implement movement

Signed-off-by: Lizzy Fleckenstein <lizzy@vlhl.dev>

1 files changed, 5 insertions, 1 deletions

diff --git a/include/vec.h b/include/vec.h
index ce1b921..d2d9e31 100644
--- a/include/vec.h
+++ b/include/vec.h
@@ -9,7 +9,7 @@
 #include <stdbool.h>
 #include "ser.h"
 
-#define VECFN static __attribute__((unused))
+#define VECFN [[maybe_unused]] static
 
 #define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
 #define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
@@ -22,12 +22,16 @@ typedef struct { S x; S y; } V; \
 typedef struct { V pos; uvec2 size; } B; \
 VECFN V V##_add(V a, V b) { return (V) { a.x+b.x, a.y+b.y }; } \
 VECFN V V##_sub(V a, V b) { return (V) { a.x-b.x, a.y-b.y }; } \
+VECFN V V##_mul(V v, S s) { return (V) { v.x*s, v.y*s }; } \
+VECFN V V##_div(V v, S s) { return (V) { v.x/s, v.y/s }; } \
 VECFN uvec2 V##_chksub(V a, V b) { return (uvec2) { CHKSUB(a.x, b.x), CHKSUB(a.y, b.y) }; } \
 VECFN V V##_min(V a, V b) { return (V) { MIN(a.x, b.x), MIN(a.y, b.y) }; } \
 VECFN V V##_max(V a, V b) { return (V) { MAX(a.x, b.x), MAX(a.y, b.y) }; } \
 VECFN bool V##_eq(V a, V b) { return a.x == b.x && a.y == b.y; } \
 VECFN bool V##_le(V a, V b) { return a.x <= b.x && a.y <= b.y; } \
 VECFN bool V##_lt(V a, V b) { return a.x < b.x && a.y < b.y; } \
+VECFN V V##_zero() { return (V) { 0, 0 }; } \
+VECFN bool V##_iszero(V v) { return V##_eq(v, V##_zero()); } \
 VECFN void ser_##V(strbuf *w, V v) { ser_##SER(w, v.x); ser_##SER(w, v.y); } \
 VECFN bool deser_##V(str *r, V *v) { return deser_##SER(r, &v->x) && deser_##SER(r, &v->y); } \
 VECFN void ser_##B(strbuf *w, B b) { ser_##V(w, b.pos); ser_uvec2(w, b.size); } \