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package numbers
import (
"github.com/veandco/go-sdl2/sdl"
)
const width = 60
var digitSegments = [][]int{
{0, 1, 2, 4, 5, 6},
{2, 5},
{0, 2, 3, 4, 6},
{0, 2, 3, 5, 6},
{1, 2, 3, 5},
{0, 1, 3, 5, 6},
{0, 1, 3, 4, 5, 6},
{0, 2, 5},
{0, 1, 2, 3, 4, 5, 6},
{0, 1, 2, 3, 5, 6},
}
func drawDigit(renderer *sdl.Renderer, d int, x, y int32) error {
const (
height = 100
thickness = 10
)
for _, segment := range digitSegments[d] {
switch segment {
case 0:
renderer.FillRect(&sdl.Rect{X: x, Y: y, W: width, H: thickness})
case 1:
renderer.FillRect(&sdl.Rect{X: x, Y: y, W: thickness, H: height / 2})
case 2:
renderer.FillRect(&sdl.Rect{X: x + width - thickness, Y: y, W: thickness, H: height / 2})
case 3:
renderer.FillRect(&sdl.Rect{X: x, Y: y + height/2 - thickness/2, W: width, H: thickness})
case 4:
renderer.FillRect(&sdl.Rect{X: x, Y: y + height/2, W: thickness, H: height / 2})
case 5:
renderer.FillRect(&sdl.Rect{X: x + width - thickness, Y: y + height/2, W: thickness, H: height / 2})
case 6:
renderer.FillRect(&sdl.Rect{X: x, Y: y + height - thickness, W: width, H: thickness})
}
}
return nil
}
func Draw(renderer *sdl.Renderer, n int, x, y int32) error {
const padding = 20
if err := renderer.SetDrawColor(245, 245, 245, 255); err != nil {
return err
}
if n == 0 {
return drawDigit(renderer, 0, x, y)
}
digits := make([]int, 0, 19)
for ; n > 0; n /= 10 {
digits = append(digits, n%10)
}
for i := len(digits) - 1; i >= 0; i-- {
if err := drawDigit(renderer, digits[i], x, y); err != nil {
return err
}
x += width + padding
}
return nil
}
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