init

tools/math.go

@@ -0,0 +1,58 @@
+package tools
+
+import (
+	"fmt"
+	"math"
+	"strconv"
+)
+
+func Sin(x float64) float64 {
+	return (math.Sin(x * math.Pi / 180.00000))
+}
+
+func Cos(x float64) float64 {
+	return (math.Cos(x * math.Pi / 180.00000))
+}
+
+func Tan(x float64) float64 {
+	return (math.Tan(x * math.Pi / 180.00000))
+}
+
+func ArcSin(x float64) float64 {
+	return (math.Asin(x) / math.Pi * 180.00000)
+}
+
+func ArcCos(x float64) float64 {
+	return (math.Acos(x) / math.Pi * 180.00000)
+}
+
+func ArcTan(x float64) float64 {
+	return (math.Atan(x) / math.Pi * 180.00000)
+}
+
+func FloatRound(f float64, n int) float64 {
+	format := "%." + strconv.Itoa(n) + "f"
+	res, _ := strconv.ParseFloat(fmt.Sprintf(format, f), 64)
+	return res
+}
+
+func Limit360(x float64) float64 {
+	for x > 360 {
+		x -= 360
+	}
+	for x < 0 {
+		x += 360
+	}
+	return x
+}
+
+func FR(f float64) float64 {
+	return FloatRound(f, 14)
+}
+
+func Abs(x int) int {
+	if x < 0 {
+		return -x
+	}
+	return x
+}