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Having created a floor, the PLOO geometry can be modified by moving, adding and deleting vertices, edges and arcs.

With the floor to be modified as the CE, selecting

Modify>Floor/Screed>Definition… from the main menu displays the Loop Vertex Editor form:

Form menu Control>CE

When the form is displayed, the CE name is displayed beneath the form menu.

Navigating to another floor and selecting this option makes the new CE the floor being edited by the form. The new CE name is displayed on the form.

Control>Close

This option dismisses the form.

Settings>Confirm This is a toggle option.

When set On, you must click the Modify/Create button, at the bottom of the form, to

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Settings>Confirm on delete This is a toggle option.

When set On, you must confirm each deletion before it is actioned.

When set Off, deletions are implemented immediately.

Settings>Tag edges This is a toggle option.

When set On, each edge is tagged with the number of the vertex at its start. Note that edges are tagged automatically, regardless of this setting if the floor has incorrect geometry for any reason (e.g. zero thickness).

Settings>Free rotate This is a toggle option.

When set On, this option allows groups of vertices to be oriented automatically when they are positioned relative to, say, one edge and are then moved to a different edge.

Utilities>Remove coincident

This option deletes redundant vertices in situations where two or more vertices have the same position.

Mode Selection

The options in the Mode Selection area of the form enable you to select a single vertex, an edge or a group of vertices to be modified or create a new vertex:

Select all, selects all vertices in the loop, so that you can modify them as a group.

Select group to modify, lets you select any number of individual vertices so that you can modify them as a group.

Select edge to modify, lets you pick an edge to be modified. The adjacent Edge gadget shows the current edge number (i.e. the number of the vertex at its start).

Select point to modify, lets you pick a vertex to be modified. The adjacent Vertex gadget shows the current vertex number.

Create points, lets you create a new vertex, which will be allocated the next number in the sequence after the current vertex.

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Vertex/Edge

The Vertex/Edge area of the form contains a Select button and a counter that shows the current vertex or edge, depending on the mode.

If you click the Select edge to modify button the counter label will change to Edge and the counter will show the current edge.

The Select vertex/edge button allows you pick a vertex in the 3D View. The adjacent Vertex counter shows the current vertex

number, which is also tagged in the 3D View. You can navigate to a specific vertex by typing its number in the text box or by using the up/down arrows to step through the vertex list.

The Select vertex/edge button allows you pick a vertex in the 3D View. The adjacent Edge counter shows the current edge number, which is also tagged in the 3D View. You can navigate to a specific vertex by typing its number in the text box or by using the up/down arrows to step through the vertex list

Group

When you are modifying a group of vertices, the buttons in the Group area of the form become active. The options let you modify the current group in the following ways:

Reverse group definition, reverses the group definition by implicitly renumbering all of the group vertices in the opposite sense (i.e., clockwise or anticlockwise). The origin moves to the other side of the

‘gap’. The sense of the current vertex sequence is shown by the aid arrow in the 3D View. Note that this change affects only the group’s behaviour; it does not affect the vertex numbering for the panel loop.

Move start forwards, moves the ‘open-side’ of the group, and the origin, one position ‘forwards’; that is, in the sense of the vertex numbering.

Move start backwards, moves the ‘open-side’ of the group, and the origin, one position backwards; that is, in the opposite sense to the vertex numbering.

Expand group, expands the group area by moving each edge

outwards, by the distance specified in the adjacent Expand/Contract text-box, normal to its own direction. Note that this applies to all edges, including those within cut-outs etc., so excessive expansion can lead to invalid loop geometry.

Contract group, contracts the group area by moving each edge inwards, by the distance specified in the adjacent Expand/Contract text-box, normal to its own direction. Note that this applies to all

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Line

When you are modifying an edge, the buttons in the Line area of the form become active. The options enable you to modify the current edge in the following ways:

Extend start of line, moves the Start vertex along the edge direction to align it through a picked position. Use the Positioning Control options to pick the required position. Alternatively, if you pick a line, the Start vertex will be moved along the edge direction until it intersects the picked line. These operations can change the edge length.

Extend end of line, moves the End vertex along the edge direction to align it through a picked position. Use the Positioning Control options to pick the required position. Alternatively, if you pick a line, the End vertex will be moved along the edge direction until it

intersects the picked line. These operations can change the edge length.

Make line parallel, moves the free vertex (lowercase tagging) around the reference vertex to align the edge with a picked line (another edge, a pline etc.). This operation maintains the edge length.

Rotate anti-clockwise, rotates the edge anticlockwise, through the Rotate Angle specified in the adjacent text-box, about the reference end (uppercase tagging). This operation maintains the edge length.

Rotate clockwise, rotates the edge clockwise, through Rotate Angle specified in the adjacent text-box, about the reference end (uppercase tagging). This operation maintains the edge length.

Rotate

The options in the Rotate area of the form enable you to rotate groups of vertices in the following ways:

Rotate group anti-clock-wise, rotates the group anticlockwise, through the Rotate Angle specified in the adjacent text-box, about its origin.

Rotate group clock-wise, rotates the group clockwise, through the Rotate Angle specified in the adjacent text box, about its origin.

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Modify

The Modify buttons enable you to carry out the following operations on the current selection:

Insert selected, lets you move a vertex group by inserting it at a different position in the loop sequence. Use the Vertex selector to navigate to the required point in the sequence; the group will be inserted after the current vertex.

Mirror, moves the current vertex, edge or group such that the new positions are derived by reflecting the original positions about a picked line (an edge, pline, etc.).

Delete selection, deletes the group, edge or vertex from the loop definition.

Define/Modify arc, lets you manipulate a fillet arc at the current loop vertex. When you click this button the Modify Arc form will be

displayed and the Loop Vertex Editor form will become temporarily inactive.

Co-ordinates

The bottom area of the Loop Vertex Editor form displays co-ordinate data about the current vertex or edge, depending on the Selection Mode, together with radius information where applicable.

Vertex

For a vertex the X and Y (East and North) co-ordinates, with respect to the floor origin, are displayed. There is no Z co-ordinate as the panel loop is a 2D object.

The Radius text box allows you to specify a radius to be applied to the loop at that vertex. This value is applied to the Fradius attribute of the vertex and may a be positive or negative value.

A value of 0, the default, will produce a ‘sharp’ corner at the vertex.

A positive value will produce a convex radius at the vertex.

A negative value will produce a concave radius at the vertex.

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Edge

For an edge the co-ordinates are given for the start or end of the edge. An aid is displayed in the 3D View showing which is the start and which is the end. By default the START will be shown in uppercase letters and the end shown in lowercase. This means that any modifications made to the currently displayed co-ordinates will affect the start only.

Using the selection gadget the end of the edge may be selected, in which case the start is shown in lowercase in the graphic view and the END shown in uppercase.

Modifications made will apply to the end of the edge only. It should be noted that modifying the Length in either of these cases will move the edge start or end accordingly.

Selecting the Aligned option will allow both the START and the END of the edge to be modified simultaneously. Both the start and the end are shown in uppercase in the graphic view. Generally you will only be able to modify an orthogonal edge in a direction normal to the edge itself. Care should be taken when modifying a non-orthogonal edge as unexpected results may occur.

Modify/Create button

The context of the button at the bottom of the form will depend on the mode. In Modify mode clicking the button will change the current vertex or edge using the values in the X, Y, Radius or Length text boxes. In Create mode, i.e. when adding a new vertex, clicking the button will create a new vertex with the values displayed in the X, Y or Radius text-boxes.

Moving the Floor Origin

When creating a floor the Origin will be placed at the first vertex by default and the XY co-ordinates of all other vertices in the floor relate to this position.

Selecting Position>Floor/Screed Origin from the main menu and selecting a

different vertex when prompted enables you to use a different vertex in the PLOO as the floor origin.

When you redefine the origin in this way, the coordinates of all vertices owned by the current PLOO are recalculated relative to the new origin such that their positions in the design model remain unchanged.

Modifying Floor Thickness and Justification Thickness

Although the panel thickness is set during creation it can be modified at any time.

With the panel you wish to modify as the CE, selecting

Modify>Floor/Screed>Thickness… from the main menu displays the Panel Thickness form:

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Entering a value in the text box and clicking the Apply button modifies the floor thickness.

If the floor has a fixed thickness specification set, the following message will be displayed and the thickness textbox will be greyed out:

Justification

Although the justification is set during floor creation it can be modified at any time.

With the panel you wish to modify as the CE, selecting

Modify>Floor/Screed>Justification… from the main menu displays the Set Justification form:

Selecting Bottom, Centre or Top from the Justification list and clicking the Apply button modifies the floor justification.

The in/out checkbox enables you to set the direction relative to the plane used to justify the floor as shown in the following diagram:

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