To determine the coordinates of a control point, you can use the relative coordinate function known as "polar." The polar function is defined as (polar p0 angle distance), where p0 represents the reference point's coordinates, angle is the angle between the line connecting the point to p0 and the horizontal axis, and distance is the length from p0 to the target point. For instance, if the angle between the line connecting p1 and p0 and the horizontal axis is 90 degrees, and the distance is 0.5 units, the following expression would return the coordinates of p1: (polar p0 90 0.5). For points like p28, p27, and o43, you can directly use the Get-CPP-LL function to retrieve their coordinates. When working with standard parts in a drawing, it's common to insert them as blocks into the drawing file. Therefore, before drawing, you need to create a block first. The following code creates a tile named mBlock: (setq blockName (Get-Blockname "0Luoding-KaiCaoPantou")) (setq mBlock (apa-addblock mBlocks blockName)). Once the block is created, all drawing operations should be performed within the block space. The next two lines demonstrate how to draw a line and an arc inside the newly created block mBlock: (apa-addLine mBlock p24 p10); draws a line, and (apa-addArc mBlock o4 r (angle o4 p28) (angle o4 p27)); draws an arc. The Get-Blockname function is a custom utility used to generate a valid block name. The functions apa-addLine and apa-addArc are part of the AP-API (Artful Programming API), a specialized development toolkit designed to enhance programming efficiency and flexibility through artistic and technical methods. Pp Plastic Plywood,Pp Plastic Sheets,Moisture-Resistant Plywood,Versatile Construction Plywood RILICO , https://www.rilico.com