1fccf78dd2
Body transforms from physics are used to setup the joint and they are
only updated before the physics step by default.
Without forcing the transform update, joints could use a previous
position if the body's position was set after it was added to the scene.
3D physics is not affected by this issue.
(cherry picked from commit 11bee25de4)
460 lines
15 KiB
C++
460 lines
15 KiB
C++
/*************************************************************************/
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/* joints_2d.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "joints_2d.h"
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#include "core/engine.h"
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#include "physics_body_2d.h"
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#include "servers/physics_2d_server.h"
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void Joint2D::_update_joint(bool p_only_free) {
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if (joint.is_valid()) {
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if (ba.is_valid() && bb.is_valid() && exclude_from_collision)
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Physics2DServer::get_singleton()->joint_disable_collisions_between_bodies(joint, false);
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Physics2DServer::get_singleton()->free(joint);
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joint = RID();
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ba = RID();
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bb = RID();
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}
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if (p_only_free || !is_inside_tree()) {
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warning = String();
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return;
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}
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Node *node_a = has_node(get_node_a()) ? get_node(get_node_a()) : (Node *)NULL;
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Node *node_b = has_node(get_node_b()) ? get_node(get_node_b()) : (Node *)NULL;
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PhysicsBody2D *body_a = Object::cast_to<PhysicsBody2D>(node_a);
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PhysicsBody2D *body_b = Object::cast_to<PhysicsBody2D>(node_b);
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if (node_a && !body_a && node_b && !body_b) {
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warning = TTR("Node A and Node B must be PhysicsBody2Ds");
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update_configuration_warning();
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return;
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}
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if (node_a && !body_a) {
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warning = TTR("Node A must be a PhysicsBody2D");
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update_configuration_warning();
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return;
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}
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if (node_b && !body_b) {
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warning = TTR("Node B must be a PhysicsBody2D");
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update_configuration_warning();
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return;
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}
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if (!body_a || !body_b) {
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warning = TTR("Joint is not connected to two PhysicsBody2Ds");
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update_configuration_warning();
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return;
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}
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if (body_a == body_b) {
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warning = TTR("Node A and Node B must be different PhysicsBody2Ds");
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update_configuration_warning();
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return;
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}
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warning = String();
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update_configuration_warning();
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if (body_a) {
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body_a->force_update_transform();
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}
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if (body_b) {
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body_b->force_update_transform();
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}
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joint = _configure_joint(body_a, body_b);
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ERR_FAIL_COND_MSG(!joint.is_valid(), "Failed to configure the joint.");
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Physics2DServer::get_singleton()->get_singleton()->joint_set_param(joint, Physics2DServer::JOINT_PARAM_BIAS, bias);
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ba = body_a->get_rid();
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bb = body_b->get_rid();
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Physics2DServer::get_singleton()->joint_disable_collisions_between_bodies(joint, exclude_from_collision);
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}
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void Joint2D::set_node_a(const NodePath &p_node_a) {
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if (a == p_node_a)
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return;
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a = p_node_a;
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_update_joint();
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}
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NodePath Joint2D::get_node_a() const {
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return a;
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}
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void Joint2D::set_node_b(const NodePath &p_node_b) {
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if (b == p_node_b)
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return;
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b = p_node_b;
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_update_joint();
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}
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NodePath Joint2D::get_node_b() const {
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return b;
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}
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void Joint2D::_notification(int p_what) {
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switch (p_what) {
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case NOTIFICATION_READY: {
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_update_joint();
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} break;
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case NOTIFICATION_EXIT_TREE: {
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if (joint.is_valid()) {
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_update_joint(true);
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}
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} break;
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}
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}
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void Joint2D::set_bias(real_t p_bias) {
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bias = p_bias;
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if (joint.is_valid())
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Physics2DServer::get_singleton()->get_singleton()->joint_set_param(joint, Physics2DServer::JOINT_PARAM_BIAS, bias);
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}
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real_t Joint2D::get_bias() const {
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return bias;
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}
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void Joint2D::set_exclude_nodes_from_collision(bool p_enable) {
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if (exclude_from_collision == p_enable)
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return;
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_update_joint(true);
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exclude_from_collision = p_enable;
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_update_joint();
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}
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bool Joint2D::get_exclude_nodes_from_collision() const {
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return exclude_from_collision;
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}
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String Joint2D::get_configuration_warning() const {
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String node_warning = Node2D::get_configuration_warning();
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if (!warning.empty()) {
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if (!node_warning.empty()) {
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node_warning += "\n\n";
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}
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node_warning += warning;
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}
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return node_warning;
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}
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void Joint2D::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_node_a", "node"), &Joint2D::set_node_a);
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ClassDB::bind_method(D_METHOD("get_node_a"), &Joint2D::get_node_a);
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ClassDB::bind_method(D_METHOD("set_node_b", "node"), &Joint2D::set_node_b);
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ClassDB::bind_method(D_METHOD("get_node_b"), &Joint2D::get_node_b);
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ClassDB::bind_method(D_METHOD("set_bias", "bias"), &Joint2D::set_bias);
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ClassDB::bind_method(D_METHOD("get_bias"), &Joint2D::get_bias);
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ClassDB::bind_method(D_METHOD("set_exclude_nodes_from_collision", "enable"), &Joint2D::set_exclude_nodes_from_collision);
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ClassDB::bind_method(D_METHOD("get_exclude_nodes_from_collision"), &Joint2D::get_exclude_nodes_from_collision);
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ADD_PROPERTY(PropertyInfo(Variant::NODE_PATH, "node_a", PROPERTY_HINT_NODE_PATH_VALID_TYPES, "PhysicsBody2D"), "set_node_a", "get_node_a");
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ADD_PROPERTY(PropertyInfo(Variant::NODE_PATH, "node_b", PROPERTY_HINT_NODE_PATH_VALID_TYPES, "PhysicsBody2D"), "set_node_b", "get_node_b");
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ADD_PROPERTY(PropertyInfo(Variant::REAL, "bias", PROPERTY_HINT_RANGE, "0,0.9,0.001"), "set_bias", "get_bias");
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ADD_PROPERTY(PropertyInfo(Variant::BOOL, "disable_collision"), "set_exclude_nodes_from_collision", "get_exclude_nodes_from_collision");
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}
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Joint2D::Joint2D() {
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bias = 0;
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exclude_from_collision = true;
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}
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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void PinJoint2D::_notification(int p_what) {
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switch (p_what) {
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case NOTIFICATION_DRAW: {
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if (!is_inside_tree())
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break;
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if (!Engine::get_singleton()->is_editor_hint() && !get_tree()->is_debugging_collisions_hint()) {
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break;
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}
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draw_line(Point2(-10, 0), Point2(+10, 0), Color(0.7, 0.6, 0.0, 0.5), 3);
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draw_line(Point2(0, -10), Point2(0, +10), Color(0.7, 0.6, 0.0, 0.5), 3);
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} break;
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}
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}
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RID PinJoint2D::_configure_joint(PhysicsBody2D *body_a, PhysicsBody2D *body_b) {
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RID pj = Physics2DServer::get_singleton()->pin_joint_create(get_global_transform().get_origin(), body_a->get_rid(), body_b ? body_b->get_rid() : RID());
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Physics2DServer::get_singleton()->pin_joint_set_param(pj, Physics2DServer::PIN_JOINT_SOFTNESS, softness);
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return pj;
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}
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void PinJoint2D::set_softness(real_t p_softness) {
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softness = p_softness;
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update();
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if (get_joint().is_valid())
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Physics2DServer::get_singleton()->pin_joint_set_param(get_joint(), Physics2DServer::PIN_JOINT_SOFTNESS, p_softness);
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}
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real_t PinJoint2D::get_softness() const {
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return softness;
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}
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void PinJoint2D::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_softness", "softness"), &PinJoint2D::set_softness);
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ClassDB::bind_method(D_METHOD("get_softness"), &PinJoint2D::get_softness);
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ADD_PROPERTY(PropertyInfo(Variant::REAL, "softness", PROPERTY_HINT_EXP_RANGE, "0.00,16,0.01"), "set_softness", "get_softness");
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}
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PinJoint2D::PinJoint2D() {
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softness = 0;
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}
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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void GrooveJoint2D::_notification(int p_what) {
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switch (p_what) {
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case NOTIFICATION_DRAW: {
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if (!is_inside_tree())
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break;
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if (!Engine::get_singleton()->is_editor_hint() && !get_tree()->is_debugging_collisions_hint()) {
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break;
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}
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draw_line(Point2(-10, 0), Point2(+10, 0), Color(0.7, 0.6, 0.0, 0.5), 3);
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draw_line(Point2(-10, length), Point2(+10, length), Color(0.7, 0.6, 0.0, 0.5), 3);
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draw_line(Point2(0, 0), Point2(0, length), Color(0.7, 0.6, 0.0, 0.5), 3);
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draw_line(Point2(-10, initial_offset), Point2(+10, initial_offset), Color(0.8, 0.8, 0.9, 0.5), 5);
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} break;
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}
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}
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RID GrooveJoint2D::_configure_joint(PhysicsBody2D *body_a, PhysicsBody2D *body_b) {
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Transform2D gt = get_global_transform();
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Vector2 groove_A1 = gt.get_origin();
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Vector2 groove_A2 = gt.xform(Vector2(0, length));
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Vector2 anchor_B = gt.xform(Vector2(0, initial_offset));
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return Physics2DServer::get_singleton()->groove_joint_create(groove_A1, groove_A2, anchor_B, body_a->get_rid(), body_b->get_rid());
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}
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void GrooveJoint2D::set_length(real_t p_length) {
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length = p_length;
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update();
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}
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real_t GrooveJoint2D::get_length() const {
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return length;
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}
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void GrooveJoint2D::set_initial_offset(real_t p_initial_offset) {
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initial_offset = p_initial_offset;
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update();
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}
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real_t GrooveJoint2D::get_initial_offset() const {
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return initial_offset;
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}
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void GrooveJoint2D::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_length", "length"), &GrooveJoint2D::set_length);
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ClassDB::bind_method(D_METHOD("get_length"), &GrooveJoint2D::get_length);
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ClassDB::bind_method(D_METHOD("set_initial_offset", "offset"), &GrooveJoint2D::set_initial_offset);
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ClassDB::bind_method(D_METHOD("get_initial_offset"), &GrooveJoint2D::get_initial_offset);
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ADD_PROPERTY(PropertyInfo(Variant::REAL, "length", PROPERTY_HINT_EXP_RANGE, "1,65535,1"), "set_length", "get_length");
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ADD_PROPERTY(PropertyInfo(Variant::REAL, "initial_offset", PROPERTY_HINT_EXP_RANGE, "1,65535,1"), "set_initial_offset", "get_initial_offset");
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}
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GrooveJoint2D::GrooveJoint2D() {
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length = 50;
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initial_offset = 25;
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}
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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void DampedSpringJoint2D::_notification(int p_what) {
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switch (p_what) {
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case NOTIFICATION_DRAW: {
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if (!is_inside_tree())
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break;
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if (!Engine::get_singleton()->is_editor_hint() && !get_tree()->is_debugging_collisions_hint()) {
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break;
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}
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draw_line(Point2(-10, 0), Point2(+10, 0), Color(0.7, 0.6, 0.0, 0.5), 3);
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draw_line(Point2(-10, length), Point2(+10, length), Color(0.7, 0.6, 0.0, 0.5), 3);
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draw_line(Point2(0, 0), Point2(0, length), Color(0.7, 0.6, 0.0, 0.5), 3);
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} break;
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}
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}
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RID DampedSpringJoint2D::_configure_joint(PhysicsBody2D *body_a, PhysicsBody2D *body_b) {
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Transform2D gt = get_global_transform();
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Vector2 anchor_A = gt.get_origin();
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Vector2 anchor_B = gt.xform(Vector2(0, length));
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RID dsj = Physics2DServer::get_singleton()->damped_spring_joint_create(anchor_A, anchor_B, body_a->get_rid(), body_b->get_rid());
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if (rest_length)
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Physics2DServer::get_singleton()->damped_string_joint_set_param(dsj, Physics2DServer::DAMPED_STRING_REST_LENGTH, rest_length);
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Physics2DServer::get_singleton()->damped_string_joint_set_param(dsj, Physics2DServer::DAMPED_STRING_STIFFNESS, stiffness);
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Physics2DServer::get_singleton()->damped_string_joint_set_param(dsj, Physics2DServer::DAMPED_STRING_DAMPING, damping);
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return dsj;
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}
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void DampedSpringJoint2D::set_length(real_t p_length) {
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length = p_length;
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update();
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}
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real_t DampedSpringJoint2D::get_length() const {
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return length;
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}
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void DampedSpringJoint2D::set_rest_length(real_t p_rest_length) {
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rest_length = p_rest_length;
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update();
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if (get_joint().is_valid())
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Physics2DServer::get_singleton()->damped_string_joint_set_param(get_joint(), Physics2DServer::DAMPED_STRING_REST_LENGTH, p_rest_length ? p_rest_length : length);
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}
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real_t DampedSpringJoint2D::get_rest_length() const {
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return rest_length;
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}
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void DampedSpringJoint2D::set_stiffness(real_t p_stiffness) {
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stiffness = p_stiffness;
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update();
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if (get_joint().is_valid())
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Physics2DServer::get_singleton()->damped_string_joint_set_param(get_joint(), Physics2DServer::DAMPED_STRING_STIFFNESS, p_stiffness);
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}
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real_t DampedSpringJoint2D::get_stiffness() const {
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return stiffness;
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}
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void DampedSpringJoint2D::set_damping(real_t p_damping) {
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damping = p_damping;
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update();
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if (get_joint().is_valid())
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Physics2DServer::get_singleton()->damped_string_joint_set_param(get_joint(), Physics2DServer::DAMPED_STRING_DAMPING, p_damping);
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}
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real_t DampedSpringJoint2D::get_damping() const {
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return damping;
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}
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void DampedSpringJoint2D::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_length", "length"), &DampedSpringJoint2D::set_length);
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ClassDB::bind_method(D_METHOD("get_length"), &DampedSpringJoint2D::get_length);
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ClassDB::bind_method(D_METHOD("set_rest_length", "rest_length"), &DampedSpringJoint2D::set_rest_length);
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ClassDB::bind_method(D_METHOD("get_rest_length"), &DampedSpringJoint2D::get_rest_length);
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ClassDB::bind_method(D_METHOD("set_stiffness", "stiffness"), &DampedSpringJoint2D::set_stiffness);
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ClassDB::bind_method(D_METHOD("get_stiffness"), &DampedSpringJoint2D::get_stiffness);
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ClassDB::bind_method(D_METHOD("set_damping", "damping"), &DampedSpringJoint2D::set_damping);
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ClassDB::bind_method(D_METHOD("get_damping"), &DampedSpringJoint2D::get_damping);
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ADD_PROPERTY(PropertyInfo(Variant::REAL, "length", PROPERTY_HINT_EXP_RANGE, "1,65535,1"), "set_length", "get_length");
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ADD_PROPERTY(PropertyInfo(Variant::REAL, "rest_length", PROPERTY_HINT_EXP_RANGE, "0,65535,1"), "set_rest_length", "get_rest_length");
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ADD_PROPERTY(PropertyInfo(Variant::REAL, "stiffness", PROPERTY_HINT_EXP_RANGE, "0.1,64,0.1"), "set_stiffness", "get_stiffness");
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ADD_PROPERTY(PropertyInfo(Variant::REAL, "damping", PROPERTY_HINT_EXP_RANGE, "0.01,16,0.01"), "set_damping", "get_damping");
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}
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DampedSpringJoint2D::DampedSpringJoint2D() {
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length = 50;
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rest_length = 0;
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stiffness = 20;
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damping = 1;
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}
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