raycast start

code/game/aabb.h

@@ -3,15 +3,14 @@
 #include "../core/types.h"
 #include "../core/macros.h"
 
-
 typedef struct AABB AABB;
-struct AABB {
+struct AABB
+{
   V2f pos;
   V2f size;
 };
 
-
 function bool AABB_Collide(AABB a, AABB b);
 function bool AABB_Point(AABB a, V2f v);
 
-#endif  // LD_GAME_AABB_H_
+#endif // LD_GAME_AABB_H_

code/game/impl/aabb.c

@@ -1,15 +1,35 @@
 #include "game/aabb.h"
 #include "core/types.h"
 
-bool AABB_Collide(AABB a, AABB b) {
+bool AABB_Collide(AABB a, AABB b)
+{
   bool collision_x = a.pos.x + a.size.x >= b.pos.x && b.pos.x + b.size.x >= a.pos.x;
   bool collision_y = a.pos.y + a.size.x >= b.pos.y && b.pos.y + b.size.y >= a.pos.y;
   return collision_x && collision_y;
 }
 
-bool AABB_Point(AABB a, V2f v) {
+bool AABB_Point(AABB a, V2f v)
+{
   bool collision_x = a.pos.x + a.size.x >= v.x && a.pos.x <= v.x;
   bool collision_y = a.pos.x + a.size.y >= v.y && a.pos.y <= v.y;
   return collision_x && collision_y;
 }
 
+bool AABB_Slab(V2f origin, V2f point, AABB a)
+{
+  V2f start = a.pos;
+  V2f finish = {a.pos.x + a.size.x, a.pos.y + a.size.y};
+  V2f direction = {origin.x - point.x, origin.y - point.y};
+  // x
+  F32 tLow = (start.x - origin.x) / direction.x;
+  F32 tHigh = (finish.x - origin.x) / direction.x;
+  F32 tMin = min(tLow, tHigh);
+  F32 tMax = max(tLow, tHigh);
+  // y
+  tLow = (start.x - origin.x) / direction.x;
+  tHigh = (finish.x - origin.x) / direction.x;
+
+  tMin = max(tMin, min(tLow, tHigh));
+  tMax = min(tMax, max(tLow, tHigh));
+  return tMax >= max(0.0, tMin);
+}

code/game/impl/player.c

@@ -4,23 +4,34 @@
 
 void PlayerUpdate(SDL_Event *event, Player *player)
 {
-    SDL_KeyboardEvent key = event->key;
-    switch(key.key) {
-      case SDLK_W: {
-        player->pos.y += 10;
-        break;
-      }
-      case SDLK_A: {
-        player->pos.x -= 10;
-        break;
-      }
-      case SDLK_D: {
-        player->pos.x += 10;
-        break;
-      }
-      case SDLK_S: {
-        player->pos.y -= 10;
-        break;
-      }
-    }
+  SDL_KeyboardEvent key = event->key;
+  SDL_MouseButtonEvent mouseBtn = event->button;
+  switch (key.key)
+  {
+  case SDLK_W:
+  {
+    player->pos.y += 10;
+    break;
+  }
+  case SDLK_A:
+  {
+    player->pos.x -= 10;
+    break;
+  }
+  case SDLK_D:
+  {
+    player->pos.x += 10;
+    break;
+  }
+  case SDLK_S:
+  {
+    player->pos.y -= 10;
+    break;
+  }
+  }
+  if (mouseBtn.clicks == 1)
+  {
+    // shooting
+    player->bulletsLoaded -= 1;
+  }
 }

code/game/player.h

@@ -10,6 +10,7 @@ typedef struct Player Player;
 struct Player
 {
     V2f pos;
+    U32 bulletsLoaded;
 };
 
 function void PlayerUpdate(SDL_Event *event, Player *player);