Boolean Glyph Math ↩
RoboFont adds common boolean path operations – difference, union, intersection and exclusive or – to glyph objects, using special characters as operators.
| operation | operator |
|---|---|
| difference | % |
| union | | |
| intersection | & |
| exclusive or | ^ |
The example below shows the four boolean path operations in action:
When performing a difference operation, the order of the operands matters!
# get the current font
font = CurrentFont()
g1 = font["A"]
g2 = font["B"]
# difference
result = g1 % g2
dest = font.newGlyph("difference_1")
dest.clear()
dest.appendGlyph(result)
# difference
result = g2 % g1
dest = font.newGlyph("difference_2")
dest.clear()
dest.appendGlyph(result)
# union
result = g1 | g2
dest = font.newGlyph("union")
dest.clear()
dest.appendGlyph(result)
# intersection
result = g1 & g2
dest = font.newGlyph("intersection")
dest.clear()
dest.appendGlyph(result)
# xor
result = g1 ^ g2
dest = font.newGlyph("xor")
dest.clear()
dest.appendGlyph(result)