diff --git a/src/vec/vec.h b/src/vec/vec.h
index 96dd6c3..3c278a0 100644
--- a/src/vec/vec.h
+++ b/src/vec/vec.h
@@ -5,8 +5,6 @@
 #include "typed_list.h"
 #include <math.h>
 
-#define V3_ELEM_COUNT 3
-
 typedef struct i64x2 V2i;
 struct i64x2 {
   i64 x;
@@ -33,7 +31,7 @@ struct f32x2 {
 
 typedef union f32x3 V3f;
 union f32x3 {
-  f32 elements[V3_ELEM_COUNT];
+  f32 elements[3];
   struct {
     union {
       f32 x;
@@ -50,12 +48,15 @@ union f32x3 {
   };
 };
 
-typedef struct f32x4 V4f;
-struct f32x4 {
-  f32 x;
-  f32 y;
-  f32 z;
-  f32 w;
+typedef union f32x4 V4f;
+union f32x4 {
+  f32 elements[4];
+  struct {
+    f32 x;
+    f32 y;
+    f32 z;
+    f32 w;
+  };
 };
 
 typedef struct u64x3 V3u;
@@ -65,19 +66,25 @@ struct u64x3 {
   u64 z;
 };
 
-typedef struct f32_3x3 M3x3f;
-struct f32_3x3 {
-  V3f row0;
-  V3f row1;
-  V3f row2;
+typedef union f32_3x3 M3x3f;
+union f32_3x3 {
+  V3f rows[3];
+  struct {
+    V3f row0;
+    V3f row1;
+    V3f row2;
+  };
 };
 
-typedef struct f32_4x4 M4x4f;
-struct f32_4x4 {
-  V4f row0;
-  V4f row1;
-  V4f row2;
-  V4f row3;
+typedef union f32_4x4 M4x4f;
+union f32_4x4 {
+  V4f rows[4];
+  struct {
+    V4f row0;
+    V4f row1;
+    V4f row2;
+    V4f row3;
+  };
 };
 
 MAKE_LIST_TYPE(V3f);
@@ -233,6 +240,8 @@ MAKE_LIST_TYPE(V2f);
 
 #define project_vec4(V) ((V3f){.x = V.x / V.w, .y = V.y / V.w, .z = V.z / V.w})
 
+#define mat_access(MAT, i, j) (MAT.rows[i].elements[j])
+
 M4x4f lookat(V3f eye, V3f target, V3f up);
 M4x4f projection(f32 coeff);
 M4x4f viewport(f32 x, f32 y, u64 w, u64 h);