Update entry point

main.c

@@ -1,11 +1,27 @@
+#include "SDL_mouse.h"
+#include "aliases/aliases.h"
+#include "drawing.h"
 #include <SDL2/SDL.h>
 #include <SDL2/SDL_events.h>
 #include <SDL2/SDL_render.h>
 #include <SDL2/SDL_video.h>
 #include <stdbool.h>
+#include <stdlib.h>
 
-#define WINDOW_WIDTH 800
-#define WINDOW_HEIGHT 600
+#define WINDOW_WIDTH 1280
+#define WINDOW_HEIGHT 720
+
+typedef struct state state_t;
+struct state {
+  i32 mouse_x;
+  i32 mouse_y;
+  i32 current_origin_x;
+  i32 current_origin_y;
+  bool running;
+  bool drawing;
+  arrows_t arrows;
+  arrow_t tmp_arrow;
+};
 
 int main(void) {
   SDL_Init(SDL_INIT_EVERYTHING);
@@ -17,15 +33,55 @@ int main(void) {
   SDL_Renderer *renderer = SDL_CreateRenderer(
       window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
 
-  bool running = true;
+  state_t st = {
+      .mouse_x = -1,
+      .mouse_y = -1,
+      .current_origin_x = -1,
+      .current_origin_y = -1,
+      .running = true,
+      .drawing = false,
+      .arrows = {0},
+      .tmp_arrow = {0},
+  };
 
   SDL_Event event = {0};
 
-  while (running) {
+  if (!init_arrows_default(&(st.arrows))) {
+    return EXIT_FAILURE;
+  }
+
+  while (st.running) {
     while (SDL_PollEvent(&event)) {
       switch (event.type) {
       case SDL_QUIT:
-        running = false;
+        st.running = false;
+        break;
+      case SDL_MOUSEBUTTONUP:
+        if (event.button.button == SDL_BUTTON_LEFT) {
+          if (st.drawing) {
+            add_arrow(&(st.arrows), st.tmp_arrow);
+
+            st.tmp_arrow = (arrow_t){0};
+
+            st.drawing = false;
+          } else {
+            st.current_origin_x = event.button.x;
+            st.current_origin_y = event.button.y;
+
+            st.drawing = true;
+          }
+        } else if (event.button.button == SDL_BUTTON_RIGHT) {
+          st.current_origin_x = -1;
+          st.current_origin_y = -1;
+
+          st.drawing = false;
+        }
+
+        break;
+      case SDL_MOUSEMOTION:
+        st.mouse_x = event.motion.x;
+        st.mouse_y = event.motion.y;
+
         break;
       }
     }
@@ -34,6 +90,16 @@ int main(void) {
 
     SDL_RenderClear(renderer);
 
+    if (st.drawing) {
+      st.tmp_arrow.origin = (point_t){st.current_origin_x, st.current_origin_y};
+      st.tmp_arrow.direction = (vec2_t){st.mouse_x - st.current_origin_x,
+                                        st.mouse_y - st.current_origin_y};
+
+      draw_arrow(renderer, &(st.tmp_arrow), (colour_t){.abgr = 0xff0000ff});
+    }
+
+    draw_arrows(renderer, &(st.arrows), (colour_t){.abgr = 0xff000000});
+
     SDL_RenderPresent(renderer);
   }
 
@@ -43,5 +109,5 @@ int main(void) {
 
   SDL_Quit();
 
-  return 0;
+  return EXIT_SUCCESS;
 }