util

func Clamp ¶

func Clamp(num, min, max float64) float64

func Lerp ¶

func Lerp(fac float64, v1, v2 r3.Vec) r3.Vec

Lerp does a linear interpolation of two vectors using a provided factor. It is expected to operate on the factor range of [0.0, 1.0], but does not check for inclusion. May return unexpected results when the factor is out of the expected range

func RandomUnitVec3 ¶

func RandomUnitVec3() r3.Vec

func RandomV3InHemisphere ¶

func RandomV3InHemisphere(nor r3.Vec) r3.Vec

func RandomVec3 ¶

func RandomVec3() r3.Vec

func RandomVec3Between ¶

func RandomVec3Between(min, max float64) r3.Vec

func RandomVec3Disk ¶

func RandomVec3Disk() r3.Vec

func RealRand ¶

func RealRand() float64

func RealRandRange ¶

func RealRandRange(min, max float64) float64

func Vec3Dot ¶

func Vec3Dot(v1, v2 r3.Vec) float64

Vec3Dot computes the dot product of two vectors

func Vec3Length ¶

func Vec3Length(v r3.Vec) float64

func Vec3LengthSquared ¶

func Vec3LengthSquared(v r3.Vec) float64

func Vec3Mul ¶

func Vec3Mul(v1, v2 r3.Vec) r3.Vec

func VecToRGBA ¶

func VecToRGBA(vec r3.Vec) color.RGBA

VecToRGBA scales the input vector by 255 and then returns a new RGBA color