37 lines
734 B
Go
37 lines
734 B
Go
package game
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import "math"
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// Vector desribes a 3D vector
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type Vector struct {
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X float64 `json:"x"`
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Y float64 `json:"y"`
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}
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// Add adds one vector to another
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func (v *Vector) Add(v2 Vector) {
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v.X += v2.X
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v.Y += v2.Y
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}
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// Added calculates a new vector
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func (v Vector) Added(v2 Vector) Vector {
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v.Add(v2)
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return v
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}
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// Negated returns a negated vector
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func (v Vector) Negated() Vector {
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return Vector{-v.X, -v.Y}
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}
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// Length returns the length of the vector
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func (v Vector) Length() float64 {
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return math.Sqrt(v.X*v.X + v.Y*v.Y)
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}
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// Distance returns the distance between two vectors
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func (v Vector) Distance(v2 Vector) float64 {
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// Negate the two vectors and calciate the length
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return v.Added(v2.Negated()).Length()
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}
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