OpenGL：使用带std :: vector的VBO

问题描述：

我试图加载一个对象，并使用VBO和glDrawArrays（）来渲染它。问题是一个简单的浮动指针如 float f [] = {...} 在我的情况下不工作，因为我传递的值的限制，这个指针可以商店。所以我的解决方案是使用一个向量。它不工作...

I'm trying to load an object and use VBO and glDrawArrays() to render it. The problem is that a simple float pointer like float f[]={...} does not work in my case, because I passed the limit of values that this pointer can store. So my solution was to use a vector. And it's not working...

这是我的代码：

unsigned int vbo;
vector<float*> vert;

...
vert.push_back(new float(i*size));
vert.push_back(new float(height*h));
vert.push_back(new float(j*size));
...

glGenBuffers(1, &vbo);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof(vert), &vert, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);

并呈现：

glBindBuffer(GL_ARRAY_BUFFER, vbo);
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(3, GL_FLOAT, 0, 0);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 3);
glDisableClientState(GL_VERTEX_ARRAY);
glBindBuffer(GL_ARRAY_BUFFER, 0);

我在 glBufferData c>其中第三个参数是 const GLvoid * data 。

答

& vert 你想做：

unsigned int vbo;
vector<float> vert;

...
vert.push_back(i*size);
vert.push_back(height*h);
vert.push_back(j*size);
...

glGenBuffers(1, &vbo);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glBufferData(GL_ARRAY_BUFFER, vert.size() * sizeof(float), vert.data(), GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);

阅读文档。此外，我建议你拿起一本好的C ++书，这可能是一个很好的方法，你可以避免犯这样的错误。

It is always good to read the documentation. Also, I would suggest you pick up a good C++ book, which probably would be a good way for you to avoid doing mistakes like these.

OpenGL：使用带std :: vector的VBO

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