标题： 检查AutoCAD程序中阳光淡化和阴影工具的效率 显示英文标题

标题： Examining the Efficiency of Sun Lightening and Shadow Tools in AutoCAD Program

摘要： AutoCAD 是一款在工程设计中具有高精度规格的最著名计算机辅助绘图程序之一。 它非常专业，并包含许多工程部门所需的各种工具。 一个有用的工具是照明工具，因为它能以很大程度上模拟现实的渲染效果，这对建筑师和城市设计师都有好处。 该工具包括根据一年中的日期模拟阳光、一天中的时间以及地球上的物体位置。 我们在测试区域的范围内测试了该程序中的日照状态工具，以查看其准确性，结果发现存在 45% 的误差差异。 AutoCAD 渲染中的太阳阴影比实际长 145%。 阴影的方向也存在另一个误差。 对于任何需要从 AutoCAD 程序计算阴影长度和方向的设计者来说，必须注意这些误差。 显示英文摘要

摘要： The AutoCAD is one of the most famous Computer Aided Drawing programs with high and accurate specifications in the engineering design. It is highly qualified and contains many of the tools it needs in many engineering departments. A useful tool is the lighting tool because it gives a simulated rendering of reality to a great degree that benefits the architect as well as urban designers. This tool includes simulating sunlight by date during the year, timing of day, and position of the body on the Earth. We tested the sunlight status tools in this program in the limit of our test region to see how accurate it was and it turned out to have a 45% error difference. The sun shadow in AutoCAD rendering is longer than the real by 145%. There is another error in the direction of shadow also. It is essential to note these errors for any designer need to calculate the shadow length and direction from the AutoCAD program.