Uploaded as a request. Looking for parametric curve definition to produce this kind of imagery, as it is now an approximation. The idea is the following: in technical drawings for example, giving an object a particular tone is achieved by hatching. Hatching may consist of parallel lines, drawn with the same line weights. But how could someone make an angled hatch in a polar way -meaning anything but concentric circles-? Still keeping a consistent tone at the end. Any ideas? Archimedean spirals are a close match if the width of the stroke is 0, but not this case.
未知的螺旋
2014、approximation、curve、derive、even、function、geometry、hatching、Lazur、line、math、parallel、parameters、parametric、path、plotter、request complete、spiral、stroke、tone、URH
2014、近似、曲線、派生、甚至、功能、幾何、孵化、天藍、線、數學、平行、參數、參數、路徑、繪圖儀、請求完成、螺旋、行程、音、URH
資料來源：openclipart ( https://openclipart.org/ )