From 1bc6e6a7ccc0f6f7c62d9eadd8ec9b71c8645725 Mon Sep 17 00:00:00 2001
From: gingerBill <bill@gingerbill.org>
Date: Sat, 28 Dec 2019 23:07:31 +0000
Subject: [PATCH] Add linalg.vector_lerp, linalg.vector_unlerp

---
 core/math/linalg/linalg.odin | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/core/math/linalg/linalg.odin b/core/math/linalg/linalg.odin
index 2009d478e..8571a1745 100644
--- a/core/math/linalg/linalg.odin
+++ b/core/math/linalg/linalg.odin
@@ -83,6 +83,23 @@ length :: proc{vector_length, quaternion_length};
 length2 :: proc{vector_length2, quaternion_length2};
 
 
+vector_lerp :: proc(x, y, t: $V/[$N]$E) -> V where IS_NUMERIC(E) {
+	s: V;
+	for i in 0..<N {
+		ti := t[i];
+		s[i] = x[i]*(1-ti) + y[i]*ti;
+	}
+	return s;
+}
+
+vector_unlerp :: proc(a, b, x: $V/[$N]$E) -> V where IS_NUMERIC(E) {
+	s: V;
+	for i in 0..<N {
+		ai := a[i];
+		s[i] = (x[i]-ai)/(b[i]-ai);
+	}
+	return s;
+}
 
 vector_sin :: proc(angle: $V/[$N]$E) -> V where IS_NUMERIC(E) {
 	s: V;