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Add 2D Vector rotation by radians operation #49

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merged 3 commits into from
Oct 10, 2023
Merged

Add 2D Vector rotation by radians operation #49

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4fd3684
Add 2D Vector rotation by radians operation
sathuhebbar Oct 9, 2023
82998aa
Minor change, add word "anticlockwise" to rotation
sathuhebbar Oct 9, 2023
343ecc9
Refactoring return types and comments
sathuhebbar Oct 10, 2023
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25 changes: 25 additions & 0 deletions rotateRad.go
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Original file line number Diff line number Diff line change
@@ -0,0 +1,25 @@
package govec

import (
"math"
)

// RotateRad returns the vector obtained by rotating
// the specified 2D vector counterclockwise by the angle
// specified in radians.
func (v V2F[T]) RotateRad(angleRad float64) V2F[T] {
return V2F[T]{
X: T(float64(v.X)*math.Cos(angleRad) - float64(v.Y)*math.Sin(angleRad)),
Y: T(float64(v.X)*math.Sin(angleRad) + float64(v.Y)*math.Cos(angleRad)),
}
}

// RotateRad returns the vector obtained by rotating
// the specified 2D vector counterclockwise by the angle
// specified in radians.
func (v V2I[T]) RotateRad(angleRad float64) V2F[float64] {
return V2F[float64]{
X: float64(v.X)*math.Cos(angleRad) - float64(v.Y)*math.Sin(angleRad),
Y: float64(v.X)*math.Sin(angleRad) + float64(v.Y)*math.Cos(angleRad),
}
}