3 Copyright (C) 2010-2014 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 #include "util/numeric.h"
27 const char *OreManager::ELEMENT_TITLE = "ore";
29 FlagDesc flagdesc_ore[] = {
30 {"absheight", OREFLAG_ABSHEIGHT},
31 {"scatter_noisedensity", OREFLAG_DENSITY},
32 {"claylike_nodeisnt", OREFLAG_NODEISNT},
37 ///////////////////////////////////////////////////////////////////////////////
40 size_t OreManager::placeAllOres(Mapgen *mg, u32 seed, v3s16 nmin, v3s16 nmax)
44 for (size_t i = 0; i != m_elements.size(); i++) {
45 Ore *ore = (Ore *)m_elements[i];
49 nplaced += ore->placeOre(mg, seed, nmin, nmax);
57 ///////////////////////////////////////////////////////////////////////////////
61 c_ore = CONTENT_IGNORE;
73 size_t Ore::placeOre(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
77 in_range |= (nmin.Y <= height_max && nmax.Y >= height_min);
78 if (flags & OREFLAG_ABSHEIGHT)
79 in_range |= (nmin.Y >= -height_max && nmax.Y <= -height_min) << 1;
84 if (in_range & ORE_RANGE_MIRROR) {
85 ymin = MYMAX(nmin.Y, -height_max);
86 ymax = MYMIN(nmax.Y, -height_min);
88 ymin = MYMAX(nmin.Y, height_min);
89 ymax = MYMIN(nmax.Y, height_max);
91 if (clust_size >= ymax - ymin + 1)
96 generate(mg->vm, mg->seed, blockseed, nmin, nmax);
102 void OreScatter::generate(ManualMapVoxelManipulator *vm, int seed,
103 u32 blockseed, v3s16 nmin, v3s16 nmax)
105 PseudoRandom pr(blockseed);
106 MapNode n_ore(c_ore, 0, ore_param2);
108 int volume = (nmax.X - nmin.X + 1) *
109 (nmax.Y - nmin.Y + 1) *
110 (nmax.Z - nmin.Z + 1);
111 int csize = clust_size;
112 int orechance = (csize * csize * csize) / clust_num_ores;
113 int nclusters = volume / clust_scarcity;
115 for (int i = 0; i != nclusters; i++) {
116 int x0 = pr.range(nmin.X, nmax.X - csize + 1);
117 int y0 = pr.range(nmin.Y, nmax.Y - csize + 1);
118 int z0 = pr.range(nmin.Z, nmax.Z - csize + 1);
120 if (np && (NoisePerlin3D(np, x0, y0, z0, seed) < nthresh))
123 for (int z1 = 0; z1 != csize; z1++)
124 for (int y1 = 0; y1 != csize; y1++)
125 for (int x1 = 0; x1 != csize; x1++) {
126 if (pr.range(1, orechance) != 1)
129 u32 i = vm->m_area.index(x0 + x1, y0 + y1, z0 + z1);
130 if (!CONTAINS(c_wherein, vm->m_data[i].getContent()))
133 vm->m_data[i] = n_ore;
139 void OreSheet::generate(ManualMapVoxelManipulator *vm, int seed,
140 u32 blockseed, v3s16 nmin, v3s16 nmax)
142 PseudoRandom pr(blockseed + 4234);
143 MapNode n_ore(c_ore, 0, ore_param2);
145 int max_height = clust_size;
146 int y_start = pr.range(nmin.Y, nmax.Y - max_height);
149 int sx = nmax.X - nmin.X + 1;
150 int sz = nmax.Z - nmin.Z + 1;
151 noise = new Noise(np, 0, sx, sz);
153 noise->seed = seed + y_start;
154 noise->perlinMap2D(nmin.X, nmin.Z);
157 for (int z = nmin.Z; z <= nmax.Z; z++)
158 for (int x = nmin.X; x <= nmax.X; x++) {
159 float noiseval = noise->result[index++];
160 if (noiseval < nthresh)
163 int height = max_height * (1. / pr.range(1, 3));
164 int y0 = y_start + np->scale * noiseval; //pr.range(1, 3) - 1;
165 int y1 = y0 + height;
166 for (int y = y0; y != y1; y++) {
167 u32 i = vm->m_area.index(x, y, z);
168 if (!vm->m_area.contains(i))
170 if (!CONTAINS(c_wherein, vm->m_data[i].getContent()))
173 vm->m_data[i] = n_ore;