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godot/scene/2d/joints_2d.cpp
Rémi Verschelde a7f49ac9a1 Update copyright statements to 2020 
Happy new year to the wonderful Godot community!

We're starting a new decade with a well-established, non-profit, free
and open source game engine, and tons of further improvements in the
pipeline from hundreds of contributors.

Godot will keep getting better, and we're looking forward to all the
games that the community will keep developing and releasing with it.
2020-01-01 11:16:22 +01:00

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/*************************************************************************/
/* joints_2d.cpp */
/*************************************************************************/
/* 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. */
/*************************************************************************/
#include "joints_2d.h"
#include "core/engine.h"
#include "physics_body_2d.h"
#include "servers/physics_2d_server.h"
void Joint2D::_update_joint(bool p_only_free) {
if (joint.is_valid()) {
if (ba.is_valid() && bb.is_valid() && exclude_from_collision)
Physics2DServer::get_singleton()->joint_disable_collisions_between_bodies(joint, false);
Physics2DServer::get_singleton()->free(joint);
joint = RID();
ba = RID();
bb = RID();
}
if (p_only_free || !is_inside_tree())
return;
Node *node_a = has_node(get_node_a()) ? get_node(get_node_a()) : (Node *)NULL;
Node *node_b = has_node(get_node_b()) ? get_node(get_node_b()) : (Node *)NULL;
if (!node_a || !node_b)
return;
PhysicsBody2D *body_a = Object::cast_to<PhysicsBody2D>(node_a);
PhysicsBody2D *body_b = Object::cast_to<PhysicsBody2D>(node_b);
if (!body_a || !body_b)
return;
joint = _configure_joint(body_a, body_b);
if (!joint.is_valid())
return;
Physics2DServer::get_singleton()->get_singleton()->joint_set_param(joint, Physics2DServer::JOINT_PARAM_BIAS, bias);
ba = body_a->get_rid();
bb = body_b->get_rid();
Physics2DServer::get_singleton()->joint_disable_collisions_between_bodies(joint, exclude_from_collision);
}
void Joint2D::set_node_a(const NodePath &p_node_a) {
if (a == p_node_a)
return;
a = p_node_a;
_update_joint();
}
NodePath Joint2D::get_node_a() const {
return a;
}
void Joint2D::set_node_b(const NodePath &p_node_b) {
if (b == p_node_b)
return;
b = p_node_b;
_update_joint();
}
NodePath Joint2D::get_node_b() const {
return b;
}
void Joint2D::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_READY: {
_update_joint();
} break;
case NOTIFICATION_EXIT_TREE: {
if (joint.is_valid()) {
_update_joint(true);
}
} break;
}
}
void Joint2D::set_bias(real_t p_bias) {
bias = p_bias;
if (joint.is_valid())
Physics2DServer::get_singleton()->get_singleton()->joint_set_param(joint, Physics2DServer::JOINT_PARAM_BIAS, bias);
}
real_t Joint2D::get_bias() const {
return bias;
}
void Joint2D::set_exclude_nodes_from_collision(bool p_enable) {
if (exclude_from_collision == p_enable)
return;
_update_joint(true);
exclude_from_collision = p_enable;
_update_joint();
}
bool Joint2D::get_exclude_nodes_from_collision() const {
return exclude_from_collision;
}
void Joint2D::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_node_a", "node"), &Joint2D::set_node_a);
ClassDB::bind_method(D_METHOD("get_node_a"), &Joint2D::get_node_a);
ClassDB::bind_method(D_METHOD("set_node_b", "node"), &Joint2D::set_node_b);
ClassDB::bind_method(D_METHOD("get_node_b"), &Joint2D::get_node_b);
ClassDB::bind_method(D_METHOD("set_bias", "bias"), &Joint2D::set_bias);
ClassDB::bind_method(D_METHOD("get_bias"), &Joint2D::get_bias);
ClassDB::bind_method(D_METHOD("set_exclude_nodes_from_collision", "enable"), &Joint2D::set_exclude_nodes_from_collision);
ClassDB::bind_method(D_METHOD("get_exclude_nodes_from_collision"), &Joint2D::get_exclude_nodes_from_collision);
ADD_PROPERTY(PropertyInfo(Variant::NODE_PATH, "node_a", PROPERTY_HINT_NODE_PATH_VALID_TYPES, "CollisionObject2D"), "set_node_a", "get_node_a");
ADD_PROPERTY(PropertyInfo(Variant::NODE_PATH, "node_b", PROPERTY_HINT_NODE_PATH_VALID_TYPES, "CollisionObject2D"), "set_node_b", "get_node_b");
ADD_PROPERTY(PropertyInfo(Variant::REAL, "bias", PROPERTY_HINT_RANGE, "0,0.9,0.001"), "set_bias", "get_bias");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "disable_collision"), "set_exclude_nodes_from_collision", "get_exclude_nodes_from_collision");
}
Joint2D::Joint2D() {
bias = 0;
exclude_from_collision = true;
}
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
void PinJoint2D::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_DRAW: {
if (!is_inside_tree())
break;
if (!Engine::get_singleton()->is_editor_hint() && !get_tree()->is_debugging_collisions_hint()) {
break;
}
draw_line(Point2(-10, 0), Point2(+10, 0), Color(0.7, 0.6, 0.0, 0.5), 3);
draw_line(Point2(0, -10), Point2(0, +10), Color(0.7, 0.6, 0.0, 0.5), 3);
} break;
}
}
RID PinJoint2D::_configure_joint(PhysicsBody2D *body_a, PhysicsBody2D *body_b) {
RID pj = Physics2DServer::get_singleton()->pin_joint_create(get_global_transform().get_origin(), body_a->get_rid(), body_b ? body_b->get_rid() : RID());
Physics2DServer::get_singleton()->pin_joint_set_param(pj, Physics2DServer::PIN_JOINT_SOFTNESS, softness);
return pj;
}
void PinJoint2D::set_softness(real_t p_softness) {
softness = p_softness;
update();
if (get_joint().is_valid())
Physics2DServer::get_singleton()->pin_joint_set_param(get_joint(), Physics2DServer::PIN_JOINT_SOFTNESS, p_softness);
}
real_t PinJoint2D::get_softness() const {
return softness;
}
void PinJoint2D::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_softness", "softness"), &PinJoint2D::set_softness);
ClassDB::bind_method(D_METHOD("get_softness"), &PinJoint2D::get_softness);
ADD_PROPERTY(PropertyInfo(Variant::REAL, "softness", PROPERTY_HINT_EXP_RANGE, "0.00,16,0.01"), "set_softness", "get_softness");
}
PinJoint2D::PinJoint2D() {
softness = 0;
}
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
void GrooveJoint2D::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_DRAW: {
if (!is_inside_tree())
break;
if (!Engine::get_singleton()->is_editor_hint() && !get_tree()->is_debugging_collisions_hint()) {
break;
}
draw_line(Point2(-10, 0), Point2(+10, 0), Color(0.7, 0.6, 0.0, 0.5), 3);
draw_line(Point2(-10, length), Point2(+10, length), Color(0.7, 0.6, 0.0, 0.5), 3);
draw_line(Point2(0, 0), Point2(0, length), Color(0.7, 0.6, 0.0, 0.5), 3);
draw_line(Point2(-10, initial_offset), Point2(+10, initial_offset), Color(0.8, 0.8, 0.9, 0.5), 5);
} break;
}
}
RID GrooveJoint2D::_configure_joint(PhysicsBody2D *body_a, PhysicsBody2D *body_b) {
Transform2D gt = get_global_transform();
Vector2 groove_A1 = gt.get_origin();
Vector2 groove_A2 = gt.xform(Vector2(0, length));
Vector2 anchor_B = gt.xform(Vector2(0, initial_offset));
return Physics2DServer::get_singleton()->groove_joint_create(groove_A1, groove_A2, anchor_B, body_a->get_rid(), body_b->get_rid());
}
void GrooveJoint2D::set_length(real_t p_length) {
length = p_length;
update();
}
real_t GrooveJoint2D::get_length() const {
return length;
}
void GrooveJoint2D::set_initial_offset(real_t p_initial_offset) {
initial_offset = p_initial_offset;
update();
}
real_t GrooveJoint2D::get_initial_offset() const {
return initial_offset;
}
void GrooveJoint2D::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_length", "length"), &GrooveJoint2D::set_length);
ClassDB::bind_method(D_METHOD("get_length"), &GrooveJoint2D::get_length);
ClassDB::bind_method(D_METHOD("set_initial_offset", "offset"), &GrooveJoint2D::set_initial_offset);
ClassDB::bind_method(D_METHOD("get_initial_offset"), &GrooveJoint2D::get_initial_offset);
ADD_PROPERTY(PropertyInfo(Variant::REAL, "length", PROPERTY_HINT_EXP_RANGE, "1,65535,1"), "set_length", "get_length");
ADD_PROPERTY(PropertyInfo(Variant::REAL, "initial_offset", PROPERTY_HINT_EXP_RANGE, "1,65535,1"), "set_initial_offset", "get_initial_offset");
}
GrooveJoint2D::GrooveJoint2D() {
length = 50;
initial_offset = 25;
}
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
void DampedSpringJoint2D::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_DRAW: {
if (!is_inside_tree())
break;
if (!Engine::get_singleton()->is_editor_hint() && !get_tree()->is_debugging_collisions_hint()) {
break;
}
draw_line(Point2(-10, 0), Point2(+10, 0), Color(0.7, 0.6, 0.0, 0.5), 3);
draw_line(Point2(-10, length), Point2(+10, length), Color(0.7, 0.6, 0.0, 0.5), 3);
draw_line(Point2(0, 0), Point2(0, length), Color(0.7, 0.6, 0.0, 0.5), 3);
} break;
}
}
RID DampedSpringJoint2D::_configure_joint(PhysicsBody2D *body_a, PhysicsBody2D *body_b) {
Transform2D gt = get_global_transform();
Vector2 anchor_A = gt.get_origin();
Vector2 anchor_B = gt.xform(Vector2(0, length));
RID dsj = Physics2DServer::get_singleton()->damped_spring_joint_create(anchor_A, anchor_B, body_a->get_rid(), body_b->get_rid());
if (rest_length)
Physics2DServer::get_singleton()->damped_string_joint_set_param(dsj, Physics2DServer::DAMPED_STRING_REST_LENGTH, rest_length);
Physics2DServer::get_singleton()->damped_string_joint_set_param(dsj, Physics2DServer::DAMPED_STRING_STIFFNESS, stiffness);
Physics2DServer::get_singleton()->damped_string_joint_set_param(dsj, Physics2DServer::DAMPED_STRING_DAMPING, damping);
return dsj;
}
void DampedSpringJoint2D::set_length(real_t p_length) {
length = p_length;
update();
}
real_t DampedSpringJoint2D::get_length() const {
return length;
}
void DampedSpringJoint2D::set_rest_length(real_t p_rest_length) {
rest_length = p_rest_length;
update();
if (get_joint().is_valid())
Physics2DServer::get_singleton()->damped_string_joint_set_param(get_joint(), Physics2DServer::DAMPED_STRING_REST_LENGTH, p_rest_length ? p_rest_length : length);
}
real_t DampedSpringJoint2D::get_rest_length() const {
return rest_length;
}
void DampedSpringJoint2D::set_stiffness(real_t p_stiffness) {
stiffness = p_stiffness;
update();
if (get_joint().is_valid())
Physics2DServer::get_singleton()->damped_string_joint_set_param(get_joint(), Physics2DServer::DAMPED_STRING_STIFFNESS, p_stiffness);
}
real_t DampedSpringJoint2D::get_stiffness() const {
return stiffness;
}
void DampedSpringJoint2D::set_damping(real_t p_damping) {
damping = p_damping;
update();
if (get_joint().is_valid())
Physics2DServer::get_singleton()->damped_string_joint_set_param(get_joint(), Physics2DServer::DAMPED_STRING_DAMPING, p_damping);
}
real_t DampedSpringJoint2D::get_damping() const {
return damping;
}
void DampedSpringJoint2D::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_length", "length"), &DampedSpringJoint2D::set_length);
ClassDB::bind_method(D_METHOD("get_length"), &DampedSpringJoint2D::get_length);
ClassDB::bind_method(D_METHOD("set_rest_length", "rest_length"), &DampedSpringJoint2D::set_rest_length);
ClassDB::bind_method(D_METHOD("get_rest_length"), &DampedSpringJoint2D::get_rest_length);
ClassDB::bind_method(D_METHOD("set_stiffness", "stiffness"), &DampedSpringJoint2D::set_stiffness);
ClassDB::bind_method(D_METHOD("get_stiffness"), &DampedSpringJoint2D::get_stiffness);
ClassDB::bind_method(D_METHOD("set_damping", "damping"), &DampedSpringJoint2D::set_damping);
ClassDB::bind_method(D_METHOD("get_damping"), &DampedSpringJoint2D::get_damping);
ADD_PROPERTY(PropertyInfo(Variant::REAL, "length", PROPERTY_HINT_EXP_RANGE, "1,65535,1"), "set_length", "get_length");
ADD_PROPERTY(PropertyInfo(Variant::REAL, "rest_length", PROPERTY_HINT_EXP_RANGE, "0,65535,1"), "set_rest_length", "get_rest_length");
ADD_PROPERTY(PropertyInfo(Variant::REAL, "stiffness", PROPERTY_HINT_EXP_RANGE, "0.1,64,0.1"), "set_stiffness", "get_stiffness");
ADD_PROPERTY(PropertyInfo(Variant::REAL, "damping", PROPERTY_HINT_EXP_RANGE, "0.01,16,0.01"), "set_damping", "get_damping");
}
DampedSpringJoint2D::DampedSpringJoint2D() {
length = 50;
rest_length = 0;
stiffness = 20;
damping = 1;
}
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