104 lines
3.3 KiB
C++
104 lines
3.3 KiB
C++
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#ifndef CAMERA_MATRIX_H
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#define CAMERA_MATRIX_H
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#include "Defs.hpp"
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#include "Plane.hpp"
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#include "Rect2.hpp"
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#include "Transform.hpp"
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#include <vector>
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namespace {
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using namespace godot;
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} // namespace
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struct CameraMatrix {
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enum Planes {
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PLANE_NEAR,
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PLANE_FAR,
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PLANE_LEFT,
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PLANE_TOP,
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PLANE_RIGHT,
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PLANE_BOTTOM
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};
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real_t matrix[4][4];
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void set_identity();
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void set_zero();
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void set_light_bias();
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void set_light_atlas_rect(const Rect2 &p_rect);
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void set_perspective(real_t p_fovy_degrees, real_t p_aspect, real_t p_z_near, real_t p_z_far, bool p_flip_fov = false);
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void set_perspective(real_t p_fovy_degrees, real_t p_aspect, real_t p_z_near, real_t p_z_far, bool p_flip_fov, int p_eye, real_t p_intraocular_dist, real_t p_convergence_dist);
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void set_for_hmd(int p_eye, real_t p_aspect, real_t p_intraocular_dist, real_t p_display_width, real_t p_display_to_lens, real_t p_oversample, real_t p_z_near, real_t p_z_far);
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void set_orthogonal(real_t p_left, real_t p_right, real_t p_bottom, real_t p_top, real_t p_znear, real_t p_zfar);
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void set_orthogonal(real_t p_size, real_t p_aspect, real_t p_znear, real_t p_zfar, bool p_flip_fov = false);
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void set_frustum(real_t p_left, real_t p_right, real_t p_bottom, real_t p_top, real_t p_near, real_t p_far);
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void set_frustum(real_t p_size, real_t p_aspect, Vector2 p_offset, real_t p_near, real_t p_far, bool p_flip_fov = false);
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static real_t get_fovy(real_t p_fovx, real_t p_aspect) {
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return rad2deg(atan(p_aspect * tan(deg2rad(p_fovx) * 0.5)) * 2.0);
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}
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static inline double deg2rad(double p_y) { return p_y * Math_PI / 180.0; }
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static inline float deg2rad(float p_y) { return p_y * Math_PI / 180.0; }
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static inline double rad2deg(double p_y) { return p_y * 180.0 / Math_PI; }
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static inline float rad2deg(float p_y) { return p_y * 180.0 / Math_PI; }
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static inline double absd(double g) {
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union {
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double d;
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uint64_t i;
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} u;
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u.d = g;
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u.i &= (uint64_t)9223372036854775807ll;
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return u.d;
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}
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real_t get_z_far() const;
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real_t get_z_near() const;
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real_t get_aspect() const;
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real_t get_fov() const;
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bool is_orthogonal() const;
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std::vector<Plane> get_projection_planes(const Transform &p_transform) const;
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bool get_endpoints(const Transform &p_transform, Vector3 *p_8points) const;
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Vector2 get_viewport_half_extents() const;
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void invert();
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CameraMatrix inverse() const;
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CameraMatrix operator*(const CameraMatrix &p_matrix) const;
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Plane xform4(const Plane &p_vec4) const;
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inline Vector3 xform(const Vector3 &p_vec3) const;
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operator String() const;
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void scale_translate_to_fit(const AABB &p_aabb);
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void make_scale(const Vector3 &p_scale);
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int get_pixels_per_meter(int p_for_pixel_width) const;
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operator Transform() const;
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CameraMatrix();
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CameraMatrix(const Transform &p_transform);
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~CameraMatrix();
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};
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Vector3 CameraMatrix::xform(const Vector3 &p_vec3) const {
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Vector3 ret;
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ret.x = matrix[0][0] * p_vec3.x + matrix[1][0] * p_vec3.y + matrix[2][0] * p_vec3.z + matrix[3][0];
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ret.y = matrix[0][1] * p_vec3.x + matrix[1][1] * p_vec3.y + matrix[2][1] * p_vec3.z + matrix[3][1];
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ret.z = matrix[0][2] * p_vec3.x + matrix[1][2] * p_vec3.y + matrix[2][2] * p_vec3.z + matrix[3][2];
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real_t w = matrix[0][3] * p_vec3.x + matrix[1][3] * p_vec3.y + matrix[2][3] * p_vec3.z + matrix[3][3];
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return ret / w;
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}
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#endif
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