9c9e528e3e
Removing the + 1 in point gravity formula when using distance scale to make it more accurate for standard gravitation. Fixes precession in orbits for games using gravitation. Also moved gravity calculation to area to use it for both rigid bodies and soft bodies in 3D (same change in 2D for consistency). Co-authored-by: Ryan Peach <ryan.peach@keysight.com>
347 lines
11 KiB
C++
347 lines
11 KiB
C++
/*************************************************************************/
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/* area_3d_sw.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) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 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 "area_3d_sw.h"
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#include "body_3d_sw.h"
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#include "soft_body_3d_sw.h"
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#include "space_3d_sw.h"
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Area3DSW::BodyKey::BodyKey(SoftBody3DSW *p_body, uint32_t p_body_shape, uint32_t p_area_shape) {
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rid = p_body->get_self();
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instance_id = p_body->get_instance_id();
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body_shape = p_body_shape;
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area_shape = p_area_shape;
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}
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Area3DSW::BodyKey::BodyKey(Body3DSW *p_body, uint32_t p_body_shape, uint32_t p_area_shape) {
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rid = p_body->get_self();
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instance_id = p_body->get_instance_id();
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body_shape = p_body_shape;
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area_shape = p_area_shape;
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}
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Area3DSW::BodyKey::BodyKey(Area3DSW *p_body, uint32_t p_body_shape, uint32_t p_area_shape) {
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rid = p_body->get_self();
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instance_id = p_body->get_instance_id();
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body_shape = p_body_shape;
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area_shape = p_area_shape;
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}
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void Area3DSW::_shapes_changed() {
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if (!moved_list.in_list() && get_space()) {
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get_space()->area_add_to_moved_list(&moved_list);
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}
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}
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void Area3DSW::set_transform(const Transform3D &p_transform) {
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if (!moved_list.in_list() && get_space()) {
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get_space()->area_add_to_moved_list(&moved_list);
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}
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_set_transform(p_transform);
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_set_inv_transform(p_transform.affine_inverse());
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}
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void Area3DSW::set_space(Space3DSW *p_space) {
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if (get_space()) {
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if (monitor_query_list.in_list()) {
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get_space()->area_remove_from_monitor_query_list(&monitor_query_list);
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}
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if (moved_list.in_list()) {
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get_space()->area_remove_from_moved_list(&moved_list);
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}
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}
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monitored_bodies.clear();
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monitored_areas.clear();
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_set_space(p_space);
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}
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void Area3DSW::set_monitor_callback(ObjectID p_id, const StringName &p_method) {
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if (p_id == monitor_callback_id) {
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monitor_callback_method = p_method;
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return;
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}
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_unregister_shapes();
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monitor_callback_id = p_id;
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monitor_callback_method = p_method;
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monitored_bodies.clear();
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monitored_areas.clear();
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_shape_changed();
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if (!moved_list.in_list() && get_space()) {
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get_space()->area_add_to_moved_list(&moved_list);
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}
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}
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void Area3DSW::set_area_monitor_callback(ObjectID p_id, const StringName &p_method) {
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if (p_id == area_monitor_callback_id) {
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area_monitor_callback_method = p_method;
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return;
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}
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_unregister_shapes();
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area_monitor_callback_id = p_id;
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area_monitor_callback_method = p_method;
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monitored_bodies.clear();
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monitored_areas.clear();
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_shape_changed();
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if (!moved_list.in_list() && get_space()) {
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get_space()->area_add_to_moved_list(&moved_list);
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}
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}
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void Area3DSW::set_space_override_mode(PhysicsServer3D::AreaSpaceOverrideMode p_mode) {
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bool do_override = p_mode != PhysicsServer3D::AREA_SPACE_OVERRIDE_DISABLED;
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if (do_override == (space_override_mode != PhysicsServer3D::AREA_SPACE_OVERRIDE_DISABLED)) {
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return;
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}
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_unregister_shapes();
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space_override_mode = p_mode;
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_shape_changed();
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}
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void Area3DSW::set_param(PhysicsServer3D::AreaParameter p_param, const Variant &p_value) {
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switch (p_param) {
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case PhysicsServer3D::AREA_PARAM_GRAVITY:
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gravity = p_value;
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break;
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case PhysicsServer3D::AREA_PARAM_GRAVITY_VECTOR:
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gravity_vector = p_value;
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break;
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case PhysicsServer3D::AREA_PARAM_GRAVITY_IS_POINT:
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gravity_is_point = p_value;
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break;
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case PhysicsServer3D::AREA_PARAM_GRAVITY_DISTANCE_SCALE:
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gravity_distance_scale = p_value;
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break;
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case PhysicsServer3D::AREA_PARAM_GRAVITY_POINT_ATTENUATION:
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point_attenuation = p_value;
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break;
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case PhysicsServer3D::AREA_PARAM_LINEAR_DAMP:
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linear_damp = p_value;
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break;
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case PhysicsServer3D::AREA_PARAM_ANGULAR_DAMP:
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angular_damp = p_value;
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break;
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case PhysicsServer3D::AREA_PARAM_PRIORITY:
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priority = p_value;
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break;
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case PhysicsServer3D::AREA_PARAM_WIND_FORCE_MAGNITUDE:
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ERR_FAIL_COND_MSG(wind_force_magnitude < 0, "Wind force magnitude must be a non-negative real number, but a negative number was specified.");
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wind_force_magnitude = p_value;
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break;
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case PhysicsServer3D::AREA_PARAM_WIND_SOURCE:
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wind_source = p_value;
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break;
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case PhysicsServer3D::AREA_PARAM_WIND_DIRECTION:
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wind_direction = p_value;
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break;
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case PhysicsServer3D::AREA_PARAM_WIND_ATTENUATION_FACTOR:
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ERR_FAIL_COND_MSG(wind_attenuation_factor < 0, "Wind attenuation factor must be a non-negative real number, but a negative number was specified.");
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wind_attenuation_factor = p_value;
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break;
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}
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}
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Variant Area3DSW::get_param(PhysicsServer3D::AreaParameter p_param) const {
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switch (p_param) {
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case PhysicsServer3D::AREA_PARAM_GRAVITY:
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return gravity;
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case PhysicsServer3D::AREA_PARAM_GRAVITY_VECTOR:
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return gravity_vector;
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case PhysicsServer3D::AREA_PARAM_GRAVITY_IS_POINT:
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return gravity_is_point;
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case PhysicsServer3D::AREA_PARAM_GRAVITY_DISTANCE_SCALE:
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return gravity_distance_scale;
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case PhysicsServer3D::AREA_PARAM_GRAVITY_POINT_ATTENUATION:
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return point_attenuation;
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case PhysicsServer3D::AREA_PARAM_LINEAR_DAMP:
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return linear_damp;
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case PhysicsServer3D::AREA_PARAM_ANGULAR_DAMP:
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return angular_damp;
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case PhysicsServer3D::AREA_PARAM_PRIORITY:
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return priority;
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case PhysicsServer3D::AREA_PARAM_WIND_FORCE_MAGNITUDE:
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return wind_force_magnitude;
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case PhysicsServer3D::AREA_PARAM_WIND_SOURCE:
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return wind_source;
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case PhysicsServer3D::AREA_PARAM_WIND_DIRECTION:
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return wind_direction;
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case PhysicsServer3D::AREA_PARAM_WIND_ATTENUATION_FACTOR:
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return wind_attenuation_factor;
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}
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return Variant();
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}
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void Area3DSW::_queue_monitor_update() {
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ERR_FAIL_COND(!get_space());
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if (!monitor_query_list.in_list()) {
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get_space()->area_add_to_monitor_query_list(&monitor_query_list);
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}
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}
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void Area3DSW::set_monitorable(bool p_monitorable) {
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if (monitorable == p_monitorable) {
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return;
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}
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monitorable = p_monitorable;
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_set_static(!monitorable);
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}
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void Area3DSW::call_queries() {
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if (monitor_callback_id.is_valid() && !monitored_bodies.is_empty()) {
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Variant res[5];
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Variant *resptr[5];
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for (int i = 0; i < 5; i++) {
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resptr[i] = &res[i];
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}
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Object *obj = ObjectDB::get_instance(monitor_callback_id);
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if (!obj) {
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monitored_bodies.clear();
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monitor_callback_id = ObjectID();
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return;
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}
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for (Map<BodyKey, BodyState>::Element *E = monitored_bodies.front(); E;) {
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if (E->get().state == 0) { // Nothing happened
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Map<BodyKey, BodyState>::Element *next = E->next();
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monitored_bodies.erase(E);
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E = next;
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continue;
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}
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res[0] = E->get().state > 0 ? PhysicsServer3D::AREA_BODY_ADDED : PhysicsServer3D::AREA_BODY_REMOVED;
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res[1] = E->key().rid;
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res[2] = E->key().instance_id;
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res[3] = E->key().body_shape;
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res[4] = E->key().area_shape;
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Map<BodyKey, BodyState>::Element *next = E->next();
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monitored_bodies.erase(E);
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E = next;
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Callable::CallError ce;
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obj->call(monitor_callback_method, (const Variant **)resptr, 5, ce);
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}
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}
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if (area_monitor_callback_id.is_valid() && !monitored_areas.is_empty()) {
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Variant res[5];
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Variant *resptr[5];
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for (int i = 0; i < 5; i++) {
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resptr[i] = &res[i];
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}
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Object *obj = ObjectDB::get_instance(area_monitor_callback_id);
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if (!obj) {
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monitored_areas.clear();
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area_monitor_callback_id = ObjectID();
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return;
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}
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for (Map<BodyKey, BodyState>::Element *E = monitored_areas.front(); E;) {
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if (E->get().state == 0) { // Nothing happened
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Map<BodyKey, BodyState>::Element *next = E->next();
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monitored_areas.erase(E);
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E = next;
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continue;
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}
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res[0] = E->get().state > 0 ? PhysicsServer3D::AREA_BODY_ADDED : PhysicsServer3D::AREA_BODY_REMOVED;
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res[1] = E->key().rid;
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res[2] = E->key().instance_id;
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res[3] = E->key().body_shape;
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res[4] = E->key().area_shape;
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Map<BodyKey, BodyState>::Element *next = E->next();
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monitored_areas.erase(E);
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E = next;
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Callable::CallError ce;
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obj->call(area_monitor_callback_method, (const Variant **)resptr, 5, ce);
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}
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}
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}
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void Area3DSW::compute_gravity(const Vector3 &p_position, Vector3 &r_gravity) const {
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if (is_gravity_point()) {
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const real_t gravity_distance_scale = get_gravity_distance_scale();
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Vector3 v = get_transform().xform(get_gravity_vector()) - p_position;
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if (gravity_distance_scale > 0) {
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const real_t v_length = v.length();
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if (v_length > 0) {
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const real_t v_scaled = v_length * gravity_distance_scale;
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r_gravity = (v.normalized() * (get_gravity() / (v_scaled * v_scaled)));
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} else {
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r_gravity = Vector3();
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}
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} else {
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r_gravity = v.normalized() * get_gravity();
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}
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} else {
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r_gravity = get_gravity_vector() * get_gravity();
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}
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}
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Area3DSW::Area3DSW() :
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CollisionObject3DSW(TYPE_AREA),
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monitor_query_list(this),
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moved_list(this) {
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_set_static(true); //areas are never active
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space_override_mode = PhysicsServer3D::AREA_SPACE_OVERRIDE_DISABLED;
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gravity = 9.80665;
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gravity_vector = Vector3(0, -1, 0);
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gravity_is_point = false;
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gravity_distance_scale = 0;
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point_attenuation = 1;
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angular_damp = 0.1;
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linear_damp = 0.1;
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priority = 0;
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set_ray_pickable(false);
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monitorable = false;
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}
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Area3DSW::~Area3DSW() {
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}
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