Initial commit

math/direction.go

@@ -0,0 +1,26 @@
+package math
+
+import (
+	stdmath "math"
+)
+
+type Direction float64
+
+func (d *Direction) Set(v float64) {
+	*d = Direction(v)
+}
+
+func (d Direction) Get() float64 {
+	return float64(d)
+}
+
+func (d Direction) ForwardVector() Vec2f {
+	return Vec2f{
+		X: stdmath.Cos(float64(d)),
+		Y: stdmath.Sin(float64(d)),
+	}
+}
+
+func (d *Direction) Rotate(delta float64) {
+	*d += Direction(delta)
+}