godot/scene/resources/skeleton_modification_2d_fabrik.cpp
Rémi Verschelde d95794ec8a
One Copyright Update to rule them all
As many open source projects have started doing it, we're removing the
current year from the copyright notice, so that we don't need to bump
it every year.

It seems like only the first year of publication is technically
relevant for copyright notices, and even that seems to be something
that many companies stopped listing altogether (in a version controlled
codebase, the commits are a much better source of date of publication
than a hardcoded copyright statement).

We also now list Godot Engine contributors first as we're collectively
the current maintainers of the project, and we clarify that the
"exclusive" copyright of the co-founders covers the timespan before
opensourcing (their further contributions are included as part of Godot
Engine contributors).

Also fixed "cf." Frenchism - it's meant as "refer to / see".
2023-01-05 13:25:55 +01:00

446 lines
20 KiB
C++

/**************************************************************************/
/* skeleton_modification_2d_fabrik.cpp */
/**************************************************************************/
/* 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. */
/**************************************************************************/
#include "skeleton_modification_2d_fabrik.h"
#include "scene/2d/skeleton_2d.h"
#ifdef TOOLS_ENABLED
#include "editor/editor_settings.h"
#endif // TOOLS_ENABLED
bool SkeletonModification2DFABRIK::_set(const StringName &p_path, const Variant &p_value) {
String path = p_path;
if (path.begins_with("joint_data/")) {
int which = path.get_slicec('/', 1).to_int();
String what = path.get_slicec('/', 2);
ERR_FAIL_INDEX_V(which, fabrik_data_chain.size(), false);
if (what == "bone2d_node") {
set_fabrik_joint_bone2d_node(which, p_value);
} else if (what == "bone_index") {
set_fabrik_joint_bone_index(which, p_value);
} else if (what == "magnet_position") {
set_fabrik_joint_magnet_position(which, p_value);
} else if (what == "use_target_rotation") {
set_fabrik_joint_use_target_rotation(which, p_value);
}
}
return true;
}
bool SkeletonModification2DFABRIK::_get(const StringName &p_path, Variant &r_ret) const {
String path = p_path;
if (path.begins_with("joint_data/")) {
int which = path.get_slicec('/', 1).to_int();
String what = path.get_slicec('/', 2);
ERR_FAIL_INDEX_V(which, fabrik_data_chain.size(), false);
if (what == "bone2d_node") {
r_ret = get_fabrik_joint_bone2d_node(which);
} else if (what == "bone_index") {
r_ret = get_fabrik_joint_bone_index(which);
} else if (what == "magnet_position") {
r_ret = get_fabrik_joint_magnet_position(which);
} else if (what == "use_target_rotation") {
r_ret = get_fabrik_joint_use_target_rotation(which);
}
return true;
}
return true;
}
void SkeletonModification2DFABRIK::_get_property_list(List<PropertyInfo> *p_list) const {
for (int i = 0; i < fabrik_data_chain.size(); i++) {
String base_string = "joint_data/" + itos(i) + "/";
p_list->push_back(PropertyInfo(Variant::INT, base_string + "bone_index", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_DEFAULT));
p_list->push_back(PropertyInfo(Variant::NODE_PATH, base_string + "bone2d_node", PROPERTY_HINT_NODE_PATH_VALID_TYPES, "Bone2D", PROPERTY_USAGE_DEFAULT));
if (i > 0) {
p_list->push_back(PropertyInfo(Variant::VECTOR2, base_string + "magnet_position", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_DEFAULT));
}
if (i == fabrik_data_chain.size() - 1) {
p_list->push_back(PropertyInfo(Variant::BOOL, base_string + "use_target_rotation", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_DEFAULT));
}
}
}
void SkeletonModification2DFABRIK::_execute(float p_delta) {
ERR_FAIL_COND_MSG(!stack || !is_setup || stack->skeleton == nullptr,
"Modification is not setup and therefore cannot execute!");
if (!enabled) {
return;
}
if (target_node_cache.is_null()) {
WARN_PRINT_ONCE("Target cache is out of date. Attempting to update...");
update_target_cache();
return;
}
if (fabrik_data_chain.size() <= 1) {
ERR_PRINT_ONCE("FABRIK requires at least two joints to operate! Cannot execute modification!");
return;
}
Node2D *target = Object::cast_to<Node2D>(ObjectDB::get_instance(target_node_cache));
if (!target || !target->is_inside_tree()) {
ERR_PRINT_ONCE("Target node is not in the scene tree. Cannot execute modification!");
return;
}
target_global_pose = target->get_global_transform();
if (fabrik_data_chain[0].bone2d_node_cache.is_null() && !fabrik_data_chain[0].bone2d_node.is_empty()) {
fabrik_joint_update_bone2d_cache(0);
WARN_PRINT("Bone2D cache for origin joint is out of date. Updating...");
}
Bone2D *origin_bone2d_node = Object::cast_to<Bone2D>(ObjectDB::get_instance(fabrik_data_chain[0].bone2d_node_cache));
if (!origin_bone2d_node || !origin_bone2d_node->is_inside_tree()) {
ERR_PRINT_ONCE("Origin joint's Bone2D node is not in the scene tree. Cannot execute modification!");
return;
}
origin_global_pose = origin_bone2d_node->get_global_transform();
if (fabrik_transform_chain.size() != fabrik_data_chain.size()) {
fabrik_transform_chain.resize(fabrik_data_chain.size());
}
for (int i = 0; i < fabrik_data_chain.size(); i++) {
// Update the transform chain
if (fabrik_data_chain[i].bone2d_node_cache.is_null() && !fabrik_data_chain[i].bone2d_node.is_empty()) {
WARN_PRINT_ONCE("Bone2D cache for joint " + itos(i) + " is out of date.. Attempting to update...");
fabrik_joint_update_bone2d_cache(i);
}
Bone2D *joint_bone2d_node = Object::cast_to<Bone2D>(ObjectDB::get_instance(fabrik_data_chain[i].bone2d_node_cache));
if (!joint_bone2d_node) {
ERR_PRINT_ONCE("FABRIK Joint " + itos(i) + " does not have a Bone2D node set! Cannot execute modification!");
return;
}
fabrik_transform_chain.write[i] = joint_bone2d_node->get_global_transform();
}
Bone2D *final_bone2d_node = Object::cast_to<Bone2D>(ObjectDB::get_instance(fabrik_data_chain[fabrik_data_chain.size() - 1].bone2d_node_cache));
float final_bone2d_angle = final_bone2d_node->get_global_rotation();
if (fabrik_data_chain[fabrik_data_chain.size() - 1].use_target_rotation) {
final_bone2d_angle = target_global_pose.get_rotation();
}
Vector2 final_bone2d_direction = Vector2(Math::cos(final_bone2d_angle), Math::sin(final_bone2d_angle));
float final_bone2d_length = final_bone2d_node->get_length() * MIN(final_bone2d_node->get_global_scale().x, final_bone2d_node->get_global_scale().y);
float target_distance = (final_bone2d_node->get_global_position() + (final_bone2d_direction * final_bone2d_length)).distance_to(target->get_global_position());
chain_iterations = 0;
while (target_distance > chain_tolarance) {
chain_backwards();
chain_forwards();
final_bone2d_angle = final_bone2d_node->get_global_rotation();
if (fabrik_data_chain[fabrik_data_chain.size() - 1].use_target_rotation) {
final_bone2d_angle = target_global_pose.get_rotation();
}
final_bone2d_direction = Vector2(Math::cos(final_bone2d_angle), Math::sin(final_bone2d_angle));
target_distance = (final_bone2d_node->get_global_position() + (final_bone2d_direction * final_bone2d_length)).distance_to(target->get_global_position());
chain_iterations += 1;
if (chain_iterations >= chain_max_iterations) {
break;
}
}
// Apply all of the saved transforms to the Bone2D nodes
for (int i = 0; i < fabrik_data_chain.size(); i++) {
Bone2D *joint_bone2d_node = Object::cast_to<Bone2D>(ObjectDB::get_instance(fabrik_data_chain[i].bone2d_node_cache));
if (!joint_bone2d_node) {
ERR_PRINT_ONCE("FABRIK Joint " + itos(i) + " does not have a Bone2D node set!");
continue;
}
Transform2D chain_trans = fabrik_transform_chain[i];
// Apply rotation
if (i + 1 < fabrik_data_chain.size()) {
chain_trans = chain_trans.looking_at(fabrik_transform_chain[i + 1].get_origin());
} else {
if (fabrik_data_chain[i].use_target_rotation) {
chain_trans.set_rotation(target_global_pose.get_rotation());
} else {
chain_trans = chain_trans.looking_at(target_global_pose.get_origin());
}
}
// Adjust for the bone angle
chain_trans.set_rotation(chain_trans.get_rotation() - joint_bone2d_node->get_bone_angle());
// Reset scale
chain_trans.set_scale(joint_bone2d_node->get_global_scale());
// Apply to the bone, and to the override
joint_bone2d_node->set_global_transform(chain_trans);
stack->skeleton->set_bone_local_pose_override(fabrik_data_chain[i].bone_idx, joint_bone2d_node->get_transform(), stack->strength, true);
}
}
void SkeletonModification2DFABRIK::chain_backwards() {
int final_joint_index = fabrik_data_chain.size() - 1;
Bone2D *final_bone2d_node = Object::cast_to<Bone2D>(ObjectDB::get_instance(fabrik_data_chain[final_joint_index].bone2d_node_cache));
Transform2D final_bone2d_trans = fabrik_transform_chain[final_joint_index];
// Apply magnet position
if (final_joint_index != 0) {
final_bone2d_trans.set_origin(final_bone2d_trans.get_origin() + fabrik_data_chain[final_joint_index].magnet_position);
}
// Set the rotation of the tip bone
final_bone2d_trans = final_bone2d_trans.looking_at(target_global_pose.get_origin());
// Set the position of the tip bone
float final_bone2d_angle = final_bone2d_trans.get_rotation();
if (fabrik_data_chain[final_joint_index].use_target_rotation) {
final_bone2d_angle = target_global_pose.get_rotation();
}
Vector2 final_bone2d_direction = Vector2(Math::cos(final_bone2d_angle), Math::sin(final_bone2d_angle));
float final_bone2d_length = final_bone2d_node->get_length() * MIN(final_bone2d_node->get_global_scale().x, final_bone2d_node->get_global_scale().y);
final_bone2d_trans.set_origin(target_global_pose.get_origin() - (final_bone2d_direction * final_bone2d_length));
// Save the transform
fabrik_transform_chain.write[final_joint_index] = final_bone2d_trans;
int i = final_joint_index;
while (i >= 1) {
Transform2D previous_pose = fabrik_transform_chain[i];
i -= 1;
Bone2D *current_bone2d_node = Object::cast_to<Bone2D>(ObjectDB::get_instance(fabrik_data_chain[i].bone2d_node_cache));
Transform2D current_pose = fabrik_transform_chain[i];
// Apply magnet position
if (i != 0) {
current_pose.set_origin(current_pose.get_origin() + fabrik_data_chain[i].magnet_position);
}
float current_bone2d_node_length = current_bone2d_node->get_length() * MIN(current_bone2d_node->get_global_scale().x, current_bone2d_node->get_global_scale().y);
float length = current_bone2d_node_length / (current_pose.get_origin().distance_to(previous_pose.get_origin()));
Vector2 finish_position = previous_pose.get_origin().lerp(current_pose.get_origin(), length);
current_pose.set_origin(finish_position);
// Save the transform
fabrik_transform_chain.write[i] = current_pose;
}
}
void SkeletonModification2DFABRIK::chain_forwards() {
Transform2D origin_bone2d_trans = fabrik_transform_chain[0];
origin_bone2d_trans.set_origin(origin_global_pose.get_origin());
// Save the position
fabrik_transform_chain.write[0] = origin_bone2d_trans;
for (int i = 0; i < fabrik_data_chain.size() - 1; i++) {
Bone2D *current_bone2d_node = Object::cast_to<Bone2D>(ObjectDB::get_instance(fabrik_data_chain[i].bone2d_node_cache));
Transform2D current_pose = fabrik_transform_chain[i];
Transform2D next_pose = fabrik_transform_chain[i + 1];
float current_bone2d_node_length = current_bone2d_node->get_length() * MIN(current_bone2d_node->get_global_scale().x, current_bone2d_node->get_global_scale().y);
float length = current_bone2d_node_length / (next_pose.get_origin().distance_to(current_pose.get_origin()));
Vector2 finish_position = current_pose.get_origin().lerp(next_pose.get_origin(), length);
current_pose.set_origin(finish_position);
// Apply to the bone
fabrik_transform_chain.write[i + 1] = current_pose;
}
}
void SkeletonModification2DFABRIK::_setup_modification(SkeletonModificationStack2D *p_stack) {
stack = p_stack;
if (stack != nullptr) {
is_setup = true;
update_target_cache();
}
}
void SkeletonModification2DFABRIK::update_target_cache() {
if (!is_setup || !stack) {
ERR_PRINT_ONCE("Cannot update target cache: modification is not properly setup!");
return;
}
target_node_cache = ObjectID();
if (stack->skeleton) {
if (stack->skeleton->is_inside_tree()) {
if (stack->skeleton->has_node(target_node)) {
Node *node = stack->skeleton->get_node(target_node);
ERR_FAIL_COND_MSG(!node || stack->skeleton == node,
"Cannot update target cache: node is this modification's skeleton or cannot be found!");
ERR_FAIL_COND_MSG(!node->is_inside_tree(),
"Cannot update target cache: node is not in scene tree!");
target_node_cache = node->get_instance_id();
}
}
}
}
void SkeletonModification2DFABRIK::fabrik_joint_update_bone2d_cache(int p_joint_idx) {
ERR_FAIL_INDEX_MSG(p_joint_idx, fabrik_data_chain.size(), "Cannot update bone2d cache: joint index out of range!");
if (!is_setup || !stack) {
ERR_PRINT_ONCE("Cannot update FABRIK Bone2D cache: modification is not properly setup!");
return;
}
fabrik_data_chain.write[p_joint_idx].bone2d_node_cache = ObjectID();
if (stack->skeleton) {
if (stack->skeleton->is_inside_tree()) {
if (stack->skeleton->has_node(fabrik_data_chain[p_joint_idx].bone2d_node)) {
Node *node = stack->skeleton->get_node(fabrik_data_chain[p_joint_idx].bone2d_node);
ERR_FAIL_COND_MSG(!node || stack->skeleton == node,
"Cannot update FABRIK joint " + itos(p_joint_idx) + " Bone2D cache: node is this modification's skeleton or cannot be found!");
ERR_FAIL_COND_MSG(!node->is_inside_tree(),
"Cannot update FABRIK joint " + itos(p_joint_idx) + " Bone2D cache: node is not in scene tree!");
fabrik_data_chain.write[p_joint_idx].bone2d_node_cache = node->get_instance_id();
Bone2D *bone = Object::cast_to<Bone2D>(node);
if (bone) {
fabrik_data_chain.write[p_joint_idx].bone_idx = bone->get_index_in_skeleton();
} else {
ERR_FAIL_MSG("FABRIK joint " + itos(p_joint_idx) + " Bone2D cache: Nodepath to Bone2D is not a Bone2D node!");
}
}
}
}
}
void SkeletonModification2DFABRIK::set_target_node(const NodePath &p_target_node) {
target_node = p_target_node;
update_target_cache();
}
NodePath SkeletonModification2DFABRIK::get_target_node() const {
return target_node;
}
void SkeletonModification2DFABRIK::set_fabrik_data_chain_length(int p_length) {
fabrik_data_chain.resize(p_length);
notify_property_list_changed();
}
int SkeletonModification2DFABRIK::get_fabrik_data_chain_length() {
return fabrik_data_chain.size();
}
void SkeletonModification2DFABRIK::set_fabrik_joint_bone2d_node(int p_joint_idx, const NodePath &p_target_node) {
ERR_FAIL_INDEX_MSG(p_joint_idx, fabrik_data_chain.size(), "FABRIK joint out of range!");
fabrik_data_chain.write[p_joint_idx].bone2d_node = p_target_node;
fabrik_joint_update_bone2d_cache(p_joint_idx);
notify_property_list_changed();
}
NodePath SkeletonModification2DFABRIK::get_fabrik_joint_bone2d_node(int p_joint_idx) const {
ERR_FAIL_INDEX_V_MSG(p_joint_idx, fabrik_data_chain.size(), NodePath(), "FABRIK joint out of range!");
return fabrik_data_chain[p_joint_idx].bone2d_node;
}
void SkeletonModification2DFABRIK::set_fabrik_joint_bone_index(int p_joint_idx, int p_bone_idx) {
ERR_FAIL_INDEX_MSG(p_joint_idx, fabrik_data_chain.size(), "FABRIK joint out of range!");
ERR_FAIL_COND_MSG(p_bone_idx < 0, "Bone index is out of range: The index is too low!");
if (is_setup) {
if (stack->skeleton) {
ERR_FAIL_INDEX_MSG(p_bone_idx, stack->skeleton->get_bone_count(), "Passed-in Bone index is out of range!");
fabrik_data_chain.write[p_joint_idx].bone_idx = p_bone_idx;
fabrik_data_chain.write[p_joint_idx].bone2d_node_cache = stack->skeleton->get_bone(p_bone_idx)->get_instance_id();
fabrik_data_chain.write[p_joint_idx].bone2d_node = stack->skeleton->get_path_to(stack->skeleton->get_bone(p_bone_idx));
} else {
WARN_PRINT("Cannot verify the FABRIK joint " + itos(p_joint_idx) + " bone index for this modification...");
fabrik_data_chain.write[p_joint_idx].bone_idx = p_bone_idx;
}
} else {
WARN_PRINT("Cannot verify the FABRIK joint " + itos(p_joint_idx) + " bone index for this modification...");
fabrik_data_chain.write[p_joint_idx].bone_idx = p_bone_idx;
}
notify_property_list_changed();
}
int SkeletonModification2DFABRIK::get_fabrik_joint_bone_index(int p_joint_idx) const {
ERR_FAIL_INDEX_V_MSG(p_joint_idx, fabrik_data_chain.size(), -1, "FABRIK joint out of range!");
return fabrik_data_chain[p_joint_idx].bone_idx;
}
void SkeletonModification2DFABRIK::set_fabrik_joint_magnet_position(int p_joint_idx, Vector2 p_magnet_position) {
ERR_FAIL_INDEX_MSG(p_joint_idx, fabrik_data_chain.size(), "FABRIK joint out of range!");
fabrik_data_chain.write[p_joint_idx].magnet_position = p_magnet_position;
}
Vector2 SkeletonModification2DFABRIK::get_fabrik_joint_magnet_position(int p_joint_idx) const {
ERR_FAIL_INDEX_V_MSG(p_joint_idx, fabrik_data_chain.size(), Vector2(), "FABRIK joint out of range!");
return fabrik_data_chain[p_joint_idx].magnet_position;
}
void SkeletonModification2DFABRIK::set_fabrik_joint_use_target_rotation(int p_joint_idx, bool p_use_target_rotation) {
ERR_FAIL_INDEX_MSG(p_joint_idx, fabrik_data_chain.size(), "FABRIK joint out of range!");
fabrik_data_chain.write[p_joint_idx].use_target_rotation = p_use_target_rotation;
}
bool SkeletonModification2DFABRIK::get_fabrik_joint_use_target_rotation(int p_joint_idx) const {
ERR_FAIL_INDEX_V_MSG(p_joint_idx, fabrik_data_chain.size(), false, "FABRIK joint out of range!");
return fabrik_data_chain[p_joint_idx].use_target_rotation;
}
void SkeletonModification2DFABRIK::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_target_node", "target_nodepath"), &SkeletonModification2DFABRIK::set_target_node);
ClassDB::bind_method(D_METHOD("get_target_node"), &SkeletonModification2DFABRIK::get_target_node);
ClassDB::bind_method(D_METHOD("set_fabrik_data_chain_length", "length"), &SkeletonModification2DFABRIK::set_fabrik_data_chain_length);
ClassDB::bind_method(D_METHOD("get_fabrik_data_chain_length"), &SkeletonModification2DFABRIK::get_fabrik_data_chain_length);
ClassDB::bind_method(D_METHOD("set_fabrik_joint_bone2d_node", "joint_idx", "bone2d_nodepath"), &SkeletonModification2DFABRIK::set_fabrik_joint_bone2d_node);
ClassDB::bind_method(D_METHOD("get_fabrik_joint_bone2d_node", "joint_idx"), &SkeletonModification2DFABRIK::get_fabrik_joint_bone2d_node);
ClassDB::bind_method(D_METHOD("set_fabrik_joint_bone_index", "joint_idx", "bone_idx"), &SkeletonModification2DFABRIK::set_fabrik_joint_bone_index);
ClassDB::bind_method(D_METHOD("get_fabrik_joint_bone_index", "joint_idx"), &SkeletonModification2DFABRIK::get_fabrik_joint_bone_index);
ClassDB::bind_method(D_METHOD("set_fabrik_joint_magnet_position", "joint_idx", "magnet_position"), &SkeletonModification2DFABRIK::set_fabrik_joint_magnet_position);
ClassDB::bind_method(D_METHOD("get_fabrik_joint_magnet_position", "joint_idx"), &SkeletonModification2DFABRIK::get_fabrik_joint_magnet_position);
ClassDB::bind_method(D_METHOD("set_fabrik_joint_use_target_rotation", "joint_idx", "use_target_rotation"), &SkeletonModification2DFABRIK::set_fabrik_joint_use_target_rotation);
ClassDB::bind_method(D_METHOD("get_fabrik_joint_use_target_rotation", "joint_idx"), &SkeletonModification2DFABRIK::get_fabrik_joint_use_target_rotation);
ADD_PROPERTY(PropertyInfo(Variant::NODE_PATH, "target_nodepath", PROPERTY_HINT_NODE_PATH_VALID_TYPES, "Node2D"), "set_target_node", "get_target_node");
ADD_PROPERTY(PropertyInfo(Variant::INT, "fabrik_data_chain_length", PROPERTY_HINT_RANGE, "0, 100, 1"), "set_fabrik_data_chain_length", "get_fabrik_data_chain_length");
}
SkeletonModification2DFABRIK::SkeletonModification2DFABRIK() {
stack = nullptr;
is_setup = false;
enabled = true;
editor_draw_gizmo = false;
}
SkeletonModification2DFABRIK::~SkeletonModification2DFABRIK() {
}