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Found 2 results

1. ## Extract mass properties from 3D bodies in lisp and use them in calculation whitin the program

Dear Members! Problem part I I now turn to you with the question of how to extract certain data from the "_massprop" command and assign it to a variable immediately. I am working on an automation task where a cable cross section has to be pulled out on a given 3D polilyne path. I need to extract the volume of the resulting 3D solid to calculate the volume of the displaced top. Problem part II Similarly, I should extract the length of the extracted 3D tube from the property table. This data is available if I extract the cross section with the _extrude / path command. I have to assign the extracted data to a variable within the lisp program to perform a mathematical operation on it. As follows: (setq V (volume data from the _massprop command)) (setq Vm (/ V (1000 ^ 3)); converting the mm3 to m3 Problem part III I would like to write the obtained result in a table in the model space. Column 1: "Volume of ground displaced by the pipeline" Colum 2: "The result of the calculation (which will be the value of a variable Vm)" Here is my code for calculation the cross section of the cable and to extrude it. The polyline must to be placet at '(0 0 0) All help comes in handy: (defun c:kabel(/ K_A K_AKEM K_DKE K_DKEM K_H K_L K_PT0 K_PT1 K_PT2 K_PT3 K_PT4 K_PT5 K_RKE K_RKEM K_RTOT K_SS1 K_V PIR) (setq K_Dke (getreal "Adja meg a kábel ér külső átmérőjét:")); Give me the diameter of the subcable (setq K_Akem (getreal "Adja meg a kábel ér magjának keresztmetszet területét (mm2)-ben) :")); Give me the copper cross section area (setq K_L (getreal "Adja meg a beillesztett polilyne teljes hossszát m-ben:")); Give me the length of the cable route (setq pir 3.141592654) (setq K_Dkem (sqrt (/ (* K_Akem 4) pir))); The copper diameter (setq K_Rke (/ K_Dke 2)) (setq K_Rkem (/ K_Dkem 2)) (setq K_pt0 '(0 0 0)) ; The low right cable part (you have 3 of them) (setq K_pt1 (polar K_pt0 (* pi 0.666666666666) K_Dke )); The center position of the upper cable part (setq K_pt2 (polar K_pt0 pi K_Dke)); The center of the third cable part ( part 3 of 3) (setq K_h (* K_Dke (sin (/ pi 3)))) (setq K_pt3 (polar K_pt2 0 (/ K_Dke 2))) (setq K_pt4 (polar K_pt3 (/ pi 2) (* K_h 0.333333333333)));The outer circle center point calculated from 3 cabel parts which are 120 degree from each other, like a mercedes logo (setq K_Rtot (+ K_Rke (* K_h 0.666666666666666))); Radius of the cable pipe (setq K_pt5 (polar K_pt4 (/ pi 2) K_Rtot)) (command "_circle" K_pt4 K_Rtot "") (setq K_ss1 (ssget "_L")) (command "_extrude" "_Mode" "_solid" K_ss1 "" "_path" '(0 0 -0.1) "") (setq K_A (* (* (/ K_Rtot 1000) (/ K_Rtot 1000)) pir)) (setq K_V (* K_A K_L)) (alert (strcat "The volume of the cable=" (rtos K_V) "m3")) (princ) )
2. ## Remove Material Assignment from Part

Hello, Im using AutoCAD, AutoCAD Mechanical 2009 and Mechanical Desktop 2009 I have parts that have a material assigned to them through the 'MASSPROPS' dialog box. When assigning the material to a part, material properties associated with that part are assigned as well. Is there a way to either remove the material assignment or create a "dummy" material with material property values set to 0 and assign this new material to the part using AutoLISP? If not AutoLISP, is it possible using any other code type?
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