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146 lines
3.7 KiB
C++
146 lines
3.7 KiB
C++
/*
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Minetest
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Copyright (C) 2010-2013 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef CAVEGEN_HEADER
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#define CAVEGEN_HEADER
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#define VMANIP_FLAG_CAVE VOXELFLAG_CHECKED1
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#define DEFAULT_LAVA_DEPTH (-256)
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class GenerateNotifier;
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class CavesRandomWalk {
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public:
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Mapgen *mg;
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MMVManip *vm;
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INodeDefManager *ndef;
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s16 *heightmap;
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// variables
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int lava_depth;
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NoiseParams *np_caveliquids;
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s16 min_tunnel_diameter;
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s16 max_tunnel_diameter;
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u16 tunnel_routepoints;
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int dswitchint;
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int part_max_length_rs;
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bool large_cave_is_flat;
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bool flooded;
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s16 max_stone_y;
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v3s16 node_min;
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v3s16 node_max;
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v3f orp; // starting point, relative to caved space
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v3s16 of; // absolute coordinates of caved space
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v3s16 ar; // allowed route area
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s16 rs; // tunnel radius size
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v3f main_direction;
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s16 route_y_min;
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s16 route_y_max;
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PseudoRandom *ps;
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content_t c_water_source;
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content_t c_lava_source;
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content_t c_ice;
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int water_level;
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u16 ystride;
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CavesRandomWalk(Mapgen *mg, PseudoRandom *ps);
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void makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height);
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void makeTunnel(bool dirswitch);
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void carveRoute(v3f vec, float f, bool randomize_xz);
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};
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/*
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CavesV6 is the original version of caves used with Mapgen V6.
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Though it uses the same fundamental algorithm as CavesRandomWalk, it is made
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separate to preserve the exact sequence of PseudoRandom calls - any change
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to this ordering results in the output being radically different.
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Because caves in Mapgen V6 are responsible for a large portion of the basic
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terrain shape, modifying this will break our contract of reverse
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compatibility for a 'stable' mapgen such as V6.
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tl;dr,
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*** DO NOT TOUCH THIS CLASS UNLESS YOU KNOW WHAT YOU ARE DOING ***
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*/
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class CavesV6 {
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public:
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MMVManip *vm;
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INodeDefManager *ndef;
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GenerateNotifier *gennotify;
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PseudoRandom *ps;
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PseudoRandom *ps2;
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s16 *heightmap;
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content_t c_water_source;
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content_t c_lava_source;
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int water_level;
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u16 ystride;
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s16 min_tunnel_diameter;
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s16 max_tunnel_diameter;
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u16 tunnel_routepoints;
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int dswitchint;
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int part_max_length_rs;
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bool large_cave;
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bool large_cave_is_flat;
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v3s16 node_min;
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v3s16 node_max;
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v3f orp; // starting point, relative to caved space
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v3s16 of; // absolute coordinates of caved space
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v3s16 ar; // allowed route area
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s16 rs; // tunnel radius size
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v3f main_direction;
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s16 route_y_min;
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s16 route_y_max;
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// ndef is a mandatory parameter.
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// If gennotify is NULL, generation events are not logged.
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CavesV6(INodeDefManager *ndef,
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GenerateNotifier *gennotify = NULL,
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int water_level = 1,
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content_t water_source = CONTENT_IGNORE,
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content_t lava_source = CONTENT_IGNORE);
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// vm, ps, and ps2 are mandatory parameters.
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// If heightmap is NULL, the surface level at all points is assumed to
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// be water_level.
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void makeCave(MMVManip *vm, v3s16 nmin, v3s16 nmax,
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PseudoRandom *ps, PseudoRandom *ps2,
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bool is_large_cave, int max_stone_height, s16 *heightmap = NULL);
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private:
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void makeTunnel(bool dirswitch);
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void carveRoute(v3f vec, float f, bool randomize_xz, bool tunnel_above_ground);
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};
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#endif
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