fastsqrt/fastsqrt.go

@@ -1,27 +0,0 @@
-package fastsqrt
-
-import "math"
-
-const magic32 = 0x5F375A86
-
-func FastInvSqrt32(n float32) float32 {
-	// If n is negative return NaN
-	if n < 0 {
-		return float32(math.NaN())
-	} // n2 and th are for one iteration of Newton's method later
-	n2, th := n*0.5, float32(1.5) // Use math.Float32bits to represent the float32, n, as
-	// an uint32 without modification.
-	b := math.Float32bits(n) // Use the new uint32 view of the float32 to shift the bits
-	// of the float32 1 to the right, chopping off 1 bit from
-	// the fraction part of the float32.
-	b = magic32 - (b >> 1) // Use math.Float32frombits to convert the uint32 bits back
-	// into their float32 representation, again no actual change
-	// in the bits, just a change in how we treat them in memory.
-	// f is now our answer of 1 / sqrt(n)
-	f := math.Float32frombits(b) // Perform one iteration of Newton's method on f to improve
-	// accuracy
-	f *= th - (n2 * f * f)
-
-	// And return our fast inverse square root result
-	return f
-}

main.go

@@ -44,8 +44,6 @@ func main() {
 			fAY := -float32(AY) * config.Config.Gain * float32(scale)
 			fBX := float32(BX) * config.Config.Gain * float32(scale)
 			fBY := -float32(BY) * config.Config.Gain * float32(scale)
-			//inv := fastsqrt.FastInvSqrt32((fBX-fAX)*(fBX-fAX) + (fBY-fBY)*(fBY-fBY))
-			//colorAdjusted := color.RGBA{config.AccentColor.R, config.AccentColor.G, config.AccentColor.B, uint8(255 * inv * config.Config.LineOpacity)}
 			rl.DrawLineEx(rl.NewVector2(float32(config.Config.WindowWidth/2)+fAX, float32(config.Config.WindowWidth/2)+fAY), rl.NewVector2(float32(config.Config.WindowWidth/2)+fBX, float32(config.Config.WindowWidth/2)+fBY), config.Config.LineThickness, config.AccentColor)
 			AX = BX
 			AY = BY