Altium Designer Documentation

Editing Polygonal Shaped Objects

Modified by Jason Howie on Apr 11, 2018
このページは、サポート対象外となったAltium Vaultについて紹介しています。Altium Vaultとそのコンポーネント管理機能は Altium Concord Proに移行しました。
  • Region - Region objects are used to create polygonal-shaped copper regions, polygon cutouts, board cutouts and cavity definitions.
  • Polygon - Polygons can be created from region objects or tracks and arcs. When created from regions each isolated section of copper is a region object.
  • Extruded 3D Body - The plan view of an extruded 3D Body is defined as a polygonal shape.
  • Board Shape -  a board shape, or board outline, is a closed polygon that defines the boundary, or extents, of the board.
  • Room - A room is a primitive design object. It is a region that assists in the placement of components.

The editing behavior of polygonal-shaped design objects is consistent across all objects.

 Editing a Polygonal Object

Click once on a polygonal object to select it, which then puts the polygonal object into edit mode. The outer shape of the polygonal object is defined by a series of edges: where each edge is represented by an end vertex at each end, shown as a solid white square; and a center vertex in the middle, shown as a hollow white square. Each end vertex represents the location where 2 edges meet.

Combining Selected Polygon Pours

Two or more polygon pour objects can be combined by performing the following sequence of actions:

  1. Place new (or drag existing polygon pours) so that they are overlapping each other as required.
  2. Select all polygon pours that are to be combined.
  3. Right-click over one of the pours in the selection then choose the Polygon Actions » Combine Selected Polygons command from the context menu.
The new polygon properties is copied from the first selected poly in each colliding group.


Combining two existing polygon pours to make a single polygon pour.

Subtracting Selected Polygon Pours

One or more polygon pour objects can be subtracted from another 'base' polygon pour by performing the following sequence of actions:

  1. Place new, or drag existing polygon pours so that they are overlapping the required base polygon pour -  this is the pour to be 'subtracted from'.
  2. Select the base polygon pour, right-click, and choose the Polygon Actions » Subtract Polygons from Selected command from the context menu.
  3. Select the polygons to be subtracted.
  4. Right-click or press Esc to complete the process. The polygon will need to be repoured afterwards.


Subtracting an existing polygon pour from an existing 'base' polygon pour.

Modify Polygon Border

In addition to the improved vertex editing, there is also a new Modify Polygon Border command which allows designers to easily change the shape of polygons. The command is run by right-clicking on the desired polygon and selecting Polygon Actions » Modify Polygon Border. Once the command is launched, the cursor becomes a crosshair. Each time you click, a new vertex is added. As during polygon placement, the Shift+Spacebar keys can be used to change corner shapes.


Modifying a polygon border followed by vertex correction.

Modify Board Shape

Similarly to the new modify polygon border command,, there is also a new Modify Board Shape command which allows designers to easily change the shape of their board. The command is accessed in Board Planning mode run by  selecting  Design » Modify Board Shape. Once the command is launched, the cursor becomes a crosshair. Each time you click, a new vertex is added. The Shift+Spacebar keys can be used to change corner shapes.


Modifying the board shape.

Modify Region Border

In addition to the improved vertex editing, there is also a new Modify Region Border command which allows designers to easily change the shape of polygons. The command is run by right-clicking on the desired region and selecting  Polygon Actions » Modify Polygon Border. Once the command is launched, the cursor becomes a crosshair. Each time you click, a new vertex is added. The Shift+Spacebar keys can be used to change corner shapes.

Vertex Editing Modes

When editing polygons, there are 3 editing modes available, Miter, Incurvate (arc) and Move. The current mode can be changed while dragging a vertex by pressing the Shift+Spacebar keys to cycle through the 3 modes. Feedback about where the cursor is on the board and which editing mode is currently active can be viewed on the Status bar and in the Heads-Up display.

Break Mode

In this mode, click and drag on the center vertex to break that edge into 2 edges. The cursor displays a double-arrow, indicating the Break mode. Note that the mouse cursor has 4 arrow heads, indicating that you can drag this vertex in all 4 directions.

 Breaking an arc into 2 arcs.

 Breaking a straight edge into 2 straight edges.

Incurvate (Arc) Mode

In this mode, click and drag on the center vertex to incurvate, or arc, that edge. Note that the mouse cursor has 2 arrow heads, indicating that you can drag this vertex in 2 directions.

 
Arcing an arc edge into a larger or smaller arc


Arcing a straight edge.

Move Mode

In this mode, click and drag on the center vertex to move that edge, maintaining the edge length. Note that the mouse cursor has 4 arrow heads, indicating that you can drag this vertex in all 4 directions.

 
Moving an arc while maintaining its length.

 
Moving a straight edge while maintaining its length.

Corner Vertex Behavior

The 3 editing modes are also available when moving a corner vertex.


The left image shows the mouse hovering over the corner vertex, the right image shows the vertex moving in Moving Vertex mode.


The left image shows the vertex moving in Mitering to Arc mode, the right image shows the vertex moving in Mitering to Segment mode.

Sliding an Edge

When you hover over an edge, that edge displays as a thick white line. Click+drag on the edge to slide it, shrinking or growing the moving edge to maintain the position of adjoining edges.


Sliding the arc edge while maintaining the size and position of adjoining edges.


Sliding the straight edge while maintaining the size and position of adjoining edges.

Adding or Deleting a Vertex

You can interactively add a vertex or delete a vertex using the following techniques:

  • To add a vertex, hold Ctrl then position the cursor along the edge — the new vertex displays under the cursor — click and move the cursor slightly to insert the new vertex.
  • To delete a vertex, click and hold on the vertex as if you were going to move it, then press the Delete key.


Ctrl, hover, and click to add a vertex (left image), or click & hold on an existing vertex, and use the Delete key, to remove that vertex (right image).

Alignment Guides

As you move a vertex around, green alignment guides will appear. These appear at useful locations, for example when the vertex location will result in the new edge aligning with an existing edge or when an arc chord aligns with the adjacent edge. There is a slight stickiness when the guidelines appear, making it easy to maintain that vertex position.

 
Left - using the guideline to remove an arc (incurvate mode). Right - using the guidelines to align a new arc to existing edges.

 
Left - using the guidelines to help align the breaking edge with existing edges. Right - using the guidelines to align the new vertex location to existing vertices.

If required during vertex movement, guidelines can be disabled by holding Shift.
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