{"type":"rich","version":"1.0","title":"三点透视+球面透视（连续点）+正交顶视图+透视线","html":"<iframe src=\"https://www.desmos.com/calculator/mprziupakg?embed\" width=\"500px\" height=\"500px\" style=\"border: 1px solid #ccc\" frameborder=0></iframe>","width":500,"height":500}