Added animations for spawning of a new tile

game.c

@@ -1,10 +1,12 @@
 #include "game.h"
+#include <raylib.h>
+#include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
 
 // Depending on the direction, move the tiles and check if we can merge with the
 // tiles in that direction. We merge the tiles only if they are of the same value
-void move(GameState_t *state, move_direction_t direction) {
+bool move(GameState_t *state, move_direction_t direction) {
   bool merged[BOARD_HEIGHT][BOARD_WIDTH] = {0};
   bool moved = false;
   switch (direction) {
@@ -158,6 +160,8 @@ void move(GameState_t *state, move_direction_t direction) {
   }
   if (moved)
     state->moves_made++;
+
+  return moved;
 }
 
 void reset_board(GameState_t *state) {
@@ -183,7 +187,7 @@ void reset_board(GameState_t *state) {
   }
 }
 
-bool spawn_tile(GameState_t *state) {
+void spawn_tile(GameState_t *state, Vector2 *spawned_tile_pos) {
   int empty_tiles[BOARD_WIDTH * BOARD_HEIGHT][2];
   int empty_count = 0;
 
@@ -198,13 +202,17 @@ bool spawn_tile(GameState_t *state) {
   }
 
   if (empty_count == 0)
-    return false;
+    return;
 
   int random_index = rand() % empty_count;
   int spawn_y = empty_tiles[random_index][0];
   int spawn_x = empty_tiles[random_index][1];
   state->board[spawn_y][spawn_x] = (rand() % 10 == 0) ? 4 : 2; // 10% chance to spawn a 4
-  return true;
+
+  spawned_tile_pos->x = spawn_x;
+  spawned_tile_pos->y = spawn_y;
+
+  return;
 }
 
 // This function will only run, if every tile is filled (checked by `spawn_tile`). We can take advantage of that and

game.h

@@ -16,7 +16,7 @@ typedef struct {
   unsigned int moves_made;
 } GameState_t;
 
-void move(GameState_t *state, move_direction_t direction);
+bool move(GameState_t *state, move_direction_t direction);
 void reset_board(GameState_t *state);
-bool spawn_tile(GameState_t *state);
+void spawn_tile(GameState_t *state, Vector2 *spawned_tile_pos);
 bool can_move(GameState_t *state);

ui.c

@@ -26,13 +26,17 @@ static bool is_dragging;
 static Vector2 drag_start_pos;
 static bool is_animating;
 
+// If there isn't a tile to animate then store it as {-1,-1}
+static Vector2 new_tile = {-1, 1};
+static float new_tile_animation_progress;
+
 // Common logic shared between both input handlers
 static void after_input(GameState_t *game_state) {
-  if (!spawn_tile(game_state) && !can_move(game_state)) {
+  spawn_tile(game_state, &new_tile);
+  if (!can_move(game_state)) {
+    is_animating = false; // No more moves, so we won't be animating anymore
     game_state->status = LOST;
-    return;
+  } else {
-  }
-
     // We moved, merged or spawned a tile, so we will be animating
     is_animating = true;
 
@@ -45,6 +49,7 @@ static void after_input(GameState_t *game_state) {
         }
       }
     }
+  }
 
   FILE *f = fopen("save.dat", "wb");
   if (f) {
@@ -111,23 +116,41 @@ void handle_keyboard_input(GameState_t *game_state) {
     reset_board(game_state);
   }
 
+  bool moved = false;
   if (IsKeyReleased(KEY_UP)) {
-    move(game_state, UP);
+    moved = move(game_state, UP);
   } else if (IsKeyReleased(KEY_DOWN)) {
-    move(game_state, DOWN);
+    moved = move(game_state, DOWN);
   } else if (IsKeyReleased(KEY_LEFT)) {
-    move(game_state, LEFT);
+    moved = move(game_state, LEFT);
   } else if (IsKeyReleased(KEY_RIGHT)) {
-    move(game_state, RIGHT);
+    moved = move(game_state, RIGHT);
-  } else {
-    return;
   }
 
+  if (moved) {
     after_input(game_state);
+  }
+}
+
+void animate_new_tile() {
+  if (new_tile.x == -1 && new_tile.y == -1)
+    return;
+
+  // Simple pop-in animation that scales the tile from 0 to full size
+  new_tile_animation_progress += GetFrameTime() * 5; // Adjust speed as needed
+  if (new_tile_animation_progress >= 1.0f) {
+    new_tile_animation_progress = 0.3f;
+    new_tile = (Vector2){-1, -1}; // Reset after animation completes
+    is_animating = false;
+  }
 }
 
 // Main render loop, responsible ONLY for redering
 void render(GameState_t *game_state) {
+  if (is_animating) {
+    animate_new_tile();
+  }
+
   for (int y = 0; y < BOARD_HEIGHT; y++) {
     for (int x = 0; x < BOARD_WIDTH; x++) {
       int tile_value = game_state->board[y][x];
@@ -139,7 +162,14 @@ void render(GameState_t *game_state) {
         color_index = sizeof(tile_colors) / sizeof(tile_colors[0]) - 1; // Cap to the last color
       }
 
+      if (is_animating && new_tile.x == x && new_tile.y == y) {
+        float scale = new_tile_animation_progress; // Scale from 0 to 1
+        int scaled_size = (int)(TILE_SIZE * scale);
+        int offset = (TILE_SIZE - scaled_size) / 2;
+        DrawRectangle(pos_x + offset, pos_y + offset, scaled_size, scaled_size, tile_colors[color_index]);
+      } else {
         DrawRectangle(pos_x, pos_y, TILE_SIZE, TILE_SIZE, tile_colors[color_index]);
+      }
       if (tile_value != 0) {
         const char *text = TextFormat("%d", tile_value);
         DrawText(text, pos_x + TILE_SIZE / 2 - MeasureText(text, 20) / 2, pos_y + TILE_SIZE / 2 - 10, 20, BLACK);
@@ -150,6 +180,7 @@ void render(GameState_t *game_state) {
   DrawText(TextFormat("Score: %d", game_state->score), WINDOW_HEIGHT, BOARD_MARGIN, 20, BLACK);
   DrawText(TextFormat("Moves used: %d", game_state->moves_made), WINDOW_HEIGHT, BOARD_MARGIN + 20, 20, BLACK);
 
+  DrawText("By Piotr Kozak", WINDOW_WIDTH - MeasureText("By Piotr Kozak", 16) - 10, WINDOW_HEIGHT - 24, 16, GRAY);
   if (game_state->status == PLAYING) {
     DrawText("Drag with the mouse to move tiles", 400 - MeasureText("Drag with the mouse to move tiles", 20) / 2,
              WINDOW_HEIGHT - 40, 20, GRAY);