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cleaning up bezier formula

This commit is contained in:
Jakub Dóka 2020-11-05 19:19:58 +01:00
parent 8bf0b74a9d
commit 1f109e3391
1 changed files with 5 additions and 4 deletions
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9
geometry.go
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@ -1158,9 +1158,10 @@ func (b Bezier) Point(t float64) Vec {
}
inv := 1.0 - t
c, d, e, f := inv*inv*inv, inv*inv*t*3.0, inv*t*t*3.0, t*t*t
return b.Start.Scaled(inv * inv * inv).
Add(b.StartHandle.Scaled(inv * inv * t * 3.0)).
Add(b.EndHandle.Scaled(inv * t * t * 3.0).
Add(b.End.Scaled(t * t * t)))
return V(
b.Start.X*c+b.StartHandle.X*d+b.EndHandle.X*e+b.End.X*f,
b.Start.Y*c+b.StartHandle.Y*d+b.EndHandle.Y*e+b.End.Y*f,
)
}