geometry

Documentation

Index

• func CalculateRotationAngle(pA, pB, qA, qB Point) float64
• type Point
  • func TransformPointByOnePointAndRotationAngle(pA, qA, qB Point, angleDeg float64) (pB Point)
• type Rectangle
  • func Rect(x0, y0, x1, y1 float64) Rectangle

Functions

func CalculateRotationAngle

func CalculateRotationAngle(pA, pB, qA, qB Point) float64

已知两点在两平面坐标系中的坐标，求坐标系夹角,A旋转到B的度数，逆时针>0 CalculateRotationAngle

Types

type Point

type Point struct {
	X float64
	Y float64
}

Point 结构体用于表示一个点

func TransformPointByOnePointAndRotationAngle

func TransformPointByOnePointAndRotationAngle(pA, qA, qB Point, angleDeg float64) (pB Point)

TransformPointByOnePointAndRotationAngle transforms a point from coordinate system a2 to a1 在数学和计算机图形学中，旋转角度的正负通常遵循右手定则。默认情况下，顺时针方向被认为是负的，而逆时针方向被认为是正的。 O2相对于O1旋转度数

type Rectangle

type Rectangle struct {
	Min, Max Point
}

func Rect

func Rect(x0, y0, x1, y1 float64) Rectangle