minetest/src/biome.cpp

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/*
Minetest-c55
Copyright (C) 2010-2011 kwolekr, Ryan Kwolek <kwolekr2@cs.scranton.edu>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "biome.h"
#include "nodedef.h"
#include "map.h" //for ManualMapVoxelManipulator
#include "main.h"
#define BT_NONE 0
#define BT_OCEAN 1
#define BT_LAKE 2
#define BT_SBEACH 3
#define BT_GBEACH 4
#define BT_PLAINS 5
#define BT_HILLS 6
#define BT_EXTREMEHILLS 7
#define BT_MOUNTAINS 8
#define BT_DESERT 9
#define BT_DESERTHILLS 10
#define BT_HELL 11
#define BT_AETHER 12
#define BT_BTMASK 0x3F
#define BTF_SNOW 0x40
#define BTF_FOREST 0x80
#define BGFREQ_1 ( 0.40)
#define BGFREQ_2 (BGFREQ_1 + 0.05)
#define BGFREQ_3 (BGFREQ_2 + 0.08)
#define BGFREQ_4 (BGFREQ_3 + 0.35)
#define BGFREQ_5 (BGFREQ_4 + 0.18)
//BGFREQ_5 is not checked as an upper bound; it ought to sum up to 1.00, but it's okay if it doesn't.
/*float bg1_temps[] = {0.0};
int bg1_biomes[] = {BT_OCEAN};
float bg2_temps[] = {10.0};
int bg2_biomes[] = {BT_GBEACH, BT_SBEACH};
float bg3_temps[] = {30.0, 40.0};
int bg3_biomes[] = {BT_HILLS, BT_EXTREMEHILLS, BT_MOUNTAINS};
float bg4_temps[] = {25.0, 30.0, 35.0, 40.0};
int bg4_biomes[] = {BT_HILLS, BT_EXTREMEHILLS, BT_MOUNTAINS, BT_DESERT, BT_DESERTHILLS};
float bg5_temps[] = {5.0, 40.0};
int bg5_biomes[] = {BT_LAKE, BT_PLAINS, BT_DESERT};*/
BiomeDefManager::BiomeDefManager(IGameDef *gamedef) {
this->m_gamedef = gamedef;
this->ndef = gamedef->ndef();
//addDefaultBiomes(); //can't do this in the ctor, too early
}
BiomeDefManager::~BiomeDefManager() {
for (int i = 0; i != bgroups.size(); i++)
delete bgroups[i];
}
void BiomeDefManager::addBiome() {
}
NoiseParams npmtdef = {0.0, 20.0, v3f(250., 250., 250.), 82341, 5, 0.6};
void BiomeDefManager::addDefaultBiomes() {
std::vector<Biome *> *bgroup;
Biome *b;
//bgroup = new std::vector<Biome *>;
b = new Biome;
b->name = "Default";
b->n_top = MapNode(ndef->getId("mapgen_stone"));
b->n_filler = b->n_top;
b->ntopnodes = 0;
b->height_min = -MAP_GENERATION_LIMIT;
b->height_max = MAP_GENERATION_LIMIT;
b->heat_min = FLT_MIN;
b->heat_max = FLT_MAX;
b->humidity_min = FLT_MIN;
b->humidity_max = FLT_MAX;
b->np = &npmtdef;
biome_default = b;
//bgroup->push_back(b);
//bgroups.push_back(bgroup);
}
Biome *BiomeDefManager::getBiome(float bgfreq, float heat, float humidity) {
std::vector<Biome *> bgroup;
Biome *b;
int i;
int ngroups = bgroup_freqs.size();
if (!ngroups)
return biome_default;
for (i = 0; (i != ngroups - 1) && (bgfreq > bgroup_freqs[i]); i++);
bgroup = *(bgroups[i]);
int nbiomes = bgroup.size();
if (!nbiomes)
return biome_default;
for (i = 0; i != nbiomes - 1; i++) {
b = bgroup[i];
if (heat >= b->heat_min && heat <= b->heat_max &&
humidity >= b->humidity_min && humidity <= b->humidity_max)
return b;
}
return biome_default;
}
//////////////////////////// [ Generic biome ] ////////////////////////////////
int Biome::getSurfaceHeight(float noise_terrain) {
return np->offset + np->scale * noise_terrain;
}
void Biome::genColumn(Mapgen *mg, int x, int z, int y1, int y2) {
//printf("(%d, %d): %f\n", x, z, mg->map_terrain[z * mg->ystride + x]);
//int surfaceh = 4;
int surfaceh = np->offset + np->scale * mg->map_terrain[(z - mg->node_min.Z) * 80 /*THIS IS TEMPORARY mg->ystride*/ + (x - mg->node_min.X)];
//printf("gen column %f\n", );
int y = y1;
int i = mg->vmanip->m_area.index(x, y, z); //z * mg->zstride + x + (y - mg->vmanip->m_area.MinEdge.Y) * mg->ystride;
for (; y <= surfaceh - ntopnodes && y <= y2; y++, i += mg->ystride)
mg->vmanip->m_data[i] = n_filler;
for (; y <= surfaceh && y <= y2; y++, i += mg->ystride)
mg->vmanip->m_data[i] = n_top;
for (; y <= y2; y++, i += mg->ystride)
mg->vmanip->m_data[i] = mg->n_air;
}
///////////////////////////// [ Ocean biome ] /////////////////////////////////
void BiomeOcean::genColumn(Mapgen *mg, int x, int z, int y1, int y2) {
int y, i = 0;
int surfaceh = np->offset + np->scale * mg->map_terrain[z * mg->ystride + x];
i = z * mg->zstride + x;
for (y = y1; y <= surfaceh - ntopnodes && y <= y2; y++, i += mg->ystride)
mg->vmanip->m_data[i] = n_filler;
for (; y <= surfaceh && y <= y2; y++, i += mg->ystride)
mg->vmanip->m_data[i] = n_top;
for (; y <= y2; y++, i += mg->ystride)
mg->vmanip->m_data[i] = mg->n_air;
}
///////////////////////////// [ Nether biome ] /////////////////////////////////
int BiomeHell::getSurfaceHeight(float noise_terrain) {
return np->offset + np->scale * noise_terrain;
}
void BiomeHell::genColumn(Mapgen *mg, int x, int z, int y1, int y2) {
int y, i = 0;
int surfaceh = np->offset + np->scale * mg->map_terrain[z * mg->ystride + x];
i = z * mg->zstride + x;
for (y = y1; y <= surfaceh - ntopnodes && y <= y2; y++, i += mg->ystride)
mg->vmanip->m_data[i] = n_filler;
for (; y <= surfaceh && y <= y2; y++, i += mg->ystride)
mg->vmanip->m_data[i] = n_top;
for (; y <= y2; y++, i += mg->ystride)
mg->vmanip->m_data[i] = mg->n_air;
}
///////////////////////////// [ Aether biome ] ////////////////////////////////
/////////////////////////// [ Superflat biome ] ///////////////////////////////
int BiomeSuperflat::getSurfaceHeight(float noise_terrain) {
return ntopnodes;
}
void BiomeSuperflat::genColumn(Mapgen *mg, int x, int z, int y1, int y2) {
int y, i = 0;
int surfaceh = ntopnodes;
i = z * mg->zstride + x;
for (y = y1; y <= surfaceh - ntopnodes && y <= y2; y++, i += mg->ystride)
mg->vmanip->m_data[i] = n_filler;
for (; y <= surfaceh && y <= y2; y++, i += mg->ystride)
mg->vmanip->m_data[i] = n_top;
for (; y <= y2; y++, i += mg->ystride)
mg->vmanip->m_data[i] = mg->n_air;
}