BinaryReader 读取值列表 C#

Question

I am trying to understand how the BinaryReader works in C#. But how does it works for lists I would like to ask an explanation.

I am following this documentation: http://paulbourke.net/dataformats/ply/

The documentation says that the list of mesh faces are stored in the property:

property list int int vertex_index 

I believe it means that there are list of faces, where the first integer is the number of vertices per face, and other properties indicates the vertex indices. How to retrieve this list of list is my question.

Here I have the function:

private static DataBody ReadDataBodyBinary(DataHeader header, BinaryReader reader) {

            for (int i = 0; i < header.faceCount; i++) {
                //how can I retrieve the face list here?
            }

}

I tried to write inside loop:

int faceVertex = reader.ReadInt32();

But this gives me sometimes positives and sometimes negative values.

By reading the

Answer 1

Incase someone will try to search for binary ply reader for Poisson pointcloud reconstruction using C# use this: https://github.com/petrasvestartas/PlyReader