Movement offset, camera to world projection...

xungeons.c

@@ -7,12 +7,15 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 
-#define level_width_limit  (120)
-#define level_height_limit ( 60)
+#define level_width_limit  (128)
+#define level_height_limit ( 64)
 #define members            (  6)
 #define items              ( 36)
 
 #define random(from, to) (rand () % (to - from + 1) + from)
+#define minimum(a, b)    ((a < b) ? a : b)
+#define maximum(a, b)    ((a > b) ? a : b)
+#define clamp(x, a, b)   ((x < a) ? a : (x > b) ? b : x)
 
 enum { normal = '0', bold = '1', italic = '2', blink = '5', reverse = '7' };
 
@@ -177,33 +180,8 @@ static void synchronize_screen (void) {
 		default:                                    break;
 	}
 
-	player.x = (char) ((player.x > level_width)  ? (level_width)  : ((player.x < 0) ? 0 : player.x));
-	player.y = (char) ((player.y > level_height) ? (level_height) : ((player.y < 0) ? 0 : player.y));
-}
-
-static void generate_party (void) {
-	int i, j;
-
-	player.x     = 0;
-	player.y     = 0;
-	player.coins = 0;
-
-	for (i = 0; i < items; ++i) {
-		player.inventory [i] = 0;
-	}
-
-	for (i = 0; i < members; ++i) {
-		player.weapon [i] = random (0, 3);
-		player.armour [i] = random (0, 3);
-		for (j = 0; j < points; ++j) {
-			player.point [i] [j] = random (12, 24);
-		}
-		for (j = 0; j < attributes; ++j) {
-			player.attribute [i] [j] = random (1, 4);
-		}
-		player.skill [i] = rand () % skills;
-		player.class [i] = rand () % classes;
-	}
+	player.x = clamp (player.x, 0, (char) level_width);
+	player.y = clamp (player.y, 0, (char) level_height);
 }
 
 static void generate_level (void) {
@@ -215,8 +193,8 @@ static void generate_level (void) {
 	level = calloc ((unsigned long int) (level_width * level_height), sizeof (* level));
 
 	for (room = random (6, 18); room > 1; --room) {
-		width  = random (level_width  / 6, level_width  / 2);
-		height = random (level_height / 6, level_height / 2);
+		width  = random (5, level_width  / 2);
+		height = random (5, level_height / 2);
 		x      = random (1, level_width  - width  - 1);
 		y      = random (1, level_height - height - 1);
 		for (i = 1; i < height - 1; ++i) {
@@ -244,6 +222,34 @@ static void generate_level (void) {
 	}
 }
 
+static void generate_party (void) {
+	int i, j;
+
+	player.coins = 0;
+
+	for (i = 0; i < items; ++i) {
+		player.inventory [i] = 0;
+	}
+
+	for (i = 0; i < members; ++i) {
+		player.weapon [i] = random (0, 3);
+		player.armour [i] = random (0, 3);
+		for (j = 0; j < points; ++j) {
+			player.point [i] [j] = random (12, 24);
+		}
+		for (j = 0; j < attributes; ++j) {
+			player.attribute [i] [j] = random (1, 4);
+		}
+		player.skill [i] = rand () % skills;
+		player.class [i] = rand () % classes;
+	}
+
+	do {
+		player.x = (char) (rand () % level_width);
+		player.y = (char) (rand () % level_height);
+	} while (level [player.y * level_width + player.x] != 1);
+}
+
 int main (void) {
 	int i, x, y;
 
@@ -251,8 +257,8 @@ int main (void) {
 
 	initialize_screen ();
 
-	generate_party ();
 	generate_level ();
+	generate_party ();
 
 	while (signal != 'Q') {
 		for (y = 0; y < screen_height; ++y) {
@@ -261,14 +267,14 @@ int main (void) {
 			}
 		}
 
-		for (y = 0; (y < level_height) && (y < screen_height); ++y) {
-			for (x = 0; (x < level_width) && (x < screen_width); ++x) {
-				i = (int) level [y * level_width + x];
+		for (y = 0; (y < screen_height) && (y + player.y < level_height - 1); ++y) {
+			for (x = 0; (x < screen_width) && (x + player.x < level_width - 1); ++x) {
+				i = (int) level [(y + player.y) * level_width + (x + player.x)];
 				screen_put (tiles [i].style, tiles [i].colour, tiles [i].symbol, x, y);
 			}
 		}
 
-		screen_put (bold, cyan, '@', player.x, player.y);
+		screen_put (bold, cyan, '@', screen_width / 2, screen_height / 2);
 
 		screen_print (bold, grey, "Warrior", screen_width - 24, 0, 24);