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Observe that the UCS icon has changed to relect the new orientation see Figure 2. The house is reoriented with respect to the current UCS see Figure 2. The new line has a dif- ferent orientation with respect to the original line you drew in step 1 see Figure 2. To restore the current coordinate system to its original state, called the world coordinate system WCS , type UCS and press Enter twice.

The plan is oriented to the WCS as it was initially. Both lines were drawn at a degree angle but in different coordinate systems. Observe that north is up again in the ViewCube. Draw Circles, Arcs, and Polygons Arcs are sections of circles. Polygons are regular igures made of straight seg- ments such as a triangle, square, pentagon, or hexagon. A polygon with a large number of segments may look like a circle but is fundamentally different.

There are many options for creating circles, arcs, and polygons. AutoCAD pro- vides these options to make it easier to create accurate shapes based on all the types of geometric situations that typically arise in drawings. Zoom into the stove in the kitchen. Two of the burner circles are missing, and you will draw them. On the Home tab, take a look at the Layer drop-down menu in the Layers panel, and observe that Furniture is the current layer because you see its name without having to open the drop-down.

Open the Layer drop-down menu, and select Equipment as the current layer see Figure 2. You will use preexisting points as guides in drawing the burners. Expand the Utilities panel on the Home on whichever layer is tab and select Point Style. In the Point Style dialog box, select the X current. Think of layers icon and click OK see Figure 2. Click the Circle tool on the Draw panel. Before you click a center Objective point, hold down Shift and right-click to open the Object Snap con- text menu.

Select Node from the context menu Figure 2. Always use object snaps to connect objects precisely. Right-click to repeat the last command. Never type m, [3P 2P Ttr tan tan radius ]: cm, or mm to repre- sent metric units. Object snaps listed in Select Node, and then click point B shown in Figure 2. Hold Shift again, right-click, and choose Node. Click point C shown be selected each time they are used.

You will in Figure 2. Click the arrow under the Circle tool in the Draw panel, and select running object snaps in Chapter 3. Click the circle you drew in the previous step.

Hold Shift, right-click again, and type G. Notice that this letter is underlined in the word Tangent in the context menu refer to Figure 2. Click the circle on the bottom left. You can type the irst three letters of any object snap as an alternative to using the context menu. AutoCAD draws a circle precisely tangent to the three others see Figure 2.

Erase all three point objects and the last circle you drew to leave the four burners of the stove. In the next set of steps, you will use one such arc option to draw a door swing. Pan and Zoom into the bathroom by dragging and rotating the mouse wheel. Select Doors from the Layer drop-down menu in the Layers panel.

Certification 3. Select Center, Start, End. This is the sequence in which information must be entered. Hold Shift and right-click. Select Endpoint from the context menu, and click the start point B shown in Figure 2. The arc appears, and the command is completed. You can draw these shapes inside or outside a circle, or specify the edge length, as shown in the following steps. Make the Furniture layer current by selecting it from the Layer drop-down menu in the Layers panel.

Zoom into the living room. Type 4, and press Enter to draw a square. Press Enter to repeat the last command, type 6, and press Enter to draw a hexagon. Click a point in the living room where you want to center the hexagon.

Press Enter to accept the default Inscribed In Circle option. Fillet cre- ates arcs and Chamfer creates lines. Use Fillet and Chamfer 37 2. Press the down-arrow key three more times, and press Enter to select the Distance option in the Dynamic Input display see Figure 2. FIGuRE 2. Click the second line to perform the chamfer and complete the command. The cham- fer is shown in the middle of Figure 2. This option should be selected by default. Click the irst line, and then position the cursor over the second line; the illet preview shows on screen.

Click the second line to commit to that particular radius. A illet is shown at the right of Figure 2. In the case of crossing lines, you must select the lines on the portions that you want to keep, as shown in these steps. Type F, and press Enter. Press the down-arrow key to access the Dynamic Input display, and select Radius. Type 0, and press Enter. Now Fillet will not create an arc at all. Click the points A and B, as shown in Figure 2.

The lines are joined at their endpoints, and the remaining portions of the lines beyond their intersection point are trimmed away. You have filleted and chamfered sets of lines, used absolute and relative coordinate systems, and created objects using specific measurements. In addition, you know how to cancel, erase, and undo and how to correct your mistakes. Drawing aids are essential modes and methods of entering data that, once mastered, allow you to create measured drawings with ease.

I highly recommend learning all of the drawing aids, because they will make you a more productive draftsper- son. Most drawing aids can be toggled on or off from the application status bar. Additional settings and dialog boxes are accessible by right-clicking the individual status-bar toggles.

Snap constrains your ability to draw objects so that they automatically start and end precisely at grid intersections. Grid and Snap are most help- ful when used together so that you can draw objects that snap to the grid. Figure 3. Choose the acad. Open the Customization menu on the extreme right of the status bar and select Units and LineWeight.

Click in the drawing window to close the Customization menu. Change Units to Architectural if you are using Imperial units; leave Decimal selected if you are using metric units. Click OK. Right-click ally equal to or an to end the LINE command.

Open the Default drop-down list, Zoom or pan as neces- sary as you are working select 0. Type L, and press Enter twice to continue drawing from the last with layers in point. Toggle Grid off in the status bar.

Commands that operate while another command is running are called transparent commands. Typing an apostrophe before a command forces it to be run transparently. For example, while drawing a line type 'Z and press Enter. Polar Tracking is more lexible than Ortho mode, with the ability to constrain lines to increments of a set angle. Begin by opening the ile Ex Type L, position the cursor over the right endpoint of the horizontal line, and click to establish the irst point of a new line.

Toggle off Snap mode by pressing the F9 key. Toggle on Ortho mode by clicking the Ortho toggle in the status bar or by pressing the F8 key. Ortho mode constrains the line vertically and typing in an explicit value obviates the need for Snap.

Toggle off Ortho mode by clicking its status bar button. Toggle on Certification Objective Polar Tracking by clicking the adjacent button on the right.

The dash is a necessary 6. Move the cursor around, and observe that green dashed lines appear separator between in eight locations around a circle in 45 increments. Move the cursor whole and fractional inches. Ortho and Polar Tracking save you from having to type in angles or coordinate values explicitly, or to even think about coordinate systems.

Instead of being tied to a spatial grid as with Snap , PolarSnap is based on relative polar coordinates. Exercise 3. Toggle on Snap by clicking its icon on the status bar. Right-click the same button, and choose Snap Settings from the context menu.

Certification 2. Use polarSnap 47 3. Right-click to end the LINE command. Press the spacebar to repeat the LINE command. Type 0,0 or , for metric and press Enter to input the irst endpoint of the new line. Toggle off Snap mode by clicking its icon on the status bar, thus dis- abling PolarSnap. Move the cursor horizontally to the right until it overshoots the last line drawn in step 5.

Click to draw the line without worrying about its length see Figure 3. Right-click to complete the command. Type F for Fillet , and press Enter. Verify that Radius is set to 0 in the Command window, and then click the vertical and horizontal lines on the portions of the lines that you want to keep marked A and B in Figure 3.

Select Running object Snaps The lines you have drawn thus far are all precisely connected because they were chained together as they were drawn or their coordinates were known. Aside from these special circumstances, lines must be connected using object snaps to ensure accuracy. Begin by open- ing the ile Ex Press Z and then Enter. Click two points to deine a tightly cropped zoom window around point A. Zoom in again if necessary until you can see that the endpoint of the line you just drew is not on the hori- zontal line see Figure 3.

No matter how carefully you clicked point A in the previous step, the line you drew will not be on the edge it will either fall short of it or overshoot it. Click Zoom Previous again if necessary to return to the original view. Click the line drawn in step 3, and press the Delete key. Toggle on Object Snap on the status bar. Right-click the same Certification Objective icon, and choose Object Snap Settings from the context menu. Toggle off Polar Tracking on the status bar.

Move the cursor close to point A in Figure 3. When it does, click to snap You can toggle on one the irst point of your line precisely to this point.

Move the cursor down to point B, and wait until the green perpendic- the actual geometric ular marker appears. When it does, click the drawing canvas to select perpendicular; as long the second point of the line. This line as the perpendicular is connected precisely at both ends because Object Snap was used. Zoom into point A or B in Figure 3. Click Zoom Extents in the Navigation bar to exactly. Hold down Shift, right-click to open the Object Snap context menu, and choose Nearest.

Object snaps invoked from the context menu override any running object snaps. Click point A, shown in Figure 3. Nearest ensures that the new line is attached somewhere along the edge of the horizontal line.

Move the cursor close to point B, as shown in Figure 3. Choosing None in the Snap context menu Harness the From Snap overrides any running snaps with no snap. Rather than snapping to an existing geometrical feature such as an endpoint, midpoint, intersection, and so on , how do you snap a set distance and direction from one? Answer: Use the From snap, as shown in the following exercise. Type L and press Enter. Hold Shift and right-click to open the Object Snap context menu.

Select From in the context menu. Click point A shown in Figure 3. This is the point from which you will specify a displacement. Move the cursor to point B, and wait for the running perpendicular snap marker to appear.

When it does, click to specify the second point of the line. Select the line you just drew, and press the Delete key. Apply object Snap tracking Object snap tracking is for situations where you want to snap to a point that has a geometric relationship with two or more snap points. Toggle on Object Snap Tracking by clicking its icon on the status bar. Certification Objective Verify that Ortho mode is on.

Move the cursor over point A in Figure 3. When the running mid- point snap marker appears, move the cursor horizontally to the right to establish the irst tracking line.

Do not click yet. Move the cursor over point B in Figure 3. Move the cursor down vertically to estab- lish the second tracking line. Again, do not click yet. Move the cursor down until both tracking lines intersect. When they do, click point C to set the center point of the circle. Click the Rectangle tool on the Draw panel. Move the cursor over the endpoint marked A in Figure 3. Move the cursor to point B in Figure 3. Move the cursor horizontally back to the intersection with the irst tracking line, and click to establish the irst corner of the rectangle point C.

The rectangle and drawing is complete see Figure 3. Most of your time will be spent editing entities. In complex drawings you have to plan how you will select only those entities you want to edit while leaving all other entities unaffected.

You will learn a number of techniques for adding and removing entities from the selection set, which is the collection of entities your chosen editing command acts upon. To edit objects, you must irst select them.

In complex drawings, selecting would be tedious if you had to click one object at a time. In the following exercise, you will learn several eficient selection methods that you can use at any Select objects: prompt, which appears in every editing command. Zoom into Stair A in the building core. The prompt in the Command window reads as follows: ERASE Select objects: This is the same way almost every command begins—with the opportunity to create a selection set. Click point A and then B, as shown in Figure 4.

Observe that a trans- Objective parent implied window appears between these points. The objects that are selected are only those completely contained within the borders of the blue window. This particular selection includes the stair arrows, handrails, and three lines representing stair treads near the break lines.

Create Selection Sets 59 A You can draw implied windows either by clicking two opposite corner points, or by clicking the first corner point and then drag- B ging to the opposite corner and releasing F I G u R E 4. Type R for Remove , and press Enter. When you click Certification Objective the irst point on the right A and move the cursor to the left at B , a transparent green crossing window appears between the points. Whatever the green window crosses is selected.

The crossing selec- tion removes the handrail and two of the stair treads because the selection was made at the Remove objects: prompt.

Click point A and then point B, as shown in Figure 4. This implied window selects the short line segment trapped in the break line and removes it from the selection set. Type A for Add , and press Enter. Click both of the break lines to add them to the selection set. All of Objective the break line segments are selected in two clicks because the break lines are polylines.

Hold Shift, and click the break lines again. They are removed from the selection set without being at the Remove objects: prompt. Exercise 4. Additional dynamic input prompts are available on screen when you select objects irst. Create Selection Sets 61 Begin by opening the ile Ex Click point A, as shown in Figure 4.

Press the down-arrow key to expand the dynamic input menu on screen. Select WPolygon. Click points B through H, as shown in Figure 4. Only those objects completely polygonal crossing contained within the borders of the blue window will be selected. Press Enter to make the selection. Square blue dots appear on the selected objects—these are called grips, and you will learn to use them later in this chapter. Press Esc to deselect. Toggle on Ortho mode in the status bar.

Without being concerned with measurements or accuracy, draw a line under the word Stair, a circle around the letter A, and a rectangle around the entire section, in that order see Figure 4. Select the circle and the line and press Enter. The grips for the circle and line appear; press Esc to deselect.

Click the Erase icon on the Modify panel. At the Select objects: prompt, type P for Previous and press Enter. The circle and line are selected because they comprise the set of objects that was selected previously.

Press Enter again to delete these objects. Type L for Last , and press Enter. The rectangle is selected because it was the You can select the entire draw- last object you created. There can only be one last object. Press Enter ing by typing all again to delete the rectangle. Click the dot at the end of the stair direction line shown in Figure 4. This dot is at the conluence of the horizontal stair direction line and the vertical tread line. When Selection Cycling is on, you are presented with the Selection dialog box whenever your selection is ambiguous.

Hover the cursor over the items in the list and each one is highlighted in blue on the drawing canvas. Select the line in the list that highlights the stair direction line as shown in Figure 4. Create Selection Sets 63 Click this dot. Select one of the vertical tread lines in Stair A by clicking on it. Right-click, and choose Select Similar from the context menu that appears.

All lines on the same layer are selected; you might have to zoom out to see both stairs see Figure 4. Other object types on the same layer remain unselected because they were not similar enough.

Press Esc. Here you can choose criteria to determine which object properties must match in order to be selected by this useful com- mand: Color, Layer, Linetype, Linetype Scale, Lineweight, Plot Style, Object Style, or Name.

Pan to the upper-right quadrant of the building, and zoom into the furniture grouping that needs to be illed in. Click the chair that is not in front of a desk to select it. Position the cursor over the selected chair, but not over its grip. Drag the chair while holding down the left mouse button to move it closer to the upper desk, as shown in Figure 4.

To position the chair more precisely, click the Move tool in the Modify panel. Select the chair you just moved in the previous step and press Enter. Right-click the Object Snap toggle in the status bar, and choose Midpoint Certification Objective from the context menu if it is not already selected. Click the base point at the midpoint of the front of the chair point A in Figure 4. Click the second point B in Figure 4. The chair is moved precisely to the midpoint of the desk edge. Press the spacebar to repeat MOVE.

Type P, and press Enter twice to Certification Objective select the same chair again. Type D, and press Enter once more to choose the Displacement option.

In Displacement mode, the irst point is the origin point. Any coordinates you enter are relative to the origin, so typing the symbol is unnecessary. Click the Copy tool in the Modify panel. Select the chair you just moved and press Enter twice. Select the midpoint of the desk point B in Figure 4.

Press the spacebar to repeat the previous command, select both desks Certification Objective and chairs with crossing windows but not the low partition between them , and press Enter. Select point A in Figure 4. Type A and press Enter. Select the Attach tool. Browse to the folder where the exercises are stored.

Change the Files of type to All image files. Select the floorplan1 file. Press Open. Uncheck the insertion point to insert the image at 0, 0, 0. Set the Scale to Set the Angle to 0.

To prevent your image from moving around: Create a new layer called image. Select the image. Right click and select Properties. Assign the image to the image layer. Lock the image layer. Open the Design Tools palette. Launch All Palettes.

Select the Walls palette. Locate the Stud Draw a wall on the far left side of the floor plan, tracing over the wall shown in the image file. Orient the wall so the exterior side of the wall is on the outside of the building.

Flip the wall orientation so the wall exterior is on the outside of the building. Check the offset distance to ensure the two walls are 15 apart from inside finish face to inside finish face. Trace a horizontal wall using the Stud Right click and select Apply Tool Properties to Wall. Select the upper horizontal wall. The wall style will update.

Place a Stud-4 Rigid 1. Verify that the orientation is for the exterior side of the wall outside the building. Repeat for the other side. Select the lower horizontal wall. Use an offset of 2 10 to create the closet space. Adjust the position of the walls as needed to ensure they match the floor plan image. Select the Stud On the Properties palette, set the Justify option to Center. Trace the remaining south walls of the floor plan. Use the flip arrows to orient the exterior side of the walls to the outside of the building.

Offset the south garage wall. Select the north garage wall. In the Properties palette: Change the wall style to Stud Verify that the distance from interior face to interior face is. Offset the north utility wall Assign the top wall to the Stud-4 Rigid 1. Place the west family room wall. Verify that the distance from interior face to interior face is Trace over the floor plan to place the walls for the covered porch.

Draw a line at a 45 angle to designate the wall for the kitchen. Right click and Apply Tool Properties to Linework and select the angled line.

The walls indicated should be broken using the BREAK tool so one segment can remain exterior and one segment can be changed to the interior wall style. Change the interior wall segments to the interior wall style. A triangle symbol with an exclamation point indicates that you have a wall interference condition usually a wall on top of a wall. Select the interior wall with the interference condition.

Select the two exterior walls where it is interfering. The walls will merge and clean up the intersection area. Zoom into the area near the utility room and notice some of the walls may need to be cleaned up as well. Select one of the interior walls.

Select both walls. The wall intersection cleans up. Repeat for the south utility wall. Zoom into the Bedroom 2 area. Select the walls at the locations indicated to clean up the room. Offset the south bathroom wall Verify that the distance from interior face to interior face is Add the interior walls for the lavatory areas. Freeze the image layer to turn off visibility of the image. You should have a completed floor plan. Open ex Thaw the image layer so you can see where doors are located.

Locate the Bifold-Double door on the Doors tab on the Tools palette. This palette was created in Lesson. Highlight the Bifold - Double door. Expand the Dimensions section. Set the size to: x Set the Opening percent to If you left click in the Standard sizes field, a down arrow will appear select the down arrow and you will get a list of standard sizes. Then, select the size you want. The value of the Opening percentage determines the angle of the arc swing. Expand the Location section.

Place the Bifold - Double doors at the two closets. The orientation of the door swing is determined by the wall side selected. This will allow the user to snap to the center position along the wall.

Press OK to close the Properties dialog. In both cases, you want to select the outside face of the wall. Center the closet door on each wall. Place the Bifold - Double door at each of the closets located in Bedroom 2 and Bedroom Place the Bifold - Double door at the closet next to the entry way. The exclamation mark indicates that the door is too wide for the wall. Select the door. In the Properties palette: Change the width of the Bifold - Double door to 4 0.

The door updates and the warning symbol disappears. The door now fits. In the Properties palette: Set the door to use the Standard Size 2 4 x 6 8. Press OK to close the Properties palette. Place the door in the Linen Closet near the lavatories. In the Properties palette: Set the door to use the size 3 0 x 6 8. Set the Swing angle to Select the side of the wall that will be used for the door swing and place the entry door. In the Properties palette: Set the door to use the size: 2 6 x 6 8.

Place the door in Bedroom. Place the door in Bedroom 3. The swing is on the correct side, but not the correct direction. Select the door so it highlights. The horizontal arrow flips the orientation of the door to the other side of the wall. The vertical arrow flips the orientation of the door swing.

Left click on the vertical arrow. The door updates to match the floor plan image. In the Properties palette: Set the door to use the Standard Size 2 6 x 6 8. See all 3 pre-owned listings. Buy It Now. Add to cart. Sold by zuber About this product Product Identifiers Publisher.

Additional Product Features Target Audience. Show More Show Less. Condition: Pre-owned Pre-owned. Ratings and Reviews Learn more. There can only be one last object. Press Enter ing by typing all again to delete the rectangle. Click the dot at the end of the stair direction line shown in Figure 4.

This dot is at the conluence of the horizontal stair direction line and the vertical tread line. When Selection Cycling is on, you are presented with the Selection dialog box whenever your selection is ambiguous. Hover the cursor over the items in the list and each one is highlighted in blue on the drawing canvas. Select the line in the list that highlights the stair direction line as shown in Figure 4. Create Selection Sets 63 Click this dot.

Select one of the vertical tread lines in Stair A by clicking on it. Right-click, and choose Select Similar from the context menu that appears. All lines on the same layer are selected; you might have to zoom out to see both stairs see Figure 4. Other object types on the same layer remain unselected because they were not similar enough. Press Esc. Here you can choose criteria to determine which object properties must match in order to be selected by this useful com- mand: Color, Layer, Linetype, Linetype Scale, Lineweight, Plot Style, Object Style, or Name.

Pan to the upper-right quadrant of the building, and zoom into the furniture grouping that needs to be illed in. Click the chair that is not in front of a desk to select it. Position the cursor over the selected chair, but not over its grip.

Drag the chair while holding down the left mouse button to move it closer to the upper desk, as shown in Figure 4. To position the chair more precisely, click the Move tool in the Modify panel. Select the chair you just moved in the previous step and press Enter. Right-click the Object Snap toggle in the status bar, and choose Midpoint Certification Objective from the context menu if it is not already selected.

Click the base point at the midpoint of the front of the chair point A in Figure 4. Click the second point B in Figure 4. The chair is moved precisely to the midpoint of the desk edge.

Press the spacebar to repeat MOVE. Type P, and press Enter twice to Certification Objective select the same chair again. Type D, and press Enter once more to choose the Displacement option. In Displacement mode, the irst point is the origin point. Any coordinates you enter are relative to the origin, so typing the symbol is unnecessary.

Click the Copy tool in the Modify panel. Select the chair you just moved and press Enter twice. Select the midpoint of the desk point B in Figure 4. Press the spacebar to repeat the previous command, select both desks Certification Objective and chairs with crossing windows but not the low partition between them , and press Enter.

Select point A in Figure 4. Type A and press Enter. Type 3, press Enter, and then click point B in Figure 4. Pan over to the Conference room. Select the Object option by clicking Object on the command prompt. You must include the Select the inner left wall line and watch as the crosshair cursor original object in the count of items.

Toggle on Ortho on the status bar if it is not already on. Type CO for Copy , and press Enter. Select the chair that is against the left wall of the Conference room and press Enter.

Click an arbitrary base point by clicking in the empty space of the Conference room. Move the cursor down along the direction of the wall and click the Array option. The command prompt reads as follows: Enter number of items to array: Type 5, and press Enter.

Move the cursor downward, and observe that ive ghosted chairs appear. When the spacing looks right see Figure 4. The crosshair cursor returns to its default orientation. Numerically speaking, you typically rotate by degrees or scale by percentages about base points. On the other hand, you can avoid using numbers entirely by choosing the Reference options, which let you rotate or scale selection sets in relation to other objects. Navigate to Reception at the bottom of the loor plan.

Click the Rotate button in the Modify panel, select the upper lounge chair, and press Enter. Toggle off Ortho and Polar Tracking if it is on in the status bar. Move the cursor around the point, and observe that a rubber-band line connects the base point to your cursor and a ghosted image of the chair is superimposed over the original chair representation. Move the cursor until the rubber band aligns more or less perpen- dicularly to the wall behind the chair see Figure 4.

Click the chair that you just rotated to select it without issuing an explicit command. Hold the Ctrl key, and repeatedly press the arrow keys to nudge the selected object a few pixels at a time. Nudge the chair so that it is a similar distance from the wall and the round table as compared to the other armchair in Reception. Press Esc to deselect all. Zoom out and focus on the upper-left quadrant of the building.

Select the furniture group shown in Figure 4. Select midpoint A as the base point, and select midpoint B as the second point. Type RO for Rotate , and press Enter. Type L for Last and press Enter twice. Select the same midpoint where the furniture group was attached to the midpoint of the shell window wall as the base point of the rotation. Instead of specifying the reference angle with a number, you will determine the angle interac- tively. Type and press Enter to input the base point of the rotation as the base point of the reference angle.

Click endpoint A as shown in Figure 4. The furniture group rotates so that it is parallel and cen- tered on the window wall. Pan over to the upper-right quadrant of the building, and zoom in on the oversized round table.

Click outside the menu to close it and then ence to other objects without having to snap to the center of the circle by hovering over the circle and then input numerical angles moving the cursor to its center and clicking.

Enter to scale the circle down to 50 percent of its original size see Figure 4. Toggle on Ortho on the status bar, and move the chairs closer to the table, both horizontally and vertically. You will learn how to create two types of associative arrays: rectangular and polar. Type OB for Object , and press Enter. Select the left side of the bottom-left edge of the table in the Small Conference room.

Click the Rectangular Array tool on the Modify panel. Select both chairs on the sides of the conference table and press Enter. Change Columns to 1 and Rows to 5 on the temporary Array Creation tab that appears on the ribbon. Select the Associative toggle in the Properties panel if it is not already blue. Click Close Array on the ribbon. Select one of the new chairs, and observe that all the arrayed chairs side of the line you are selected as a unit.

Click Close Array. Type UCS, and press Enter twice to return to the world coordinate system. Type AR for Array , and press Enter. Type PO for Polar , and press Enter. Hold down Shift, and right-click to open the Object Snap context menu. Work with Ar r ays 73 5. Type 12 in the Items text box on the ribbon and press Tab. The table is a bit too large. Click the circle to select the table. Press Enter and then Esc. Click any one of the chairs to select the polar array.

Hover the cursor over the base point grip, and choose Stretch Radius see Figure 4. The chairs more closely wrap around the smaller table.

Instead, these com- mands are used for arraying points. You can invoke the opposite Objective command while running either by holding down Shift. Click the Extend tool on the Modify panel it is nested under Trim. Select the inner line of the bottom core wall and press Enter.

Create a crossing window by clicking points A and B, as shown in This line will be the Figure 4. Four tread lines are extended. Click each remaining boundary edge that tread line, one at a time, to extend all the stair treads to the core wall. Type TR for Trim , and press Enter. Select the upper and lower hand- rail lines to act as cutting edges and press Enter.

Make a narrow crossing window in the center of the handrail to trim away all the treads that pass through the handrails, and press Enter. Type EX for Extend , and press Enter.

Click each of the ive missing tread lines to extend them into the bottom light and press Esc to end the command.

Hold Shift and click each one of the treads passing through the handrail. Press Esc when you have removed all ive line segments see Figure 4. Type , and press Enter. Click the line segment on the right side of the incomplete copy machine to lengthen it toward the right. Type S for Stretch , and press Enter. Click points A and B as shown in Figure 4. Toggle on Ortho if it is not already on. Click a base point off to the right side of the door opening, well away from the geometry so that you do not inadvertently snap to anything.

The wall, door, and swing end up more or less centered on the wall. MIRROR cre- ates a reversed object at a distance from the original object as determined by the position of a drawn relection line.

Click the Offset tool in the Modify panel. Select the elliptical arc at the bottom edge of the Copy Room. The command line asks you to specify a point to determine on which side of the selection to offset the new object. In this case, click any- where above the elliptical arc, and a new ellipse is created such that its curvature matches the original but is spaced a set distance away. Press Esc to exit the command. Type F for Fillet , press Enter, and click the new elliptical arc and the inner line of the adjacent vertical wall on the right.

Press the space- bar to repeat the FILLET command, and click the elliptical arc and inner line of the adjacent vertical wall on the left. The intersections between the wall objects are cleaned up see Figure 4. Zoom into the furniture system that is missing two desks in the upper-right quadrant of the building.

Click the Mirror tool in the Modify panel. Make crossing and individual line selections to select the desks and chairs shown in Figure 4. Double-click the mouse wheel to zoom to the drawing extents. Select the furniture system indicated in Figure 4. For the irst point of the mirror line, type 0,0 and press Enter. Select this group. Press Enter to complete the The origin point is at command, and decline to erase the source object by pressing Enter the geometric center of again.

Edit with Grips All objects have grips, the square blue symbols that appear in AutoCAD at sig- Certification Objective niicant points when objects are selected without issuing any command.

Select the inner line of the window wall directly below the sofas, right-click, and choose Properties from the context menu. Click both sofas and the coffee table in between them to select all three. Click the grip in the center of the coffee table to activate it and turn it red. Press the spacebar again. Type 'CAL to invoke the command-line calculator transparently. Exercise 5.

Figure 5. Click the Polyline tool on the Draw panel of the ribbon. Click the irst Objective point at point A, shown in Figure 5. Type A for Arc , and press Enter. Normally, polyline arcs 2. Toggle off Ortho and Polar Tracking modes if they are on. Observe are defined by two that the arc you are drawing by default opposes the natural curvature points, and by using the of the lake see Figure 5. Type S for Second Point and press Enter.

Click point B shown in Figure 5. By turning on Node run- ning object snap, you 4. Right-click the Object Snap toggle in the status bar and turn on Node will be able to snap arcs and Endpoint in the menu. Toggle off any other snap options that are to all the point objects selected. Toggle on Object Snap if it is off. Press the spacebar to repeat the last command.

Click point D shown in Figure 5. Click each subsequent node around the right side of the lake until you reach point E in Figure 5. Press Enter. Certification 9.

Click the right polyline, and click outside the lake. Click the sample file are meant outer arc surrounding the pentagonal structure, and then click out- to guide you in the side the lake.

Click the Trim tool in the Modify panel. Press Enter to select all necessary when draw- objects as potential cutting edges, and click the portions of the arcs ing curves on your own. Zoom into the lower highlighted area, and trim the arcs at their tips so that they meet at their endpoints.

Certification Pan over to the building at the bottom of the lake. Click the lower- Objective left polyline to select it. Click the endpoint grip, move it down a short distance, and click again see Figure 5.

Press Esc, and then click the Undo button in the Quick Access toolbar. Click the Arc tool in the Draw panel, hold down Shift and right-click, and choose Nearest from the context menu. Click points A, B, and C in Figure 5. Press Enter twice to end and restart the ARC command. Type J for Join , and press Enter. Select all ive objects that comprise Objective the outer path three arcs and two polylines. Press Enter, and the command line reads as follows: 14 segments joined into 1 polyline There are 14 segments if you include all the arcs that make up the two polylines.

You are left with a single polyline marking the outer edge of the path. Press the spacebar to repeat the JOIN command.

Select the three objects along the inner edge of the path, which include two polylines Use JOIN to connect and the arc above the pentagon. Press Enter, and multiple segments collinear lines even if there is a gap between are joined into one polyline see Figure 5. JOIN is the The streamlined JOIN command makes the older workflow unnecessary. Multiple object types can be joined at once. The resulting object type depends on what was selected. Instead of stretching a cord from two pins to a moving pencil point which is how you draw an ellipse by hand , in AutoCAD you specify the lengths of its major and minor axes see Figure 5.

Zoom into the area in the lower left where the remaining point objects are located. The size of point objects is recalculated when the drawing is regenerated.

Certification Objective 3. Open the Ellipse menu in the Draw panel, and choose the Center method. Click the center point, the end of the major axis, and the end of the minor axis, shown in Figure 5. Every ellipse has four 4.

Expand the Modify panel and click the Break button. Select the quadrant points corre- ellipse. The command prompt reads as follows: sponding to the cardi- nal directions: north, BREAK Specify second break point or [First point]: south, west, and east. Click First Point on the command line. Right-click the Object Snap toggle in the status bar, and select Quadrant from the context menu. Click the quadrant point opposite the point object marking the end of the major axis see Figure 5.

The lower half of the ellipse remains, leaving an elliptical arc. Select the elliptical arc. Press Enter to accept the default when asked if you want to align the block with the selected object. Type 13 for the number of segments , and press Enter. Delete the three points used in drawing the ellipse, the elliptical mand always creates arc itself, and the white circle, which is the original Shrub block.

Fortunately, it is easy to switch between CVs and Fit Points editing modes, so you can make up your mind about which method to use to suit the situation.

A control frame connects CVs and represents the maximum possible curvature between adjacent CVs. Shape Splines 93 You will now draw a CV spline around the lake. Begin by opening Ex Click the irst point anywhere along the edge of the lake. Continue clicking points all the way around the lake. When you get close to the irst point, type C for Close and press Enter. Click the spline you just drew to reveal its CVs see Figure 5.

Position the cursor over a CV, and observe the multifunction grip menu. Select Stretch Vertex, move the cursor, and click to relocate CV curves are typically roughed in initially that particular CV. Try adding and removing vertices using the corresponding choices in shape immediately afterward. Reining a vertex transforms one vertex into two adjacent vertices.

Try reining vertices in areas where the curvature is changing rapidly. Another way to affect the shape of a spline is to adjust the weights of individual CVs.

Zoom out until you can see all the vertices, locate the red one, press Enter repeatedly to choose the default option Next , and move the red CV one position at a time until your chosen CV turns red. Shape Splines 95 Type 2, and press Enter see Figure 5. Type a value appro- need to enter depend priate to your particular situation, and press Enter. We set a weight of entirely on exactly 0.

CVs when creating the curve in step 2. Increase the weight of this CV. The curve is drawn closer to the control frame near the weighted CV. Type X for Exit , and press Enter. Continue adjusting the spline until it closely matches the outline of the lake. Type IM for Image , and press Enter. Close the External References palette. The pond is now represented by a blue curve rather than a blue image see Figure 5. The SKETCH command is admittedly difficult to use with a mouse, so if you have a stylus and a drawing tablet, try using them for a more natural drawing feel.

Controlling the shape of a it curve on the most basic level is a matter of adding more it points in strategic locations. There are a few advanced options affecting the shape of a spline in between it points Tangent, Tolerance, Kink, and Knot Parameterization , and you will use Kink in this exercise to establish sharp points on the spline.

Zoom into the area at the bottom of the lake. More speciically, zoom into the grouping of ive points. Expand the Draw panel, and click the Spline Fit tool at the top left. Toggle on Object Snap mode in the status bar with Node snap on , and click the top point, the point on the right, the bottom, and then the one on the left.

Type C for Close , and press Enter. The it curve looks very much like a circle, although it is not perfectly round see Figure 5. This will be the start of an abstract tree representation. Expand the Modify panel and click the Edit Spline button. Select the curve you drew in step 2. Choose Fit Data from the dynamic input menu.

Then choose Add from the next dynamic input menu that appears. Click the curve in between the top and right points. To use this feature, click the spline to select it, hover the cursor over the rightmost point, and choose Add Fit Point from the menu that appears.

Hold Shift, right-click, and choose Nearest from the context menu. Click a point between the right and bottom points. Repeat the previous step twice, adding additional it points between the bottom, left, and top points see Figure 5. Click Fit Data from the dynamic prompt menu. Press Enter three times to exit the com- mand fully. Click each kink grip, and move it in toward the center to create an abstract representation of a tree see Figure 5. Blend Between Objects with Splines 99