768 | Corel Painter 2015 User Guide
In this tie-up, alternate black cells that are positioned in the fourth row and column instruct
the warp thread (white) to be placed in front of the weft thread (black). Notice that the
addition of the black cells in the fourth row and column produces a checkerboard effect.
To modify the tie-up
• In the Edit Weave dialog box, click a cell in the grid.
If you click a white cell, the cell changes to black, which places the warp thread in front of the weft.
If you click a black cell, the cell changes to white, which places the weft thread in front of the warp.
Reference: Expression operators
You need to learn how to use the weaving pattern language expression operators to effectively draft a
weave pattern.
The Weaving Pattern Expression Language is designed around a group of values, called the domain of
the pattern. For the warp or weft sequences, the domain is made up of the numbers 1 through 8, which
correspond to the harnesses and treadles in the tie-up.
Patterns wrap around on their domain so the number one higher than 8 is actually 1, and the number one
lower than 1 is actually 8. This is called modular arithmetic. For example, some are found in the sequences
5678123 or 3218765.
The following table defines a few commonly used terms.
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