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|
package action
import (
"fmt"
"math/rand"
"os"
"path/filepath"
"gopkg.in/yaml.v3"
)
func SuccessChance(cfg SuccessFormula, level int, requiredLevel int) float64 {
chance := cfg.Base + float64(level-requiredLevel)*cfg.PerLevel
if chance > cfg.Cap {
chance = cfg.Cap
}
if chance < 0 {
chance = 0
}
return chance
}
func LoadDropTable(dataDir, id string) (*DropTableDef, error) {
path := filepath.Join(dataDir, "drops", id+".yaml")
data, err := os.ReadFile(path)
if err != nil {
return nil, fmt.Errorf("read drop table %s: %w", id, err)
}
var dt DropTableDef
if err := yaml.Unmarshal(data, &dt); err != nil {
return nil, fmt.Errorf("parse drop table %s: %w", id, err)
}
return &dt, nil
}
func ResolveDrop(dataDir string, drops []DropEntry) *DropEntry {
if len(drops) == 0 {
return nil
}
total := 0
for _, d := range drops {
total += d.Weight
}
if total <= 0 {
return nil
}
roll := rand.Intn(total)
cumulative := 0
for i := range drops {
cumulative += drops[i].Weight
if roll < cumulative {
if drops[i].Table != "" {
sub, err := LoadDropTable(dataDir, drops[i].Table)
if err == nil {
if resolved := ResolveDrop(dataDir, sub.Drops); resolved != nil {
qty := drops[i].Quantity
if qty <= 0 {
qty = resolved.Quantity
}
if qty <= 0 {
qty = 1
}
return &DropEntry{
ItemID: resolved.ItemID,
Quantity: qty,
Depletes: drops[i].Depletes,
Message: drops[i].Message,
}
}
}
return nil
}
return &drops[i]
}
}
return &drops[0]
}
|
