{"id":643,"date":"2021-04-12T14:44:13","date_gmt":"2021-04-12T18:44:13","guid":{"rendered":"https:\/\/opentextbc.ca\/autocad3d\/chapter\/surface-modeling-part-3\/"},"modified":"2021-11-04T11:38:19","modified_gmt":"2021-11-04T15:38:19","slug":"surface-modeling-part-3","status":"publish","type":"chapter","link":"https:\/\/opentextbc.ca\/autocad3d\/chapter\/surface-modeling-part-3\/","title":{"raw":"Module 14: Surface Modeling – Part 3","rendered":"Module 14: Surface Modeling – Part 3"},"content":{"raw":"
\n

Learning Outcomes<\/p>\n\n<\/header>\n

\n\nWhen you have completed this module, you will be able to:\n
    \n \t
  1. Describe a complex surface mesh and a region.<\/li>\n \t
  2. Apply the 3DMESH, REGION, and SUBTRACT commands.<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

    Drawing Complex Surface Meshes<\/h1>\nWhen an irregular complex mesh cannot be drawn using a geometrically generated surface, the 3DMESH command can be used to create it. The 3DMESH command uses a grid made of XYZ coordinates to generate the surface mesh. This command is used extensively when creating 3D topographical maps. It is also used in automobile and airplane design.\n
    \n

    AutoCAD Command: 3DMESH<\/p>\n\n<\/header>\n

    \n\nThe 3DMESH command is used to create an irregular complex surface mesh from a grid of XYZ coordinates.\n\nShortcut: none\n\n<\/div>\n<\/div>\n

    WORK ALONG: Drawing 3D Surface Meshes<\/h1>\n

    Step 1<\/h2>\nUsing the NEW command, start a new drawing using template: 3D Layout English<\/span>.\n

    Step 2<\/h2>\nSave and name the drawing: AutoCAD 3D Workalong 14-1<\/span>.\n

    Step 3<\/h2>\nSet layer: Model<\/span> as the current layer.\n

    Step 4<\/h2>\nSet the current visual style to 2D Wireframe, the current UCS to World, and the current view to SE Isometric. (Figure Step 4)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"600\"]\"\" Figure Step 4[\/caption]\n

    Step 5<\/h2>\nDraw a 5 X 4 grid as shown in the figure. Draw the grid lines 1 inch apart along both the X and Y axis. (Figure Step 5)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"346\"]\"\" Figure Step 5[\/caption]\n\n
    AUTHOR'S COMMENTS: <\/strong>The 3DMESH command is used to create an irregular complex surface mesh. It is created from XYZ coordinates created on an XY mesh. The XY mesh can be any shape but must lay on a single plane. You will be prompted for an M<\/span> and an N<\/span> value. The M<\/span> value is the number of columns located on the X<\/span> axis and the N<\/span> value is the number of rows located on the Y axis. The tighter the mesh, the smoother the surface will be. Enter the coordinates carefully as there is no undo feature. If you make an input error, you will have to start the command over again.\n<\/strong><\/div>\n

    Step 6<\/h2>\nSet layer: Surface 1<\/span> as the current layer and using Figure Step 6A as a reference, enter the 3D MESH command, as shown below, to create the 3D mesh. When complete, your drawing should appear as shown in the figure. (Figure Step 6A and 6B)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"500\"]\"\" Figure Step 6A[\/caption]\n\n4Figure Step 6BCommand: 3DMESH<\/strong>\n\nEnter size of mesh in M direction: 5<\/strong>\n\n(5 columns in the X direction. Count the grid lines not the spaces.)<\/em><\/span>\n\nEnter size of mesh in N direction: 4<\/strong>\n\n(4 rows in the Y direction. Count the grid lines, not the spaces.)<\/em><\/span>\n\nSpecify location for vertex (0, 0): 0,0,0.2<\/strong>\n\n(Enter the XYZ coordinates stating at bottom left corner which is X0Y0Z0.2. Then work up the Y axis to the top and then jump back down to X1,Y0.)<\/em><\/span>\n\nSpecify location for vertex (0, 1): 0,1,0.5<\/strong>\n\n(The 0.5 is entered here for clarity. If you enter .5 it will do the same thing.)<\/em><\/span>\n\nSpecify location for vertex (0, 2): 0,2,0.4<\/strong>\n\nSpecify location for vertex (0, 3): 0,3,0.3<\/strong>\n\nSpecify location for vertex (1, 0): 1,0,0.1<\/strong>\n\nSpecify location for vertex (1, 1): 1,1,0.3<\/strong>\n\nSpecify location for vertex (1, 2): 1,2,0.6<\/strong>\n\nSpecify location for vertex (1, 3): 1,3,0.5<\/strong>\n\nSpecify location for vertex (2, 0): 2,0,0<\/strong>\n\nSpecify location for vertex (2, 1): 2,1,-0.2<\/strong>\n\nSpecify location for vertex (2, 2): 2,2,-0.3<\/strong>\n\nSpecify location for vertex (2, 3): 2,3,-0.5<\/strong>\n\nSpecify location for vertex (3, 0): 3,0,0.1<\/strong>\n\nSpecify location for vertex (3, 1): 3,1,0.2<\/strong>\n\nSpecify location for vertex (3, 2): 3,2,0.2<\/strong>\n\nSpecify location for vertex (3, 3): 3,3,0.2<\/strong>\n\nSpecify location for vertex (4, 0): 4,0,0.3<\/strong>\n\nSpecify location for vertex (4, 1): 4,1,0.7<\/strong>\n\nSpecify location for vertex (4, 2): 4,2,0.5<\/strong>\n\nSpecify location for vertex (4, 3): 4,3,0.4<\/strong>\n\nCommand:\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"400\"]\"\" Figure Step 6B[\/caption]\n

    Step 7<\/h2>\nTurn layer Model<\/span> off and set the current visual style to: Realistic<\/span>. Your model should appear similar to the figure. (Figure Step 7)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"400\"]\"\" Figure Step 7[\/caption]\n\n
    AUTHOR'S COMMENTS: <\/strong>Since the 3DMESH is difficult to work with, it is sometimes easier to draw lines representing the Z coordinate. You can then snap to Z coordinate points rather then entering them on the keyboard.\n<\/strong><\/div>\n

    Step 8<\/h2>\nTurn layer: Surface 1<\/span> off and layer: Model<\/span> on. Set the current layer to: Model<\/span>. With the UCS set to World, draw lines from the each grid vertex in the Z distance. See Figure Step 6A for the Z value. Be careful as some are positive and some are negative. When the Z is 0, you do not have to draw anything. For example, the line at X0Y0 should be drawn 0.2 inches in the positive Z direction. When complete, the model should appear as shown in figure. (Figure Step 8)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"460\"]\"\" Figure Step 8[\/caption]\n

    Step 9<\/h2>\nSet layer: Surface 2<\/span> as the current layer and enter the 3DMESH as shown below. (Figure Step 9)\n\nCommand: 3DMESH<\/strong>\n\nEnter size of mesh in M direction: 5<\/strong>\n\nEnter size of mesh in N direction: 4<\/strong>\n\nSpecify location for vertex (0, 0): (end) <\/em>P1<\/strong>\n\n(With osnap enabled, snap to the end of the Z line. You may have to zoom in to ensure you are snapping to the correct end of the line.)<\/em><\/span>\n\nSpecify location for vertex (0, 1): (end) <\/em>P2<\/strong>\n\nSpecify location for vertex (0, 2):(end) <\/em>P3<\/strong>\n\nSpecify location for vertex (0, 3):(end) <\/em>P4<\/strong>\n\nSpecify location for vertex (1, 0):(end) <\/em>P5<\/strong>\n\nSpecify location for vertex (1, 1):(end) <\/em>P6<\/strong>\n\n(Continue until you complete the grid.)<\/em><\/span>\n\nCommand:\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"391\"]\"\" Figure Step 9[\/caption]\n

    Step 10<\/h2>\nSet the current visual style to: Realistic<\/span>. Your model should appear similar to the figure. (Figure Step 10)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"336\"]\"\" Figure Step 10[\/caption]\n

    Step 11<\/h2>\nSave and close the drawing.\n

    Regions<\/h1>\nA region <\/em><\/span>is a 2D solid and is created using a closed polyline, circle, ellipse or spline as the boundary. A region must lie on a 2D plane. See Figure 14-1.\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"366\"]\"\" Figure 14-1
    A Region[\/caption]\n\nWhile regions are not technically surfaces, they will shade and can be rendered, therefore, can be used to surface a model.\n\nIf the system variable DELOBJ is set to 1, AutoCAD will delete the closed object that was used as the boundary to create the region. In most cases, it is important for you to set this variable to 0 to retain the original object used to create the region.\n
    MUST KNOW:<\/strong> If the system variable DELOBJ is set to 1, the REGION command will delete the closed object that was used as the boundary to create the region. In most cases, it is important to set this variable to 0<\/span> to retain the original object(s).<\/div>\n
    \n

    AutoCAD Command: REGION<\/p>\n\n<\/header>\n

    \n\nThe REGION command is used to create a 2D solid within a closed object.\n\nShortcut: REG<\/strong>\n\n[caption id=\"attachment_614\" align=\"aligncenter\" width=\"488\"]\"\" Draw Toolbar[\/caption]\n\n[caption id=\"attachment_614\" align=\"aligncenter\" width=\"184\"]\"\" Draw Pull-down[\/caption]\n\n[caption id=\"attachment_614\" align=\"aligncenter\" width=\"268\"]\"\" Home Ribbon[\/caption]\n\n<\/div>\n<\/div>\n
    \n

    AutoCAD Command: SUBTRACT<\/p>\n\n<\/header>\n

    \n\nThe SUBTRACT command is used to subtract one solid from another.\n\nShortcut: SU<\/strong>\n\n[caption id=\"attachment_617\" align=\"aligncenter\" width=\"474\"]\"\" Modeling Toolbar[\/caption]\n\n[caption id=\"attachment_617\" align=\"aligncenter\" width=\"383\"]\"\" Modify Pulldown[\/caption]\n\n[caption id=\"attachment_617\" align=\"aligncenter\" width=\"286\"]\"\" Home Ribbon[\/caption]\n\n<\/div>\n<\/div>\n

    WORKALONG: Inserting and Subtracting Regions<\/h1>\n

    Step 1<\/h2>\nUsing the NEW command, start a new drawing using template: 3D Layout English<\/span>.\n

    Step 2<\/h2>\nSave and name the drawing: AutoCAD 3D Workalong 14-2<\/span>. (Figure Step 2)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"500\"]\"\" Figure Step 2
    Dimensioned Multiview Drawing[\/caption]\n

    Step 3<\/h2>\nSet layer: Model as the current layer, the current view to SE Isometric, the current UCS to Top, and the current visual style to 2D Wireframe.\n

    Step 4<\/h2>\nDraw the wireframe model of the multiview drawing. (Figure Step 4)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"327\"]\"\" Figure Step 4 Wireframe of Model - SE Isometric View[\/caption]\n

    Step 5<\/h2>\nEnter the DELOBJ system variable, as shown below, and set it 0. Command: DELOBJ<\/strong>\n\nEnter new value for DELOBJ <1>: 0<\/strong>\n\nCommand: DELOBJ<\/strong>\n\nEnter new value for DELOBJ <0>:\n\nCommand:\n

    Step 6<\/h2>\nMove the UCS to lie on top of the model as shown in the figure. Ensure that the positive Z axis is up and it is located at the centre of the circle. (Figure Step 6)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"309\"]\"\" Figure Step 6[\/caption]\n

    Step 7<\/h2>\nUsing what you learned earlier, use the PEDIT command to convert the lines and arcs to closed polylines. Check the objects with the Properties window to ensure that they are closed. (Figure Step 7)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"274\"]\"\" Figure Step 7[\/caption]\n\n
    AUTHOR'S COMMENTS: <\/strong><\/strong>If the bottom of the object is the same as the top it is easier to copy the closed plines rather then recreating them. You should delete the model lines and arcs that exist on the bottom first before copying the plines so that you do not duplicate the objects.<\/div>\n

    Step 8<\/h2>\nDelete all of the objects except the circles on the bottom of the model and then copy the plines you just created to the bottom. (Figure Step 8)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"274\"]\"\" Figure Step 8[\/caption]\n

    Step 9<\/h2>\nSet layer: Surface 1<\/span> as the current layer and enter the REGION command, as shown below, to create regions for the five closed objects on top of the model.\n\nCommand: REGION<\/strong>\n\nSelect objects: 1 found\n\n(Select each object, by picking them one at a time.)<\/em><\/span>\n\nSelect objects: 1 found, 2 total\n\nSelect objects: 1 found, 3 total\n\nSelect objects: 1 found, 4 total\n\nSelect objects: 1 found, 5 total\n\nSelect objects:\n\n5 loops extracted.\n\n5 Regions created.\n\nCommand:\n

    Step 10<\/h2>\nSet the current visual style to: Realistic<\/span>. Your model should appear as shown in the figure. (Figure Step 10)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"309\"]\"\" Figure Step 10[\/caption]\n

    Step 11<\/h2>\nUsing the REGION command, insert a region using the outside closed polyline. (Figure Step 11)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"332\"]\"\" Figure Step 11[\/caption]\n

    Step 12<\/h2>\nUsing the SUBTRACT command, subtract the five inner regions that you created in Step 9 from the region you created in Step 11. (Figure Step 12)\n\nCommand: SUBTRACT<\/strong>\n\nSelect solids and regions to subtract from ..\n\nSelect objects: 1 found\n\n(Select the large region.)<\/em><\/span>\n\nSelect objects:\n\n(Press Enter to indicate you have finished selecting.)<\/em><\/span>\n\nSelect solids and regions to subtract ..\n\nSelect objects: 1 found\n\n(Select each of the five smaller regions one at a time.)<\/em><\/span>\n\nSelect objects: 1 found, 2 total\n\nSelect objects: 1 found, 3 total\n\nSelect objects: 1 found, 4 total\n\nSelect objects: 1 found, 5 total\n\nSelect objects:\n\nCommand:\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"270\"]\"\" Figure Step 12[\/caption]\n\n
    AUTHOR'S COMMENTS: <\/strong>When using the SUBTRACT command, first select the region you want to subtract from and then press Enter. Then select the region(s) you want to subtract from it.<\/div>\n

    Step 13<\/h2>\nEnsure that layer: Surface Off<\/span> is off and then change the layer of the region you just created to layer: Surface Off<\/span>. Your model will now appear as shown in the figure. (Figure Step 13)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"253\"]\"\" Figure Step 13[\/caption]\n

    Step 14<\/h2>\nClick the UCS Origin icon and then snap to the centre of the circle on the bottom of the object. (Figure Step 14)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"600\"]\"\" Figure Step 14[\/caption]\n

    Step 15<\/h2>\nClick the Rotate X Axis UCS icon on the UCS toolbar and rotate it 180 degree rotation. This will rotate the UCS so that the positive Z direction is pointing down. (Figure Step 15)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"600\"]\"\" Figure Step 15[\/caption]\n

    Step 16<\/h2>\nUsing the 3DORBIT command, rotate the model around about 180 degrees and then using what you learned in Steps 10 to 12, insert the regions on the bottom. Subtract the inner regions as you did before. (Figure Step 16)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"307\"]\"\" Figure Step 16[\/caption]\n

    Step 17<\/h2>\nChange the layer of the regions to layer: Surface Off<\/span> and then using the RULESURF command, create surfaces on the edges and holes in the model. Create the surfaces on layer: Surface 1<\/span>. (Figure Step 17)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"293\"]\"\" Figure Step 17[\/caption]\n

    Step 18<\/h2>\nTurn layers: Model<\/span> and Construction<\/span> off and change the layer of the regions to layer: Surface 1<\/span>. Your completed model should appear as shown in the figure. Use the 3DORBIT command to check that the complete model is surfaced. (Figure Step 18)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"300\"]\"\" Figure Step 18[\/caption]\n\n
    MUST KNOW:<\/strong> A region is a two-dimensional solid created within a closed object. Regions can only be created within closed plines, circles, ellipses and splines. The complete region must lay on one plane. A region is actually a 2D solid.While regions are not technically surfaces, they will shade and can be rendered, therefore, can be used to surface a model.If the system variable DELOBJ is set to 1, AutoCAD will delete the closed object that was used to create the region. In most cases, it is important for you to set this variable to 0 to retain your original wireframe object used to create the region.\"\"<\/div>\n

    Key Principles<\/h1>\n
    \n

    Key Principles in Module 14<\/p>\n\n<\/header>\n

    \n
      \n \t
    1. A region is a two-dimensional solid created using a closed polyline, circle, ellipse, or spline as the Each region must lie on one plane.<\/li>\n \t
    2. While regions are not technically surfaces, they will shade and can be rendered, therefore, can be used to surface a A shaded region will only be visible when viewed from the positive Z direction of the UCS that was current when the region was created.<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

      Lab Exercise 14-1<\/h1>\nTime allowed: 60 minutes.\n\n\n\n\n
      Drawing Name<\/th>\nTemplate<\/th>\nUnits<\/th>\n<\/tr>\n
      AutoCAD 3D Lab 14-1<\/td>\n3D Layout Metric<\/td>\nMillimeters<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      Step 1<\/h2>\nOn layer: Model<\/span>, draw the grid shown below. The grid lines are an equal distance apart. (Figure Step 1A and 1B)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"289\"]\"\" Figure Step 1A
      Grid in SE Isometric View[\/caption]\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"378\"]\"\"
      Figure Step 1B
      Grid in Top View[\/caption]\n

      Step 2<\/h2>\nOn layer: Surface 2<\/span>, draw a 3D mesh on the grid using the 3D MESH command. The Z values are displayed at each vertex in Figure Step 1B. Set the current visual style to Realistic. It should appear as shown in the figure. (Figure Step 2)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"363\"]\"\" Figure Step 2[\/caption]\n

      Step 3<\/h2>\nSet the current visual style to 3D Wireframe. Turn layer Surface 2<\/span> off and on layer: Model<\/span>, draw lines representing the Z coordinates. (Figure Step 3)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"315\"]\"\" Figure Step 3[\/caption]\n

      Step 4<\/h2>\nOn layer: Surface 3<\/span>, draw a 3D mesh on the grid using the 3D MESH command and snapping to ends of the Z coordinates. Set the current visual style to Realistic. (Figure Step 4)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"395\"]\"\" Figure Step 4[\/caption]\n

      Step 5<\/h2>\nTurn layer: Model<\/span> off and the completed mesh should appear as shown in the figure. (Figure Step 5)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"395\"]\"\" Figure Step 5[\/caption]\n

      Step 6<\/h2>\nSet the Insertion Units, change the current UCS to World and check the model with the key.\n

      Step 7<\/h2>\nSave and close the drawing.\n

      Lab Exercise 14-2<\/h1>\nTime allowed: 40 minutes.\n\n\n\n\n
      Drawing Name<\/th>\nTemplate<\/th>\nUnits<\/th>\n<\/tr>\n
      AutoCAD 3D Lab 14-2<\/td>\n3D Layout Metric<\/td>\nMillimeters<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      Step 1<\/h2>\nDraw a wireframe model of the object. (Figure Step 1A and 1B)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"298\"]\"\" Figure Step 1A
      Completed Surfaced Model[\/caption]\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"500\"]\"\" Figure Step 1B
      Dimensioned Wireframe Model[\/caption]\n

      Step 2<\/h2>\nUse the 2D ARRAY command to speed the model construction.\n

      Step 3<\/h2>\nOn layer: Surface 1<\/span>, create regions for the top and bottom of the model.\n

      Step 4<\/h2>\nOn layer: Surface 1<\/span>, create ruled surfaces for the remainder of the surfaces. Ensure that the complete model is surfaced.\n

      Step 5<\/h2>\nSet the visual style to: Realistic<\/span>.\n

      Step 6<\/h2>\nFreeze layers: Construction<\/span> and Model<\/span>.\n

      Step 7<\/h2>\nUsing the 3DORBIT command, check the model for completeness\n

      Step 8<\/h2>\nSet the Insertion Units, change the current UCS to World and check the model with the key.\n

      Lab Exercise 14-3<\/h1>\nTime allowed: 30 minutes.\n\n\n\n\n
      Drawing Name<\/th>\nTemplate<\/th>\nUnits<\/th>\n<\/tr>\n
      AutoCAD 3D Lab 14-3<\/td>\nN\/A<\/td>\nMillimeters<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      Step 1<\/h2>\nOpen the drawing: AutoCAD 3D Lab 03-2<\/span>.\n

      Step 2<\/h2>\nSave the drawing with the name: AutoCAD 3D Lab 14-3<\/span>.\n

      Step 3<\/h2>\nOn layer: Surface 1<\/span>, create regions and surfaces on all sides and holes. (Figure Step 3)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"300\"]\"\" Figure Step 3
      Completed Surfaced Model[\/caption]\n

      Step 4<\/h2>\nSet the visual style to Realistic<\/span>.\n

      Step 5<\/h2>\nFreeze layers: Construction<\/span> and Model<\/span>.\n

      Step 6<\/h2>\nUsing the 3DORBIT command, check the model for completeness\n

      Step 7<\/h2>\nSave and close the drawing.\n
      \n\nAUTHOR'S COMMENTS: <\/strong>Do not be concerned if your shaded model does not match the figures in the module exactly. There are many visual style settings that can be set to change the look of the shaded model. For now, all you should be concerned about is being able to surface the model.The advanced features of customizing visual styles are taught in the AutoCAD 3D Advanced book.\n\n<\/div>\n

      Lab Exercise 14-4<\/h1>\nTime allowed: 50 minutes.\n\n\n\n\n
      Drawing Name<\/th>\nTemplate<\/th>\nUnits<\/th>\n<\/tr>\n
      AutoCAD 3D Lab 14-4<\/td>\nN\/A<\/td>\nInches<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      Step 1<\/h2>\nOpen the drawing: AutoCAD 3D Lab 09-3<\/span>.\n

      Step 2<\/h2>\nSave the drawing with the name: AutoCAD 3D Lab 14-4<\/span>.\n

      Step 3<\/h2>\nOn layer: Surface 2<\/span>, create regions and surfaces on all sides and holes. (Figure Step 3)\n\n[caption id=\"attachment_642\" align=\"aligncenter\" width=\"407\"]\"\" Figure Step 3
      Completed Surfaced Model[\/caption]\n

      Step 4<\/h2>\nSet the visual style to: Realistic<\/span>.\n

      Step 5<\/h2>\nFreeze layers: Construction<\/span> and Model<\/span>.\n

      Step 6<\/h2>\nUsing the 3DORBIT command, check the model for completeness\n

      Step 7<\/h2>\nSave and close the drawing.\n
      \n\nAUTHOR'S COMMENTS: <\/strong>Do not be concerned if your shaded model does not match the figures in the module exactly. There are many visual style settings that can be set to change the look of the shaded model. For now, all you should be concerned about is being able to surface the model. The advanced features of customizing visual styles are taught in the AutoCAD 3D Advanced book.\n\n<\/div>","rendered":"
      \n
      \n

      Learning Outcomes<\/p>\n<\/header>\n

      \n

      When you have completed this module, you will be able to:<\/p>\n

        \n
      1. Describe a complex surface mesh and a region.<\/li>\n
      2. Apply the 3DMESH, REGION, and SUBTRACT commands.<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

        Drawing Complex Surface Meshes<\/h1>\n

        When an irregular complex mesh cannot be drawn using a geometrically generated surface, the 3DMESH command can be used to create it. The 3DMESH command uses a grid made of XYZ coordinates to generate the surface mesh. This command is used extensively when creating 3D topographical maps. It is also used in automobile and airplane design.<\/p>\n

        \n
        \n

        AutoCAD Command: 3DMESH<\/p>\n<\/header>\n

        \n

        The 3DMESH command is used to create an irregular complex surface mesh from a grid of XYZ coordinates.<\/p>\n

        Shortcut: none<\/p>\n<\/div>\n<\/div>\n

        WORK ALONG: Drawing 3D Surface Meshes<\/h1>\n

        Step 1<\/h2>\n

        Using the NEW command, start a new drawing using template: 3D Layout English<\/span>.<\/p>\n

        Step 2<\/h2>\n

        Save and name the drawing: AutoCAD 3D Workalong 14-1<\/span>.<\/p>\n

        Step 3<\/h2>\n

        Set layer: Model<\/span> as the current layer.<\/p>\n

        Step 4<\/h2>\n

        Set the current visual style to 2D Wireframe, the current UCS to World, and the current view to SE Isometric. (Figure Step 4)<\/p>\n

        \"\"
        Figure Step 4<\/figcaption><\/figure>\n

        Step 5<\/h2>\n

        Draw a 5 X 4 grid as shown in the figure. Draw the grid lines 1 inch apart along both the X and Y axis. (Figure Step 5)<\/p>\n

        \"\"
        Figure Step 5<\/figcaption><\/figure>\n
        AUTHOR’S COMMENTS: <\/strong>The 3DMESH command is used to create an irregular complex surface mesh. It is created from XYZ coordinates created on an XY mesh. The XY mesh can be any shape but must lay on a single plane. You will be prompted for an M<\/span> and an N<\/span> value. The M<\/span> value is the number of columns located on the X<\/span> axis and the N<\/span> value is the number of rows located on the Y axis. The tighter the mesh, the smoother the surface will be. Enter the coordinates carefully as there is no undo feature. If you make an input error, you will have to start the command over again.
        \n<\/strong><\/div>\n

        Step 6<\/h2>\n

        Set layer: Surface 1<\/span> as the current layer and using Figure Step 6A as a reference, enter the 3D MESH command, as shown below, to create the 3D mesh. When complete, your drawing should appear as shown in the figure. (Figure Step 6A and 6B)<\/p>\n

        \"\"
        Figure Step 6A<\/figcaption><\/figure>\n

        4Figure Step 6BCommand: 3DMESH<\/strong><\/p>\n

        Enter size of mesh in M direction: 5<\/strong><\/p>\n

        (5 columns in the X direction. Count the grid lines not the spaces.)<\/em><\/span><\/p>\n

        Enter size of mesh in N direction: 4<\/strong><\/p>\n

        (4 rows in the Y direction. Count the grid lines, not the spaces.)<\/em><\/span><\/p>\n

        Specify location for vertex (0, 0): 0,0,0.2<\/strong><\/p>\n

        (Enter the XYZ coordinates stating at bottom left corner which is X0Y0Z0.2. Then work up the Y axis to the top and then jump back down to X1,Y0.)<\/em><\/span><\/p>\n

        Specify location for vertex (0, 1): 0,1,0.5<\/strong><\/p>\n

        (The 0.5 is entered here for clarity. If you enter .5 it will do the same thing.)<\/em><\/span><\/p>\n

        Specify location for vertex (0, 2): 0,2,0.4<\/strong><\/p>\n

        Specify location for vertex (0, 3): 0,3,0.3<\/strong><\/p>\n

        Specify location for vertex (1, 0): 1,0,0.1<\/strong><\/p>\n

        Specify location for vertex (1, 1): 1,1,0.3<\/strong><\/p>\n

        Specify location for vertex (1, 2): 1,2,0.6<\/strong><\/p>\n

        Specify location for vertex (1, 3): 1,3,0.5<\/strong><\/p>\n

        Specify location for vertex (2, 0): 2,0,0<\/strong><\/p>\n

        Specify location for vertex (2, 1): 2,1,-0.2<\/strong><\/p>\n

        Specify location for vertex (2, 2): 2,2,-0.3<\/strong><\/p>\n

        Specify location for vertex (2, 3): 2,3,-0.5<\/strong><\/p>\n

        Specify location for vertex (3, 0): 3,0,0.1<\/strong><\/p>\n

        Specify location for vertex (3, 1): 3,1,0.2<\/strong><\/p>\n

        Specify location for vertex (3, 2): 3,2,0.2<\/strong><\/p>\n

        Specify location for vertex (3, 3): 3,3,0.2<\/strong><\/p>\n

        Specify location for vertex (4, 0): 4,0,0.3<\/strong><\/p>\n

        Specify location for vertex (4, 1): 4,1,0.7<\/strong><\/p>\n

        Specify location for vertex (4, 2): 4,2,0.5<\/strong><\/p>\n

        Specify location for vertex (4, 3): 4,3,0.4<\/strong><\/p>\n

        Command:<\/p>\n

        \"\"
        Figure Step 6B<\/figcaption><\/figure>\n

        Step 7<\/h2>\n

        Turn layer Model<\/span> off and set the current visual style to: Realistic<\/span>. Your model should appear similar to the figure. (Figure Step 7)<\/p>\n

        \"\"
        Figure Step 7<\/figcaption><\/figure>\n
        AUTHOR’S COMMENTS: <\/strong>Since the 3DMESH is difficult to work with, it is sometimes easier to draw lines representing the Z coordinate. You can then snap to Z coordinate points rather then entering them on the keyboard.
        \n<\/strong><\/div>\n

        Step 8<\/h2>\n

        Turn layer: Surface 1<\/span> off and layer: Model<\/span> on. Set the current layer to: Model<\/span>. With the UCS set to World, draw lines from the each grid vertex in the Z distance. See Figure Step 6A for the Z value. Be careful as some are positive and some are negative. When the Z is 0, you do not have to draw anything. For example, the line at X0Y0 should be drawn 0.2 inches in the positive Z direction. When complete, the model should appear as shown in figure. (Figure Step 8)<\/p>\n

        \"\"
        Figure Step 8<\/figcaption><\/figure>\n

        Step 9<\/h2>\n

        Set layer: Surface 2<\/span> as the current layer and enter the 3DMESH as shown below. (Figure Step 9)<\/p>\n

        Command: 3DMESH<\/strong><\/p>\n

        Enter size of mesh in M direction: 5<\/strong><\/p>\n

        Enter size of mesh in N direction: 4<\/strong><\/p>\n

        Specify location for vertex (0, 0): (end) <\/em>P1<\/strong><\/p>\n

        (With osnap enabled, snap to the end of the Z line. You may have to zoom in to ensure you are snapping to the correct end of the line.)<\/em><\/span><\/p>\n

        Specify location for vertex (0, 1): (end) <\/em>P2<\/strong><\/p>\n

        Specify location for vertex (0, 2):(end) <\/em>P3<\/strong><\/p>\n

        Specify location for vertex (0, 3):(end) <\/em>P4<\/strong><\/p>\n

        Specify location for vertex (1, 0):(end) <\/em>P5<\/strong><\/p>\n

        Specify location for vertex (1, 1):(end) <\/em>P6<\/strong><\/p>\n

        (Continue until you complete the grid.)<\/em><\/span><\/p>\n

        Command:<\/p>\n

        \"\"
        Figure Step 9<\/figcaption><\/figure>\n

        Step 10<\/h2>\n

        Set the current visual style to: Realistic<\/span>. Your model should appear similar to the figure. (Figure Step 10)<\/p>\n

        \"\"
        Figure Step 10<\/figcaption><\/figure>\n

        Step 11<\/h2>\n

        Save and close the drawing.<\/p>\n

        Regions<\/h1>\n

        A region <\/em><\/span>is a 2D solid and is created using a closed polyline, circle, ellipse or spline as the boundary. A region must lie on a 2D plane. See Figure 14-1.<\/p>\n

        \"\"
        Figure 14-1
        A Region<\/figcaption><\/figure>\n

        While regions are not technically surfaces, they will shade and can be rendered, therefore, can be used to surface a model.<\/p>\n

        If the system variable DELOBJ is set to 1, AutoCAD will delete the closed object that was used as the boundary to create the region. In most cases, it is important for you to set this variable to 0 to retain the original object used to create the region.<\/p>\n

        MUST KNOW:<\/strong> If the system variable DELOBJ is set to 1, the REGION command will delete the closed object that was used as the boundary to create the region. In most cases, it is important to set this variable to 0<\/span> to retain the original object(s).<\/div>\n
        \n
        \n

        AutoCAD Command: REGION<\/p>\n<\/header>\n

        \n

        The REGION command is used to create a 2D solid within a closed object.<\/p>\n

        Shortcut: REG<\/strong><\/p>\n

        \"\"
        Draw Toolbar<\/figcaption><\/figure>\n
        \"\"
        Draw Pull-down<\/figcaption><\/figure>\n
        \"\"
        Home Ribbon<\/figcaption><\/figure>\n<\/div>\n<\/div>\n
        \n
        \n

        AutoCAD Command: SUBTRACT<\/p>\n<\/header>\n

        \n

        The SUBTRACT command is used to subtract one solid from another.<\/p>\n

        Shortcut: SU<\/strong><\/p>\n

        \"\"
        Modeling Toolbar<\/figcaption><\/figure>\n
        \"\"
        Modify Pulldown<\/figcaption><\/figure>\n
        \"\"
        Home Ribbon<\/figcaption><\/figure>\n<\/div>\n<\/div>\n

        WORKALONG: Inserting and Subtracting Regions<\/h1>\n

        Step 1<\/h2>\n

        Using the NEW command, start a new drawing using template: 3D Layout English<\/span>.<\/p>\n

        Step 2<\/h2>\n

        Save and name the drawing: AutoCAD 3D Workalong 14-2<\/span>. (Figure Step 2)<\/p>\n

        \"\"
        Figure Step 2
        Dimensioned Multiview Drawing<\/figcaption><\/figure>\n

        Step 3<\/h2>\n

        Set layer: Model as the current layer, the current view to SE Isometric, the current UCS to Top, and the current visual style to 2D Wireframe.<\/p>\n

        Step 4<\/h2>\n

        Draw the wireframe model of the multiview drawing. (Figure Step 4)<\/p>\n

        \"\"
        Figure Step 4 Wireframe of Model – SE Isometric View<\/figcaption><\/figure>\n

        Step 5<\/h2>\n

        Enter the DELOBJ system variable, as shown below, and set it 0. Command: DELOBJ<\/strong><\/p>\n

        Enter new value for DELOBJ <1>: 0<\/strong><\/p>\n

        Command: DELOBJ<\/strong><\/p>\n

        Enter new value for DELOBJ <0>:<\/p>\n

        Command:<\/p>\n

        Step 6<\/h2>\n

        Move the UCS to lie on top of the model as shown in the figure. Ensure that the positive Z axis is up and it is located at the centre of the circle. (Figure Step 6)<\/p>\n

        \"\"
        Figure Step 6<\/figcaption><\/figure>\n

        Step 7<\/h2>\n

        Using what you learned earlier, use the PEDIT command to convert the lines and arcs to closed polylines. Check the objects with the Properties window to ensure that they are closed. (Figure Step 7)<\/p>\n

        \"\"
        Figure Step 7<\/figcaption><\/figure>\n
        AUTHOR’S COMMENTS: <\/strong><\/strong>If the bottom of the object is the same as the top it is easier to copy the closed plines rather then recreating them. You should delete the model lines and arcs that exist on the bottom first before copying the plines so that you do not duplicate the objects.<\/div>\n

        Step 8<\/h2>\n

        Delete all of the objects except the circles on the bottom of the model and then copy the plines you just created to the bottom. (Figure Step 8)<\/p>\n

        \"\"
        Figure Step 8<\/figcaption><\/figure>\n

        Step 9<\/h2>\n

        Set layer: Surface 1<\/span> as the current layer and enter the REGION command, as shown below, to create regions for the five closed objects on top of the model.<\/p>\n

        Command: REGION<\/strong><\/p>\n

        Select objects: 1 found<\/p>\n

        (Select each object, by picking them one at a time.)<\/em><\/span><\/p>\n

        Select objects: 1 found, 2 total<\/p>\n

        Select objects: 1 found, 3 total<\/p>\n

        Select objects: 1 found, 4 total<\/p>\n

        Select objects: 1 found, 5 total<\/p>\n

        Select objects:<\/p>\n

        5 loops extracted.<\/p>\n

        5 Regions created.<\/p>\n

        Command:<\/p>\n

        Step 10<\/h2>\n

        Set the current visual style to: Realistic<\/span>. Your model should appear as shown in the figure. (Figure Step 10)<\/p>\n

        \"\"
        Figure Step 10<\/figcaption><\/figure>\n

        Step 11<\/h2>\n

        Using the REGION command, insert a region using the outside closed polyline. (Figure Step 11)<\/p>\n

        \"\"
        Figure Step 11<\/figcaption><\/figure>\n

        Step 12<\/h2>\n

        Using the SUBTRACT command, subtract the five inner regions that you created in Step 9 from the region you created in Step 11. (Figure Step 12)<\/p>\n

        Command: SUBTRACT<\/strong><\/p>\n

        Select solids and regions to subtract from ..<\/p>\n

        Select objects: 1 found<\/p>\n

        (Select the large region.)<\/em><\/span><\/p>\n

        Select objects:<\/p>\n

        (Press Enter to indicate you have finished selecting.)<\/em><\/span><\/p>\n

        Select solids and regions to subtract ..<\/p>\n

        Select objects: 1 found<\/p>\n

        (Select each of the five smaller regions one at a time.)<\/em><\/span><\/p>\n

        Select objects: 1 found, 2 total<\/p>\n

        Select objects: 1 found, 3 total<\/p>\n

        Select objects: 1 found, 4 total<\/p>\n

        Select objects: 1 found, 5 total<\/p>\n

        Select objects:<\/p>\n

        Command:<\/p>\n

        \"\"
        Figure Step 12<\/figcaption><\/figure>\n
        AUTHOR’S COMMENTS: <\/strong>When using the SUBTRACT command, first select the region you want to subtract from and then press Enter. Then select the region(s) you want to subtract from it.<\/div>\n

        Step 13<\/h2>\n

        Ensure that layer: Surface Off<\/span> is off and then change the layer of the region you just created to layer: Surface Off<\/span>. Your model will now appear as shown in the figure. (Figure Step 13)<\/p>\n

        \"\"
        Figure Step 13<\/figcaption><\/figure>\n

        Step 14<\/h2>\n

        Click the UCS Origin icon and then snap to the centre of the circle on the bottom of the object. (Figure Step 14)<\/p>\n

        \"\"
        Figure Step 14<\/figcaption><\/figure>\n

        Step 15<\/h2>\n

        Click the Rotate X Axis UCS icon on the UCS toolbar and rotate it 180 degree rotation. This will rotate the UCS so that the positive Z direction is pointing down. (Figure Step 15)<\/p>\n

        \"\"
        Figure Step 15<\/figcaption><\/figure>\n

        Step 16<\/h2>\n

        Using the 3DORBIT command, rotate the model around about 180 degrees and then using what you learned in Steps 10 to 12, insert the regions on the bottom. Subtract the inner regions as you did before. (Figure Step 16)<\/p>\n

        \"\"
        Figure Step 16<\/figcaption><\/figure>\n

        Step 17<\/h2>\n

        Change the layer of the regions to layer: Surface Off<\/span> and then using the RULESURF command, create surfaces on the edges and holes in the model. Create the surfaces on layer: Surface 1<\/span>. (Figure Step 17)<\/p>\n

        \"\"
        Figure Step 17<\/figcaption><\/figure>\n

        Step 18<\/h2>\n

        Turn layers: Model<\/span> and Construction<\/span> off and change the layer of the regions to layer: Surface 1<\/span>. Your completed model should appear as shown in the figure. Use the 3DORBIT command to check that the complete model is surfaced. (Figure Step 18)<\/p>\n

        \"\"
        Figure Step 18<\/figcaption><\/figure>\n
        MUST KNOW:<\/strong> A region is a two-dimensional solid created within a closed object. Regions can only be created within closed plines, circles, ellipses and splines. The complete region must lay on one plane. A region is actually a 2D solid.While regions are not technically surfaces, they will shade and can be rendered, therefore, can be used to surface a model.If the system variable DELOBJ is set to 1, AutoCAD will delete the closed object that was used to create the region. In most cases, it is important for you to set this variable to 0 to retain your original wireframe object used to create the region.\"\"<\/div>\n

        Key Principles<\/h1>\n
        \n
        \n

        Key Principles in Module 14<\/p>\n<\/header>\n

        \n
          \n
        1. A region is a two-dimensional solid created using a closed polyline, circle, ellipse, or spline as the Each region must lie on one plane.<\/li>\n
        2. While regions are not technically surfaces, they will shade and can be rendered, therefore, can be used to surface a A shaded region will only be visible when viewed from the positive Z direction of the UCS that was current when the region was created.<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

          Lab Exercise 14-1<\/h1>\n

          Time allowed: 60 minutes.<\/p>\n\n\n\n\n
          Drawing Name<\/th>\nTemplate<\/th>\nUnits<\/th>\n<\/tr>\n
          AutoCAD 3D Lab 14-1<\/td>\n3D Layout Metric<\/td>\nMillimeters<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          Step 1<\/h2>\n

          On layer: Model<\/span>, draw the grid shown below. The grid lines are an equal distance apart. (Figure Step 1A and 1B)<\/p>\n

          \"\"
          Figure Step 1A
          Grid in SE Isometric View<\/figcaption><\/figure>\n
          \"\"
          Figure Step 1B
          Grid in Top View<\/figcaption><\/figure>\n

          Step 2<\/h2>\n

          On layer: Surface 2<\/span>, draw a 3D mesh on the grid using the 3D MESH command. The Z values are displayed at each vertex in Figure Step 1B. Set the current visual style to Realistic. It should appear as shown in the figure. (Figure Step 2)<\/p>\n

          \"\"
          Figure Step 2<\/figcaption><\/figure>\n

          Step 3<\/h2>\n

          Set the current visual style to 3D Wireframe. Turn layer Surface 2<\/span> off and on layer: Model<\/span>, draw lines representing the Z coordinates. (Figure Step 3)<\/p>\n

          \"\"
          Figure Step 3<\/figcaption><\/figure>\n

          Step 4<\/h2>\n

          On layer: Surface 3<\/span>, draw a 3D mesh on the grid using the 3D MESH command and snapping to ends of the Z coordinates. Set the current visual style to Realistic. (Figure Step 4)<\/p>\n

          \"\"
          Figure Step 4<\/figcaption><\/figure>\n

          Step 5<\/h2>\n

          Turn layer: Model<\/span> off and the completed mesh should appear as shown in the figure. (Figure Step 5)<\/p>\n

          \"\"
          Figure Step 5<\/figcaption><\/figure>\n

          Step 6<\/h2>\n

          Set the Insertion Units, change the current UCS to World and check the model with the key.<\/p>\n

          Step 7<\/h2>\n

          Save and close the drawing.<\/p>\n

          Lab Exercise 14-2<\/h1>\n

          Time allowed: 40 minutes.<\/p>\n\n\n\n\n
          Drawing Name<\/th>\nTemplate<\/th>\nUnits<\/th>\n<\/tr>\n
          AutoCAD 3D Lab 14-2<\/td>\n3D Layout Metric<\/td>\nMillimeters<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          Step 1<\/h2>\n

          Draw a wireframe model of the object. (Figure Step 1A and 1B)<\/p>\n

          \"\"
          Figure Step 1A
          Completed Surfaced Model<\/figcaption><\/figure>\n
          \"\"
          Figure Step 1B
          Dimensioned Wireframe Model<\/figcaption><\/figure>\n

          Step 2<\/h2>\n

          Use the 2D ARRAY command to speed the model construction.<\/p>\n

          Step 3<\/h2>\n

          On layer: Surface 1<\/span>, create regions for the top and bottom of the model.<\/p>\n

          Step 4<\/h2>\n

          On layer: Surface 1<\/span>, create ruled surfaces for the remainder of the surfaces. Ensure that the complete model is surfaced.<\/p>\n

          Step 5<\/h2>\n

          Set the visual style to: Realistic<\/span>.<\/p>\n

          Step 6<\/h2>\n

          Freeze layers: Construction<\/span> and Model<\/span>.<\/p>\n

          Step 7<\/h2>\n

          Using the 3DORBIT command, check the model for completeness<\/p>\n

          Step 8<\/h2>\n

          Set the Insertion Units, change the current UCS to World and check the model with the key.<\/p>\n

          Lab Exercise 14-3<\/h1>\n

          Time allowed: 30 minutes.<\/p>\n\n\n\n\n
          Drawing Name<\/th>\nTemplate<\/th>\nUnits<\/th>\n<\/tr>\n
          AutoCAD 3D Lab 14-3<\/td>\nN\/A<\/td>\nMillimeters<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          Step 1<\/h2>\n

          Open the drawing: AutoCAD 3D Lab 03-2<\/span>.<\/p>\n

          Step 2<\/h2>\n

          Save the drawing with the name: AutoCAD 3D Lab 14-3<\/span>.<\/p>\n

          Step 3<\/h2>\n

          On layer: Surface 1<\/span>, create regions and surfaces on all sides and holes. (Figure Step 3)<\/p>\n

          \"\"
          Figure Step 3
          Completed Surfaced Model<\/figcaption><\/figure>\n

          Step 4<\/h2>\n

          Set the visual style to Realistic<\/span>.<\/p>\n

          Step 5<\/h2>\n

          Freeze layers: Construction<\/span> and Model<\/span>.<\/p>\n

          Step 6<\/h2>\n

          Using the 3DORBIT command, check the model for completeness<\/p>\n

          Step 7<\/h2>\n

          Save and close the drawing.<\/p>\n

          \n

          AUTHOR’S COMMENTS: <\/strong>Do not be concerned if your shaded model does not match the figures in the module exactly. There are many visual style settings that can be set to change the look of the shaded model. For now, all you should be concerned about is being able to surface the model.The advanced features of customizing visual styles are taught in the AutoCAD 3D Advanced book.<\/p>\n<\/div>\n

          Lab Exercise 14-4<\/h1>\n

          Time allowed: 50 minutes.<\/p>\n\n\n\n\n
          Drawing Name<\/th>\nTemplate<\/th>\nUnits<\/th>\n<\/tr>\n
          AutoCAD 3D Lab 14-4<\/td>\nN\/A<\/td>\nInches<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          Step 1<\/h2>\n

          Open the drawing: AutoCAD 3D Lab 09-3<\/span>.<\/p>\n

          Step 2<\/h2>\n

          Save the drawing with the name: AutoCAD 3D Lab 14-4<\/span>.<\/p>\n

          Step 3<\/h2>\n

          On layer: Surface 2<\/span>, create regions and surfaces on all sides and holes. (Figure Step 3)<\/p>\n

          \"\"
          Figure Step 3
          Completed Surfaced Model<\/figcaption><\/figure>\n

          Step 4<\/h2>\n

          Set the visual style to: Realistic<\/span>.<\/p>\n

          Step 5<\/h2>\n

          Freeze layers: Construction<\/span> and Model<\/span>.<\/p>\n

          Step 6<\/h2>\n

          Using the 3DORBIT command, check the model for completeness<\/p>\n

          Step 7<\/h2>\n

          Save and close the drawing.<\/p>\n

          \n

          AUTHOR’S COMMENTS: <\/strong>Do not be concerned if your shaded model does not match the figures in the module exactly. There are many visual style settings that can be set to change the look of the shaded model. For now, all you should be concerned about is being able to surface the model. The advanced features of customizing visual styles are taught in the AutoCAD 3D Advanced book.<\/p>\n<\/div>\n","protected":false},"author":90,"menu_order":3,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-643","chapter","type-chapter","status-publish","hentry"],"part":517,"_links":{"self":[{"href":"https:\/\/opentextbc.ca\/autocad3d\/wp-json\/pressbooks\/v2\/chapters\/643","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/opentextbc.ca\/autocad3d\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/opentextbc.ca\/autocad3d\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/opentextbc.ca\/autocad3d\/wp-json\/wp\/v2\/users\/90"}],"version-history":[{"count":1,"href":"https:\/\/opentextbc.ca\/autocad3d\/wp-json\/pressbooks\/v2\/chapters\/643\/revisions"}],"predecessor-version":[{"id":644,"href":"https:\/\/opentextbc.ca\/autocad3d\/wp-json\/pressbooks\/v2\/chapters\/643\/revisions\/644"}],"part":[{"href":"https:\/\/opentextbc.ca\/autocad3d\/wp-json\/pressbooks\/v2\/parts\/517"}],"metadata":[{"href":"https:\/\/opentextbc.ca\/autocad3d\/wp-json\/pressbooks\/v2\/chapters\/643\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/opentextbc.ca\/autocad3d\/wp-json\/wp\/v2\/media?parent=643"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/opentextbc.ca\/autocad3d\/wp-json\/pressbooks\/v2\/chapter-type?post=643"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/opentextbc.ca\/autocad3d\/wp-json\/wp\/v2\/contributor?post=643"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/opentextbc.ca\/autocad3d\/wp-json\/wp\/v2\/license?post=643"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}