From: Laurent Mazet <mazet@softndesign.org>
Date: Sun, 30 Jun 2024 14:29:18 +0000 (+0200)
Subject: tile moves and jumps
X-Git-Tag: v1.0~34
X-Git-Url: https://secure.softndesign.org/git/?a=commitdiff_plain;h=fcfe8c341b3cd85e5f3540ecca63b7793e46740b;p=checkers.git

tile moves and jumps
---

diff --git a/checkers.c b/checkers.c
index 6ab7858..53dde10 100644
--- a/checkers.c
+++ b/checkers.c
@@ -181,10 +181,12 @@ int main (int argc, char *argv[])
     int player = 0;
     while (!stop) {
         char *ptr = NULL;
+        int jump = 0;
 
         boardwindow (board);
         if (1) { /* not end of game */
-            cursorwindow (board, xcursor, ycursor, mode);
+            jump = cursorwindow (board, xcursor, ycursor, mode);
+            msgwindow (player == 0 ? "Player One": "Player Two", xmsg, ymsg, lmsg);
         } else {
             msgwindow ("End of game", xmsg, ymsg, lmsg);
         }
@@ -206,8 +208,23 @@ int main (int argc, char *argv[])
             if (mode == 0) {
                 xcursor = (xcursor + 1) % board->width;
                 ycursor = (ycursor + board->height - 1) % board->height;
-            } else {
+            } else if ((jump) && (testjump (board, xcursor, ycursor, 0))) {
+                *getcell (board, xcursor, ycursor) = '.';
+                *getcell (board, xcursor + 1, ycursor - 1) = '.';
+                *getcell (board, xcursor + 2, ycursor - 2) = '0' + player;
+                xcursor += 2;
+                ycursor -= 2;
+                if (!testalljumps (board, xcursor, ycursor)) {
+                    mode = 0;
+                    player ^= 1;
+                }
+            } else if ((player == 1) && (!jump) && (getvalue (board, xcursor + 1, ycursor - 1) == '.')) {
+                *getcell (board, xcursor, ycursor) = '.';
+                *getcell (board, xcursor + 1, ycursor - 1) = '0' + player;
+                xcursor++;
+                ycursor--;
                 mode = 0;
+                player ^= 1;
             }
             break;
         case KEY_LEFT:
@@ -215,8 +232,23 @@ int main (int argc, char *argv[])
             if (mode == 0) {
                 xcursor = (xcursor + board->width - 1) % board->width;
                 ycursor = (ycursor + board->height - 1) % board->height;
-            } else {
+            } else if ((jump) && (testjump (board, xcursor, ycursor, 1))) {
+                *getcell (board, xcursor, ycursor) = '.';
+                *getcell (board, xcursor - 1, ycursor - 1) = '.';
+                *getcell (board, xcursor - 2, ycursor - 2) = '0' + player;
+                xcursor -= 2;
+                ycursor -= 2;
+                if (!testalljumps (board, xcursor, ycursor)) {
+                    mode = 0;
+                    player ^= 1;
+                }
+            } else if ((player == 1) && (!jump) && (getvalue (board, xcursor - 1, ycursor - 1) == '.')) {
+                *getcell (board, xcursor, ycursor) = '.';
+                *getcell (board, xcursor - 1, ycursor - 1) = '0' + player;
+                xcursor--;
+                ycursor--;
                 mode = 0;
+                player ^= 1;
             }
             break;
         case KEY_DOWN:
@@ -224,8 +256,23 @@ int main (int argc, char *argv[])
             if (mode == 0) {
                 xcursor = (xcursor + board->width - 1) % board->width;
                 ycursor = (ycursor + 1) % board->height;
-            } else {
+            } else if ((jump) && (testjump (board, xcursor, ycursor, 2))) {
+                *getcell (board, xcursor, ycursor) = '.';
+                *getcell (board, xcursor - 1, ycursor + 1) = '.';
+                *getcell (board, xcursor - 2, ycursor + 2) = '0' + player;
+                xcursor -= 2;
+                ycursor += 2;
+                if (!testalljumps (board, xcursor, ycursor)) {
+                    mode = 0;
+                    player ^= 1;
+                }
+            } else if ((player == 0) && (!jump) && (getvalue (board, xcursor - 1, ycursor + 1) == '.')) {
+                *getcell (board, xcursor, ycursor) = '.';
+                *getcell (board, xcursor - 1, ycursor + 1) = '0' + player;
+                xcursor--;
+                ycursor++;
                 mode = 0;
+                player ^= 1;
             }
             break;
         case KEY_RIGHT:
@@ -233,8 +280,23 @@ int main (int argc, char *argv[])
             if (mode == 0) {
                 xcursor = (xcursor + 1) % board->width;
                 ycursor = (ycursor + 1) % board->height;
-            } else {
+            } else if ((jump) && (testjump (board, xcursor, ycursor, 3))) {
+                *getcell (board, xcursor, ycursor) = '.';
+                *getcell (board, xcursor + 1, ycursor + 1) = '.';
+                *getcell (board, xcursor + 2, ycursor + 2) = '0' + player;
+                xcursor += 2;
+                ycursor += 2;
+                if (!testalljumps (board, xcursor, ycursor)) {
+                    mode = 0;
+                    player ^= 1;
+                }
+            } else if ((player == 0) && (!jump) && (getvalue (board, xcursor + 1, ycursor + 1) == '.')) {
+                *getcell (board, xcursor, ycursor) = '.';
+                *getcell (board, xcursor + 1, ycursor + 1) = '0' + player;
+                xcursor++;
+                ycursor++;
                 mode = 0;
+                player ^= 1;
             }
             break;
         case KEY_ESC:
diff --git a/display.c b/display.c
index a25b644..8595908 100644
--- a/display.c
+++ b/display.c
@@ -248,6 +248,9 @@ void _element2 (board_t *board, int x, int y, int symb)
     case '5':
         set_color (bred);
         break;
+    case 'S':
+        set_color (byellow);
+        break;
     case 'Z':
         set_color (bblue);
         break;
@@ -348,9 +351,11 @@ void boardwindow (board_t *board)
     }
 }
 
-void cursorwindow (board_t *board, int x, int y, int mode)
+int cursorwindow (board_t *board, int x, int y, int mode)
 {
-    switch (getvalue (board, x, y)) {
+    int jump = 0;
+    char id = getvalue (board, x, y);
+    switch (id) {
     case '0':
         _element (board, x, y, (mode) ? '2' : '4');
         break;
@@ -363,7 +368,44 @@ void cursorwindow (board_t *board, int x, int y, int mode)
         break;
     }
     if (mode) {
+        if (testjump (board, x, y, 0)) {
+            _element (board, x + 2, y - 2, 'S');
+            jump = 1;
+        }
+        if (testjump (board, x, y, 1)) {
+            _element (board, x - 2, y - 2, 'S');
+            jump = 1;
+        }
+        if (testjump (board, x, y, 2)) {
+            _element (board, x - 2, y + 2, 'S');
+            jump = 1;
+        }
+        if (testjump (board, x, y, 3)) {
+            _element (board, x + 2, y + 2, 'S');
+            jump = 1;
+        }
+        if (!jump) {
+            switch (id) {
+            case '0':
+                if (getvalue (board, x - 1, y + 1) == '.') {
+                    _element (board, x - 1, y + 1, 'S');
+                }
+                if (getvalue (board, x + 1, y + 1) == '.') {
+                    _element (board, x + 1, y + 1, 'S');
+                }
+                break;
+            case '1':
+                if (getvalue (board, x + 1, y - 1) == '.') {
+                    _element (board, x + 1, y - 1, 'S');
+                }
+                if (getvalue (board, x - 1, y - 1) == '.') {
+                    _element (board, x - 1, y - 1, 'S');
+                }
+                break;
+            }
+        }
     }
+    return jump;
 }
 
 char *savewindow (int length, int xoffset, int yoffset)
diff --git a/display.h b/display.h
index 4423829..0d10547 100644
--- a/display.h
+++ b/display.h
@@ -10,7 +10,7 @@ int helpwindow (char *msg, int xoffset, int yoffset);
 
 void boardwindow (board_t *board);
 
-void cursorwindow (board_t *board, int x, int y, int mode);
+int cursorwindow (board_t *board, int x, int y, int mode);
 
 char *savewindow (int length, int xoffset, int yoffset);
 
diff --git a/function.c b/function.c
index 28d1003..9c3cf8a 100644
--- a/function.c
+++ b/function.c
@@ -233,4 +233,47 @@ char getvalue (board_t *board, int x, int y)
     return (x >= 0) && (x < board->width) && (y >= 0) && (y < board->height) ? *getcell (board, x, y) : 0;
 }
 
+int testjump (board_t *board, int x, int y, int mode)
+{
+    int ret = 0;
+
+    char id = getvalue (board, x, y);
+    switch (mode) {
+    case 0:
+        if ((x + 2 < board->width) && (y - 2 >= 0)) {
+            ret = (getvalue (board, x + 1, y - 1) == '0' + '1' - id) && (getvalue (board, x + 2, y - 2) == '.');
+        }
+        break;
+    case 1:
+        if ((x - 2 >= 0) && (y - 2 >= 0)) {
+            ret = (getvalue (board, x - 1, y - 1) == '0' + '1' - id) && (getvalue (board, x - 2, y - 2) == '.');
+        }
+        break;
+    case 2:
+        if ((x - 2 >= 0) && (y + 2 < board->height)) {
+            ret = (getvalue (board, x - 1, y + 1) == '0' + '1' - id) && (getvalue (board, x - 2, y + 2) == '.');
+        }
+        break;
+    case 3:
+        if ((x + 2 < board->width) && (y + 2 < board->height)) {
+            ret = (getvalue (board, x + 1, y + 1) == '0' + '1' - id) && (getvalue (board, x + 2, y + 2) == '.');
+        }
+        break;
+    }
+    return ret;
+}
+
+int testalljumps (board_t *board, int x, int y)
+{
+    int ret = 0;
+    int m;
+    for (m = 0; m < 4; m++) {
+        if (testjump (board, x, y, m)) {
+            ret = 1;
+            break;
+        }
+    }
+    return ret;
+}
+
 /* vim: set ts=4 sw=4 et: */
diff --git a/function.h b/function.h
index 3c941ef..fbea508 100644
--- a/function.h
+++ b/function.h
@@ -39,6 +39,10 @@ char *getcell (board_t *board, int x, int y);
 
 char getvalue (board_t *board, int x, int y);
 
+int testjump (board_t *board, int x, int y, int mode);
+
+int testalljumps (board_t *board, int x, int y);
+
 #endif /* __FUNCTION_H__ */
 
 /* vim: set ts=4 sw=4 et: */