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28
29#ifndef GEOMETRYTESTHELPER_H
30#define GEOMETRYTESTHELPER_H
31
32#include <Qt3DRender/qattribute.h>
33#include <Qt3DRender/qbuffer.h>
34#include <Qt3DRender/qbufferdatagenerator.h>
35#include <Qt3DRender/qgeometry.h>
36
37inline void generateGeometry(Qt3DRender::QGeometry &geometry)
38{
39 // Get all attributes
40 const QVector<Qt3DRender::QAttribute *> attributes = geometry.attributes();
41
42 // Get all unique data generators from the buffers referenced by the attributes
43 QHash<Qt3DRender::QBufferDataGeneratorPtr, Qt3DRender::QBuffer *> dataGenerators;
44 for (const auto attribute : attributes) {
45 QT_WARNING_PUSH
46 QT_WARNING_DISABLE_DEPRECATED
47 const auto dataGenerator = attribute->buffer()->dataGenerator();
48 if (!dataGenerators.contains(akey: dataGenerator))
49 dataGenerators.insert(akey: dataGenerator, avalue: attribute->buffer());
50 QT_WARNING_POP
51 }
52
53 // Generate data for each buffer
54 const auto end = dataGenerators.end();
55 for (auto it = dataGenerators.begin(); it != end; ++it) {
56 Qt3DRender::QBufferDataGeneratorPtr dataGenerator = it.key();
57 const QByteArray data = (*dataGenerator)();
58
59 Qt3DRender::QBuffer *buffer = it.value();
60 buffer->setData(data);
61 }
62}
63
64template<typename IndexType>
65IndexType extractIndexData(Qt3DRender::QAttribute *attribute, int index)
66{
67 // Get the raw data
68 const IndexType *typedData = reinterpret_cast<const IndexType *>(attribute->buffer()->data().constData());
69
70 // Offset into the data taking stride and offset into account
71 const IndexType indexValue = *(typedData + index);
72 return indexValue;
73}
74
75template<typename VertexType, typename IndexType>
76VertexType extractVertexData(Qt3DRender::QAttribute *attribute, IndexType index)
77{
78 // Get the raw data
79 const char *rawData = attribute->buffer()->data().constData();
80
81 // Offset into the data taking stride and offset into account
82 const char *vertexData = rawData + (index * attribute->byteStride() + attribute->byteOffset());
83
84 // Construct vertex from the typed data
85 VertexType vertex;
86 const Qt3DRender::QAttribute::VertexBaseType type = attribute->vertexBaseType();
87 switch (type)
88 {
89 case Qt3DRender::QAttribute::Float: {
90 const float *typedVertexData = reinterpret_cast<const float *>(vertexData);
91 const int components = attribute->vertexSize();
92 for (int i = 0; i < components; ++i)
93 vertex[i] = typedVertexData[i];
94 break;
95
96 // TODO: Handle other types as needed
97 }
98
99 default:
100 qWarning() << "Unhandled type";
101 Q_UNREACHABLE();
102 break;
103 }
104
105 return vertex;
106}
107
108#endif // GEOMETRYTESTHELPER_H
109

source code of qt3d/tests/auto/extras/common/geometrytesthelper.h