feat: add PointDistance

mathutil/mathutil.go

@@ -230,3 +230,13 @@ func RadianToAngle(radian float64) float64 {
 	angle := radian * (180 / math.Pi)
 	return angle
 }
+
+// PointDistance get two points distance.
+// Play: todo
+func PointDistance(x1, y1, x2, y2 float64) float64 {
+	a := x1 - x2
+	b := y1 - y2
+	c := math.Pow(a, 2) + math.Pow(b, 2)
+
+	return math.Sqrt(c)
+}

mathutil/mathutil_exmaple_test.go

@@ -254,3 +254,12 @@ func ExampleRadianToAngle() {
 	// 90
 	// 45
 }
+
+func ExamplePointDistance() {
+	result1 := PointDistance(1, 1, 4, 5)
+
+	fmt.Println(result1)
+
+	// Output:
+	// 5
+}

mathutil/mathutil_test.go

@@ -192,3 +192,11 @@ func TestRadianToAngle(t *testing.T) {
 	assert.Equal(float64(90), result2)
 	assert.Equal(float64(45), result3)
 }
+
+func TestPointDistance(t *testing.T) {
+	assert := internal.NewAssert(t, "TestPointDistance")
+
+	result1 := PointDistance(1, 1, 4, 5)
+
+	assert.Equal(float64(5), result1)
+}