我的目标是创建一个numpy
数组并将其字节数据转换为QBuffer
. 我想知道如何正确设置DataSize
,ByteStride
和Count
. 请参阅下面的代码:
self.mesh = Qt3DRender.QGeometryRenderer()
self.mesh.setPrimitiveType(Qt3DRender.QGeometryRenderer.Points)
self.geometry = Qt3DRender.QGeometry(self.mesh)
vertex_data_buffer = Qt3DRender.QBuffer(Qt3DRender.QBuffer.VertexBuffer, self.geometry)
data = np.random.rand(1000, 3)
vertex_data_buffer.setData(QByteArray(data.tobytes()))
self.position_attribute = Qt3DRender.QAttribute()
self.position_attribute.setAttributeType(
Qt3DRender.QAttribute.VertexAttribute)
self.position_attribute.setBuffer(vertex_data_buffer)
self.position_attribute.setDataType(Qt3DRender.QAttribute.Float)
self.position_attribute.setDataSize(3) # ??
self.position_attribute.setByteOffset(0)
self.position_attribute.setByteStride(6) # ??
self.position_attribute.setCount(1000) # ??
self.position_attribute.setName(
Qt3DRender.QAttribute.defaultPositionAttributeName())
self.geometry.addAttribute(self.position_attribute)