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Shaping curve objects in CorelDRAW

Shaping curve objects in CorelDRAW

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Shaping curve objects

You can shape curve objects by manipulating their nodes and segments, and by adding and deleting nodes.

Selecting and moving nodes

You can select individual, multiple, or all of the objectís nodes. Selecting multiple nodes lets you shape different parts of an object simultaneously. You can marquee select nodes by enclosing them with a rectangular marquee box, or by enclosing them with an irregularly shaped marquee box. Freehand marquee selection is useful when you want to select specific nodes in complex curves.

When a node is selected on curved segments, control handles are displayed. You can adjust the shape of the curved segments by moving the nodes and control handles.

Usually, a control handle is displayed as a solid blue arrowhead (left). When a control handle overlaps with a node, it is displayed as an unfilled blue arrowhead beside the node (right).

The Shape tool is the standard tool for moving nodes. You can also use the Pick and Bťzier tools to move nodes.

Manipulating segments
You can move curved segments to change an objectís shape. You can also control the smoothness of curved segments.

You can change the direction of a curve object by reversing the position of its start and end nodes. The effect is apparent only when the ends of a curve object are different. For example, when an arrowhead is applied to the end node of a curve object, changing the direction results in moving the arrowhead to the start node.
 

 

Changing the direction of a curve

Adding, removing, joining, and aligning nodes
When you add nodes, you increase the number of segments and, therefore, the amount of control you have over the shape of the object. You can delete selected nodes to simplify an objectís shape.

When curve objects contain many nodes, it is difficult to edit and output them to devices such as vinyl cutters, plotters, and rotary engravers. You can have the number of nodes in a curve object reduced automatically. Reducing the number of nodes removes overlapping nodes and can smoothe a curve object.

A curve object is made up of components called paths. A path can be open (for example, a line) or closed (for example, an ellipse) and can consist of a single line, or a curve segment, or many joined segments. You can add color to the inside of closed paths. To apply a fill to an open path, such as a line, you first need to join its start and end nodes to create a closed object. For information about applying fills, see "Filling objects." If the paths consist of multiple subpaths, you can break paths apart to extract subpaths. For more information about paths, see "Reference: Shaping objects."

You can align the nodes of a curve object horizontally or vertically.

Using node types
You can change the nodes on a curve object to one of four types: cusp, smooth, symmetrical, or line. The control handles of each node type behave differently.

Cusp nodes let you create sharp transitions, such as corners or sharp angles, in a curve object. You can move the control handles in a cusp node independently of one another, changing only the line on one side of the node.

With smooth nodes, the lines passing through the node take on the shape of a curve, producing smooth transitions between line segments. The control handles of a smooth node are always directly opposite one another, but they may be at different distances from the node.

Symmetrical nodes are similar to smooth nodes. They create a smooth transition between line segments, but they also let you give lines on both sides of a node the same curve appearance. The control handles of symmetrical nodes are directly opposite each other and at an equal distance from the node.

Line nodes let you shape curve objects by changing the shape of their segments. You can make a curved segment straight or a straight segment curved. Making a straight segment curved does not noticeably change the segmentís appearance, but it displays control handles that you can move to change the segmentís shape.

Left to right: Cusp, smooth, symmetrical, and line nodes

Transforming nodes
You can shape objects by stretching, scaling, rotating, and skewing their nodes. For example, you can scale the corner nodes of a curve object to enlarge the curve object proportionally. Also, a curve object or parts of a curve object can be rotated in a counterclockwise or clockwise direction.

 

Process to select a node

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To select a node

  1. Open the Shape edit flyout , and click the Shape tool .

  2. Select a curve object.

  3. Click a node.

You can also

 

Marquee select multiple nodes

On the property bar, choose Rectangular from the Shape tool selection mode list box, and drag around the nodes that you want to select.

Freehand marquee select multiple nodes

On the property bar, choose Freehand from the Shape tool selection mode list box, and drag around the nodes you want to select.

Select multiple nodes

Hold down Shift, and click each node.

Select all nodes on a selected curved object

Click Edit Select all Nodes.

Select the first or last node of a curve object

Press Home or End.

Select the node that follows or precedes a selected node

Press Tab or Shift + Tab.

Deselect a node

Hold down Shift, and click a selected node.

Deselect multiple nodes

Hold down Shift, and click each selected node.

Deselect all nodes

Click an unused space in the drawing window.

You can also select a node by using the Pick , Freehand , Bťzier , or Polyline tool . To do this, first click Tools Options. In the Workspace list of categories, click Display, and make sure that the Enable node tracking check box is enabled. Click a curve object, move the pointer over a node until the toolís shape state cursor appears, and click the node. Note that when the Enable node tracking check box is enabled, the snapping feature is not available

 

Process to move a node or control handle

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To move a node or control handle .

Select an object by using the Shape tool .
2. Click a node.
3. Drag the node or any of the control handles to shape the segments on both sides.

You can change a controlís handle angle and distance from the node to shape a segment.

You can also select a node by using the Pick , Freehand , Bťzier , or Polyline tool . To do this, first click Tools Options. In the Workspace list of categories, click Display, and make sure that the Enable node tracking check box is enabled. Click a curve object, move the pointer over a node until the toolís shape state cursor appears, and click the node. Note that when the Enable node tracking check box is enabled, the snapping feature is not available


Process to manipulate a curve objectís segments

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To manipulate a curve objectís segments

  1. Open the Shape edit flyout  , and click the Shape tool .

  2. Click a curve object.

  3. Drag a segment until itís the shape you want.

You can also

 

Straighten a curve segment

Click a curve segment, and click the Convert curve to line button on the property bar.

Curve a straight segment

Click a straight segment, and click the Convert line to curve button on the property bar.

Smooth a segment

Click a node, and move the Curve smoothness slider on the property bar. To smooth all segments in a curve object, select all of the objectís nodes before moving the Curve smoothness slider.

Change the direction of a curve object

Click a segment, and click the Reverse curve direction button on the property bar.

 

Process to add or delete a node

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To add or delete a node

To

Do the following

Add a node

Open the Shape edit flyout , click the Shape tool , select a curve object, and double-click where you want to add a node.

Delete a node

Open the Shape edit flyout, click the Shape tool, select a curve object, and double-click a node.

 

Process to reduce the number of nodes in a curve object

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To reduce the number of nodes in a curve object

  1. Open the Shape edit flyout , and click the Shape tool .

  2. Click a curve object, and do one of the following:

    • To reduce the number of nodes in the entire object, click the Select all nodes button on the property bar.

    • To reduce the number of nodes in a part of a curve object, marquee select the part you want to change.

  3. Do one of the following:

    • Click Reduce nodes on the property bar to have overlapping and redundant nodes automatically removed.

    • Move the Curve smoothness slider to control the number of nodes that are removed. Removing many nodes can reshape the curve object.
       

 

Process to join the end nodes of a single subpath

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To join the end nodes of a single subpath

  1. Open the Shape edit flyout , and click the Shape tool .

  2. Click a subpath.

  3. Click the Auto-close curve button on the property bar.

You can close multiple subpaths by clicking Arrange Close path.

 

Process to join the nodes of multiple subpaths

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To join the nodes of multiple subpaths

  1. Open the Shape edit   flyout , and click the Shape tool .

  2. Press Shift, and click a node from each subpath.

  3. Click the Extend curve to close button on the property bar.

 If you want to join nodes from separate curve objects, you must first combine them into a single curve object, and then join the end nodes of the new subpaths

 

Process to break a path 

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To break a path

To

Do the following

Break a path

Open the Shape edit flyout , and click the Shape tool . Select a node on the path, and click the Break curve button on the property bar.

 

Extract a broken path from an object

Open the Shape edit flyout, and click the Shape tool. Right-click a path, and click Break apart. Select a segment, node, or group of nodes that represents the portion of the path you want to extract, and click the Extract subpath button on the property bar.

 

Process to align nodes

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To align nodes

I Open the Shape edit flyout , and click the Shape tool .
2. Select a curve object.
3. Press Shift, and select the nodes you want to align.
4. Click the Align nodes button on the property bar

 

Process to shape a curve object by using cusp, smooth, or symmetrical nodes

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To shape a curve object by using cusp, smooth, or symmetrical nodes

  1. Open the Shape edit flyout , and click the Shape tool .

  2. Click a node.

  3. On the property bar, click one of the following buttons:

    • Make node a cusp

    • Make node smooth

    • Make node symmetrical

  4. Drag the nodeís control handles.

You can also change an existing node from one type to another by using shortcut keys. To change a smooth node to a cusp node or a cusp node to a smooth node, click the node using the Shape tool, and press C. To change a symmetrical node to a smooth node or a smooth node to a symmetrical node, click the node with the Shape tool, and press S .

 

Process to stretch, scale, rotate, or skew nodes

Top

To stretch, scale, rotate, or skew nodes

  1. Open the Shape edit flyout , and click the Shape tool .

  2. Select a curve object.

  3. Select the nodes along the curve that you want to transform.

  4. On the property bar, click one of the following buttons:

    • Stretch and scale nodes

    • Rotate and skew nodes

  5. Drag a set of handles to transform the nodes.

 


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