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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <QtTest>
#include <QtQuick3DUtils/private/qssgmeshbvh_p.h>
#include <QtQuick3DUtils/private/qssgmeshbvhbuilder_p.h>
#include <QtQuick3DRuntimeRender/private/qssgrendergeometry_p.h>
#include <QtQuick3DRuntimeRender/private/qssgrenderbuffermanager_p.h>
class Bvh : public QObject
{
Q_OBJECT
public:
Bvh() = default;
~Bvh() = default;
struct Attributes
{
QSSGMesh::RuntimeMeshData::Attribute::Semantic semantic;
int offset;
QSSGMesh::Mesh::ComponentType componentType;
};
struct Bounds
{
QVector3D min {};
QVector3D max {};
};
private Q_SLOTS:
void bench_bvh_small();
void bench_bvh_medium();
void bench_bvh_large();
private:
void prepRenderGeometry(qsizetype width, qsizetype height, QSSGRenderGeometry &renderGeometry);
};
void Bvh::bench_bvh_small()
{
const qsizetype width = 128;
const qsizetype height = 128;
QSSGRenderGeometry renderGeometry;
prepRenderGeometry(width, height, renderGeometry);
QVarLengthArray<std::unique_ptr<QSSGMeshBVH>, 4096> bvhStorage;
QBENCHMARK {
bvhStorage.push_back(QSSGBufferManager::loadMeshBVH(&renderGeometry));
}
for (const auto &bvh : bvhStorage)
QVERIFY(bvh != nullptr && bvh->nodes().size() > 0);
}
void Bvh::bench_bvh_medium()
{
const qsizetype width = 2048;
const qsizetype height = 2048;
QSSGRenderGeometry renderGeometry;
prepRenderGeometry(width, height, renderGeometry);
QVarLengthArray<std::unique_ptr<QSSGMeshBVH>, 2048> bvhStorage;
QBENCHMARK {
bvhStorage.push_back(QSSGBufferManager::loadMeshBVH(&renderGeometry));
}
for (const auto &bvh : bvhStorage)
QVERIFY(bvh != nullptr && bvh->nodes().size() > 0);
}
void Bvh::bench_bvh_large()
{
// #define ENABLE_LARGE_TEST
#ifndef ENABLE_LARGE_TEST
QSKIP("The size for the large test is resource intensive and can be platform specific");
#endif // ENABLE_LARGE_TEST
const qsizetype width = 8192;
const qsizetype height = 8192;
QSSGRenderGeometry renderGeometry;
prepRenderGeometry(width, height, renderGeometry);
QVarLengthArray<std::unique_ptr<QSSGMeshBVH>, 1024> bvhStorage;
QBENCHMARK {
bvhStorage.push_back(QSSGBufferManager::loadMeshBVH(&renderGeometry));
}
for (const auto &bvh : bvhStorage)
QVERIFY(bvh != nullptr && bvh->nodes().size() > 0);
}
void Bvh::prepRenderGeometry(qsizetype width, qsizetype height, QSSGRenderGeometry &renderGeometry)
{
const qsizetype entries = width * height;
Bounds bounds { {}, { float(width), float(height), 0 }};
size_t stride = width * sizeof(QVector3D);
QByteArray vertexBuffer;
vertexBuffer.resize(stride * height);
vertexBuffer.fill(0);
QSSGDataRef<QVector3D> dataRef{ reinterpret_cast<QVector3D *>(vertexBuffer.data()), entries };
for (auto h = 0; h != height; ++h) {
for (auto w = 0; w != width; ++w)
dataRef[(h * w) + w] = QVector3D{ float(w), float(h), 0.0f };
}
auto primitiveType = QSSGRenderDrawMode::Triangles;
renderGeometry.clearVertexAndIndex();
renderGeometry.setBounds(bounds.min, bounds.max);
renderGeometry.setStride(stride);
renderGeometry.setVertexData(vertexBuffer);
renderGeometry.setPrimitiveType(primitiveType);
Attributes attributes[] { { QSSGMesh::RuntimeMeshData::Attribute::PositionSemantic, 0, QSSGRenderComponentType::Float32 } };
for (const auto &attr : attributes)
renderGeometry.addAttribute(attr.semantic, attr.offset, attr.componentType);
{
quint32 offset = 0;
quint32 count = 0;
renderGeometry.addSubset(offset, count, bounds.min, bounds.max);
}
}
QTEST_APPLESS_MAIN(Bvh)
#include "tst_bvh.moc"
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