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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "qquick3dskin_p.h"
#include "qquick3dobject_p.h"
#include "qquick3dscenemanager_p.h"
#include <QtQuick3DRuntimeRender/private/qssgrendergraphobject_p.h>
#include <QtQuick3DRuntimeRender/private/qssgrenderskin_p.h>
#include <QtQuick3DUtils/private/qssgutils_p.h>
QT_BEGIN_NAMESPACE
/*!
\qmltype Skin
\inherits Object3D
\inqmlmodule QtQuick3D
\brief Defines a skinning animation.
A skin defines how a model can be animated using \l {Vertex Skinning}
{skeletal animation}. It contains a list of \l {Node}s and an optional list
of the Inverse Bind Pose Matrices.
Each \l {Node}'s transform becomes a transform of the bone with the
corresponding index in the list.
\qml
Skin {
id: skin0
joints: [
node0,
node1,
node2
]
inverseBindPoses: [
Qt.matrix4x4(...),
Qt.matrix4x4(...),
Qt.matrix4x4(...)
]
}
\endqml
\note \l {Skeleton} and \l {Joint} will be deprecated.
*/
QQuick3DSkin::QQuick3DSkin(QQuick3DObject *parent)
: QQuick3DObject(*(new QQuick3DObjectPrivate(QQuick3DObjectPrivate::Type::Skin)), parent)
{
}
QQuick3DSkin::~QQuick3DSkin()
{
for (const auto &conn : m_jointsConnections) {
disconnect(conn.first);
disconnect(conn.second);
}
}
/*!
\qmlproperty List<QtQuick3D::Node> Skin::joints
This property contains a list of nodes used for a hierarchy of joints.
The order in the list becomes the index of the joint, which is used in the
\c SkinSemantic \l {QQuick3DGeometry::addAttribute}{custom geometry attribute}.
\note A value 'undefined' will be ignored and if a node which doesn't exist is
described, the result is unpredictable.
\sa {QQuick3DGeometry::addAttribute}, {Qt Quick 3D - Simple Skinning Example}
*/
QQmlListProperty<QQuick3DNode> QQuick3DSkin::joints()
{
return QQmlListProperty<QQuick3DNode>(this,
nullptr,
QQuick3DSkin::qmlAppendJoint,
QQuick3DSkin::qmlJointsCount,
QQuick3DSkin::qmlJointAt,
QQuick3DSkin::qmlClearJoints);
}
#define POS4BONETRANS(x) (sizeof(float) * 16 * (x) * 2)
#define POS4BONENORM(x) (sizeof(float) * 16 * ((x) * 2 + 1))
void QQuick3DSkin::qmlAppendJoint(QQmlListProperty<QQuick3DNode> *list, QQuick3DNode *joint)
{
if (joint == nullptr)
return;
QQuick3DSkin *self = static_cast<QQuick3DSkin *>(list->object);
if (!self->m_jointsConnections.contains(joint)) {
self->m_jointsConnections[joint] =
std::make_pair(
connect(
joint, &QQuick3DNode::sceneTransformChanged,
self, [self, joint]() {
self->m_dirtyJoints.insert(joint);
self->update();
}),
connect(
joint, &QQuick3DNode::destroyed,
self, [self, joint]() {
self->m_dirtyJoints.remove(joint);
self->m_removedJoints.insert(joint);
self->update();
})
);
}
self->m_joints.push_back(joint);
self->m_dirtyJoints.insert(joint);
self->update();
}
QQuick3DNode *QQuick3DSkin::qmlJointAt(QQmlListProperty<QQuick3DNode> *list, qsizetype index)
{
QQuick3DSkin *self = static_cast<QQuick3DSkin *>(list->object);
return self->m_joints.at(index);
}
qsizetype QQuick3DSkin::qmlJointsCount(QQmlListProperty<QQuick3DNode> *list)
{
QQuick3DSkin *self = static_cast<QQuick3DSkin *>(list->object);
return self->m_joints.size();
}
void QQuick3DSkin::qmlClearJoints(QQmlListProperty<QQuick3DNode> *list)
{
QQuick3DSkin *self = static_cast<QQuick3DSkin *>(list->object);
for (const auto &conn : self->m_jointsConnections) {
disconnect(conn.first);
disconnect(conn.second);
}
self->m_jointsConnections.clear();
self->m_joints.clear();
self->m_boneData.clear();
self->m_dirtyJoints.clear();
self->m_removedJoints.clear();
self->update();
}
/*!
\qmlproperty List<matrix4x4> Skin::inverseBindPoses
This property contains a list of Inverse Bind Pose matrixes used for the
skinning animation. Each inverseBindPose matrix means the inverse of the
global transform of the corresponding node in \l {Skin::joints},
used initially.
\note This property is an optional property. That is, if some or all of the
matrices are not set, identity values will be used.
*/
QList<QMatrix4x4> QQuick3DSkin::inverseBindPoses() const
{
return m_inverseBindPoses;
}
void QQuick3DSkin::setInverseBindPoses(const QList<QMatrix4x4> &poses)
{
if (m_inverseBindPoses == poses)
return;
m_updatedByNewInverseBindPoses = qMax(poses.size(), m_inverseBindPoses.size());
m_inverseBindPoses = poses;
emit inverseBindPosesChanged();
update();
}
QSSGRenderGraphObject *QQuick3DSkin::updateSpatialNode(QSSGRenderGraphObject *node)
{
if (!node) {
markAllDirty();
node = new QSSGRenderSkin();
}
QQuick3DObject::updateSpatialNode(node);
auto skinNode = static_cast<QSSGRenderSkin *>(node);
if (!m_removedJoints.empty()) {
for (int i = m_joints.size() - 1; i >= 0; --i) {
const auto &joint = m_joints.at(i);
if (m_removedJoints.contains(joint)) {
m_joints.removeAt(i);
m_boneData.remove(POS4BONETRANS(i),
sizeof(float) * 16 * 2);
}
}
m_removedJoints.clear();
}
if (skinNode->boneCount != quint32(m_joints.size())) {
skinNode->boneCount = quint32(m_joints.size());
const int boneTexWidth = qCeil(qSqrt(skinNode->boneCount * 4 * 2));
const int textureSizeInBytes = boneTexWidth * boneTexWidth * 16; //NB: Assumes RGBA32F set above (16 bytes per color)
m_boneData.resize(textureSizeInBytes);
skinNode->setSize(QSize(boneTexWidth, boneTexWidth));
}
if (m_updatedByNewInverseBindPoses > 0 || !m_dirtyJoints.empty()) {
for (int i = 0; i < m_joints.size(); ++i) {
const auto &joint = m_joints.at(i);
if (i < m_updatedByNewInverseBindPoses || m_dirtyJoints.contains(joint)) {
QMatrix4x4 jointGlobal = joint->sceneTransform();
if (m_inverseBindPoses.size() > i)
jointGlobal *= m_inverseBindPoses.at(i);
memcpy(m_boneData.data() + POS4BONETRANS(i),
reinterpret_cast<const void *>(jointGlobal.constData()),
sizeof(float) * 16);
memcpy(m_boneData.data() + POS4BONENORM(i),
reinterpret_cast<const void *>(QMatrix4x4(jointGlobal.normalMatrix()).constData()),
sizeof(float) * 11);
}
}
m_dirtyJoints.clear();
m_updatedByNewInverseBindPoses = 0;
}
skinNode->setTextureData(m_boneData);
return node;
}
QT_END_NAMESPACE
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