ZacharyZhang-NY
81003b21ee
Fifteen pieces of a games night: Dice, DiceTray, PlayingCard, CardHand, Deck, Chessboard, GoBoard, MahjongTile, Domino, Roulette, CoinFlip, BingoCard, TicTacToe, ScoreTrack and Meeple. Component number 500 is a meeple, which seems right. Dice tumble, coins turn and wheels spin on a cue, a frame at a time, and land at once under Reduce Motion. Hands lift the card you point at and play the one drawn on top; pieces and stones pick the lighter of Lit and Ink for White, so they read in every palette; the computer plays a fair O; FREE is a star in every language. New 12x12 icons: Spade, Club, Diamond, Meeple, King, Queen, Rook, Bishop, Knight and Pawn.
62 lines
1.9 KiB
Go
62 lines
1.9 KiB
Go
package tabletop
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import (
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"fmt"
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"math"
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"slices"
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"github.com/egoist/mygo/ui"
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"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
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)
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type RouletteOptions struct {
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// Cue spins it: each new cue lands it on result.
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Cue int
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}
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const wheel = 28
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// Roulette spins its wheel, on a new Cue, to result.
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func Roulette(c *ui.Context, text string, segments []string, result int, o RouletteOptions) *ui.Element {
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k := pixel.K(c)
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n := len(segments)
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if n < 2 || n > 64 || result < 0 || result >= n || slices.Contains(segments, "") {
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panic(fmt.Sprintf("tabletop: Roulette lands on %d of %d segments, or one is blank", result, n))
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}
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e := ui.Column(c).Gap(k.D(2)).AlignItems(ui.Center).AlignSelf(ui.Start).Role(ui.RoleGroup).Label(text).Description(segments[result])
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// A spin: a lap plus twelve, a segment a frame.
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total := n + 12
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f := k.Shot(c, e, o.Cue, 15, total)
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under := ((result-(total-f))%n + n) % n
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return e.Children(func() {
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ui.Box(c).Size(k.D(2*wheel+1), k.D(2*wheel+6)).Role(ui.RoleNone).Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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cx, cy, step := wheel, wheel+5, 2*math.Pi/float64(n)
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for dy := -wheel; dy <= wheel; dy++ {
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for dx := -wheel; dx <= wheel; dx++ {
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if dx*dx+dy*dy > wheel*wheel {
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continue
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}
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// Wedges run clockwise from the top; the pointer reads one.
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t := math.Mod(math.Atan2(float64(dx), float64(-dy))+step/2+2*math.Pi, 2*math.Pi)
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i := (int(t/step)%n + under) % n
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ink := []pixel.Slot{pixel.Bad, pixel.Ink}[i%2]
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if i == 0 {
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ink = pixel.Good
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}
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g.Dot(cx+dx, cy+dy, ink)
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}
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}
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g.Circle(cx, cy, wheel, pixel.Edge)
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g.Disc(cx, cy, 4, pixel.Warn)
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g.Circle(cx, cy, 4, pixel.Edge)
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// The pointer hangs over the rim at twelve o'clock.
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for j := range 4 {
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g.HLine(cx-3+j, j, 7-2*j, pixel.Warn)
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}
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})
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pixel.Text(c, segments[under], pixel.TextOptions{})
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})
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}
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