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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "skingeometry.h"
#include <qmath.h>
struct Vertex {
QVector3D position;
qint32 joints[4];
float weights[4];
float pad;
};
static const int s_vertexSize = sizeof(Vertex);
Q_STATIC_ASSERT(s_vertexSize == 48);
SkinGeometry::SkinGeometry(QQuick3DObject *parent)
: QQuick3DGeometry(parent)
{
addAttribute(QQuick3DGeometry::Attribute::PositionSemantic, 0,
QQuick3DGeometry::Attribute::ComponentType::F32Type);
addAttribute(QQuick3DGeometry::Attribute::IndexSemantic, 0,
QQuick3DGeometry::Attribute::ComponentType::U32Type);
addAttribute(QQuick3DGeometry::Attribute::JointSemantic, offsetof(Vertex, joints[0]),
QQuick3DGeometry::Attribute::ComponentType::I32Type);
addAttribute(QQuick3DGeometry::Attribute::WeightSemantic, offsetof(Vertex, weights[0]),
QQuick3DGeometry::Attribute::ComponentType::F32Type);
}
QList<QVector3D> SkinGeometry::positions() const
{
return m_positions;
}
QList<qint32> SkinGeometry::joints() const
{
return m_joints;
}
QList<float> SkinGeometry::weights() const
{
return m_weights;
}
QList<quint32> SkinGeometry::indexes() const
{
return m_indexes;
}
void SkinGeometry::setPositions(const QList<QVector3D> &positions)
{
if (positions == m_positions)
return;
m_positions = positions;
emit positionsChanged();
m_vertexDirty = true;
}
void SkinGeometry::setJoints(const QList<qint32> &joints)
{
if (joints == m_joints)
return;
m_joints = joints;
emit jointsChanged();
m_vertexDirty = true;
}
void SkinGeometry::setWeights(const QList<float> &weights)
{
if (weights == m_weights)
return;
m_weights = weights;
emit weightsChanged();
m_vertexDirty = true;
}
void SkinGeometry::setIndexes(const QList<quint32> &indexes)
{
if (indexes == m_indexes)
return;
m_indexes = indexes;
emit indexesChanged();
m_indexDirty = true;
}
QSSGRenderGraphObject *SkinGeometry::updateSpatialNode(QSSGRenderGraphObject *node)
{
if (m_vertexDirty) {
m_vertexDirty = false;
constexpr float maxFloat = std::numeric_limits<float>::max();
auto boundsMin = QVector3D(maxFloat, maxFloat, maxFloat);
auto boundsMax = QVector3D(-maxFloat, -maxFloat, -maxFloat);
const int numVertexes = m_positions.size();
m_vertexBuffer.resize(numVertexes * s_vertexSize);
Vertex *vert = reinterpret_cast<Vertex *>(m_vertexBuffer.data());
for (int i = 0; i < numVertexes; ++i) {
Vertex &v = vert[i];
v.position = m_positions[i];
if (m_joints.size() >= 4 * (i + 1))
memcpy(v.joints, m_joints.constData() + 4 * i, 4 * sizeof(qint32));
else
v.joints[0] = v.joints[1] = v.joints[2] = v.joints[3] = 0;
if (m_weights.size() >= 4 * (i + 1))
memcpy(v.weights, m_weights.constData() + 4 * i, 4 * sizeof(float));
else
v.weights[0] = v.weights[1] = v.weights[2] = v.weights[3] = 0.0f;
boundsMin.setX(std::min(boundsMin.x(), v.position.x()));
boundsMin.setY(std::min(boundsMin.y(), v.position.y()));
boundsMin.setZ(std::min(boundsMin.z(), v.position.z()));
boundsMax.setX(std::max(boundsMax.x(), v.position.x()));
boundsMax.setY(std::max(boundsMax.y(), v.position.y()));
boundsMax.setZ(std::max(boundsMax.z(), v.position.z()));
}
setStride(s_vertexSize);
setVertexData(m_vertexBuffer);
setPrimitiveType(QQuick3DGeometry::PrimitiveType::Triangles);
setBounds(boundsMin, boundsMax);
}
if (m_indexDirty) {
m_indexDirty = false;
m_indexBuffer = QByteArray(reinterpret_cast<char *>(m_indexes.data()), m_indexes.size() * sizeof(quint32));
setIndexData(m_indexBuffer);
}
node = QQuick3DGeometry::updateSpatialNode(node);
return node;
}
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