小编Bre*_*rin的帖子

在尝试将数组从C++传递给C#时,我看到了一个非常奇怪的问题.我正在使用Marshal.Copy(具体来说:https://msdn.microsoft.com/en-us/library/a53bd6cz(v = vs1010 ).aspx ).

问题:从C++到C#的float数组NaN在结果数组中产生了一些. (注意:我在Unity游戏引擎的上下文中工作)

码

示例C++代码:

extern "C" bool UNITY_INTERFACE_EXPORT UNITY_INTERFACE_API getSomeFloats(float** points, int* count) {
        std::vector<float> results;
        std::vector<SOME_TYPE> key_points = <SOME_POINTS>

        for (auto iter = key_points.begin(); iter < key_points.end(); iter++) {
            results.push_back(static_cast<float>(iter->pt.x));
            results.push_back(static_cast<float>(iter->pt.y));
        }

        *points = results.data();
        *count = results.size();

        //<Print results to csv here>

        return true;
}

示例C#代码:

[DllImport("NativePlugin")]
private static extern bool getSomeFloats (ref IntPtr ptrResultItems, ref int resultItemsLength);

private static float[] getFloatArrayFromNative() {
        IntPtr ptrResultItems = IntPtr.Zero;
        int …