120 lines
3.8 KiB
C++
120 lines
3.8 KiB
C++
/**
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This file is a part of our_dick
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Copyright (C) 2020 rexy712
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero 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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This program 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 Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef OUR_DICK_ENGINE_CAMERA_HPP
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#define OUR_DICK_ENGINE_CAMERA_HPP
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#include "math/math.hpp"
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#include "object.hpp"
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namespace egn{
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//Virtual base for camera types
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//Provides general object functionality as well as projection and view matrices.
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//Derived classes must provide method of recalculating the projection matrix.
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class camera_iface : public object_base
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{
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protected:
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enum update{
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VIEW_UPDATE = 8,
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PROJ_UPDATE = 16,
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};
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protected:
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//mutable because they're only really a cached value representation of the data
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//in position, orientation, near, far, etc
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mutable math::mat4f m_projection_matrix; //camera-to-sceen matrix
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mutable math::mat4f m_view_matrix; //world-to-camera matrix
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float m_near = 1; //near clipping plane in camera space
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float m_far = 100; //far clipping plane in camera space
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public:
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camera_iface(void) = default;
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//Initialize with given projection matrix and clipping planes
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camera_iface(const math::mat4f& proj, float n, float f);
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camera_iface(const camera_iface&) = default;
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camera_iface(camera_iface&&) = default;
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virtual ~camera_iface(void) = default;
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camera_iface& operator=(const camera_iface&) = default;
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camera_iface& operator=(camera_iface&&) = default;
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//Set the camera's location and update relevant data structures
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void set_position(const math::vec3f& pos)override;
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//Set the camera's facing angle and update relevant data structures
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void set_orientation(const math::quat_f& distance)override;
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//getters
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const math::mat4f& get_projection_matrix()const;
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const math::mat4f& get_view_matrix()const;
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float get_near_plane()const;
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float get_far_plane()const;
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//setters
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void set_near_plane(float n);
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void set_far_plane(float f);
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//No control over matrices directly is done purposefully
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protected:
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void recalc_view_matrix()const;
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virtual void recalc_projection_matrix()const = 0;
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};
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//Camera which performs an orthographic projection. Essentially camera will have no depth perspective
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class ortho_camera : public camera_iface
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{
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protected:
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float m_width, m_height; //width and height of the camera space box
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public:
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//Build camera with width, height, near, and far planes
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ortho_camera(float w, float h, float n, float f);
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ortho_camera(const ortho_camera&) = default;
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ortho_camera(ortho_camera&&) = default;
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~ortho_camera() = default;
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ortho_camera& operator=(const ortho_camera&) = default;
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ortho_camera& operator=(ortho_camera&&) = default;
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//Getters
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float get_projection_width()const;
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float get_projection_height()const;
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//Setters
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void set_projection_width(float w);
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void set_projection_height(float h);
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void set_projection_box(float w, float h);
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protected:
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void recalc_projection_matrix()const override;
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};
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class flat_camera : public ortho_camera
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{
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public:
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flat_camera(float w, float h);
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flat_camera(const flat_camera&) = default;
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flat_camera(flat_camera&&) = default;
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~flat_camera(void) = default;
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flat_camera& operator=(const flat_camera&) = default;
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flat_camera& operator=(flat_camera&&) = default;
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};
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}
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#endif
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