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Quadratic speedup.

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treeform 2022-06-29 23:48:07 -07:00
parent ecb1a76b41
commit af84081817
1 changed files with 4 additions and 3 deletions
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7
src/pixie/paths.nim
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@ -723,9 +723,10 @@ proc commandsToShapes(
proc addQuadratic(shape: var Polygon, at, ctrl, to: Vec2) = proc addQuadratic(shape: var Polygon, at, ctrl, to: Vec2) =
## Adds quadratic segments to shape. ## Adds quadratic segments to shape.
proc compute(at, ctrl, to: Vec2, t: float32): Vec2 {.inline.} = proc compute(at, ctrl, to: Vec2, t: float32): Vec2 {.inline.} =
pow(1 - t, 2) * at + let t2 = t*t
2 * (1 - t) * t * ctrl + at * (t2 - 2*t + 1) +
pow(t, 2) * to ctrl * (-2*t2 + 2*t) +
to * t2
var var
t: float32 # Where we are at on the curve from [0, 1] t: float32 # Where we are at on the curve from [0, 1]