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Merge pull request #313 from marc921/add-vec-squared-len 

feat(Vec): add squared len method
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Allen Ray 2023-03-10 09:11:03 -05:00 committed by GitHub
parent 069cc4e011 ab135a4965
commit a9abe2ebb7
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vector.go
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@ -128,6 +128,11 @@ func (u Vec) Len() float64 {
return math.Hypot(u.X, u.Y) return math.Hypot(u.X, u.Y)
} }
// SqLen returns the squared length of the vector u (faster to compute than Len).
func (u Vec) SqLen() float64 {
return u.X*u.X + u.Y*u.Y
}
// Angle returns the angle between the vector u and the x-axis. The result is in range [-Pi, Pi]. // Angle returns the angle between the vector u and the x-axis. The result is in range [-Pi, Pi].
func (u Vec) Angle() float64 { func (u Vec) Angle() float64 {
return math.Atan2(u.Y, u.X) return math.Atan2(u.Y, u.X)