From a605d690921670008d605d067f1cf8cd1619def7 Mon Sep 17 00:00:00 2001
From: kwolekr <kwolekr@minetest.net>
Date: Tue, 10 May 2016 13:21:13 -0400
Subject: Cavegen: Remove CavesV6 dependency on Mapgen

---
 src/cavegen.h | 43 +++++++++++++++++++++++++++++--------------
 1 file changed, 29 insertions(+), 14 deletions(-)

(limited to 'src/cavegen.h')

diff --git a/src/cavegen.h b/src/cavegen.h
index b50455c1c..74cd0b416 100644
--- a/src/cavegen.h
+++ b/src/cavegen.h
@@ -23,13 +23,14 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #define VMANIP_FLAG_CAVE VOXELFLAG_CHECKED1
 #define DEFAULT_LAVA_DEPTH (-256)
 
-class MapgenV6;
+class GenerateNotifier;
 
 class CavesRandomWalk {
 public:
 	Mapgen *mg;
 	MMVManip *vm;
 	INodeDefManager *ndef;
+	s16 *heightmap;
 
 	// variables
 	int lava_depth;
@@ -64,7 +65,7 @@ public:
 	content_t c_ice;
 
 	int water_level;
-	int ystride;
+	u16 ystride;
 
 	CavesRandomWalk(Mapgen *mg, PseudoRandom *ps);
 	void makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height);
@@ -87,9 +88,18 @@ public:
 */
 class CavesV6 {
 public:
-	MapgenV6 *mg;
 	MMVManip *vm;
 	INodeDefManager *ndef;
+	GenerateNotifier *gennotify;
+	PseudoRandom *ps;
+	PseudoRandom *ps2;
+
+	s16 *heightmap;
+	content_t c_water_source;
+	content_t c_lava_source;
+	int water_level;
+
+	u16 ystride;
 
 	s16 min_tunnel_diameter;
 	s16 max_tunnel_diameter;
@@ -100,7 +110,6 @@ public:
 	bool large_cave;
 	bool large_cave_is_flat;
 
-	s16 max_stone_y;
 	v3s16 node_min;
 	v3s16 node_max;
 
@@ -113,16 +122,22 @@ public:
 	s16 route_y_min;
 	s16 route_y_max;
 
-	PseudoRandom *ps;
-	PseudoRandom *ps2;
-
-	content_t c_water_source;
-	content_t c_lava_source;
-
-	int water_level;
-
-	CavesV6(MapgenV6 *mg, PseudoRandom *ps, PseudoRandom *ps2, bool large_cave);
-	void makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height);
+	// ndef is a mandatory parameter.
+	// If gennotify is NULL, generation events are not logged.
+	CavesV6(INodeDefManager *ndef,
+		GenerateNotifier *gennotify = NULL,
+		int water_level = 1,
+		content_t water_source = CONTENT_IGNORE,
+		content_t lava_source = CONTENT_IGNORE);
+
+	// vm, ps, and ps2 are mandatory parameters.
+	// If heightmap is NULL, the surface level at all points is assumed to
+	// be water_level.
+	void makeCave(MMVManip *vm, v3s16 nmin, v3s16 nmax,
+		PseudoRandom *ps, PseudoRandom *ps2,
+		bool is_large_cave, int max_stone_height, s16 *heightmap = NULL);
+
+private:
 	void makeTunnel(bool dirswitch);
 	void carveRoute(v3f vec, float f, bool randomize_xz, bool tunnel_above_ground);
 };
-- 
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