mirror of https://github.com/AxioDL/zeus.git
109 lines
2.8 KiB
C++
109 lines
2.8 KiB
C++
#ifndef CPROJECTION_HPP
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#define CPROJECTION_HPP
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#include "Global.hpp"
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#include "CMatrix4f.hpp"
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#include <stdexcept>
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#define _USE_MATH_DEFINES 1
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#include <math.h>
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enum EProjType
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{
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PROJ_NONE = 0,
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PROJ_ORTHO = 1,
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PROJ_PERSP = 2
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};
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struct SProjOrtho
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{
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float m_top, m_bottom, m_left, m_right, m_near, m_far;
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SProjOrtho(float p_top=1.0f, float p_bottom=-1.0f, float p_left=-1.0f, float p_right=1.0f,
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float p_near=1.0f, float p_far=-1.0f) :
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m_top(p_top), m_bottom(p_bottom), m_left(p_left), m_right(p_right), m_near(p_near), m_far(p_far) {}
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};
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struct SProjPersp
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{
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float m_fov, m_aspect, m_near, m_far;
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SProjPersp(float p_fov=55.0f * M_PI / 180.0f, float p_aspect=1.0f, float p_near=0.1f, float p_far=4096.f) :
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m_fov(p_fov), m_aspect(p_aspect), m_near(p_near), m_far(p_far) {}
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};
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extern const SProjOrtho kOrthoIdentity;
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class ZE_ALIGN(16) CProjection
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{
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void _updateCachedMatrix();
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public:
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ZE_DECLARE_ALIGNED_ALLOCATOR();
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CProjection()
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{
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m_projType = PROJ_ORTHO;
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m_ortho = SProjOrtho();
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m_mtx = CMatrix4f::skIdentityMatrix4f;
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}
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CProjection(const CProjection& other) {*this = other;}
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CProjection(const SProjOrtho& ortho) {setOrtho(ortho);}
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CProjection(const SProjPersp& persp) {setPersp(persp);}
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inline CProjection& operator=(const CProjection& other)
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{
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if (this != &other)
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{
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m_projType = other.m_projType;
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m_ortho = other.m_ortho;
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m_mtx = other.m_mtx;
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}
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return *this;
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}
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inline void setOrtho(const SProjOrtho& ortho)
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{m_projType = PROJ_ORTHO; m_ortho = ortho; _updateCachedMatrix();}
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inline void setPersp(const SProjPersp& persp)
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{m_projType = PROJ_PERSP; m_persp = persp; _updateCachedMatrix();}
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inline EProjType getType() const {return m_projType;}
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inline const SProjOrtho& getOrtho() const
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{
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if (m_projType != PROJ_ORTHO)
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throw std::runtime_error("attempted to access orthographic structure of non-ortho projection");
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return m_ortho;
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}
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inline const SProjPersp& getPersp() const
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{
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if (m_projType != PROJ_PERSP)
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throw std::runtime_error("attempted to access perspective structure of non-persp projection");
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return m_persp;
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}
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inline const CMatrix4f& getCachedMatrix() const {return m_mtx;}
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protected:
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/* Projection type */
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enum EProjType m_projType;
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/* Projection intermediate */
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union
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{
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#ifdef _MSC_VER
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struct
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{
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SProjOrtho m_ortho;
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};
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struct
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{
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SProjPersp m_persp;
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};
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#else
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SProjOrtho m_ortho;
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SProjPersp m_persp;
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#endif
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};
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/* Cached projection matrix */
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CMatrix4f m_mtx;
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};
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#endif // CMATRIX3F_HPP
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