Reorganise files

include/drawing.h

@@ -0,0 +1,55 @@
+#ifndef DRAWING_H
+#define DRAWING_H
+
+#include "aliases/aliases.h"
+#include <SDL_pixels.h>
+#include <SDL_render.h>
+#include <stdbool.h>
+
+#define DEFAULT_ARROWS_CAPACITY 1024
+
+#define init_arrows_default(arrows)                                            \
+  init_arrows_arr(arrows, DEFAULT_ARROWS_CAPACITY)
+#define init_arrows_with_capacity(arrows, capacity)                            \
+  init_arrows_arr(arrows, capacity)
+
+typedef struct colour colour_t;
+struct colour {
+  union {
+    u32 abgr;
+    SDL_Color colour;
+  };
+};
+
+typedef struct point point_t;
+struct point {
+  i32 x;
+  i32 y;
+};
+
+typedef struct vec2 vec2_t;
+struct vec2 {
+  i32 x;
+  i32 y;
+};
+
+typedef struct arrow arrow_t;
+struct arrow {
+  point_t origin;
+  vec2_t direction;
+};
+
+typedef struct arrows arrows_t;
+struct arrows {
+  arrow_t *lines;
+  u64 count;
+  u64 capacity;
+};
+
+bool init_arrows_arr(arrows_t *lines, u64 capacity);
+void add_arrow(arrows_t *lines, arrow_t ln);
+void draw_arrows(SDL_Renderer *renderer, const arrows_t *arrows,
+                 colour_t colour);
+void draw_arrow(SDL_Renderer *renderer, const arrow_t *arrow, colour_t colour);
+
+#endif // !DRAWING_H