💿🐜 Antkeeper source code
https://antkeeper.com
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249 lines
5.8 KiB
249 lines
5.8 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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#ifndef ANTKEEPER_SCENE_OBJECT_HPP
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#define ANTKEEPER_SCENE_OBJECT_HPP
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#include "animation/tween.hpp"
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#include "geom/bounding-volume.hpp"
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#include "math/vector-type.hpp"
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#include "math/quaternion-type.hpp"
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#include "math/transform-type.hpp"
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#include <atomic>
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#include <cstddef>
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namespace scene {
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/**
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* Internal base class for scene objects.
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*/
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class object_base
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{
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public:
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typedef math::vector<float, 3> vector_type;
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typedef math::quaternion<float> quaternion_type;
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typedef math::transform<float> transform_type;
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typedef geom::bounding_volume<float> bounding_volume_type;
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/// Returns the type ID for this scene object type.
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virtual const std::size_t get_object_type_id() const = 0;
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/**
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* Creates a scene object base.
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*/
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object_base();
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/**
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* Destroys a scene object base.
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*/
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virtual ~object_base() = default;
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/**
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* Updates all tweens in the scene object.
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*/
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virtual void update_tweens();
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/**
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* Activates or deactivates the scene object.
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*/
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void set_active(bool active);
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/**
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*
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*/
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void look_at(const vector_type& position, const vector_type& target, const vector_type& up);
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/**
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* Sets the scene object's transform.
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*/
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void set_transform(const transform_type& transform);
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/**
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* Sets the scene object's translation.
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*/
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void set_translation(const vector_type& translation);
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/**
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* Sets the scene object's rotation.
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*/
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void set_rotation(const quaternion_type& rotation);
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/**
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* Sets the scene object's scale.
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*/
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void set_scale(const vector_type& scale);
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/**
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* Sets a culling mask for the object, which will be used for view-frustum culling instead of the object's bounds.
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*/
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void set_culling_mask(const bounding_volume_type* culling_mask);
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/// Returns whether the scene object is active.
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bool is_active() const;
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/**
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* Returns the transform.
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*/
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const transform_type& get_transform() const;
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/**
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* Returns the transform's translation vector.
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*/
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const vector_type& get_translation() const;
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/**
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* Returns the transform's rotation quaternion.
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*/
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const quaternion_type& get_rotation() const;
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/**
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* Returns the transform's scale vector.
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*/
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const vector_type& get_scale() const;
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/**
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* Returns the transform tween.
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*/
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const tween<transform_type>& get_transform_tween() const;
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tween<transform_type>& get_transform_tween();
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/**
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* Returns the bounds of the object.
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*/
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virtual const bounding_volume_type& get_bounds() const = 0;
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/**
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* Returns the culling mask of the object.
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*/
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const bounding_volume_type* get_culling_mask() const;
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protected:
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static std::size_t next_object_type_id();
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private:
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/// Interpolates between two transforms.
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static transform_type interpolate_transforms(const transform_type& x, const transform_type& y, float a);
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/**
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* Called every time the scene object's tranform is changed.
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*/
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virtual void transformed();
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bool active;
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tween<transform_type> transform;
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const bounding_volume_type* culling_mask;
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};
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inline void object_base::set_active(bool active)
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{
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this->active = active;
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}
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inline void object_base::set_transform(const transform_type& transform)
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{
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this->transform[1] = transform;
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transformed();
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}
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inline void object_base::set_translation(const vector_type& translation)
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{
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transform[1].translation = translation;
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transformed();
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}
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inline void object_base::set_rotation(const quaternion_type& rotation)
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{
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transform[1].rotation = rotation;
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transformed();
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}
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inline void object_base::set_scale(const vector_type& scale)
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{
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transform[1].scale = scale;
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transformed();
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}
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inline bool object_base::is_active() const
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{
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return active;
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}
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inline const typename object_base::transform_type& object_base::get_transform() const
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{
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return transform[1];
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}
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inline const typename object_base::vector_type& object_base::get_translation() const
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{
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return get_transform().translation;
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}
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inline const typename object_base::quaternion_type& object_base::get_rotation() const
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{
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return get_transform().rotation;
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}
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inline const typename object_base::vector_type& object_base::get_scale() const
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{
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return get_transform().scale;
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}
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inline const tween<typename object_base::transform_type>& object_base::get_transform_tween() const
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{
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return transform;
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}
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inline tween<typename object_base::transform_type>& object_base::get_transform_tween()
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{
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return transform;
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}
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inline const typename object_base::bounding_volume_type* object_base::get_culling_mask() const
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{
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return culling_mask;
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}
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/**
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* Abstract base class for lights, cameras, model instances, and other scene objects.
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*
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* @tparam T This should be the same class that's inheriting from the scene object, in order to give it a valid type-specific ID.
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*/
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template <class T>
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class object: public object_base
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{
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public:
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/// Unique type ID for this scene object type.
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static const std::atomic<std::size_t> object_type_id;
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virtual const std::size_t get_object_type_id() const final;
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};
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template <typename T>
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const std::atomic<std::size_t> object<T>::object_type_id{object_base::next_object_type_id()};
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template <typename T>
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inline const std::size_t object<T>::get_object_type_id() const
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{
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return object_type_id;
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}
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} // namespace scene
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#endif // ANTKEEPER_SCENE_OBJECT_HPP
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