作业3texture shader报错

[Reloof]

用下面代码获得纹理的颜色

if (payload.texture)
{
    // TODO: Get the texture value at the texture coordinates of the current fragment
    return_color = payload.texture->getColor(payload.tex_coords.x(), payload.tex_coords.y());
}

但opencv会报错：
OpenCV(4.6.0) Error: Assertion failed ((unsigned)(i1 * DataType<_Tp>::channels) < (unsigned)(size.p[1] * channels())) in cv::Mat::at, file C:\opencv\build\include\opencv2\core\mat.inl.hpp, line 899
OpenCV: terminate handler is called! The last OpenCV error is:
OpenCV(4.6.0) Error: Assertion failed ((unsigned)(i1 * DataType<_Tp>::channels) < (unsigned)(size.p[1] * channels())) in cv::Mat::at, file C:\opencv\build\include\opencv2\core\mat.inl.hpp, line 899
感觉像是下标超界

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