Project: HiCAD 2-D

Hatching

2-D Part > Hatching

HiCAD provides two ways of hatching closed contours:

part-based hatching (GE in one part)
contour-based hatching (GE in different parts)

In part-based hatching, the area bordered by a closed polyline is hatched. The graphical elements of the closed polyline need to be contained in one part.

The structure of a polyline can be as complex as required, but may consist of no more than 2,500 different graphical elements. If a polyline contains more than 2,500 graphical elements, it must be split into more than one part and each closed surface hatched separately.

Graphical elements that do not form a closed polyline in terms of HiCAD, even though they are optically contiguous, are ignored in part-based hatching.

We particularly recommend the use of part-based hatching for standard and default parts.

In contour-based hatching, the interior of closed polylines is hatched; the graphical elements can, however, belong to different parts. A hatching reference point needs to be created for this hatching.

Contour-based hatching is much more flexible than part-based hatching. Before hatching, however, the corresponding contour needs to be determined.

You can define any exclusions you like in hatchings.

In part-based hatching, all parts (provided they are closed continuous lines) that lie in the same main part as the part to be hatched can be subtracted.

Contour-based hatching only takes into account those exclusions the hatching reference point of which is located in the same part as the exclusion element.

Texts and dimensionings can be bound to hatching exclusions, being automatically changed when the latter are changed.

You must provide a definition of the hatching codes used, in SRAFFUR.DAT. Each hatching code is defined by means of:

the colour and
the line type

of the hatching lines. The layer is defined when the hatching is created.

If the hatching is created based on parts, the corresponding hatching code is entered into the active part. The graphical elements all belong to the same part.

In contour-based hatching, the hatching code is entered into the active part, but you can position the corresponding contour elements as you wish.

You can also fill the contour to be hatched with any symbol, which you cannot do in part-based hatching.

To increase the character rate, you can hide the hatching in Drawing > Others > Visualisation > Via element type.

The parts have been filled with different hatching codes in the following example.

You can fid the Hatching function group on the 2-D Part tab. If you have activated a part, you can also call the function via the context menu of the part (right-click the part and select the function).

Function		Description
	Define part hatching
Pull-down menu Define/change part hatching
	Part Hatching, same as Reference Part	Identifying the reference part gives the active part the same hatching.
	Change spacing, in rectangle	This function changes the spacing of the hatching lines. The spacing is specified in millimetres and is invariant to scale. First enter the new spacing and then drag a rectangle over the hatching area.
	Define contour hatching
	Material hatching

	Part hatching, exclude with rectangle
Pull-down menu Part hatching, exclude
	Part hatching, exclude with polyline

	Delete, Active part	Activating this function immediately deletes the hatching of the active part.
Pull-down menu Delete part hatching
	Delete, in rectangle	The hatching of the parts located partially or wholly in the rectangle is deleted.
	Delete exclusions
	Part hatching, Delete exclusion	Identifying the exclusion deletes it.
	Delete contour hatching / material hatching	After choosing the identification type, you can delete hatchings and exclusions.

Part Functions (2-D)

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