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目前的解决办法是，讲rasterizer.cpp中set_pixel函数的判断像素是否在画布上的条件从
if (point.x() < 0 || point.x() >= width || point.y() < 0 || point.y() >= height) return;
改成
if (point.x() <= 0 || point.x() >= width || point.y() <= 0 || point.y() >= height) return;因为当计算到 (664, 0) 这个像素时，index的生成公式算出的序号会越界，即 490664
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就像楼上说的，出错在 rasterizer.cpp 的 set_pixel
如果 x 和 y 同时为 0，ind 此时等于 height * width，但是数组范围为 [0, height * width – 1]，因此出现了越界
解决方法是不允许 x 和 y 同时为 0，也就是把小于号改成小于等于号
void rst::rasterizer::set_pixel(const Eigen::Vector3f& point, const Eigen::Vector3f& color) { //old index: auto ind = point.y() + point.x() * width; if (point.x() <= 0 || point.x() >= width || point.y() <= 0 || point.y() >= height) return; // if point.x() == 0 and point.y() == 0 // then get ind == height * width // but size of frame_buf == height * width // so available index of frame_buf is [0, height * width - 1] // so don't allow point.x() == 0 and point.y() == 0 auto ind = (height-point.y())*width + point.x(); frame_buf[ind] = color; }
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