From 6259f1b47ffce577ce6105612604152868bec035 Mon Sep 17 00:00:00 2001
From: Ben Visness <bvisness@gmail.com>
Date: Sat, 20 Aug 2016 19:33:36 -0500
Subject: [PATCH] Add ability to construct vec4 from vec3 and float

This is very useful for applications using homogeneous coordinates, since I can
take a vec3 representing a position or normal, and construct the appropriate
vec4 in homogeneous coordinates.
---
 HandmadeMath.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/HandmadeMath.h b/HandmadeMath.h
index 8b04942..713f5fd 100644
--- a/HandmadeMath.h
+++ b/HandmadeMath.h
@@ -295,6 +295,7 @@ HMMDEF hmm_vec3 HMM_Vec3(float X, float Y, float Z);
 HMMDEF hmm_vec3 HMM_Vec3i(int X, int Y, int Z);
 HMMDEF hmm_vec4 HMM_Vec4(float X, float Y, float Z, float W);
 HMMDEF hmm_vec4 HMM_Vec4i(int X, int Y, int Z, int W);
+HMMDEF hmm_vec4 HMM_Vec4v(hmm_vec3 Vector, float W);
 
 HMMDEF hmm_vec2 HMM_AddVec2(hmm_vec2 Left, hmm_vec2 Right);
 HMMDEF hmm_vec3 HMM_AddVec3(hmm_vec3 Left, hmm_vec3 Right);
@@ -621,6 +622,17 @@ HMM_Vec4i(int X, int Y, int Z, int W)
     return (Result);
 }
 
+HINLINE hmm_vec4
+HMM_Vec4v(hmm_vec3 Vector, float W)
+{
+    hmm_vec4 Result;
+
+    Result.XYZ = Vector;
+    Result.W = W;
+
+    return (Result);
+}
+
 HINLINE hmm_vec2
 HMM_AddVec2(hmm_vec2 Left, hmm_vec2 Right)
 {