drawing a 3d dresser in autocad 2017

Bones 3D and Surface Modelling

Introduction

Although AutoCAD has a number of commands for creating special 3D objects, a lot can be accomplished by irresolute the properties of basic 2nd objects like polylines. About 2d objects tin exist given a thickness using the thickness choice in the Backdrop (DDCHPROP) control. Although objects with a thickness can exist said to exist extruded, this should non be confused with the EXTRUDE command which creates solid extrusions; giving an object thickness produces a surface extrusion. All objects can exist given an superlative by moving them in the Z management using the MOVE control. With a combination of the MOVE and Properties commands you lot tin quickly create unproblematic 3D drawings.

Using this tutorial you will learn how to requite objects a thickness, how to movement them vertically, how to view your 3D creations and how to utilise the 3DFACE and SHADE commands.

The DDVPOINT Command

You tin can apply this command to get an axonometric view of your drawing.

There are a number of ways to get an axonometric view of your AutoCAD drawing only the DDVPOINT command is probably the easiest and quickest to apply. It is, even so, buried two layers deep in the pull-downwardly menu and so information technology'due south frequently quicker simply to type it at the keyboard, since there is no toolbar button. As you probably recognise from the control name it is a dialogue box driven command. The Viewpoint Presets dialogue box is illustrated on the right. As you lot can encounter, you define a view by specifying two angles. The get-go angle is the rotation from the 10 axis (the horizontal angle). The second is the angle from the XY plane (the vertical bending). Using the dialogue box you can specify an angle either by picking on the 2 dials or by entering an angle into each of the two angle edit boxes. Y'all can even expect at your drawing from underneath by specifying a negative vertical angle. For most purposes a horizontal angle along i of the diagonals, 45, 135, 225 and 315 and a vertical angle of xxx give the all-time results.

You tin can return to a programme view of your drawing by using the PLAN control. To do this, just enter "Plan" at the control prompt and so to accept the "Current UCS" default. You tin as well return to any previous view by using the Zoom Previous control option, Z P at the keyboard or from the Standard toolbar.

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The Properties Command

You can apply the DDCHPROP command to change the colour, layer, linetype, linetype scale and thickness of whatsoever single or multiple object selection. The DDMODIFY command gives all of these change options in addition to those which are specific to the object type. DDMODIFY is always used by AutoCAD as a default for unmarried object selections when the Backdrop control is selected from the toolbar or from the pull-down bill of fare.

Command Sequence

Command: DDCHPROP
Select objects: (option one or more objects)
Select objects:
When you have selected the objects, the Alter Properties dialogue box appears. To alter the thickness, simply enter a value (in drawing units) in the Thickness edit box. When you click the "OK" button your objects will be extruded by the amount specified.

The analogy (correct) shows the result of applying a thickness to a circle. A circumvolve with no thickness is shown on the left and a circle with thickness on the right.

Finer a circumvolve with thickness becomes a cylinder. You can tell by the orientation of the UCS icon in this illustration that this is an axonometric view (see "The DDVPOINT Command" above for details).

Moving in the Z Direction

By now you should be quite used to using the Motility control but up until now you've merely been moving 2D objects in the XY Plane. Move tin just as easily be used to move a drawing object vertically, perpendicular to the XY Plane. Yous tin can practise this by using XY and Z co-ordinates or by picking points in 3D space.

In the illustration on the left a circle has been moved from the base plane of a cube to the pinnacle face of a cube. This is washed past using the Motility control ( from the pull-downwards or from the Modify toolbar). Simply starting time the Movement control, select the circumvolve, selection one of the lower corners of the cube as the base signal (use the end point Osnap!) and so selection the respective top corner as the second bespeak, over again using the end point Osnap. If y'all await at the circle in plan there appears to be no difference in it'south position considering it has non been moved in the XY plane but perpendicular to information technology. Y'all tin apply the same principle to movement whatsoever drawing entity. Bear in mind that yous must ever employ an Osnap when you are picking points in 3D space. If you practice non, the picked point volition always be on the base plane, which doesn't brand any sense. One of the bug with this is that yous may not realise your fault until you alter your view position considering in the electric current view the objects will appear to have been moved usually. It's a expert idea to keep switching your view indicate every bit a check.

In the to a higher place example the move was fairly easy because we had a cube to utilize equally a guide. Very oft you volition need to motility an object vertically without any guide. In such a example you should utilise co-ordinates. For instance, if the cube in the illustration above was forty cartoon units high so I could move the circle using the following command sequence.

Command Sequence

Command: Move
Select objects: (select the circle)
Select objects:
Base point or displacement: 0,0,0
Second point of deportation: 0,0,40

Observe that I use the UCS origin betoken as a base signal, that'south because it'due south standard exercise only in principle it could be any point in space. The virtually important affair is that the Ten and Y co-ordinates remain the same (because we do not want to move in the XY Plane) and the Z co-ordinate must increment by the altitude yous want to move upward. Using co-ordinate 25,43,xvi as the base point and 25,43,56 equally the 2nd signal would have resulted in exactly the same move. To move downwards you merely need to specify a negative Z co-ordinate. For example to move the circle down by 40 units the 2d betoken co-ordinate would be 0,0,-40.

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The 3D Face up Command

The 3D Confront control is used to draw 3D surfaces with iii or 4 edges.

Command Sequence

Command: 3DFACE
First Indicate: (selection point)
Second Betoken: (selection signal)
3rd Point: (pick point)
Fourth Point: (pick betoken or for only iii edges)
Third Point: (starting time another 3D Face up or to end)

Why do I demand a 3D Face?

The reason is that when you give an entity similar a rectangle a thickness information technology is given solid sides in the direction of the extrusion but it is left open up concluded like a tube. To add a top and a lesser to a box you must utilize 3D Faces. In the illustration on the right, two boxes have been shaded using the Shade command, SHADE from the keyboard, from the pull-down or from the Render toolbar. See SHADE for a clarification of the Shade command options. The box on the correct is a rectangle which has been given a thickness. As you can encounter, information technology does not have a top. A 3D Confront has been added to the meridian of the box on the left which gives the effect of a solid surface when shaded.

When you use the Shade command, don't forget to utilise the Regen command to get back to the wireline drawing. AutoCAD does not let you to option points on a shaded cartoon.

For complicated shapes yous may need to use a number of 3D Faces to fill up a surface. Fortunately, extruded circles are automatically given a solid top and bottom and then you don't need any 3D Faces. If you lot do need to use a complex of faces to fill a surface there is a way to hibernate the join lines betwixt faces. If you type "I" and before the first pick point of any border, that edge will be made invisible. If you are careful you can easily fill a complicated surface with many 3D Faces which will simply appear every bit a single continuous surface. If you need to create a very circuitous surface it may exist better to use the EXTRUDE command which creates solid extrusions i.due east. they already have peak and bottom surfaces.

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An Practise

The practice beneath is designed and then that you can practice all of the new commands and techniques outlined above. Information technology is a simple tabular array which is composed of 9 main elements, four legs, four rails, and a tiptop. These elements are all synthetic using the Rectangle command, RECTANG from the keyboard or from the pull-down menu. Remember, there is nil special well-nigh rectangles, they are but four sided closed polylines, and then if you adopt using the PLINE command, then feel free.

These rectangles volition be given a thickness using the Properties command and an elevation using the Motility command. Some 3D Faces are used for the finishing touches using the 3DFACE command.

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Drawing the Table

Step ane

Outset of all draw the table plan using the dimensions on the illustration and inset detail below. All dimensions are in millimetres. The plan is composed of nine rectangles. You may need to employ other commands like Line and Offset to construct the rectangles. Alternatively you can work out the rectangle co-ordinates and construct them manually. Remember to use the Re-create and/or Mirror commands to duplicate identical objects. For example, it'southward really only necessary to draw one leg since they are nonetheless.

Stride ii

Next, using the Properties command, select the four table legs and give them a thickness of 700. Using the Properties command a 2nd time, select the iv table rails and give them a thickness of 100. Move the rails vertically through 600 with the Motility control using a according value of 0,0,0 for the base indicate and 0,0,600 for the second point. Finally utilize the Backdrop control a third fourth dimension to give the table top a thickness of 40 and use Motion again to give the summit an elevation of 700. At present expect at what you have created using the DDVPOINT command, from the pull-down or DDVPOINT at the keyboard. Use the SHADE control to meet the solid effect, from the pull-downward or SHADE at the keyboard.

Step 3

Every bit yous will have noticed, your table does not yet have a solid summit. Yous can achieve this using 3D Face. You can beginning the 3D Face command from the pull-down, , from the Return toolbar, or from the keyboard, 3DFACE. 3D Faces are divers by picking the four points of a rectangle in either a clockwise or anticlockwise management. Kickoff the 3D Face command and using the endpoint Osnap, select the 4 upper corners of the tabular array top. Use the Shade command once more to meet the result. You lot can use more 3D Faces to complete the model. By looking at the table from various angles you will notice that the underside of the rails, the underside of the legs and the underside of the tabular array top all need 3D Faces in society to create a completely solid model.

Now that you have completed your model, experiment with the Shade command and the various shade edge settings (see "Tips and Tricks" below).

Step four

To stop your drawing, gear up tilemode to 0, create an A3 cartoon canvas and insert some tiled viewports, encounter thePaper Infinite practise for details. Your cartoon should stop up looking something like the one below. The vase was created using the REVSURF command, run across REVSURF for details.

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3D Objects

In improver to the uncomplicated 3D objects you tin can create by giving objects thickness and adding 3D Faces, AutoCAD provides a number of ready made 3D objects. These objects can be chosen from the 3D Objects dialogue box. As you tin see from the illustration of the dialogue box beneath, you tin create very elementary objects like a box and circuitous ones similar the torus.

You must invoke the 3D objects dialogue box from the pull-down menu, as there is no keyboard equivalent. Alternatively yous can select individual 3D Object commands from the Surfaces toolbar. Each 3D Object requires different input from the user but the command line is quite explicit and then y'all shouldn't accept whatsoever problems.

I of the virtually useful objects is the Sphere. In the illustration on the right a 3D tree has been created using a circle with thickness equally the torso and a sphere as the awning. One affair to behave in mind when creating spheres is that the middle of the sphere will exist on the ground aeroplane. Therefore, half of the sphere is below ground level and half above. If you want the sphere to sit on the ground plane, all yous have to do is motion information technology upward through a distance which is the same equally it's radius.

Another consideration when creating spheres and some of the other shapes is the number of segments to use. It is very tempting to employ a lot and create a smooth shape but this does take lots of drawing retentivity and so go carefully. The default value (16) is usually adequate for most purposes.

Command Sequence

Invoke the dialogue box from the pull-downwardly (), choice the sphere icon and then the "OK" button or choice from the Surfaces toolbar.

Eye of sphere: (pick signal)
Diameter/<radius>: (pick indicate or enter value)
Number of longitudinal segments<xvi>: (enter number or)
Number of latitudinal segments<16>: (enter number or)
Your Sphere is drawn.

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Tips & Tricks

• If you would like to endeavor creating the vase as shown in the table drawing. Yous will need to know a niggling bit almost UCS, User According Systems (encounter UCS) and how the Revolved Surface command works (see the 3D Tree do for details).
• Yous can modify the shaded upshot that the Shade command gives to your cartoon using the SHADEDGE variable. To change the shade edge variable but enter SHADEDGE at the keyboard and enter a value between 0 and 3.
  SHADEDGE = 0 gives a shaded color surface with no lines.
  SHADEDGE = 1 gives a shaded colour surface with lines. This tends to give the best overall results.
  SHADEDGE = ii gives a groundwork colour surface which gives a similar upshot to the Hide control.
  SHADEDGE = 3 gives a block color surface, this is the AutoCAD default. See SHADE for a fuller description of the SHADEDGE variable.
• Always utilise Osnaps when picking in 3D.
• Use the Shade command regularly to keep runway of your drawing. In wireline it'due south impossible to tell if a surface has a 3D Confront or not, so y'all'll need to employ Shade to check.
• You can strength invisible 3D Face up edges to brandish in wireline using the SPLFRAME variable. If SPLFRAME = 0 all invisible edges remain hidden. If it is gear up to 1 invisible edges will be displayed. This can exist extremely useful because information technology is impossible to select a 3D Face which has no visible edges. The only style to select such a 3D Face is to set SPLFRAME to one kickoff.

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