move typedefs to twn_types.h, specify that twn_vec.h is C user only, remove Vec2sh

include/twn_types.h

@@ -39,4 +39,42 @@ typedef struct Matrix4 {
     Vec4 row[4];
 } Matrix4;
 
+
+/* a point in some space (integer) */
+typedef struct Vec2i {
+_Alignas(8)
+    int32_t x;
+    int32_t y;
+} Vec2i;
+
+
+/* a point in some space (floating point) */
+typedef struct Vec2 {
+_Alignas(8)
+    float x;
+    float y;
+} Vec2;
+
+
+/* a point in some three dimension space (floating point) */
+/* y goes up, x goes to the right */
+typedef struct Vec3 {
+_Alignas(16)
+    float x;
+    float y;
+    float z;
+} Vec3;
+
+
+/* a point in some three dimension space (floating point) */
+/* y goes up, x goes to the right */
+typedef struct Vec4 {
+_Alignas(16)
+    float x;
+    float y;
+    float z;
+    float w;
+} Vec4;
+
+
 #endif

include/twn_vec.h

@@ -1,55 +1,14 @@
 #ifndef TWN_VEC_H
 #define TWN_VEC_H
 
+/* vector ops for C users */
+
+#include "twn_types.h"
+
 #include <stdint.h>
 #include <math.h>
 
 
-/* a point in some space (integer) */
-typedef struct Vec2i {
-_Alignas(8)
-    int32_t x;
-    int32_t y;
-} Vec2i;
-
-
-/* a point in some space (floating point) */
-typedef struct Vec2 {
-_Alignas(8)
-    float x;
-    float y;
-} Vec2;
-
-
-/* a point in some three dimension space (floating point) */
-/* y goes up, x goes to the right */
-typedef struct Vec3 {
-_Alignas(16)
-    float x;
-    float y;
-    float z;
-} Vec3;
-
-
-/* a point in some three dimension space (floating point) */
-/* y goes up, x goes to the right */
-typedef struct Vec4 {
-_Alignas(16)
-    float x;
-    float y;
-    float z;
-    float w;
-} Vec4;
-
-
-/* a point in some space (short) */
-typedef struct Vec2sh {
-_Alignas(4)
-    int16_t x;
-    int16_t y;
-} Vec2sh;
-
-
 /* aren't macros to prevent double evaluation with side effects */
 /* maybe could be inlined? i hope LTO will resolve this */
 static inline Vec2 vec2_from_vec2i(Vec2i vec) {
@@ -59,13 +18,6 @@ static inline Vec2 vec2_from_vec2i(Vec2i vec) {
     };
 }
 
-static inline Vec2 vec2_from_vec2sh(Vec2sh vec) {
-    return (Vec2) {
-        .x = (float)vec.x,
-        .y = (float)vec.y,
-    };
-}
-
 static inline Vec3 vec3_add(Vec3 a, Vec3 b) {
     return (Vec3) { a.x + b.x, a.y + b.y, a.z + b.z };
 }
@@ -133,7 +85,6 @@ static inline Vec3 vec3_rotate(Vec3 v, float angle, Vec3 axis) {
 
 #define m_vec2_from(p_any_vec2) (_Generic((p_any_vec2),       \
                                     Vec2i:  vec2_from_vec2i,  \
-                                    Vec2sh: vec2_from_vec2sh  \
                                 )(p_any_vec2))
 
 #define m_vec_sub(p_any_vec0, p_any_vec1) (_Generic((p_any_vec0),   \