Convert to short if

runtime/simplex.go

@@ -59,24 +59,21 @@ func raw2d(seed int, x float64, y float64) float64 {
 	gi2 := perm(seed, ii+1+perm(seed, jj+1)) % 12
 
 	// Calculate the contribution from the three corners
-	t0 := 0.5 - x0*x0 - y0*y0
-	if t0 < 0 {
+	if t0 := 0.5 - x0*x0 - y0*y0; t0 < 0 {
 		n0 = 0.0
 	} else {
 		t0 *= t0
 		n0 = t0 * t0 * dot(grad3[gi0], x0, y0) // (x,y) of grad3 used for 2D gradient
 	}
 
-	t1 := 0.5 - x1*x1 - y1*y1
-	if t1 < 0 {
+	if t1 := 0.5 - x1*x1 - y1*y1; t1 < 0 {
 		n1 = 0.0
 	} else {
 		t1 *= t1
 		n1 = t1 * t1 * dot(grad3[gi1], x1, y1)
 	}
 
-	t2 := 0.5 - x2*x2 - y2*y2
-	if t2 < 0 {
+	if t2 := 0.5 - x2*x2 - y2*y2; t2 < 0 {
 		n2 = 0.0
 	} else {
 		t2 *= t2