work-in-progress for 3d triangle rendering

src/util.h

@@ -109,6 +109,19 @@ typedef struct fvec2 {
 } t_fvec2;
 
 
+/* a point in some three dimension space (floating point) */
+/* y goes up, x goes to the right */
+typedef struct fvec3 {
+    float x, y, z;
+} t_fvec3;
+
+
+/* a point in some space (short) */
+typedef struct shvec2 {
+    short x, y;
+} t_shvec2;
+
+
 /* decrements an lvalue (which should be an int), stopping at 0 */
 /* meant for tick-based timers in game logic */
 /*