mirror of https://github.com/AxioDL/zeus.git
113 lines
2.6 KiB
C++
113 lines
2.6 KiB
C++
#pragma once
|
|
|
|
#include <cstdio>
|
|
#include <cstdlib>
|
|
|
|
#include "zeus/CMatrix4f.hpp"
|
|
|
|
namespace zeus {
|
|
enum class EProjType { None = 0, Orthographic = 1, Perspective = 2 };
|
|
|
|
class SProjOrtho {
|
|
public:
|
|
float top, bottom, left, right, znear, zfar;
|
|
|
|
explicit SProjOrtho(float p_top = 1.0f, float p_bottom = -1.0f, float p_left = -1.0f, float p_right = 1.0f,
|
|
float p_near = 1.0f, float p_far = -1.0f)
|
|
: top(p_top), bottom(p_bottom), left(p_left), right(p_right), znear(p_near), zfar(p_far) {}
|
|
};
|
|
|
|
struct SProjPersp {
|
|
float fov, aspect, znear, zfar;
|
|
|
|
SProjPersp(float p_fov = degToRad(55.0f), float p_aspect = 1.0f, float p_near = 0.1f, float p_far = 4096.f)
|
|
: fov(p_fov), aspect(p_aspect), znear(p_near), zfar(p_far) {}
|
|
};
|
|
|
|
extern const SProjOrtho kOrthoIdentity;
|
|
|
|
class CProjection {
|
|
void _updateCachedMatrix();
|
|
|
|
public:
|
|
CProjection() {
|
|
m_projType = EProjType::Orthographic;
|
|
m_ortho = SProjOrtho();
|
|
m_mtx = CMatrix4f();
|
|
}
|
|
|
|
CProjection(const CProjection& other) { *this = other; }
|
|
|
|
CProjection(const SProjOrtho& ortho) { setOrtho(ortho); }
|
|
|
|
CProjection(const SProjPersp& persp) { setPersp(persp); }
|
|
|
|
CProjection& operator=(const CProjection& other) {
|
|
if (this != &other) {
|
|
m_projType = other.m_projType;
|
|
m_ortho = other.m_ortho;
|
|
m_mtx = other.m_mtx;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
void setOrtho(const SProjOrtho& ortho) {
|
|
m_projType = EProjType::Orthographic;
|
|
m_ortho = ortho;
|
|
_updateCachedMatrix();
|
|
}
|
|
|
|
void setPersp(const SProjPersp& persp) {
|
|
m_projType = EProjType::Perspective;
|
|
m_persp = persp;
|
|
_updateCachedMatrix();
|
|
}
|
|
|
|
[[nodiscard]] EProjType getType() const { return m_projType; }
|
|
|
|
[[nodiscard]] const SProjOrtho& getOrtho() const {
|
|
#ifndef NDEBUG
|
|
if (m_projType != EProjType::Orthographic) {
|
|
std::fprintf(stderr, "attempted to access orthographic structure of non-ortho projection");
|
|
std::abort();
|
|
}
|
|
#endif
|
|
return m_ortho;
|
|
}
|
|
|
|
[[nodiscard]] const SProjPersp& getPersp() const {
|
|
#ifndef NDEBUG
|
|
if (m_projType != EProjType::Perspective) {
|
|
std::fprintf(stderr, "attempted to access perspective structure of non-persp projection");
|
|
std::abort();
|
|
}
|
|
#endif
|
|
return m_persp;
|
|
}
|
|
|
|
[[nodiscard]] const CMatrix4f& getCachedMatrix() const { return m_mtx; }
|
|
|
|
protected:
|
|
/* Projection type */
|
|
EProjType m_projType;
|
|
|
|
/* Projection intermediate */
|
|
union {
|
|
#ifdef _MSC_VER
|
|
struct {
|
|
SProjOrtho m_ortho;
|
|
};
|
|
struct {
|
|
SProjPersp m_persp;
|
|
};
|
|
#else
|
|
SProjOrtho m_ortho;
|
|
SProjPersp m_persp;
|
|
#endif
|
|
};
|
|
|
|
/* Cached projection matrix */
|
|
CMatrix4f m_mtx;
|
|
};
|
|
} // namespace zeus
|