47 lines
1.1 KiB
Go
47 lines
1.1 KiB
Go
package artist
|
|
|
|
import "image/color"
|
|
|
|
// Beveled is a pattern that has a highlight section and a shadow section.
|
|
type Beveled [2]Pattern
|
|
|
|
// AtWhen satisfies the Pattern interface.
|
|
func (pattern Beveled) AtWhen (x, y, width, height int) (c color.RGBA) {
|
|
return QuadBeveled {
|
|
pattern[0],
|
|
pattern[1],
|
|
pattern[1],
|
|
pattern[0],
|
|
}.AtWhen(x, y, width, height)
|
|
}
|
|
|
|
// QuadBeveled is like Beveled, but with four sides. A pattern can be specified
|
|
// for each one.
|
|
type QuadBeveled [4]Pattern
|
|
|
|
// AtWhen satisfies the Pattern interface.
|
|
func (pattern QuadBeveled) AtWhen (x, y, width, height int) (c color.RGBA) {
|
|
bottom := y > height / 2
|
|
right := x > width / 2
|
|
top := !bottom
|
|
left := !right
|
|
side := 0
|
|
|
|
switch {
|
|
case top && left:
|
|
if x > y { side = 0 } else { side = 3 }
|
|
|
|
case top && right:
|
|
if width - x < y { side = 1 } else { side = 0 }
|
|
|
|
case bottom && left:
|
|
if x > height - y { side = 2 } else { side = 3 }
|
|
|
|
case bottom && right:
|
|
if width - x < height - y { side = 1 } else { side = 2 }
|
|
|
|
}
|
|
|
|
return pattern[side].AtWhen(x, y, width, height)
|
|
}
|