From ff7cc186e7c323245d154e5bcb523fc05abccba4 Mon Sep 17 00:00:00 2001
From: Colby Klein <shakesoda@gmail.com>
Date: Tue, 13 Dec 2016 15:09:38 -0800
Subject: [PATCH] add mat4 * vec3 (implicit w=1)

---
 modules/mat4.lua | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/mat4.lua b/modules/mat4.lua
index 7b87edd..717d84d 100644
--- a/modules/mat4.lua
+++ b/modules/mat4.lua
@@ -819,6 +819,11 @@ end
 
 function mat4_mt.__mul(a, b)
 	assert(mat4.is_mat4(a), "__mul: Wrong argument type for left hand operant. (<cpml.mat4> expected)")
+
+	if vec3.is_vec3(b) then
+		return vec3(mat4.mul_vec4({}, a, { b.x, b.y, b.z, 1 }))
+	end
+
 	assert(mat4.is_mat4(b) or #b == 4, "__mul: Wrong argument type for right hand operant. (<cpml.mat4> or table #4 expected)")
 
 	if mat4.is_mat4(b) then