s_cherry_e/sr/internal/extend/math/math.go

package math

import (
	"f1-game/internal/types"
	"math"
)

func Max[E types.Ordered](val E, others ...E) E {
	maxVal := val
	for _, v := range others {
		if v > maxVal {
			maxVal = v
		}
	}
	return maxVal
}

func Min[E types.Ordered](val E, others ...E) E {
	minVal := val
	for _, v := range others {
		if v < minVal {
			minVal = v
		}
	}
	return minVal
}

func Round[E types.FloatType, T types.Number](val E) T {
	return T(math.Round(float64(val)))
}

func Ceil[E types.FloatType, T types.Number](val E) T {
	return T(math.Ceil(float64(val)))
}

func Floor[E types.FloatType, T types.Number](val E) T {
	return T(math.Floor(float64(val)))
}

// GetPointDistance 获取两点之间的距离(格子数)
// 采用odd-q offset坐标系（奇数列向下偏移）
// 使用cube坐标计算六边形网格距离
func GetPointDistance(x1, y1, x2, y2 int32) int32 {
	// 转换为cube坐标
	// cube.x = offset.x
	// cube.z = offset.y - (offset.x + (offset.x&1)) / 2
	// cube.y = -cube.x - cube.z
	c1x := x1
	c1z := y1 - (x1+(x1&1))/2
	c1y := -c1x - c1z

	c2x := x2
	c2z := y2 - (x2+(x2&1))/2
	c2y := -c2x - c2z

	// cube坐标下的距离公式: (|dx| + |dy| + |dz|) / 2
	dx := c1x - c2x
	dy := c1y - c2y
	dz := c1z - c2z
	if dx < 0 {
		dx = -dx
	}
	if dy < 0 {
		dy = -dy
	}
	if dz < 0 {
		dz = -dz
	}

	return (dx + dy + dz) / 2
}