aligned for vectorization commor primitives, uint32_t cast for color comparison in batch collection

src/util.h

@@ -70,6 +70,7 @@ bool strends(const char *str, const char *suffix);
 
 /* 32-bit color data */
 typedef struct color {
+_Alignas(4)
     uint8_t r;
     uint8_t g;
     uint8_t b;
@@ -85,14 +86,19 @@ typedef struct vec2 {
 
 /* a point in some space (floating point) */
 typedef struct fvec2 {
-    float x, y;
+_Alignas(8)
+    float x;
+    float y;
 } 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;
+_Alignas(8)
+    float x;
+    float y;
+    float z;
 } t_fvec3;
 
 
@@ -111,8 +117,11 @@ typedef struct rect {
 
 /* a rectangle with the origin at the upper left (floating point) */
 typedef struct frect {
-    float x, y;
-    float w, h;
+_Alignas(16)
+    float x;
+    float y;
+    float w;
+    float h;
 } t_frect;