snake: add score/highscoreHEADmaster

1 files changed, 56 insertions, 2 deletions

diff --git a/src/games/snake/Snake.cpp b/src/games/snake/Snake.cpp
index b7c9004..de9dad7 100644
--- a/src/games/snake/Snake.cpp
+++ b/src/games/snake/Snake.cpp
@@ -2,18 +2,30 @@
 #include "games/Game.hpp"
 #include "renderer/Renderer.hpp"
 #include "common/defs.hpp"
+#include "common/MemoryManager.hpp"
+#include "common/math.hpp"
 
 #include <cstdint>
 #include <imgui.h>
+#include <fstream>
 
 
 std::mt19937 Snake::s_rng{std::random_device{}()};
 
 
 Snake::Snake()
+    : m_font {s_dejavu_sans_mono_filepath, 22}
 {
     static_assert(max_map_width <= sizeof(m_body_bitmap[0])*8);
     static_assert(max_map_height <= sizeof(m_body_bitmap[0])*8);
+
+    int32_t highscore = 0;
+    std::ifstream highscore_file_in {"snake_highscore.txt"};
+    if (highscore_file_in) {
+        highscore_file_in >> highscore;
+        highscore_file_in.close();
+    }
+    m_highscore = highscore;
 }
 
 void
@@ -42,6 +54,8 @@ Snake::Start()
     m_dist = std::uniform_int_distribution<int32_t>(0, m_map_width*m_map_height - 3);
     SpawnFood();
 
+    m_score = 0;
+
     m_game_status = game_resume;
 }
 
@@ -76,7 +90,7 @@ Snake::MaybeMoveSnake(float dt)
         if ((head_pos.x < 0 || head_pos.x >= m_map_width) ||
             (head_pos.y < 0 || head_pos.y >= m_map_height))
         {
-            m_game_status = game_over;
+            HandleGameOver();
             return;
         }
         uint64_t head_bit = 1 << head_pos.x;
@@ -85,7 +99,7 @@ Snake::MaybeMoveSnake(float dt)
             body_bits &= (uint32_t)~(1 << tail_pos.x);
         }
         if (head_bit & body_bits) {
-            m_game_status = game_over;
+            HandleGameOver();
             return;
         }
 
@@ -102,6 +116,7 @@ Snake::MaybeMoveSnake(float dt)
 
 
         if (m_body_positions[m_head] == m_food_position) {
+            m_score += 1;
             SpawnFood();
         }
         else {
@@ -125,6 +140,24 @@ Snake::MaybeMoveSnake(float dt)
 }
 
 void
+Snake::HandleGameOver()
+{
+    m_game_status = game_over;
+    if (m_score > m_highscore) {
+        m_highscore = m_score;
+
+        std::ofstream highscore_file_out {highscore_path};
+        if (highscore_file_out) {
+            highscore_file_out << m_highscore << std::endl;
+            highscore_file_out.close();
+        }
+        else {
+            SDL_LogInfo(0, "Snake: cannot open %s for writing", highscore_path);
+        }
+    }
+}
+
+void
 Snake::ProcessEvent(SDL_Event& event)
 {
     switch (event.type) {
@@ -306,5 +339,26 @@ Snake::Draw()
         food_y + bodypart_size
     };
     g_renderer.PushRectangle(rect, color_food, z_food);
+
+
+    /* draw scores */
+    String32Id score_label = MemoryManager::EmplaceString32_Frame(U"Score");
+    String32Id score_value = MemoryManager::EmplaceString32_Frame(int32_to_u32string(m_score));
+
+    String32Id highscore_label = MemoryManager::EmplaceString32_Frame(U"Highscore");
+    String32Id highscore_value = MemoryManager::EmplaceString32_Frame(int32_to_u32string(m_highscore));
+
+
+    V2F32 score_pos = {1.3f, 2.5f};
+    V2F32 highscore_pos = {2.3f, 2.5f};
+    Color anyscore_color {0.9f, 0.9f, 0.9f, 1.0f};
+
+    g_renderer.PushString32(highscore_label, m_font, highscore_pos, anyscore_color, z_text);
+    highscore_pos.y -= 0.1f;
+    g_renderer.PushString32(highscore_value, m_font, highscore_pos, anyscore_color, z_text);
+
+    g_renderer.PushString32(score_label, m_font, score_pos, anyscore_color, z_text);
+    score_pos.y -= 0.1f;
+    g_renderer.PushString32(score_value, m_font, score_pos, anyscore_color, z_text);
 }