More vector related features

include/vec.h

@@ -7,10 +7,19 @@ typedef struct Vec
 	float y;
 } Vec;
 
+/* like memcpy but for vectors */
+void vec_cpy(Vec *destination, Vec *source);
+
 /* apply a force on a vector */
 void vec_add(Vec *vector, Vec force);
 
 /* apply the opposite of a force on a vector */
 void vec_sub(Vec *vector, Vec force);
 
+/* multiply a vector by a scale */
+void vec_mul(Vec *vector, float scale);
+
+/* divise a vector by a scale */
+void vec_div(Vec *vector, float scale);
+
 #endif /* _DEF_VEC */

src/main.c

@@ -1,4 +1,4 @@
-w#include <gint/display.h>
+#include <gint/display.h>
 #include <gint/keyboard.h>
 #include <gint/std/string.h>
 
@@ -15,7 +15,7 @@ int main(void)
 
 	/* create player */
 	Player player = {
-		.position = (Vec){32, 32}
+		.position = {32, 32}
 	};
 
 	/* create level */
@@ -28,8 +28,7 @@ int main(void)
 	Camera camera = {
 		.follow = &player.position
 	};
-	camera.position.x = player.position.x;
-	camera.position.y = player.position.y;
+	vec_cpy(&camera.position, &player.position);
 
 	/* main game loop */
 	step_event(&player, &level, &camera);

src/vec.c

@@ -1,5 +1,11 @@
 #include "vec.h"
 
+void vec_cpy(Vec *destination, Vec *source)
+{
+	destination->x = source->x;
+	destination->y = source->y;
+}
+
 void vec_add(Vec *vector, Vec force)
 {
 	vector->x += force.x;
@@ -11,3 +17,15 @@ void vec_sub(Vec *vector, Vec force)
 	vector->x -= force.x;
 	vector->y -= force.y;
 }
+
+void vec_mul(Vec *vector, float scale)
+{
+	vector->x *= scale;
+	vector->y *= scale;
+}
+
+void vec_div(Vec *vector, float scale)
+{
+	vector->x /= scale;
+	vector->y /= scale;
+}