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Created a convenience constructor for Inset

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This commit is contained in:
Sasha Koshka
2023-03-23 18:05:30 -04:00
parent 6a08d0f317
commit 8447b06641
3 changed files with 34 additions and 12 deletions
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22
artist/inset.go
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@@ -15,6 +15,28 @@ type Side int; const (
// the left at index three. These values may be negative.
type Inset [4]int
// I allows you to create an inset in a CSS-ish way:
//
// - One argument: all sides are set to this value
// - Two arguments: the top and bottom sides are set to the first value, and
// the left and right sides are set to the second value.
// - Three arguments: the top side is set by the first value, the left and
// right sides are set by the second vaue, and the bottom side is set by the
// third value.
// - Four arguments: each value corresponds to a side.
//
// This function will panic if an argument count that isn't one of these is
// given.
func I (sides ...int) Inset {
switch len(sides) {
case 1: return Inset { sides[0], sides[0], sides[0], sides[0] }
case 2: return Inset { sides[0], sides[1], sides[0], sides[1] }
case 3: return Inset { sides[0], sides[1], sides[2], sides[1] }
case 4: return Inset { sides[0], sides[1], sides[2], sides[3] }
default: panic("I: illegal argument count.")
}
}
// Apply returns the given rectangle, shrunk on all four sides by the given
// inset. If a measurment of the inset is negative, that side will instead be
// expanded outward. If the rectangle's dimensions cannot be reduced any