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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "customgeometry.h"
#include <qmath.h>
#include <QRandomGenerator>
#include <QColor>
//struct Vertex {
// QVector3D position;
//// qint32 joints[4];
//// float weights[4];
// float pad;
//};
//static const int s_vertexSize = sizeof(Vertex);
//Q_STATIC_ASSERT(s_vertexSize == 16);
CustomGeometry::CustomGeometry(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::ColorSemantic, 3 * sizeof(float),
QQuick3DGeometry::Attribute::ComponentType::F32Type);
// 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> CustomGeometry::positions() const
{
return m_positions;
}
QList<qint32> CustomGeometry::joints() const
{
return m_joints;
}
QList<float> CustomGeometry::weights() const
{
return m_weights;
}
QList<quint32> CustomGeometry::indexes() const
{
return m_indexes;
}
void CustomGeometry::setPositions(const QList<QVector3D> &positions)
{
if (positions == m_positions)
return;
m_positions = positions;
emit positionsChanged();
m_vertexDirty = true;
}
void CustomGeometry::setJoints(const QList<qint32> &joints)
{
if (joints == m_joints)
return;
m_joints = joints;
emit jointsChanged();
m_vertexDirty = true;
}
void CustomGeometry::setWeights(const QList<float> &weights)
{
if (weights == m_weights)
return;
m_weights = weights;
emit weightsChanged();
m_vertexDirty = true;
}
void CustomGeometry::setIndexes(const QList<quint32> &indexes)
{
if (indexes == m_indexes)
return;
m_indexes = indexes;
emit indexesChanged();
m_indexDirty = true;
}
#if 0
QVector3D cubeVertices[8] =
{
QVector3D(-1, -1, -1),
QVector3D(1, -1, -1),
QVector3D(1, 1, -1),
QVector3D(-1, 1, -1),
QVector3D(-1, -1, 1),
QVector3D(1, -1, 1),
QVector3D(1, 1, 1),
QVector3D(-1, 1, 1)
};
int cubeIndices[6 * 6] =
{
0, 1, 3, 3, 1, 2,
1, 5, 2, 2, 5, 6,
5, 4, 6, 6, 4, 7,
4, 0, 7, 7, 0, 3,
3, 2, 7, 7, 2, 6,
4, 5, 0, 0, 5, 1
};
constexpr int vertsPerCube = 8;
constexpr int trianglesPerCube = 6*2;
#else
QVector3D cubeVertices[6] =
{
QVector3D(0, -1, 0),
QVector3D(-1, 0, -1),
QVector3D(-1, 0, 1),
QVector3D(1, 0, 1),
QVector3D(1, 0, -1),
QVector3D(0, 1, 0)
};
constexpr int vertsPerCube = 6;
constexpr int trianglesPerCube = 8;
int cubeIndices[trianglesPerCube*3] =
{
0,4,1, 0,3,4, 0,2,3, 0,1,2,
5,1,4, 5,4,3, 5,3,2, 5,2,1
};
#endif
constexpr int numCubes = 1;
constexpr int floatsPerVert = 8;
constexpr qsizetype vertexBufferSizeInBytes = numCubes * vertsPerCube * floatsPerVert * sizeof(float);
constexpr qsizetype indexBufferSizeInBytes = numCubes * sizeof(cubeIndices);
QSSGRenderGraphObject *CustomGeometry::updateSpatialNode(QSSGRenderGraphObject *node)
{
#if 1
if (m_vertexDirty) {
QByteArray iBuffer;
iBuffer.resize(indexBufferSizeInBytes);
QByteArray vBuffer;
vBuffer.resize(vertexBufferSizeInBytes);
vBuffer.fill(0);
int *iData = reinterpret_cast<int*>(iBuffer.data());
float *vData = reinterpret_cast<float*>(vBuffer.data());
QRandomGenerator *rgen = QRandomGenerator::global();
for (int c = 0; c < numCubes; ++c) {
auto rand = [rgen]() {return rgen->bounded(10000)/50.0 - 100; };
QColor cubeColor(rgen->bounded(255), rgen->bounded(255), rgen->bounded(255));
QVector3D offs = numCubes == 1 ? QVector3D{} : QVector3D(2*rand(), rand(), 2*rand());
float scale = numCubes == 1 ? 1.0 : rgen->bounded(100)/100.0;
scale = scale * 10;
//scale = scale/3.0;
//.............
for (int i = 0; i < vertsPerCube; ++i) {
int idx = i * floatsPerVert + c * vertsPerCube * floatsPerVert;
QVector3D vertex = cubeVertices[i] * scale * -1 + offs; // our polygons' faces are oriented wrong
//qDebug() << "cube" << c << "vert" << i << vertex;
vData[idx] = vertex.x();
vData[idx+1] = vertex.y();
vData[idx+2] = vertex.z();
vData[idx+3] = cubeColor.redF();
vData[idx+4] = cubeColor.greenF();
vData[idx+5] = cubeColor.blueF();
vData[idx+6] = 1.0;
}
//qDebug() << "iData" << indexBufferSizeInBytes << iBuffer.size();
constexpr int idxPerCube = trianglesPerCube * 3;
for (int i = 0; i < trianglesPerCube*3; ++i) {
//qDebug() << "trying:" << QString::number(i) << i + c*idxpercube << "of" << indexBufferSizeInBytes/sizeof(float);
iData[i + c * idxPerCube] = cubeIndices[i] + c * vertsPerCube;
}
}
setStride(floatsPerVert * sizeof(float));
setVertexData(vBuffer);
setPrimitiveType(QQuick3DGeometry::PrimitiveType::Triangles);
setIndexData(iBuffer);
m_vertexDirty = false;
}
#else
if (m_vertexDirty) {
m_vertexDirty = false;
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];
}
setStride(s_vertexSize);
setVertexData(m_vertexBuffer);
setPrimitiveType(QQuick3DGeometry::PrimitiveType::Triangles);
}
if (m_indexDirty) {
m_indexDirty = false;
m_indexBuffer = QByteArray(reinterpret_cast<char *>(m_indexes.data()), m_indexes.size() * sizeof(quint32));
setIndexData(m_indexBuffer);
}
#endif
node = QQuick3DGeometry::updateSpatialNode(node);
return node;
}