63 lines
1.7 KiB
Go
63 lines
1.7 KiB
Go
package geometry
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import (
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"github.com/kercylan98/minotaur/utils/generic"
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"math"
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)
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// Circle 由多个点组成的圆形数据结构
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type Circle[V generic.SignedNumber] struct {
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Shape[V]
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}
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// Radius 获取圆形半径
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func (slf Circle[V]) Radius() V {
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for _, point := range slf.Points() {
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return CalcDistanceWithPoint(slf.Centroid(), point)
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}
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panic("circle without any points")
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}
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// Centroid 获取圆形质心位置
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func (slf Circle[V]) Centroid() Point[V] {
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return CalcRectangleCentroid(slf.Shape)
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}
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// Overlap 与另一个圆是否发生重叠
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func (slf Circle[V]) Overlap(circle Circle[V]) bool {
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return slf.CentroidDistance(circle) < slf.Radius()+circle.Radius()
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}
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// Area 获取圆形面积
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func (slf Circle[V]) Area() V {
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return V(math.Pi * math.Pow(float64(slf.Radius()), 2))
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}
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// Length 获取圆的周长
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func (slf Circle[V]) Length() V {
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return V(2 * math.Pi * float64(slf.Radius()))
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}
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// CentroidDistance 计算与另一个圆的质心距离
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func (slf Circle[V]) CentroidDistance(circle Circle[V]) V {
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return CalcCircleCentroidDistance(slf, circle)
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}
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// NewCircle 通过传入圆的半径和需要的点数量，生成一个圆
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func NewCircle[V generic.SignedNumber](radius V, points int) Circle[V] {
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angle := 2.0 * math.Pi / float64(points)
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var shape = make(Shape[V], points)
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for i := 0; i < points; i++ {
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curAngle := float64(i) * angle
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x := radius * V(math.Cos(curAngle))
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y := radius * V(math.Sin(curAngle))
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shape = append(shape, NewPoint(x, y))
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}
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return shape.ToCircle()
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}
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// CalcCircleCentroidDistance 计算两个圆质心距离
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func CalcCircleCentroidDistance[V generic.SignedNumber](circle1, circle2 Circle[V]) V {
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return CalcDistanceWithPoint(circle1.Centroid(), circle2.Centroid())
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}
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