94 lines
2.8 KiB
Go
94 lines
2.8 KiB
Go
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package item
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import (
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"github.com/df-mc/dragonfly/server/block/cube"
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"github.com/df-mc/dragonfly/server/world"
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"github.com/df-mc/dragonfly/server/world/sound"
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"github.com/go-gl/mathgl/mgl64"
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"math/rand/v2"
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"time"
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)
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// Firework is an item (and entity) used for creating decorative explosions, boosting when flying with elytra, and
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// loading into a crossbow as ammunition.
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type Firework struct {
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// Duration is the flight duration of the firework.
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Duration time.Duration
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// Explosions is the list of explosions the firework should create when launched.
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Explosions []FireworkExplosion
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}
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// Use ...
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func (f Firework) Use(tx *world.Tx, user User, ctx *UseContext) bool {
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if g, ok := user.(interface {
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Gliding() bool
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}); !ok || !g.Gliding() {
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return false
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}
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pos := user.Position()
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tx.PlaySound(pos, sound.FireworkLaunch{})
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create := tx.World().EntityRegistry().Config().Firework
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opts := world.EntitySpawnOpts{Position: pos, Rotation: user.Rotation()}
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tx.AddEntity(create(opts, f, user, 1.15, 0.04, true))
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ctx.SubtractFromCount(1)
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return true
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}
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// UseOnBlock ...
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func (f Firework) UseOnBlock(pos cube.Pos, _ cube.Face, clickPos mgl64.Vec3, tx *world.Tx, user User, ctx *UseContext) bool {
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fpos := pos.Vec3().Add(clickPos)
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create := tx.World().EntityRegistry().Config().Firework
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opts := world.EntitySpawnOpts{Position: fpos, Rotation: cube.Rotation{rand.Float64() * 360, 90}}
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tx.AddEntity(create(opts, f, user, 1.15, 0.04, false))
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tx.PlaySound(fpos, sound.FireworkLaunch{})
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ctx.SubtractFromCount(1)
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return true
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}
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// EncodeNBT ...
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func (f Firework) EncodeNBT() map[string]any {
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explosions := make([]any, 0, len(f.Explosions))
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for _, explosion := range f.Explosions {
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explosions = append(explosions, explosion.EncodeNBT())
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}
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return map[string]any{"Fireworks": map[string]any{
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"Explosions": explosions,
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"Flight": uint8((f.Duration/10 - time.Millisecond*50).Milliseconds() / 50),
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}}
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}
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// DecodeNBT ...
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func (f Firework) DecodeNBT(data map[string]any) any {
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if fireworks, ok := data["Fireworks"].(map[string]any); ok {
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if explosions, ok := fireworks["Explosions"].([]any); ok {
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f.Explosions = make([]FireworkExplosion, len(explosions))
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for i, explosion := range f.Explosions {
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f.Explosions[i] = explosion.DecodeNBT(explosions[i].(map[string]any)).(FireworkExplosion)
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}
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}
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if durationTicks, ok := fireworks["Flight"].(uint8); ok {
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f.Duration = (time.Duration(durationTicks)*time.Millisecond*50 + time.Millisecond*50) * 10
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}
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}
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return f
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}
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// RandomisedDuration returns the randomised flight duration of the firework.
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func (f Firework) RandomisedDuration() time.Duration {
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return f.Duration + time.Duration(rand.IntN(int(time.Millisecond*600)))
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}
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// OffHand ...
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func (Firework) OffHand() bool {
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return true
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}
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// EncodeItem ...
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func (Firework) EncodeItem() (name string, meta int16) {
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return "minecraft:firework_rocket", 0
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}
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