From c2cc936d8890f20378d0ffc732b7f656237d2a1e Mon Sep 17 00:00:00 2001
From: verdant <im@verdant.ee>
Date: Sun, 28 Jun 2026 02:53:07 +0800
Subject: Implement cell survival and neighbor detection logic

---
 main.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 56 insertions(+), 9 deletions(-)

diff --git a/main.c b/main.c
index 0f311dc..90159f1 100644
--- a/main.c
+++ b/main.c
@@ -8,8 +8,10 @@
 #include <SDL2/SDL_video.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
+#include <time.h>
 #include <unistd.h>
-
+#include <wctype.h>
 #define DEFAULT_WIDTH 900
 #define DEFAULT_HEIGHT 900
 #define COLOR 0x9AC2B3
@@ -28,6 +30,47 @@ typedef struct SDL_info {
     SDL_Event *e;
 } SDL_info;
 
+void life(pedi *p) {
+    int **rd_only_matrix = (int **)malloc(sizeof(int *) * p->width);
+    for (int i = 0; i < p->width; i++) {
+        rd_only_matrix[i] = (int *)malloc(sizeof(int) * p->height);
+        memcpy(rd_only_matrix[i], p->matrix[i], sizeof(int) * p->height);
+    }
+
+    int dirs[8][2] = {{-1, -1}, {-1, 0}, {-1, 1}, {0, -1},
+                      {0, 1},   {1, -1}, {1, 0},  {1, 1}};
+
+    for (int i = 0; i < p->width; i++) {
+        for (int j = 0; j < p->height; j++) {
+            int live_nei = 0;
+
+            for (int d = 0; d < 8; d++) {
+                int nx = i + dirs[d][0];
+                int ny = j + dirs[d][1];
+
+                if (nx >= 0 && nx < p->width && ny >= 0 && ny < p->height) {
+                    if (rd_only_matrix[nx][ny] == 1) {
+                        live_nei++;
+                        printf("(%d, %d)\n ", nx, ny);
+                    }
+                }
+            }
+
+            int cur_is_alive = rd_only_matrix[i][j];
+
+            if (cur_is_alive == 1) {
+                if (live_nei < 2 || live_nei > 3) {
+                    p->matrix[i][j] = 0;
+                }
+            } else {
+                if (live_nei == 3) {
+                    p->matrix[i][j] = 1;
+                }
+            }
+        }
+    }
+}
+
 void init_cell(pedi *p, SDL_Event e) {
     int mouse_x, mouse_y, cell_x, cell_y = 0;
 
@@ -45,22 +88,19 @@ void init_cell(pedi *p, SDL_Event e) {
 }
 
 void game_update(SDL_Window *pwindow, pedi *p) {
-    if (!p) {
-        return;
-    }
-
     SDL_UpdateWindowSurface(pwindow);
 }
 
 void draw_cells(pedi *p, SDL_Rect *cells, SDL_Surface *s) {
     int m = 0;
-    for (int i = 0; i < p->height; i++) {
-        for (int j = 0; j < p->width; j++) {
+    for (int i = 0; i < p->width; i++) {
+        for (int j = 0; j < p->height; j++) {
             cells[m].h = 10;
             cells[m].w = 10;
+            cells[m].x = i * 10;
+            cells[m].y = j * 10;
+
             if (p->matrix[i][j] == 1) {
-                cells[m].x = i * 10;
-                cells[m].y = j * 10;
                 SDL_FillRect(s, &cells[m], COLOR);
             } else {
                 SDL_FillRect(s, &cells[m], EMPTY_COLOR);
@@ -118,7 +158,14 @@ int main(int argc, char **argv) {
                 cell_lock = 0;
             }
         }
+        if (!cell_lock) {
+            life(p);
+        }
         draw_cells(p, cells, psurface);
+        if (!cell_lock) {
+            struct timespec req = {0, 300000000};  // 0秒 + 500,000,000纳秒
+            nanosleep(&req, NULL);
+        }
         game_update(pwindow, p);
     }
 
-- 
cgit v1.2.3