Cavegen: Remove now unnecessary checks for water, lava, ice

Remove large cave checks for air
Mgv5/mgv7:Add is_ground_content checks to 3d noise tunnels
More large caves
Shorten lines

1 files changed, 19 insertions, 13 deletions

diff --git a/src/mapgen_v7.cpp b/src/mapgen_v7.cpp
index f370a0fdb..12ca12a86 100644
--- a/src/mapgen_v7.cpp
+++ b/src/mapgen_v7.cpp
@@ -605,11 +605,12 @@ bool MapgenV7::generateBiomes(float *heat_map, float *humidity_map)
 		for (s16 y = node_max.Y; y >= node_min.Y; y--) {
 			content_t c = vm->m_data[i].getContent();
 
-			if (c != CONTENT_IGNORE && c != CONTENT_AIR && (y == node_max.Y || have_air)) {
-				biome           = bmgr->getBiome(heat_map[index], humidity_map[index], y);
-				dfiller         = biome->depth_filler + noise_filler_depth->result[index];
-				y0_top          = biome->depth_top;
-				y0_filler       = biome->depth_top + dfiller;
+			if (c != CONTENT_IGNORE && c != CONTENT_AIR &&
+					(y == node_max.Y || have_air)) {
+				biome = bmgr->getBiome(heat_map[index], humidity_map[index], y);
+				dfiller = biome->depth_filler + noise_filler_depth->result[index];
+				y0_top = biome->depth_top;
+				y0_filler = biome->depth_top + dfiller;
 				depth_water_top = biome->depth_water_top;
 
 				if (biome->c_stone == c_desert_stone)
@@ -820,16 +821,21 @@ void MapgenV7::generateCaves(int max_stone_y)
 				u32 i = vm->m_area.index(node_min.X, y, z);
 				for (s16 x = node_min.X; x <= node_max.X;
 						x++, i++, index++, index2d++) {
-					Biome *biome = (Biome *)bmgr->getRaw(biomemap[index2d]);
-					content_t c = vm->m_data[i].getContent();
-					if (c == CONTENT_AIR || (y <= water_level &&
-						c != biome->c_stone && c != c_stone))
-						continue;
-
 					float d1 = contour(noise_cave1->result[index]);
 					float d2 = contour(noise_cave2->result[index]);
-					if (d1 * d2 > 0.3)
+					if (d1 * d2 > 0.3) {
+						Biome *biome = (Biome *)bmgr->
+									getRaw(biomemap[index2d]);
+						content_t c = vm->m_data[i].getContent();
+						if (!ndef->get(c).is_ground_content ||
+								c == CONTENT_AIR ||
+								(y <= water_level &&
+								c != biome->c_stone &&
+								c != c_stone))
+							continue;
+
 						vm->m_data[i] = MapNode(CONTENT_AIR);
+					}
 				}
 				index2d -= ystride;
 			}
@@ -838,7 +844,7 @@ void MapgenV7::generateCaves(int max_stone_y)
 	}
 
 	PseudoRandom ps(blockseed + 21343);
-	u32 bruises_count = (ps.range(1, 5) == 1) ? ps.range(1, 2) : 0;
+	u32 bruises_count = (ps.range(1, 4) == 1) ? ps.range(1, 2) : 0;
 	for (u32 i = 0; i < bruises_count; i++) {
 		CaveV7 cave(this, &ps);
 		cave.makeCave(node_min, node_max, max_stone_y);