godot/scene/3d/xr_body_modifier_3d.cpp

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C++

/**************************************************************************/
/* xr_body_modifier_3d.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 "xr_body_modifier_3d.h"
#include "scene/3d/skeleton_3d.h"
#include "servers/xr/xr_pose.h"
#include "servers/xr_server.h"
void XRBodyModifier3D::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_body_tracker", "tracker_name"), &XRBodyModifier3D::set_body_tracker);
ClassDB::bind_method(D_METHOD("get_body_tracker"), &XRBodyModifier3D::get_body_tracker);
ClassDB::bind_method(D_METHOD("set_target", "target"), &XRBodyModifier3D::set_target);
ClassDB::bind_method(D_METHOD("get_target"), &XRBodyModifier3D::get_target);
ClassDB::bind_method(D_METHOD("set_body_update", "body_update"), &XRBodyModifier3D::set_body_update);
ClassDB::bind_method(D_METHOD("get_body_update"), &XRBodyModifier3D::get_body_update);
ClassDB::bind_method(D_METHOD("set_bone_update", "bone_update"), &XRBodyModifier3D::set_bone_update);
ClassDB::bind_method(D_METHOD("get_bone_update"), &XRBodyModifier3D::get_bone_update);
ClassDB::bind_method(D_METHOD("set_show_when_tracked", "show"), &XRBodyModifier3D::set_show_when_tracked);
ClassDB::bind_method(D_METHOD("get_show_when_tracked"), &XRBodyModifier3D::get_show_when_tracked);
ADD_PROPERTY(PropertyInfo(Variant::STRING, "body_tracker", PROPERTY_HINT_ENUM_SUGGESTION, "/user/body"), "set_body_tracker", "get_body_tracker");
ADD_PROPERTY(PropertyInfo(Variant::NODE_PATH, "target", PROPERTY_HINT_NODE_PATH_VALID_TYPES, "Skeleton3D"), "set_target", "get_target");
ADD_PROPERTY(PropertyInfo(Variant::INT, "body_update", PROPERTY_HINT_FLAGS, "Upper Body,Lower Body,Hands"), "set_body_update", "get_body_update");
ADD_PROPERTY(PropertyInfo(Variant::INT, "bone_update", PROPERTY_HINT_ENUM, "Full,Rotation Only"), "set_bone_update", "get_bone_update");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "show_when_tracked"), "set_show_when_tracked", "get_show_when_tracked");
BIND_BITFIELD_FLAG(BODY_UPDATE_UPPER_BODY);
BIND_BITFIELD_FLAG(BODY_UPDATE_LOWER_BODY);
BIND_BITFIELD_FLAG(BODY_UPDATE_HANDS);
BIND_ENUM_CONSTANT(BONE_UPDATE_FULL);
BIND_ENUM_CONSTANT(BONE_UPDATE_ROTATION_ONLY);
BIND_ENUM_CONSTANT(BONE_UPDATE_MAX);
}
void XRBodyModifier3D::set_body_tracker(const StringName &p_tracker_name) {
tracker_name = p_tracker_name;
}
StringName XRBodyModifier3D::get_body_tracker() const {
return tracker_name;
}
void XRBodyModifier3D::set_target(const NodePath &p_target) {
target = p_target;
if (is_inside_tree()) {
_get_joint_data();
}
}
NodePath XRBodyModifier3D::get_target() const {
return target;
}
void XRBodyModifier3D::set_body_update(BitField<BodyUpdate> p_body_update) {
body_update = p_body_update;
}
BitField<XRBodyModifier3D::BodyUpdate> XRBodyModifier3D::get_body_update() const {
return body_update;
}
void XRBodyModifier3D::set_bone_update(BoneUpdate p_bone_update) {
ERR_FAIL_INDEX(p_bone_update, BONE_UPDATE_MAX);
bone_update = p_bone_update;
}
XRBodyModifier3D::BoneUpdate XRBodyModifier3D::get_bone_update() const {
return bone_update;
}
void XRBodyModifier3D::set_show_when_tracked(bool p_show_when_tracked) {
show_when_tracked = p_show_when_tracked;
}
bool XRBodyModifier3D::get_show_when_tracked() const {
return show_when_tracked;
}
Skeleton3D *XRBodyModifier3D::get_skeleton() {
if (!has_node(target)) {
return nullptr;
}
Node *node = get_node(target);
if (!node) {
return nullptr;
}
Skeleton3D *skeleton = Object::cast_to<Skeleton3D>(node);
return skeleton;
}
void XRBodyModifier3D::_get_joint_data() {
// Table of Godot Humanoid bone names.
static const String bone_names[XRBodyTracker::JOINT_MAX] = {
"Root", // XRBodyTracker::JOINT_ROOT
// Upper Body Joints.
"Hips", // XRBodyTracker::JOINT_HIPS
"Spine", // XRBodyTracker::JOINT_SPINE
"Chest", // XRBodyTracker::JOINT_CHEST
"UpperChest", // XRBodyTracker::JOINT_UPPER_CHEST
"Neck", // XRBodyTracker::JOINT_NECK"
"Head", // XRBodyTracker::JOINT_HEAD"
"HeadTip", // XRBodyTracker::JOINT_HEAD_TIP"
"LeftShoulder", // XRBodyTracker::JOINT_LEFT_SHOULDER"
"LeftUpperArm", // XRBodyTracker::JOINT_LEFT_UPPER_ARM"
"LeftLowerArm", // XRBodyTracker::JOINT_LEFT_LOWER_ARM"
"RightShoulder", // XRBodyTracker::JOINT_RIGHT_SHOULDER"
"RightUpperArm", // XRBodyTracker::JOINT_RIGHT_UPPER_ARM"
"RightLowerArm", // XRBodyTracker::JOINT_RIGHT_LOWER_ARM"
// Lower Body Joints.
"LeftUpperLeg", // XRBodyTracker::JOINT_LEFT_UPPER_LEG
"LeftLowerLeg", // XRBodyTracker::JOINT_LEFT_LOWER_LEG
"LeftFoot", // XRBodyTracker::JOINT_LEFT_FOOT
"LeftToes", // XRBodyTracker::JOINT_LEFT_TOES
"RightUpperLeg", // XRBodyTracker::JOINT_RIGHT_UPPER_LEG
"RightLowerLeg", // XRBodyTracker::JOINT_RIGHT_LOWER_LEG
"RightFoot", // XRBodyTracker::JOINT_RIGHT_FOOT
"RightToes", // XRBodyTracker::JOINT_RIGHT_TOES
// Left Hand Joints.
"LeftHand", // XRBodyTracker::JOINT_LEFT_HAND
"LeftPalm", // XRBodyTracker::JOINT_LEFT_PALM
"LeftWrist", // XRBodyTracker::JOINT_LEFT_WRIST
"LeftThumbMetacarpal", // XRBodyTracker::JOINT_LEFT_THUMB_METACARPAL
"LeftThumbProximal", // XRBodyTracker::JOINT_LEFT_THUMB_PHALANX_PROXIMAL
"LeftThumbDistal", // XRBodyTracker::JOINT_LEFT_THUMB_PHALANX_DISTAL
"LeftThumbTip", // XRBodyTracker::JOINT_LEFT_THUMB_TIP
"LeftIndexMetacarpal", // XRBodyTracker::JOINT_LEFT_INDEX_FINGER_METACARPAL
"LeftIndexProximal", // XRBodyTracker::JOINT_LEFT_INDEX_FINGER_PHALANX_PROXIMAL
"LeftIndexIntermediate", // XRBodyTracker::JOINT_LEFT_INDEX_FINGER_PHALANX_INTERMEDIATE
"LeftIndexDistal", // XRBodyTracker::JOINT_LEFT_INDEX_FINGER_PHALANX_DISTAL
"LeftIndexTip", // XRBodyTracker::JOINT_LEFT_INDEX_FINGER_TIP
"LeftMiddleMetacarpal", // XRBodyTracker::JOINT_LEFT_MIDDLE_FINGER_METACARPAL
"LeftMiddleProximal", // XRBodyTracker::JOINT_LEFT_MIDDLE_FINGER_PHALANX_PROXIMAL
"LeftMiddleIntermediate", // XRBodyTracker::JOINT_LEFT_MIDDLE_FINGER_PHALANX_INTERMEDIATE
"LeftMiddleDistal", // XRBodyTracker::JOINT_LEFT_MIDDLE_FINGER_PHALANX_DISTAL
"LeftMiddleTip", // XRBodyTracker::JOINT_LEFT_MIDDLE_FINGER_TIP
"LeftRingMetacarpal", // XRBodyTracker::JOINT_LEFT_RING_FINGER_METACARPAL
"LeftRingProximal", // XRBodyTracker::JOINT_LEFT_RING_FINGER_PHALANX_PROXIMAL
"LeftRingIntermediate", // XRBodyTracker::JOINT_LEFT_RING_FINGER_PHALANX_INTERMEDIATE
"LeftRingDistal", // XRBodyTracker::JOINT_LEFT_RING_FINGER_PHALANX_DISTAL
"LeftRingTip", // XRBodyTracker::JOINT_LEFT_RING_FINGER_TIP
"LeftLittleMetacarpal", // XRBodyTracker::JOINT_LEFT_PINKY_FINGER_METACARPAL
"LeftLittleProximal", // XRBodyTracker::JOINT_LEFT_PINKY_FINGER_PHALANX_PROXIMAL
"LeftLittleIntermediate", // XRBodyTracker::JOINT_LEFT_PINKY_FINGER_PHALANX_INTERMEDIATE
"LeftLittleDistal", // XRBodyTracker::JOINT_LEFT_PINKY_FINGER_PHALANX_DISTAL
"LeftLittleTip", // XRBodyTracker::JOINT_LEFT_PINKY_FINGER_TIP
// Right Hand Joints.
"RightHand", // XRBodyTracker::JOINT_RIGHT_HAND
"RightPalm", // XRBodyTracker::JOINT_RIGHT_PALM
"RightWrist", // XRBodyTracker::JOINT_RIGHT_WRIST
"RightThumbMetacarpal", // XRBodyTracker::JOINT_RIGHT_THUMB_METACARPAL
"RightThumbProximal", // XRBodyTracker::JOINT_RIGHT_THUMB_PHALANX_PROXIMAL
"RightThumbDistal", // XRBodyTracker::JOINT_RIGHT_THUMB_PHALANX_DISTAL
"RightThumbTip", // XRBodyTracker::JOINT_RIGHT_THUMB_TIP
"RightIndexMetacarpal", // XRBodyTracker::JOINT_RIGHT_INDEX_FINGER_METACARPAL
"RightIndexProximal", // XRBodyTracker::JOINT_RIGHT_INDEX_FINGER_PHALANX_PROXIMAL
"RightIndexIntermediate", // XRBodyTracker::JOINT_RIGHT_INDEX_FINGER_PHALANX_INTERMEDIATE
"RightIndexDistal", // XRBodyTracker::JOINT_RIGHT_INDEX_FINGER_PHALANX_DISTAL
"RightIndexTip", // XRBodyTracker::JOINT_RIGHT_INDEX_FINGER_TIP
"RightMiddleMetacarpal", // XRBodyTracker::JOINT_RIGHT_MIDDLE_FINGER_METACARPAL
"RightMiddleProximal", // XRBodyTracker::JOINT_RIGHT_MIDDLE_FINGER_PHALANX_PROXIMAL
"RightMiddleIntermediate", // XRBodyTracker::JOINT_RIGHT_MIDDLE_FINGER_PHALANX_INTERMEDIATE
"RightMiddleDistal", // XRBodyTracker::JOINT_RIGHT_MIDDLE_FINGER_PHALANX_DISTAL
"RightMiddleTip", // XRBodyTracker::JOINT_RIGHT_MIDDLE_FINGER_TIP
"RightRingMetacarpal", // XRBodyTracker::JOINT_RIGHT_RING_FINGER_METACARPAL
"RightRingProximal", // XRBodyTracker::JOINT_RIGHT_RING_FINGER_PHALANX_PROXIMAL
"RightRingIntermediate", // XRBodyTracker::JOINT_RIGHT_RING_FINGER_PHALANX_INTERMEDIATE
"RightRingDistal", // XRBodyTracker::JOINT_RIGHT_RING_FINGER_PHALANX_DISTAL
"RightRingTip", // XRBodyTracker::JOINT_RIGHT_RING_FINGER_TIP
"RightLittleMetacarpal", // XRBodyTracker::JOINT_RIGHT_PINKY_FINGER_METACARPAL
"RightLittleProximal", // XRBodyTracker::JOINT_RIGHT_PINKY_FINGER_PHALANX_PROXIMAL
"RightLittleIntermediate", // XRBodyTracker::JOINT_RIGHT_PINKY_FINGER_PHALANX_INTERMEDIATE
"RightLittleDistal", // XRBodyTracker::JOINT_RIGHT_PINKY_FINGER_PHALANX_DISTAL
"RightLittleTip", // XRBodyTracker::JOINT_RIGHT_PINKY_FINGER_TIP
};
// reset JIC.
for (int i = 0; i < XRBodyTracker::JOINT_MAX; i++) {
joints[i].bone = -1;
joints[i].parent_joint = -1;
}
Skeleton3D *skeleton = get_skeleton();
if (!skeleton) {
return;
}
// Find the skeleton-bones associated with each joint.
int bones[XRBodyTracker::JOINT_MAX];
for (int i = 0; i < XRBodyTracker::JOINT_MAX; i++) {
// Skip upper body joints if not enabled.
if (!body_update.has_flag(BODY_UPDATE_UPPER_BODY) && i >= XRBodyTracker::JOINT_HIPS && i <= XRBodyTracker::JOINT_RIGHT_LOWER_ARM) {
bones[i] = -1;
continue;
}
// Skip lower body joints if not enabled.
if (!body_update.has_flag(BODY_UPDATE_LOWER_BODY) && i >= XRBodyTracker::JOINT_LEFT_UPPER_LEG && i <= XRBodyTracker::JOINT_RIGHT_TOES) {
bones[i] = -1;
continue;
}
// Skip hand joints if not enabled.
if (!body_update.has_flag(BODY_UPDATE_HANDS) && i >= XRBodyTracker::JOINT_LEFT_HAND && i <= XRBodyTracker::JOINT_RIGHT_PINKY_FINGER_TIP) {
bones[i] = -1;
continue;
}
// Find the skeleton bone.
bones[i] = skeleton->find_bone(bone_names[i]);
if (bones[i] == -1) {
WARN_PRINT(vformat("Couldn't obtain bone for %s", bone_names[i]));
}
}
// If the root bone is not found then use the skeleton root bone.
if (bones[XRBodyTracker::JOINT_ROOT] == -1) {
bones[XRBodyTracker::JOINT_ROOT] = 0;
}
// Assemble the joint relationship to the available skeleton bones.
for (int i = 0; i < XRBodyTracker::JOINT_MAX; i++) {
// Get the skeleton bone (skip if not found).
const int bone = bones[i];
if (bone == -1) {
continue;
}
// Find the parent skeleton-bone.
const int parent_bone = skeleton->get_bone_parent(bone);
if (parent_bone == -1) {
// If no parent skeleton-bone exists then drive this relative to the root joint.
joints[i].bone = bone;
joints[i].parent_joint = XRBodyTracker::JOINT_ROOT;
continue;
}
// Find the joint associated with the parent skeleton-bone.
for (int j = 0; j < XRBodyTracker::JOINT_MAX; ++j) {
if (bones[j] == parent_bone) {
// If a parent joint is found then drive this bone relative to it.
joints[i].bone = bone;
joints[i].parent_joint = j;
break;
}
}
}
}
void XRBodyModifier3D::_update_skeleton() {
Skeleton3D *skeleton = get_skeleton();
if (!skeleton) {
return;
}
XRServer *xr_server = XRServer::get_singleton();
if (!xr_server) {
return;
}
Ref<XRBodyTracker> tracker = xr_server->get_body_tracker(tracker_name);
if (tracker.is_null()) {
return;
}
// Handle no tracking data.
if (!tracker->get_has_tracking_data()) {
// If tracking-state determines visibility then hide the node.
if (show_when_tracked) {
set_visible(false);
}
return;
}
// Get the world and skeleton scale.
const float ws = xr_server->get_world_scale();
const float ss = skeleton->get_motion_scale();
// Read the relevant tracking data. This applies the skeleton motion scale to
// the joint transforms, allowing the tracking data to be scaled to the skeleton.
bool has_valid_data[XRBodyTracker::JOINT_MAX];
Transform3D transforms[XRBodyTracker::JOINT_MAX];
Transform3D inv_transforms[XRBodyTracker::JOINT_MAX];
for (int joint = 0; joint < XRBodyTracker::JOINT_MAX; joint++) {
BitField<XRBodyTracker::JointFlags> flags = tracker->get_joint_flags(static_cast<XRBodyTracker::Joint>(joint));
has_valid_data[joint] = flags.has_flag(XRBodyTracker::JOINT_FLAG_ORIENTATION_VALID) && flags.has_flag(XRBodyTracker::JOINT_FLAG_POSITION_VALID);
if (has_valid_data[joint]) {
transforms[joint] = tracker->get_joint_transform(static_cast<XRBodyTracker::Joint>(joint));
transforms[joint].origin *= ss;
inv_transforms[joint] = transforms[joint].inverse();
}
}
// Handle root joint not tracked.
if (!has_valid_data[XRBodyTracker::JOINT_ROOT]) {
// If tracking-state determines visibility then hide the node.
if (show_when_tracked) {
set_visible(false);
}
return;
}
// Apply the joint information to the skeleton.
for (int joint = 0; joint < XRBodyTracker::JOINT_MAX; joint++) {
// Skip if no valid joint data
if (!has_valid_data[joint]) {
continue;
}
// Get the skeleton bone (skip if none).
const int bone = joints[joint].bone;
if (bone == -1) {
continue;
}
// Calculate the relative relationship to the parent bone joint.
const int parent_joint = joints[joint].parent_joint;
const Transform3D relative_transform = inv_transforms[parent_joint] * transforms[joint];
// Update the bone position if enabled by update mode, or if the joint is the hips, to allow
// for climbing or crouching.
if (bone_update == BONE_UPDATE_FULL || joint == XRBodyTracker::JOINT_HIPS) {
skeleton->set_bone_pose_position(joints[joint].bone, relative_transform.origin);
}
// Always update the bone rotation.
skeleton->set_bone_pose_rotation(joints[joint].bone, Quaternion(relative_transform.basis));
}
// Transform to the tracking data root pose. This also applies the XR world-scale to allow
// scaling the avatars mesh and skeleton appropriately (if they are child nodes).
set_transform(
transforms[XRBodyTracker::JOINT_ROOT] * ws);
// If tracking-state determines visibility then show the node.
if (show_when_tracked) {
set_visible(true);
}
}
void XRBodyModifier3D::_tracker_changed(const StringName &p_tracker_name, const Ref<XRBodyTracker> &p_tracker) {
if (tracker_name == p_tracker_name) {
_get_joint_data();
}
}
void XRBodyModifier3D::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_ENTER_TREE: {
XRServer *xr_server = XRServer::get_singleton();
if (xr_server) {
xr_server->connect("body_tracker_added", callable_mp(this, &XRBodyModifier3D::_tracker_changed));
xr_server->connect("body_tracker_updated", callable_mp(this, &XRBodyModifier3D::_tracker_changed));
xr_server->connect("body_tracker_removed", callable_mp(this, &XRBodyModifier3D::_tracker_changed).bind(Ref<XRBodyTracker>()));
}
_get_joint_data();
set_process_internal(true);
} break;
case NOTIFICATION_EXIT_TREE: {
XRServer *xr_server = XRServer::get_singleton();
if (xr_server) {
xr_server->disconnect("body_tracker_added", callable_mp(this, &XRBodyModifier3D::_tracker_changed));
xr_server->disconnect("body_tracker_updated", callable_mp(this, &XRBodyModifier3D::_tracker_changed));
xr_server->disconnect("body_tracker_removed", callable_mp(this, &XRBodyModifier3D::_tracker_changed).bind(Ref<XRBodyTracker>()));
}
set_process_internal(false);
for (int i = 0; i < XRBodyTracker::JOINT_MAX; i++) {
joints[i].bone = -1;
joints[i].parent_joint = -1;
}
} break;
case NOTIFICATION_INTERNAL_PROCESS: {
_update_skeleton();
} break;
default: {
} break;
}
}