s_cherry_e/sr/internal/extend/rand/battle.go

package rand

const (
	dn9301    = int32(9301)
	dn49297   = int32(49297)
	dn233280  = int32(233280)
	dn2332800 = float64(233280)

	zero = float64(0)
	one  = float64(1)
)

type Battle struct {
	seed       int32
	originSeed int32
}

func (p *Battle) Seed(seed int32) {
	p.seed = seed
	p.originSeed = seed
}

func (p *Battle) Range01() float64 {
	return p.Range(zero, one)
}

func (p *Battle) Range(minVal, maxVal float64) float64 {
	p.seed = (p.seed*dn9301 + dn49297) % dn233280
	return minVal + (float64(p.seed) / dn2332800 * (maxVal - minVal))
}