From a2b9bb5b5a225762620ce934a84b4c312e1a4871 Mon Sep 17 00:00:00 2001
From: faiface <faiface@ksp.sk>
Date: Tue, 14 Mar 2017 13:27:18 +0100
Subject: [PATCH] add X and Y vector constructors
---
geometry.go | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/geometry.go b/geometry.go
index 3ac5543..e662c63 100644
--- a/geometry.go
+++ b/geometry.go
@@ -34,11 +34,21 @@ import (
// x := u.Unit().Dot(v.Unit())
type Vec complex128
-// V returns a new 2d vector with the given coordinates.
+// V returns a new 2D vector with the given coordinates.
func V(x, y float64) Vec {
return Vec(complex(x, y))
}
+// X returns a 2D vector with coordinates (x, 0).
+func X(x float64) Vec {
+ return V(x, 0)
+}
+
+// Y returns a 2D vector with coordinates (0, y).
+func Y(y float64) Vec {
+ return V(0, y)
+}
+
// String returns the string representation of the vector u.
//
// u := pixel.V(4.5, -1.3)
--
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