More

Modify Roof – More… >

(Note that some options are only available from the Pulldown Menu)

The More… option has an advanced command submenu of options. These commands allow you to perform roof edits necessary to model unusual roof shapes.

In short, you can:

insert new lines from one point to the next such as drawing in new hips, valleys and ridges.
move and copy existing lines;
trim (extend) lines to hit other lines or roof planes;
divide lines into smaller segments;
insert roof planes individually by digitizing the lines which form the border of the plane;
intersect lines and roof planes with cutting planes leaving points and lines respectively;
cut a hole into a plane;
merge two planes together;
attach one plane onto another;
perform random cut outs.

The process for editing a roof involves 3 steps:

Identifying and deleting the roof planes which will be affected by the edits.
Trimming existing line work to suit or perhaps insert new line-work.
Reinserting the new roof planes by digitizing line-work that defines the boundary of the new plane.

Remember: you may have to assign line-types to the new line-work (eg make a line an eave etc) by using Tools > Change Entity > Line Type. Also, you can make a plane a roof plane with the Tools > Change Entity > Plane Type command.

Insert Line

(Pulldown Menu)
This command allows you to insert lines in one of several ways. When you select Insert Line, the following submenu is displayed

Free In this case you either digitise 2 points or enter coordinates to insert a line.
Hor-Len To insert a horizontal line of a user defined length
Ver-Len To insert a vertical line of a user defined length
Angle-Len To insert a line a given angle and length from an existing line
Parallel= To insert a line parallel to an existing line by a user amount

These are virtually identical to the CAD > Line Insert options.

Move-Line

(Pulldown Menu)
This command allows you to move a line from one point to another. The drag point for the line, is the end closer to which you selected the line.

Remember: to locate this line at an existing point, make sure you use the middle button which snaps to existing points. If you use the left mouse button, it will not snap to a close point.

Copy-Line

(Pulldown Menu)
This command allows you to copy a line from one point to another. The drag point for the line, is the end closer to which you selected the line.

Trim-Line

(Pulldown Menu)
This command lets you trim one line to another. You first select the line to trim at the end you want to move, then select the line to trim to.

Note: If the two lines do not truly intersect in 3D space, then the line will not be trimmed and in the prompt area you are reminded, “Lines do not Intersect”. Also, if the line is part of a roof plane, then it won’t be trimmed, as it is not a free entity (not connected to anything else) and only free entities can be trimmed.

Apart from selecting a line to trim to, you could also digitise a point, or snap to an existing point. The resulting trimmed line will then be squared off to that point.

Trim Corner

(Pulldown Menu)
This command trims two lines to form a corner. Unlike the previous command, both lines are modified. You first select the line to trim at the trim end, then the line to trim to.

This command divides a line. The line may be part of a roof plane. You would use this if you want a line which has an eave along its first half and nothing along the second half.

Del-Line

(Pulldown Menu)
This command allows you to delete lines and planes.

Cut-Line

(Pulldown Menu)
This command lets you define a cutting orientation and intersect an existing line leaving a point entity. You first define how you want to define the cutting plane in one of several ways:

Line The cutting line will be defined by the selected line and projected up (in the Z)
2-Points The cutting line will be defined by 2 points and projected up
3-Points The cutting line is defined by 3-Points you digitise
Plane The cutting line is defined by a roof plane you select
CPL-XY The cutting line is in the XY plane
CPL-YZ The cutting line is in the YZ plane
CPL-XZ The cutting line is in the XZ plane

You would commonly use Plane (above) as the cutting plane definition method. However, an understanding of each will only enhance your modelling capability.

After selecting the cutting line method, you then define the cutting plane. (eg for Line, select the line, for Plane, select the plane). Then, you select the line you want to cut. If the cutting plane and line are not parallel, then a point is inserted at the intersection location. You then use this point for roof plane construction purposes.