75 lines
1.4 KiB
Go
75 lines
1.4 KiB
Go
package advmath
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import (
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"fmt"
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"math"
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)
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type Vec2[N Real] struct {
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x N
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y N
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}
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func V2[N Real](x, y N) Vec[N, Vec2[N]] {
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return Vec2[N]{x, y}
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}
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func (v Vec2[N]) X() N {
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return v.x
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}
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func (v Vec2[N]) Y() N {
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return v.y
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}
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func (v Vec2[N]) Z() N {
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return 0
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}
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func (v Vec2[N]) W() N {
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return 0
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}
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func (v Vec2[N]) Add(o Vec[N, Vec2[N]]) Vec[N, Vec2[N]] {
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return Vec2[N]{v.X() + o.X(), v.Y() + o.Y()}
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}
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func (v Vec2[N]) Sub(o Vec[N, Vec2[N]]) Vec[N, Vec2[N]] {
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return Vec2[N]{v.X() - o.X(), v.Y() - o.Y()}
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}
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func (v Vec2[N]) Mul(o Vec[N, Vec2[N]]) Vec[N, Vec2[N]] {
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return Vec2[N]{v.X() * o.X(), v.Y() * o.Y()}
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}
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func (v Vec2[N]) Div(o Vec[N, Vec2[N]]) Vec[N, Vec2[N]] {
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return Vec2[N]{v.X() / o.X(), v.Y() / o.Y()}
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}
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func (v Vec2[N]) Len() N {
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return N(math.Sqrt(float64(v.X()*v.X() + v.Y()*v.Y())))
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}
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func (v Vec2[N]) Norm() Vec[N, Vec2[N]] {
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l := v.Len()
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return Vec2[N]{v.X() / l, v.Y() / l}
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}
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func (v Vec2[N]) Dot(o Vec[N, Vec2[N]]) N {
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return N(v.X()*o.X() + v.Y()*o.Y())
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}
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func (v Vec2[N]) Lerp(o Vec[N, Vec2[N]], t N) Vec[N, Vec2[N]] {
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t1 := 1 - t
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return v.Mul(V2(t1, t1)).Add(o.Mul(V2(t, t)))
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}
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func (v Vec2[N]) String() string {
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const decimals = 100000
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return fmt.Sprintf("(%g | %g)", math.Round(float64(v.X())*decimals)/decimals, math.Round(float64(v.Y())*decimals)/decimals)
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}
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func (v Vec2[N]) StringPrecise() string {
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return fmt.Sprintf("(%f | %f)", float64(v.X()), float64(v.Y()))
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}
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