Find where the player is on the map

game.c

@@ -97,7 +97,7 @@ void process_bullet_collisions(Game *g, Entity *bullet) {
 
 void run_frame(Game *g) {
   handle_input(g);
-  move_player(g->player);
+  tick_player(g->player);
   FOREACH_ENEMY {
     INIT_ENEMY;
     if (entity_expired(e)) {

level.c

@@ -35,11 +35,35 @@ void init_level(Game *g, Level *l, char *filepath) {
   l->game = g;
 }
 
+size_t tile_index_from_position(Level *l, Vector2 p) {
+  size_t x_tile = p.x / 32;
+  size_t y_tile = p.y / 32;
+  return ((y_tile * l->width) + x_tile) % l->data_size;
+}
+
+typedef struct FourIndices {
+  size_t index[4];
+} FourIndices;
+
+FourIndices rect_corners(Level *l, Rectangle r) {
+  return (FourIndices) {
+    tile_index_from_position(l, (Vector2) { r.x, r.y }),
+    tile_index_from_position(l, (Vector2) { r.x + r.width, r.y }),
+    tile_index_from_position(l, (Vector2) { r.x, r.y + r.height }),
+    tile_index_from_position(l, (Vector2) { r.x + r.width, r.y + r.height}),
+  };
+}
+
 Color COLORS[4] = {BLACK, DARKGRAY, GRAY, LIGHTGRAY};
 void draw_tile(Level *l, float x, float y) {
   size_t index = (size_t)(x + (y * l->width)) % l->data_size;
   size_t data = l->data[index];
   Color c = COLORS[data];
+  FourIndices fi = rect_corners(l, l->game->player->bbox);
+  if (fi.index[0] == index) c = RED;
+  if (fi.index[1] == index) c = RED;
+  if (fi.index[2] == index) c = RED;
+  if (fi.index[3] == index) c = RED;
   DrawRectangle(x * 32, y * 32, 32, 32, c);
 }
 

player.c

@@ -16,6 +16,7 @@ void initialize_player(Game *g, Player *p) {
   p->position = (Vector2) { 400, 300 };
   p->velocity = (Vector2) { 0, 0 };
   p->acceleration = (Vector2) { 0, 0 };
+  p->bbox = (Rectangle) { 390, 320, 20, 60 };
   p->pitch = PITCH_NEUTRAL;
   p->roll = ROLL_NEUTRAL;
   Image sprite_img = LoadImage("img/player.png");
@@ -36,6 +37,7 @@ void handle_player_input(Player *p) {
 
 void draw_player(Player *p) {
   DrawTextureRec(p->spritesheet, (Rectangle) { 128, 128, 128, 128 }, (Vector2) { p->position.x - 64, p->position.y - 29 }, WHITE);
+  DrawRectangleRec(p->bbox, YELLOW);
 }
 
 void move_player(Player *p) {
@@ -61,6 +63,11 @@ void move_player(Player *p) {
   p->position.x += p->velocity.x;
   p->position.y += p->velocity.y;
 
+  p->bbox.x = p->position.x - (p->bbox.width / 2);
+  p->bbox.y = p->position.y + 20;
+}
+
+void update_camera_player(Player *p) {
   p->game->camera->target = p->position;
   p->game->camera->offset.y = 400;
   int level_width_in_pixels = p->game->level->width * 32;
@@ -74,3 +81,16 @@ void move_player(Player *p) {
     p->game->camera->offset.x = 400;
   }
 }
+
+void check_collision_top_left(Vector2 p) {
+}
+
+void check_collision_player_with_terrain(Player *p) {
+  check_collision_top_left(p->position);
+}
+
+void tick_player(Player *p) {
+  move_player(p);
+  update_camera_player(p);
+  check_collision_player_with_terrain(p);
+}

player.h

@@ -42,6 +42,7 @@ struct Player {
   Vector2 position;
   Vector2 velocity;
   Vector2 acceleration;
+  Rectangle bbox;
   PlayerPitch pitch;
   PlayerRoll roll;
   Texture2D spritesheet;
@@ -51,6 +52,6 @@ struct Player {
 void initialize_player(Game *g, Player *p);
 void handle_player_input(Player *p);
 void draw_player(Player *p);
-void move_player(Player *p);
+void tick_player(Player *p);
 
 #endif