math

import "github.com/rfwlab/rfw/v2/math"

Vector and matrix math utilities.

Vec2

type Vec2 struct{ X, Y float32 }

Method	Description
`Add(Vec2) Vec2`	Component-wise add
`Sub(Vec2) Vec2`	Component-wise subtract
`Mul(f float32) Vec2`	Scale by factor
`Dot(Vec2) float32`	Dot product
`Length() float32`	Vector length
`Normalize() Vec2`	Unit vector
`Distance(Vec2) float32`	Distance to other

Vec3

type Vec3 struct{ X, Y, Z float32 }

Method	Description
`Add(Vec3) Vec3`	Component-wise add
`Sub(Vec3) Vec3`	Component-wise subtract
`Mul(f float32) Vec3`	Scale by factor
`Dot(Vec3) float32`	Dot product
`Cross(Vec3) Vec3`	Cross product
`Length() float32`	Vector length
`Normalize() Vec3`	Unit vector

Mat4

type Mat4 [16]float32  // Column-major 4x4 matrix

Function	Description
`Identity() Mat4`	Identity matrix
`Translation(Vec3) Mat4`	Translation matrix
`Scale(Vec3) Mat4`	Scale matrix
`RotationX/Y/Z(float32) Mat4`	Rotation matrices
`Perspective(...) Mat4`	Perspective projection
`LookAt(...) Mat4`	View matrix

Quat

type Quat struct{ X, Y, Z, W float32 }

Quaternion for 3D rotation.

Method	Description
`Identity() Quat`	Identity quaternion
`FromAxisAngle(Vec3, float32) Quat`	From axis-angle
`Mul(Quat) Quat`	Multiply quaternions
`Slerp(Quat, float32) Quat`	Spherical interpolation
`ToMat4() Mat4`	Convert to matrix

Additional

Function	Description
`Clamp(v, min, max float32) float32`	Clamp value
`Lerp(a, b, t float32) float32`	Linear interpolation
`Rand() float32`	Random 0-1
`Randn() float32`	Random normal distribution