ZacharyZhang-NY
f48075230f
Health, mana and experience bars, quarter hearts, lives, a spinning coin counter, score board, stage timer, minimap with fog, compass, hotbar, paper-doll equipment, skill tree, skill buttons with cooldown wipes, status effects, a boss bar, damage numbers, quest log and tracker, party frames, character sheet, level-up screen and shop. data exports DrawSlot so every slot looks alike; pixel adds TextVeil for dissolving text. Messages the font cannot draw are fixed and TestMessagesHaveGlyphs holds every message to the font.
89 lines
2.3 KiB
Go
89 lines
2.3 KiB
Go
package game
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import (
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"fmt"
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"strconv"
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"strings"
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"time"
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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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// Hit is a number rising from dot X, Y.
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type Hit struct {
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Value int
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Crit bool
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X, Y int
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at time.Time
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}
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type DamageNumbersOptions struct {
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// Width and Height are dots; zeros mean 160 by 80.
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Width, Height int
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}
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// life is a number's time; it dissolves the last half.
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const life = 800 * time.Millisecond
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// DamageNumbers floats hits up, dissolves, then drops them.
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func DamageNumbers(c *ui.Context, text string, hits *[]Hit, o DamageNumbersOptions) *ui.Element {
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k := pixel.K(c)
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w, h := pixel.Or("DamageNumbers Width", o.Width, 160), pixel.Or("DamageNumbers Height", o.Height, 80)
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now := k.Now()
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live := (*hits)[:0]
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for _, hit := range *hits {
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if hit.X < 0 || hit.X >= w || hit.Y < 0 || hit.Y >= h {
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panic(fmt.Sprintf("game: hit at %d,%d is off the %d×%d box", hit.X, hit.Y, w, h))
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}
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if hit.at.IsZero() {
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hit.at = now
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}
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if now.Sub(hit.at) < life {
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live = append(live, hit)
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}
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}
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*hits = live
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shown := append([]Hit(nil), live...)
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parts := make([]string, len(shown))
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for i, hit := range shown {
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parts[i] = strconv.Itoa(hit.Value)
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if hit.Crit {
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parts[i] += "!"
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}
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}
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if len(shown) > 0 {
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k.Tick(c, 20)
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}
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return ui.Box(c).Role(ui.RoleImage).Label(text).Description(strings.Join(parts, ", ")).Size(k.D(w), k.D(h)).Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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// Numbers wider than the box are cut at it.
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g.Clip(0, 0, w, h, func() { numbers(g, k, shown, now, w, h) })
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})
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}
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// numbers draws live hits, risen and dissolved by age.
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func numbers(g pixel.Canvas, k pixel.Kit, shown []Hit, now time.Time, w, h int) {
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for _, hit := range shown {
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t := float64(now.Sub(hit.at)) / float64(life)
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ink, sc, s := pixel.Ink, 1, strconv.Itoa(hit.Value)
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if hit.Crit {
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ink, sc, s = pixel.Warn, 2, s+"!"
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}
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// Wide or high numbers are pushed back inside the box.
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tw, th := pixel.Measure(s)*sc, pixel.LineHeight*sc
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x, y := max(0, min(w-tw, hit.X-tw/2)), max(0, min(h-th, hit.Y-th/2))
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// It rises 12 dots and dissolves; reduced, it holds still.
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if k.Reduce() {
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g.Text(x, y, s, ink, sc)
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continue
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}
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level := 16
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if t > 0.5 {
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level = int(16 * (1 - t) * 2)
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}
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g.TextVeil(x, max(0, y-int(12*t)), s, ink, level, sc)
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}
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}
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