godot/servers/physics_3d/godot_joint_3d.h

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/**************************************************************************/
/* godot_joint_3d.h */
/**************************************************************************/
/* 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. */
/**************************************************************************/
#ifndef GODOT_JOINT_3D_H
#define GODOT_JOINT_3D_H
#include "godot_body_3d.h"
#include "godot_constraint_3d.h"
class GodotJoint3D : public GodotConstraint3D {
protected:
bool dynamic_A = false;
bool dynamic_B = false;
void plane_space(const Vector3 &n, Vector3 &p, Vector3 &q) {
if (Math::abs(n.z) > Math_SQRT12) {
// choose p in y-z plane
real_t a = n[1] * n[1] + n[2] * n[2];
real_t k = 1.0 / Math::sqrt(a);
p = Vector3(0, -n[2] * k, n[1] * k);
// set q = n x p
q = Vector3(a * k, -n[0] * p[2], n[0] * p[1]);
} else {
// choose p in x-y plane
real_t a = n.x * n.x + n.y * n.y;
real_t k = 1.0 / Math::sqrt(a);
p = Vector3(-n.y * k, n.x * k, 0);
// set q = n x p
q = Vector3(-n.z * p.y, n.z * p.x, a * k);
}
}
_FORCE_INLINE_ real_t atan2fast(real_t y, real_t x) {
real_t coeff_1 = Math_PI / 4.0f;
real_t coeff_2 = 3.0f * coeff_1;
real_t abs_y = Math::abs(y);
real_t angle;
if (x >= 0.0f) {
real_t r = (x - abs_y) / (x + abs_y);
angle = coeff_1 - coeff_1 * r;
} else {
real_t r = (x + abs_y) / (abs_y - x);
angle = coeff_2 - coeff_1 * r;
}
return (y < 0.0f) ? -angle : angle;
}
public:
virtual bool setup(real_t p_step) override { return false; }
virtual bool pre_solve(real_t p_step) override { return true; }
virtual void solve(real_t p_step) override {}
void copy_settings_from(GodotJoint3D *p_joint) {
set_self(p_joint->get_self());
set_priority(p_joint->get_priority());
disable_collisions_between_bodies(p_joint->is_disabled_collisions_between_bodies());
}
virtual PhysicsServer3D::JointType get_type() const { return PhysicsServer3D::JOINT_TYPE_MAX; }
_FORCE_INLINE_ GodotJoint3D(GodotBody3D **p_body_ptr = nullptr, int p_body_count = 0) :
GodotConstraint3D(p_body_ptr, p_body_count) {
}
virtual ~GodotJoint3D() {
for (int i = 0; i < get_body_count(); i++) {
GodotBody3D *body = get_body_ptr()[i];
if (body) {
body->remove_constraint(this);
}
}
}
};
#endif // GODOT_JOINT_3D_H