231 lines
6.8 KiB
C++
231 lines
6.8 KiB
C++
/*************************************************************************/
|
|
/* quat.h */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
|
|
/* */
|
|
/* Permission is hereby granted, free of charge, to any person obtaining */
|
|
/* a copy of this software and associated documentation files (the */
|
|
/* "Software"), to deal in the Software without restriction, including */
|
|
/* without limitation the rights to use, copy, modify, merge, publish, */
|
|
/* distribute, sublicense, and/or sell copies of the Software, and to */
|
|
/* permit persons to whom the Software is furnished to do so, subject to */
|
|
/* the following conditions: */
|
|
/* */
|
|
/* The above copyright notice and this permission notice shall be */
|
|
/* included in all copies or substantial portions of the Software. */
|
|
/* */
|
|
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
|
|
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
|
|
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
|
|
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
|
|
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
|
|
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
|
|
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
/*************************************************************************/
|
|
|
|
// Circular dependency between Vector3 and Basis :/
|
|
#include "core/math/vector3.h"
|
|
|
|
#ifndef QUAT_H
|
|
#define QUAT_H
|
|
|
|
#include "core/math/math_defs.h"
|
|
#include "core/math/math_funcs.h"
|
|
#include "core/ustring.h"
|
|
|
|
class Quat {
|
|
public:
|
|
real_t x = 0, y = 0, z = 0, w = 1;
|
|
|
|
_FORCE_INLINE_ real_t length_squared() const;
|
|
bool is_equal_approx(const Quat &p_quat) const;
|
|
real_t length() const;
|
|
void normalize();
|
|
Quat normalized() const;
|
|
bool is_normalized() const;
|
|
Quat inverse() const;
|
|
_FORCE_INLINE_ real_t dot(const Quat &q) const;
|
|
|
|
void set_euler_xyz(const Vector3 &p_euler);
|
|
Vector3 get_euler_xyz() const;
|
|
void set_euler_yxz(const Vector3 &p_euler);
|
|
Vector3 get_euler_yxz() const;
|
|
|
|
void set_euler(const Vector3 &p_euler) { set_euler_yxz(p_euler); };
|
|
Vector3 get_euler() const { return get_euler_yxz(); };
|
|
|
|
Quat slerp(const Quat &q, const real_t &t) const;
|
|
Quat slerpni(const Quat &q, const real_t &t) const;
|
|
Quat cubic_slerp(const Quat &q, const Quat &prep, const Quat &postq, const real_t &t) const;
|
|
|
|
void set_axis_angle(const Vector3 &axis, const real_t &angle);
|
|
_FORCE_INLINE_ void get_axis_angle(Vector3 &r_axis, real_t &r_angle) const {
|
|
r_angle = 2 * Math::acos(w);
|
|
real_t r = ((real_t)1) / Math::sqrt(1 - w * w);
|
|
r_axis.x = x * r;
|
|
r_axis.y = y * r;
|
|
r_axis.z = z * r;
|
|
}
|
|
|
|
void operator*=(const Quat &q);
|
|
Quat operator*(const Quat &q) const;
|
|
|
|
Quat operator*(const Vector3 &v) const {
|
|
return Quat(w * v.x + y * v.z - z * v.y,
|
|
w * v.y + z * v.x - x * v.z,
|
|
w * v.z + x * v.y - y * v.x,
|
|
-x * v.x - y * v.y - z * v.z);
|
|
}
|
|
|
|
_FORCE_INLINE_ Vector3 xform(const Vector3 &v) const {
|
|
#ifdef MATH_CHECKS
|
|
ERR_FAIL_COND_V_MSG(!is_normalized(), v, "The quaternion must be normalized.");
|
|
#endif
|
|
Vector3 u(x, y, z);
|
|
Vector3 uv = u.cross(v);
|
|
return v + ((uv * w) + u.cross(uv)) * ((real_t)2);
|
|
}
|
|
|
|
_FORCE_INLINE_ void operator+=(const Quat &q);
|
|
_FORCE_INLINE_ void operator-=(const Quat &q);
|
|
_FORCE_INLINE_ void operator*=(const real_t &s);
|
|
_FORCE_INLINE_ void operator/=(const real_t &s);
|
|
_FORCE_INLINE_ Quat operator+(const Quat &q2) const;
|
|
_FORCE_INLINE_ Quat operator-(const Quat &q2) const;
|
|
_FORCE_INLINE_ Quat operator-() const;
|
|
_FORCE_INLINE_ Quat operator*(const real_t &s) const;
|
|
_FORCE_INLINE_ Quat operator/(const real_t &s) const;
|
|
|
|
_FORCE_INLINE_ bool operator==(const Quat &p_quat) const;
|
|
_FORCE_INLINE_ bool operator!=(const Quat &p_quat) const;
|
|
|
|
operator String() const;
|
|
|
|
inline void set(real_t p_x, real_t p_y, real_t p_z, real_t p_w) {
|
|
x = p_x;
|
|
y = p_y;
|
|
z = p_z;
|
|
w = p_w;
|
|
}
|
|
|
|
_FORCE_INLINE_ Quat() {}
|
|
_FORCE_INLINE_ Quat(real_t p_x, real_t p_y, real_t p_z, real_t p_w) :
|
|
x(p_x),
|
|
y(p_y),
|
|
z(p_z),
|
|
w(p_w) {
|
|
}
|
|
Quat(const Vector3 &axis, const real_t &angle) { set_axis_angle(axis, angle); }
|
|
|
|
Quat(const Vector3 &euler) { set_euler(euler); }
|
|
Quat(const Quat &q) :
|
|
x(q.x),
|
|
y(q.y),
|
|
z(q.z),
|
|
w(q.w) {
|
|
}
|
|
|
|
Quat &operator=(const Quat &q) {
|
|
x = q.x;
|
|
y = q.y;
|
|
z = q.z;
|
|
w = q.w;
|
|
return *this;
|
|
}
|
|
|
|
Quat(const Vector3 &v0, const Vector3 &v1) // shortest arc
|
|
{
|
|
Vector3 c = v0.cross(v1);
|
|
real_t d = v0.dot(v1);
|
|
|
|
if (d < -1.0 + CMP_EPSILON) {
|
|
x = 0;
|
|
y = 1;
|
|
z = 0;
|
|
w = 0;
|
|
} else {
|
|
real_t s = Math::sqrt((1.0 + d) * 2.0);
|
|
real_t rs = 1.0 / s;
|
|
|
|
x = c.x * rs;
|
|
y = c.y * rs;
|
|
z = c.z * rs;
|
|
w = s * 0.5;
|
|
}
|
|
}
|
|
};
|
|
|
|
real_t Quat::dot(const Quat &q) const {
|
|
return x * q.x + y * q.y + z * q.z + w * q.w;
|
|
}
|
|
|
|
real_t Quat::length_squared() const {
|
|
return dot(*this);
|
|
}
|
|
|
|
void Quat::operator+=(const Quat &q) {
|
|
x += q.x;
|
|
y += q.y;
|
|
z += q.z;
|
|
w += q.w;
|
|
}
|
|
|
|
void Quat::operator-=(const Quat &q) {
|
|
x -= q.x;
|
|
y -= q.y;
|
|
z -= q.z;
|
|
w -= q.w;
|
|
}
|
|
|
|
void Quat::operator*=(const real_t &s) {
|
|
x *= s;
|
|
y *= s;
|
|
z *= s;
|
|
w *= s;
|
|
}
|
|
|
|
void Quat::operator/=(const real_t &s) {
|
|
*this *= 1.0 / s;
|
|
}
|
|
|
|
Quat Quat::operator+(const Quat &q2) const {
|
|
const Quat &q1 = *this;
|
|
return Quat(q1.x + q2.x, q1.y + q2.y, q1.z + q2.z, q1.w + q2.w);
|
|
}
|
|
|
|
Quat Quat::operator-(const Quat &q2) const {
|
|
const Quat &q1 = *this;
|
|
return Quat(q1.x - q2.x, q1.y - q2.y, q1.z - q2.z, q1.w - q2.w);
|
|
}
|
|
|
|
Quat Quat::operator-() const {
|
|
const Quat &q2 = *this;
|
|
return Quat(-q2.x, -q2.y, -q2.z, -q2.w);
|
|
}
|
|
|
|
Quat Quat::operator*(const real_t &s) const {
|
|
return Quat(x * s, y * s, z * s, w * s);
|
|
}
|
|
|
|
Quat Quat::operator/(const real_t &s) const {
|
|
return *this * (1.0 / s);
|
|
}
|
|
|
|
bool Quat::operator==(const Quat &p_quat) const {
|
|
return x == p_quat.x && y == p_quat.y && z == p_quat.z && w == p_quat.w;
|
|
}
|
|
|
|
bool Quat::operator!=(const Quat &p_quat) const {
|
|
return x != p_quat.x || y != p_quat.y || z != p_quat.z || w != p_quat.w;
|
|
}
|
|
|
|
_FORCE_INLINE_ Quat operator*(const real_t &p_real, const Quat &p_quat) {
|
|
return p_quat * p_real;
|
|
}
|
|
|
|
#endif // QUAT_H
|