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203 | /**************************************************************************/
/* transform.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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. */
/**************************************************************************/
#include "transform.h"
#include "core/math/math_funcs.h"
#include "core/print_string.h"
void Transform::affine_invert() {
basis.invert();
origin = basis.xform(-origin);
}
Transform Transform::affine_inverse() const {
Transform ret = *this;
ret.affine_invert();
return ret;
}
void Transform::invert() {
basis.transpose();
origin = basis.xform(-origin);
}
Transform Transform::inverse() const {
// FIXME: this function assumes the basis is a rotation matrix, with no scaling.
// Transform::affine_inverse can handle matrices with scaling, so GDScript should eventually use that.
Transform ret = *this;
ret.invert();
return ret;
}
void Transform::rotate(const Vector3 &p_axis, real_t p_angle) {
*this = rotated(p_axis, p_angle);
}
Transform Transform::rotated(const Vector3 &p_axis, real_t p_angle) const {
return Transform(Basis(p_axis, p_angle), Vector3()) * (*this);
}
void Transform::rotate_basis(const Vector3 &p_axis, real_t p_angle) {
basis.rotate(p_axis, p_angle);
}
Transform Transform::looking_at(const Vector3 &p_target, const Vector3 &p_up) const {
Transform t = *this;
t.set_look_at(origin, p_target, p_up);
return t;
}
void Transform::set_look_at(const Vector3 &p_eye, const Vector3 &p_target, const Vector3 &p_up) {
#ifdef MATH_CHECKS
ERR_FAIL_COND(p_eye == p_target);
ERR_FAIL_COND(p_up.length() == 0);
#endif
// Reference: MESA source code
Vector3 v_x, v_y, v_z;
/* Make rotation matrix */
/* Z vector */
v_z = p_eye - p_target;
v_z.normalize();
v_y = p_up;
v_x = v_y.cross(v_z);
#ifdef MATH_CHECKS
ERR_FAIL_COND(v_x.length() == 0);
#endif
/* Recompute Y = Z cross X */
v_y = v_z.cross(v_x);
v_x.normalize();
v_y.normalize();
basis.set(v_x, v_y, v_z);
origin = p_eye;
}
Transform Transform::interpolate_with(const Transform &p_transform, real_t p_c) const {
/* not sure if very "efficient" but good enough? */
Vector3 src_scale = basis.get_scale();
Quat src_rot = basis.get_rotation_quat();
Vector3 src_loc = origin;
Vector3 dst_scale = p_transform.basis.get_scale();
Quat dst_rot = p_transform.basis.get_rotation_quat();
Vector3 dst_loc = p_transform.origin;
Transform interp;
interp.basis.set_quat_scale(src_rot.slerp(dst_rot, p_c).normalized(), src_scale.linear_interpolate(dst_scale, p_c));
interp.origin = src_loc.linear_interpolate(dst_loc, p_c);
return interp;
}
void Transform::scale(const Vector3 &p_scale) {
basis.scale(p_scale);
origin *= p_scale;
}
Transform Transform::scaled(const Vector3 &p_scale) const {
Transform t = *this;
t.scale(p_scale);
return t;
}
void Transform::scale_basis(const Vector3 &p_scale) {
basis.scale(p_scale);
}
void Transform::translate(real_t p_tx, real_t p_ty, real_t p_tz) {
translate(Vector3(p_tx, p_ty, p_tz));
}
void Transform::translate(const Vector3 &p_translation) {
for (int i = 0; i < 3; i++) {
origin[i] += basis[i].dot(p_translation);
}
}
Transform Transform::translated(const Vector3 &p_translation) const {
Transform t = *this;
t.translate(p_translation);
return t;
}
void Transform::orthonormalize() {
basis.orthonormalize();
}
Transform Transform::orthonormalized() const {
Transform _copy = *this;
_copy.orthonormalize();
return _copy;
}
bool Transform::is_equal_approx(const Transform &p_transform) const {
return basis.is_equal_approx(p_transform.basis) && origin.is_equal_approx(p_transform.origin);
}
bool Transform::operator==(const Transform &p_transform) const {
return (basis == p_transform.basis && origin == p_transform.origin);
}
bool Transform::operator!=(const Transform &p_transform) const {
return (basis != p_transform.basis || origin != p_transform.origin);
}
void Transform::operator*=(const Transform &p_transform) {
origin = xform(p_transform.origin);
basis *= p_transform.basis;
}
Transform Transform::operator*(const Transform &p_transform) const {
Transform t = *this;
t *= p_transform;
return t;
}
Transform::operator String() const {
return basis.operator String() + " - " + origin.operator String();
}
Transform::Transform(const Basis &p_basis, const Vector3 &p_origin) :
basis(p_basis),
origin(p_origin) {
}
Transform::Transform(real_t xx, real_t xy, real_t xz, real_t yx, real_t yy, real_t yz, real_t zx, real_t zy, real_t zz, real_t ox, real_t oy, real_t oz) {
basis = Basis(xx, xy, xz, yx, yy, yz, zx, zy, zz);<--- Variable 'basis' is assigned in constructor body. Consider performing initialization in initialization list. [+]When an object of a class is created, the constructors of all member variables are called consecutively in the order the variables are declared, even if you don't explicitly write them to the initialization list. You could avoid assigning 'basis' a value by passing the value to the constructor in the initialization list.
origin = Vector3(ox, oy, oz);
}
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