GAME_SPRING_ARM_COMPONENT_HPP
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#define ANTKEEPER_GAME_SPRING_ARM_COMPONENT_HPP
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#include <engine/entity/id.hpp>
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#include <engine/math/vector.hpp>
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#include <engine/math/quaternion.hpp>
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#include <engine/math/angles.hpp>
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#include <engine/physics/spring.hpp>
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/**
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* Attaches a camera to an entity using springs.
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*/
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struct spring_arm_component
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{
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/// ID of the entity to which the spring arm is attached.
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entity::id parent_eid{entt::null};
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/// Height of the view frustum at the near clipping distance.
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double near_focal_plane_height{1.0};
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/// Local up rotation quaternion.
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math::dquat up_rotation{math::dquat::identity()};
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/// Attached camera rotation.
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math::dquat camera_rotation{math::dquat::identity()};
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/// Pitch, yaw, and roll velocities, in radians per second.
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math::dvec3 angular_velocities{};
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/// Minimum pitch, yaw, and roll angles, in radians.
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math::dvec3 min_angles{-math::half_pi<double>, -std::numeric_limits<double>::infinity(), -std::numeric_limits<double>::infinity()};
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/// Maximum pitch, yaw, and roll angles, in radians.
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math::dvec3 max_angles{math::half_pi<double>, std::numeric_limits<double>::infinity(), std::numeric_limits<double>::infinity()};
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physics::numeric_spring<math::dvec3, double> focal_point_spring;
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/// Pitch, yaw, and roll angles spring.
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physics::numeric_spring<math::dvec3, double> angles_spring;
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/// Arm length spring.
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// physics::numeric_spring<double, double> arm_length_spring;
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/// Height of the view frustum at the far clipping distance.
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double far_focal_plane_height{50.0};
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/// Horizontal FoV at maximum zoom.
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double near_hfov{math::radians(90.0)};
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/// Horizontal FoV at minimum zoom.
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double far_hfov{math::radians(45.0)};
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/// Zoom factor, on `[0, 1]`.
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double zoom{};
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/// Horizontal FoV of the camera, in radians.
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double hfov{};
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/// Vertical FoV of the camera, in radians.
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double vfov{};
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/// Position of the focal point, relative to the subject.
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math::dvec3 focal_point_offset{};
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/// Distance to the focal plane.
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double focal_distance{};
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/// Width of the view frustum at the focal distance.
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double focal_plane_width{};
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/// Height of the view frustum at the focal distance.
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double focal_plane_height{};
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};
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#endif // ANTKEEPER_GAME_SPRING_ARM_COMPONENT_HPP
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