TAILIEUCHUNG - Modelling with AutoCAD 2011 Part 6

Tham khảo tài liệu 'modelling with autocad 2011 part 6', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 3D geometry commands 143 2 Refer to Fig. which again only displays the 3D viewport 3 Menu bar with Modify-3D Operation-Mirror 3D and prompt Select objects respond window the model then right-click prompt Specify first point on mirror plane 3 points or Object Last . enter XY R - the XY plane option prompt Specify point on XY plane 0 0 0 and right click prompt Delete source objects Yes No and enter Y R then PAN to suit - fig b 4 The model at this stage has the AMBIGUITY effect of all 3D models . are you looking down or looking up Hence HIDE 5 At the command line enter MIRROR3D R and prompt Select objects respond window the model then right-click prompt Specify first point on mirror plane respond Intersection icon and pick pt1 prompt Specify second point on mirror plane respond Intersection icon and pick pt2 prompt Specify third point on mirror plane respond Intersection icon and pick pt3 prompt Delete source object Yes No and enter Y R then PAN to suit then HIDE - fig c Figure The MIRROR 3D command using 3DGEOM model. 144 Modelling with AutoCAD 2002 6 7 8 9 1 2 3 4 5 6 7 8 Activate the Mirror 3D command and a window the model the right-click b select the YZ plane option c pick intersection of point A as a point on the plane d enter Y to delete source objects prompt e pan and hide - fig d Using the Mirror 3D command a window the model the right-click b select the ZX option c enter -50 -50 as a point on the ZX plane d accept the N default delete source objects option e pan and hide - fig e Shade and 3D orbit then investigate the layout tabs Save if required. We will not refer to this drawing again. 3D Array The 3D array command is similar in operation to the 2D array. Both rectangular and polar arrays are possible the rectangular array having rows and columns as well as levels in the Z direction. The result of a 3D polar array requires some thought Rectangular Open the 3DGEOM drawing UCS BASE Model tab active and refer to Fig. which displays the .

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