46 lines
858 B
Go
46 lines
858 B
Go
package card
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import (
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"fmt"
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"git.tuxpa.in/a/card_id/common/data"
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"lukechampine.com/frand"
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)
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// a table is a collection of results
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type Deck struct {
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Cards []Card
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TotalProbability float64
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BonusLifeProbability float64
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}
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func NewDeck(r data.Results) *Deck {
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out := &Deck{}
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out.BonusLifeProbability = 0.005
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out.Cards = make([]Card, 0, len(r))
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for _, v := range r {
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out.Cards = append(out.Cards, new(Card).FromResult(v))
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out.TotalProbability = out.TotalProbability + v.Rate
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}
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return out
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}
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func (t *Deck) Draw() Card {
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selector := frand.Float64() * t.TotalProbability
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sofar := 0.0
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for _, v := range t.Cards {
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sofar = sofar + v.Rate
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if sofar >= selector-0.000000001 {
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return v.CopyWithBonus(t.BonusLifeProbability)
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}
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}
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return Card{
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Id: 0,
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Name: fmt.Sprintf("please report this bug: %v", selector),
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Rate: selector,
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}
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}
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