| 1 | // Copyright (C) 2014 ChaosForge Ltd
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| 2 | // http://chaosforge.org/
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| 3 | //
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| 4 | // This file is part of NV Libraries.
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| 5 | // For conditions of distribution and use, see copyright notice in nv.hh
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| 6 | /**
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| 7 | * @file camera.hh
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| 8 | * @author Kornel Kisielewicz epyon@chaosforge.org
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| 9 | * @brief Camera interface class
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| 10 | */
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| 11 |
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| 12 | #ifndef NV_CAMERA_HH
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| 13 | #define NV_CAMERA_HH
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| 14 |
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| 15 | #include <nv/core/common.hh>
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| 16 | #include <nv/core/math.hh>
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| 17 |
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| 18 | namespace nv
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| 19 | {
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| 20 | class camera
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| 21 | {
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| 22 | public:
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| 23 | camera() {}
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| 24 |
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| 25 | void set_lookat( const vec3& eye, const vec3& focus, const vec3& up )
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| 26 | {
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| 27 | m_view = glm::lookAt( eye, focus, up );
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| 28 | m_position = eye;
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| 29 | m_direction = glm::normalize( focus - eye );
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| 30 | }
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| 31 |
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| 32 | void set_perspective( f32 fov, f32 aspect, f32 near, f32 far )
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| 33 | {
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| 34 | m_projection = glm::perspective( fov, aspect, near, far );
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| 35 | }
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| 36 | void set_ortho( f32 left, f32 right, f32 bottom, f32 top, f32 near = -1.0f, f32 far = 1.0f )
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| 37 | {
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| 38 | m_projection = glm::ortho( left, right, bottom, top, near, far );
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| 39 | }
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| 40 | const mat4& get_projection() const
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| 41 | {
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| 42 | return m_projection;
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| 43 | }
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| 44 | const mat4& get_view() const
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| 45 | {
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| 46 | return m_view;
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| 47 | }
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| 48 | const vec3& get_position() const
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| 49 | {
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| 50 | return m_position;
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| 51 | }
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| 52 | const vec3& get_direction() const
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| 53 | {
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| 54 | return m_direction;
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| 55 | }
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| 56 | private:
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| 57 | bool m_dirty;
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| 58 | vec3 m_position;
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| 59 | vec3 m_direction;
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| 60 | mat4 m_projection;
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| 61 | mat4 m_view;
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| 62 | };
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| 63 |
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| 64 | // TODO - this and camera should have dirty states
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| 65 | class scene_state
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| 66 | {
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| 67 | public:
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| 68 | const camera& get_camera() const { return m_camera; }
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| 69 | camera& get_camera() { return m_camera; }
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| 70 | void set_camera( const camera& c ) { m_camera = c; }
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| 71 | void set_model( const mat4& m ) { m_model = m; }
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| 72 | void set_viewport( const ivec4& v ){ m_viewport = v; }
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| 73 | const ivec4& get_viewport() const { return m_viewport; }
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| 74 | const mat4& get_model() const { return m_model; }
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| 75 | const mat4& get_view() const { return m_camera.get_view(); }
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| 76 | const mat4& get_projection() const { return m_camera.get_projection(); }
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| 77 | mat4 get_modelview() const { return get_view() * m_model; }
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| 78 | mat4 get_mvp() const { return m_camera.get_projection() * get_modelview(); }
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| 79 |
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| 80 | mat4 get_view_inv() const { return glm::inverse( get_view() ); }
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| 81 | mat4 get_model_inv() const { return glm::inverse( get_model() ); }
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| 82 | mat3 get_normal() const { return glm::transpose(glm::inverse(glm::mat3( get_modelview() ) ) ); }
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| 83 | protected:
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| 84 | mat4 m_model;
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| 85 | camera m_camera;
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| 86 | ivec4 m_viewport;
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| 87 | };
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| 88 |
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| 89 |
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| 90 | }
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| 91 |
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| 92 | #endif // NV_CAMERA_HH
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