Merge pull request fogleman#8 from mbozada/US5-TNT

US 5, Tasks: US 5.1.1, US 5.1.2, US 5.1.3

src/item.c

@@ -25,6 +25,7 @@ const int items[] = {
     SUN_FLOWER,
     WHITE_FLOWER,
     BLUE_FLOWER,
+    TNT,
     COLOR_00,
     COLOR_01,
     COLOR_02,
@@ -87,7 +88,7 @@ const int blocks[256][6] = {
     {0, 0, 0, 0, 0, 0}, // 21
     {0, 0, 0, 0, 0, 0}, // 22
     {0, 0, 0, 0, 0, 0}, // 23
-    {0, 0, 0, 0, 0, 0}, // 24
+    {80, 80, 96, 64, 80, 80}, // 24 - TNT
     {0, 0, 0, 0, 0, 0}, // 25
     {0, 0, 0, 0, 0, 0}, // 26
     {0, 0, 0, 0, 0, 0}, // 27

src/item.h

@@ -25,6 +25,7 @@
 #define SUN_FLOWER 21
 #define WHITE_FLOWER 22
 #define BLUE_FLOWER 23
+#define TNT 24
 #define COLOR_00 32
 #define COLOR_01 33
 #define COLOR_02 34

src/main.c

@@ -2137,11 +2137,15 @@ void on_light() {
     }
 }
 
+// Destroy Block
 void on_left_click() {
     State *s = &g->players->state;
     int hx, hy, hz;
     int hw = hit_test(0, s->x, s->y, s->z, s->rx, s->ry, &hx, &hy, &hz);
     if (hy > 0 && hy < 256 && is_destructable(hw)) {
+        if (hw == TNT) {
+            explode(hx, hy, hz);
+        }
         set_block(hx, hy, hz, 0);
         record_block(hx, hy, hz, 0);
         if (is_plant(get_block(hx, hy + 1, hz))) {
@@ -2150,6 +2154,27 @@ void on_left_click() {
     }
 }
 
+// Destroy Blocks in 5 x 5 x 5 cube.
+void explode(int x, int y, int z) {
+    x = x - 2;
+    y = y - 2;
+    z = z - 2;
+    for (int i = 0; i < 5; i++) {
+        for (int j = 0; j < 5; j++) {
+            for (int k = 0; k < 5; k++) {
+                destroyBlock(x + i, y + j, z + k);
+            }
+        }
+    }
+}
+
+// Destroy block at given x, y, z.
+void destroyBlock(int x, int y, int z) {
+    set_block(x, y, z, 0);
+    record_block(x, y, z, 0);
+}
+
+// Add block
 void on_right_click() {
     State *s = &g->players->state;
     int hx, hy, hz;

src/map.h

@@ -39,7 +39,7 @@ void map_alloc(Map *map, int dx, int dy, int dz, int mask);
 void map_free(Map *map);
 void map_copy(Map *dst, Map *src);
 void map_grow(Map *map);
-int map_set(Map *map, int x, int y, int z, int w);
+int map_set(Map *map, int x, int y, int z, int w); // w is block we want to put there
 int map_get(Map *map, int x, int y, int z);
 
 #endif