diff --git a/HandmadeMath.h b/HandmadeMath.h
index 6cf1cd1..912b2ad 100644
--- a/HandmadeMath.h
+++ b/HandmadeMath.h
@@ -257,6 +257,7 @@ HMMDEF hmm_vec4 HMM_DivideVec4(hmm_vec4 Left, hmm_vec4 Right);
 HMMDEF hmm_mat4 HMM_Mat4(void);
 HMMDEF hmm_mat4 HMM_Mat4d(float Diagonal);
 HMMDEF hmm_mat4 HMM_MultiplyMat4(hmm_mat4 Left, hmm_mat4 Right);
+HMMDEF hmm_vec4 HMM_MultiplyMat4ByVec4(hmm_mat4 Matrix, hmm_vec4 Vector);
 
 HMMDEF hmm_mat4 HMM_Orthographic(float Left, float Right, float Bottom, float Top, float Near, float Far);
 HMMDEF hmm_mat4 HMM_Perspective(float FOV, float AspectRatio, float Near, float Far);
@@ -284,6 +285,7 @@ HMMDEF hmm_vec2 HMM_Multiply(int X, int Y);
 HMMDEF hmm_vec3 HMM_Multiply(int X, int Y, int Z);
 HMMDEF hmm_vec4 HMM_Multiply(int X, int Y, int Z, int W);
 HMMDEF hmm_mat4 HMM_Multiply(hmm_mat4 Left, hmm_mat4 Right);
+HMMDEF hmm_vec4 HMM_Multiply(hmm_mat4 Matrix, hmm_vec4 Vector);
 
 HMMDEF hmm_vec2 HMM_Divide(int X, int Y);
 HMMDEF hmm_vec3 HMM_Divide(int X, int Y, int Z);
@@ -305,6 +307,8 @@ HMMDEF hmm_mat4 operator*(hmm_mat4 Left, hmm_mat4 Right);
 HMMDEF hmm_vec3 operator*(hmm_vec3 Left, float Right);
 HMMDEF hmm_vec2 operator*(hmm_vec2 Left, float Right);
 
+HMMDEF hmm_vec4 operator*(hmm_mat4 Matrix, hmm_vec4 Vector);
+
 HMMDEF hmm_vec2 operator/(hmm_vec2 Left, hmm_vec2 Right);
 HMMDEF hmm_vec3 operator/(hmm_vec3 Left, hmm_vec3 Right);
 HMMDEF hmm_vec4 operator/(hmm_vec4 Left, hmm_vec4 Right);
@@ -708,6 +712,26 @@ HMM_MultiplyMat4(hmm_mat4 Left, hmm_mat4 Right)
     return (Result);
 }
 
+hmm_vec4
+HMM_MultiplyMat4ByVec4(hmm_mat4 Matrix, hmm_vec4 Vector)
+{
+    hmm_vec4 Result = HMM_Vec4(0.0f, 0.0f, 0.0f, 0.0f);
+    
+    int Rows, Columns;
+    for(Rows = 0; Rows < 4; ++Rows)
+    {
+        float Sum = 0;
+        for(Columns = 0; Columns < 4; ++Columns)
+        {
+            Sum += Matrix.Elements[Rows][Columns] * Vector.Elements[Columns];
+        }
+        
+        Result.Elements[Rows] = Sum;
+    }
+    
+    return (Result);
+}
+
 hmm_mat4
 HMM_Orthographic(float Left, float Right, float Bottom, float Top, float Near, float Far)
 {
@@ -896,6 +920,14 @@ Multiply(hmm_mat4 Left, hmm_mat4 Right)
     return (Result);
 }
 
+HINLINE hmm_vec4
+Multiply(hmm_mat4 Matrix, hmm_vec4 Vector)
+{
+    hmm_vec4 Result = HMM_MultiplyMat4ByVec4(Matrix, Vector);
+    
+    return (Result);
+}
+
 HINLINE hmm_vec2
 Divide(hmm_vec2 Left, hmm_vec2 Right)
 {
@@ -1023,6 +1055,14 @@ operator*(hmm_mat4 Left, hmm_mat4 Right)
     return (Result);
 }
 
+HINLINE hmm_vec4
+operator*(hmm_mat4 Matrix, hmm_vec4 Vector)
+{
+    hmm_vec4 Result = Multiply(Matrix, Vector);
+    
+    return (Result);
+}
+
 HINLINE hmm_vec2
 operator/(hmm_vec2 Left, hmm_vec2 Right)
 {