There are a number of methods of creating a user-defined Brush, as follows:
One way to define a User-defined Brush is to modify the settings of a Brush which exists in a New Library, having either been created as a new Brush or copied from the (standard) library.
Example:
Copy the Black Brush from the (standard) library to the (temporary) library and rename it to MyNewBrush.
Either:
or
Either method will display the Edit Brush - MyNewBrush dialog:
Editing MyNewBrush, as follows:
The (default background) drop-down allows you see how the brush will appear against a range of backgrounds, 1:250 000 Scale Raster and OS StreetView® are shown below as examples:
If any changes are made to MyNewBrush, the name in the Properties of Brush dialog will be replaced by (user-defined).
MyNewBrush will now take on the new characteristics.
A user-defined Brush can also be created by writing the JSON to define the Brush and pasting this code directly into a Brush in an editable library via the Edit Brush dialog, Clipboard - Paste option:
Right-click on a Polygon item in the Map Window and select Properties... from the local menu to display the Properties of Polygon dialog:
Display the Brush drop-down list and click on the right-arrow at the bottom to display the Edit Brush dialog:
Any change to the Brush will cause the named entry previously shown in the Item Properties tab, Style, Brush-Value, to be replaced with the JSON for the new Brush.
It is not possible to save the new Brush using this method. If the Brush is to be saved you can create a new Brush and copy the code for this Brush to it using the Clipboard>Copy/Paste facility on the Edit Brush dialog, see Pasting JSON into a Brush.
JSON: {"Brush":{"Style":"Hatched","Pattern":"-","Colour":{"RGBA":[255,0,0,0]},"BackgroundColour":{"RGBA":[255,255,0,255]}}}
The above JSON would appear as follows when formatted in a JSON viewer:
JSON: {"Brush":{"Style":"Hatched","Pattern":"X","Colour":{"RGBA":[0,0,0,0]},"BackgroundColour":{"RGBA":[0,255,0,0]},"GapX":2000,"GapY":2000,"HatchX":true,"HatchY":true,"Symbol":"Circle"}}
The above JSON would appear as follows when formatted in a JSON viewer:
In Cadcorp SIS V6 user-defined (then called implicit) Brushes were created in a Cadcorp proprietary format.
When loading a Cadcorp SIS V6 implicit Brush the properties will remain in Cadcorp SIS V6 format until a change is made to the code, the properties will then be converted to the current version of SIS format. Changes made to the Brush using the local Properties/Properties of Polygon dialog will not change the properties to the current SIS format.
The following are examples of Brushes defined in Cadcorp SIS version 6:
B_ht_r:g:b_r2:g2:b2 where:
B
|
means brush |
h
|
hatching pattern: S for solid; H for hollow; or one of +, X, |, -, \, / |
t
|
transparency: T for transparent; or O for opaque |
r:g:b
|
are red, green and blue values from 0 to 255 |
r2:g2:b2
|
are red, green and blue values from 0 to 255 which define the background colour (optional). |
For example, B_SO_128:0:128 would display areas as solid, opaque purple areas. In addition, hatching patterns, shapes and bitmaps can be appended to the implicit brush string as follows:
B_ht_r:g:b_r2:g2:b2_gapx_gapy_angle_hatchX_hatchY_rotateShape_{pen,shape,bitmap} where:
gapx,gapy
|
are the gaps between hatch lines, or between shape and bitmap repetitions, in 1/100ths of a millimetre |
angle
|
is the hatch angle, in 1/10ths of a degree |
hatchX,hatchY
|
are boolean flags controlling whether or not hatch lines are drawn |
rotateShape
|
enables the Symbol to be rotated to the hatch angle |
pen
|
is the hatch line Pen |
shape
|
is the repeated Symbol |
bitmap
|
is the repeated bitmap (an Item), scaled to fit into (gapX,gapY), but ignoring the hatch angle |
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