godot/servers/physics_2d/joints_2d_sw.h

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/*************************************************************************/
/* joints_2d_sw.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
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/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
/* 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. */
/*************************************************************************/
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#ifndef JOINTS_2D_SW_H
#define JOINTS_2D_SW_H
#include "body_2d_sw.h"
#include "constraint_2d_sw.h"
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class Joint2DSW : public Constraint2DSW {
real_t max_force;
real_t bias;
real_t max_bias;
public:
_FORCE_INLINE_ void set_max_force(real_t p_force) { max_force = p_force; }
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_FORCE_INLINE_ real_t get_max_force() const { return max_force; }
_FORCE_INLINE_ void set_bias(real_t p_bias) { bias = p_bias; }
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_FORCE_INLINE_ real_t get_bias() const { return bias; }
_FORCE_INLINE_ void set_max_bias(real_t p_bias) { max_bias = p_bias; }
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_FORCE_INLINE_ real_t get_max_bias() const { return max_bias; }
virtual PhysicsServer2D::JointType get_type() const = 0;
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Joint2DSW(Body2DSW **p_body_ptr = nullptr, int p_body_count = 0) :
Constraint2DSW(p_body_ptr, p_body_count) {
bias = 0;
max_force = max_bias = 3.40282e+38;
};
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};
class PinJoint2DSW : public Joint2DSW {
union {
struct {
Body2DSW *A;
Body2DSW *B;
};
Body2DSW *_arr[2];
};
Transform2D M;
Vector2 rA, rB;
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Vector2 anchor_A;
Vector2 anchor_B;
Vector2 bias;
Vector2 P;
real_t softness;
public:
virtual PhysicsServer2D::JointType get_type() const { return PhysicsServer2D::JOINT_PIN; }
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virtual bool setup(real_t p_step);
virtual void solve(real_t p_step);
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void set_param(PhysicsServer2D::PinJointParam p_param, real_t p_value);
real_t get_param(PhysicsServer2D::PinJointParam p_param) const;
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PinJoint2DSW(const Vector2 &p_pos, Body2DSW *p_body_a, Body2DSW *p_body_b = nullptr);
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~PinJoint2DSW();
};
class GrooveJoint2DSW : public Joint2DSW {
union {
struct {
Body2DSW *A;
Body2DSW *B;
};
Body2DSW *_arr[2];
};
Vector2 A_groove_1;
Vector2 A_groove_2;
Vector2 A_groove_normal;
Vector2 B_anchor;
Vector2 jn_acc;
Vector2 gbias;
real_t jn_max;
real_t clamp;
Vector2 xf_normal;
Vector2 rA, rB;
Vector2 k1, k2;
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bool correct;
public:
virtual PhysicsServer2D::JointType get_type() const { return PhysicsServer2D::JOINT_GROOVE; }
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virtual bool setup(real_t p_step);
virtual void solve(real_t p_step);
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GrooveJoint2DSW(const Vector2 &p_a_groove1, const Vector2 &p_a_groove2, const Vector2 &p_b_anchor, Body2DSW *p_body_a, Body2DSW *p_body_b);
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~GrooveJoint2DSW();
};
class DampedSpringJoint2DSW : public Joint2DSW {
union {
struct {
Body2DSW *A;
Body2DSW *B;
};
Body2DSW *_arr[2];
};
Vector2 anchor_A;
Vector2 anchor_B;
real_t rest_length;
real_t damping;
real_t stiffness;
Vector2 rA, rB;
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Vector2 n;
real_t n_mass;
real_t target_vrn;
real_t v_coef;
public:
virtual PhysicsServer2D::JointType get_type() const { return PhysicsServer2D::JOINT_DAMPED_SPRING; }
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virtual bool setup(real_t p_step);
virtual void solve(real_t p_step);
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void set_param(PhysicsServer2D::DampedSpringParam p_param, real_t p_value);
real_t get_param(PhysicsServer2D::DampedSpringParam p_param) const;
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DampedSpringJoint2DSW(const Vector2 &p_anchor_a, const Vector2 &p_anchor_b, Body2DSW *p_body_a, Body2DSW *p_body_b);
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~DampedSpringJoint2DSW();
};
#endif // JOINTS_2D_SW_H