63 lines
1.5 KiB
Swift
63 lines
1.5 KiB
Swift
import Foundation
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public extension FloatingPoint
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{
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@inline(__always) var saturate: Self { min(max(self , 0), 1) }
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@inline(__always) static func lerp(_ a: Self, _ b: Self, _ x: Self) -> Self { a * (1 - x) + b * x }
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@inline(__always) static func deg(fromRad: Self) -> Self { fromRad * (180 / Self.pi) }
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@inline(__always) static func rad(fromDeg: Self) -> Self { fromDeg * (Self.pi / 180) }
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@inline(__always) func smoothStep() -> Self
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{
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let x = self.saturate
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return x * x * (3 - 2 * x)
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}
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func smoothStep(_ a: Self, _ b: Self) -> Self
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{
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let x = self.smoothStep()
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return b * x + a * (1 - x)
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}
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@inline(__always) func smootherStep() -> Self
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{
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let x = self.saturate
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return x * x * x * (x * (x * 6 - 15) + 10)
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}
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func smootherStep(_ a: Self, _ b: Self) -> Self
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{
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let x = self.smootherStep()
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return b * x + a * (1 - x)
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}
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func sqrInterp(_ a: Self, _ b: Self) -> Self
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{
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let x = self.saturate, xx = x * x
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return a * (1 - xx) + b * xx
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}
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func invSqrInterp(_ a: Self, _ b: Self) -> Self
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{
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let x = 1 - self.saturate, xx = x * x
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return a * xx + b * (1 - xx)
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}
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}
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extension FloatingPoint where Self == Double
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{
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@inline(__always) var sine: Self { sin(self) }
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@inline(__always) var cosine: Self { cos(self) }
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@inline(__always) var tangent: Self { tan(self) }
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}
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extension FloatingPoint where Self == Float
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{
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@inline(__always) var sine: Self { sinf(self) }
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@inline(__always) var cosine: Self { cosf(self) }
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@inline(__always) var tangent: Self { tanf(self) }
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}
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