[英]Draw points in OpenGL with QVector3D
I have a list of QVector3D
, which is a list of points, I want to draw a list of points with glDrawArrays
. 我有一个
QVector3D
列表,这是一个点列表,我想用glDrawArrays
绘制一个点列表。
initializeGLFunctions();
glGenBuffers(2, vbo);
//the vertices
QVector3D *vertices = &data[0];
glBindBuffer(GL_ARRAY_BUFFER, vbo[0]);
glBufferData(GL_ARRAY_BUFFER, data.size() * sizeof(QVector3D), vertices, GL_STATIC_DRAW);
glDrawArrays(GL_POINTS,??);
or what other method I can use to deal with this? 或我可以使用什么其他方法来处理呢?
glBufferData(GL_ARRAY_BUFFER, data.size() * sizeof(QVector3D), vertices, GL_STATIC_DRAW);
glBufferData(GL_ARRAY_BUFFER,data.size()* sizeof(QVector3D),顶点,GL_STATIC_DRAW);
This is correct, but I would suggest to use more intelligent containers like QVector outside an then constData as follows: 这是正确的,但是我建议在然后constData之外使用更智能的容器,例如QVector,如下所示:
glBufferData(GL_ARRAY_BUFFER, data.size() * sizeof(QVector3D), myVector.constData(), GL_STATIC_DRAW);
Here is another official example how to use glBufferData
in the context of QVector3D
: 这是另一个官方示例,该示例如何在
glBufferData
的上下文中使用QVector3D
:
geometryengine.cpp Example File geometryengine.cpp示例文件
Here can you find another third-party example following the official example: 在官方示例之后,您可以在这里找到另一个第三方示例:
Then, you could write: 然后,您可以编写:
glDrawArrays(GL_POINTS, 0, data.size());
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