Beginner’s guide to CAD drawing software: coordinate systems and coordinate labeling

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The HaoChen CAD drawing software provides an absolute coordinate system for the drawing space, known as the world coordinate system. This coordinate system exists in any graphic and cannot be changed. Relative to the world coordinate system, users can create an infinite number of CAD coordinate systems as needed; these coordinate systems are known as user coordinate systems. Next, I will provide you with a detailed introduction to the coordinate system and methods for marking coordinates in the Haochen CAD drawing software! First, let’s review the concept of coordinate systems in mathematics. 1. Cartesian coordinate system: The Cartesian coordinate system, also known as the rectangular coordinate system, consists of an origin and two coordinate axes that pass through the origin and are perpendicular to each other. Among them, the horizontal coordinate axis is the X-axis, and the vertical coordinate axis is the Y-axis. For example, the Cartesian coordinates of a certain point are (3,4). 2. Polar coordinate system: A polar coordinate system consists of a pole and a polar axis, with the polar axis pointing horizontally to the right. Any point P in a plane can be defined by the length L (>0) of the line segment connecting that point to the pole, and the angle a that this line segment makes with the polar axis; in other words, by a pair of coordinate values (L