mirror of https://github.com/minetest/minetest.git
250 lines
10 KiB
C++
250 lines
10 KiB
C++
/*
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Minetest
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Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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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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#include "mapgen_indev.h"
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#include "constants.h"
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#include "log.h"
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/////////////////// Mapgen Indev perlin noise default values
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NoiseIndevParams nparams_indev_def_terrain_base
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(-AVERAGE_MUD_AMOUNT, 20.0, v3f(250.0, 250.0, 250.0), 82341, 5, 0.6, 1);
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NoiseIndevParams nparams_indev_def_terrain_higher
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(20.0, 16.0, v3f(500.0, 500.0, 500.0), 85039, 5, 0.6, 1);
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NoiseIndevParams nparams_indev_def_steepness
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(0.85, 0.5, v3f(125.0, 125.0, 125.0), -932, 5, 0.7, 1);
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NoiseIndevParams nparams_indev_def_mud
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(AVERAGE_MUD_AMOUNT, 2.0, v3f(200.0, 200.0, 200.0), 91013, 3, 0.55, 1);
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///////////////////////////////////////////////////////////////////////////////
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void NoiseIndev::init(NoiseIndevParams *np, int seed, int sx, int sy, int sz) {
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Noise::init((NoiseParams*)np, seed, sx, sy, sz);
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this->npindev = np;
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}
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NoiseIndev::NoiseIndev(NoiseIndevParams *np, int seed, int sx, int sy) : Noise(np, seed, sx, sy) {
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init(np, seed, sx, sy, 1);
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}
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NoiseIndev::NoiseIndev(NoiseIndevParams *np, int seed, int sx, int sy, int sz) : Noise(np, seed, sx, sy, sz) {
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init(np, seed, sx, sy, sz);
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}
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float farscale(float scale, float x, float y, float z) {
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return ( 1 + ( 1 - (MAP_GENERATION_LIMIT * 3 - (fabs(x) + fabs(y) + fabs(z)) ) / (MAP_GENERATION_LIMIT * 3) ) * (scale - 1) );
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}
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void NoiseIndev::transformNoiseMapFarScale(float xx, float yy, float zz) {
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// more correct use distantion from 0,0,0 via pow, but + is faster
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//float farscale = ( 1 + ( 1 - (MAP_GENERATION_LIMIT * 3 - (fabs(xx) + fabs(yy) + fabs(zz)) ) / (MAP_GENERATION_LIMIT * 3) ) * ((npindev)->farscale - 1) );
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// dstream << "TNM rs=" << farscale << " from=" << (npindev)->farscale << " x=" << xx << " y=" << yy <<" z=" << zz << std::endl;
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int i = 0;
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for (int z = 0; z != sz; z++) {
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for (int y = 0; y != sy; y++) {
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for (int x = 0; x != sx; x++) {
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//result[i] = result[i] * npindev->scale * farscale + npindev->offset;
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result[i] = result[i] * npindev->scale * farscale(npindev->farscale,xx,yy,zz) + npindev->offset;
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i++;
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}
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}
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}
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}
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MapgenIndev::MapgenIndev(int mapgenid, MapgenIndevParams *params) : MapgenV6(mapgenid, params) {
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noiseindev_terrain_base = new NoiseIndev(params->npindev_terrain_base, seed, csize.X, csize.Y);
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noiseindev_terrain_higher = new NoiseIndev(params->npindev_terrain_higher, seed, csize.X, csize.Y);
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noiseindev_steepness = new NoiseIndev(params->npindev_steepness, seed, csize.X, csize.Y);
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// noise_height_select = new Noise(params->np_height_select, seed, csize.X, csize.Y);
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// noise_trees = new Noise(params->np_trees, seed, csize.X, csize.Y);
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noiseindev_mud = new NoiseIndev(params->npindev_mud, seed, csize.X, csize.Y);
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// noise_beach = new Noise(params->np_beach, seed, csize.X, csize.Y);
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// noise_biome = new Noise(params->np_biome, seed, csize.X, csize.Y);
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}
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MapgenIndev::~MapgenIndev() {
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delete noiseindev_terrain_base;
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delete noiseindev_terrain_higher;
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delete noiseindev_steepness;
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//delete noise_height_select;
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//delete noise_trees;
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delete noiseindev_mud;
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//delete noise_beach;
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//delete noise_biome;
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}
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void MapgenIndev::calculateNoise() {
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int x = node_min.X;
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int y = node_min.Y;
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int z = node_min.Z;
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// Need to adjust for the original implementation's +.5 offset...
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if (!(flags & MG_FLAT)) {
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noiseindev_terrain_base->perlinMap2D(
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x + 0.5 * noiseindev_terrain_base->npindev->spread.X,
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z + 0.5 * noiseindev_terrain_base->npindev->spread.Z);
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noiseindev_terrain_base->transformNoiseMapFarScale(x, y, z);
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//noise_terrain_base->transformNoiseMap();
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noiseindev_terrain_higher->perlinMap2D(
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x + 0.5 * noiseindev_terrain_higher->npindev->spread.X,
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z + 0.5 * noiseindev_terrain_higher->npindev->spread.Z);
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noiseindev_terrain_higher->transformNoiseMapFarScale(x, y, z);
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//noise_terrain_higher->transformNoiseMap();
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noiseindev_steepness->perlinMap2D(
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x + 0.5 * noiseindev_steepness->npindev->spread.X,
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z + 0.5 * noiseindev_steepness->npindev->spread.Z);
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noiseindev_steepness->transformNoiseMapFarScale(x, y, z);
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noise_height_select->perlinMap2D(
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x + 0.5 * noise_height_select->np->spread.X,
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z + 0.5 * noise_height_select->np->spread.Z);
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}
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if (!(flags & MG_FLAT)) {
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noiseindev_mud->perlinMap2D(
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x + 0.5 * noiseindev_mud->npindev->spread.X,
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z + 0.5 * noiseindev_mud->npindev->spread.Z);
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noiseindev_mud->transformNoiseMapFarScale(x, y, z);
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}
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noise_beach->perlinMap2D(
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x + 0.2 * noise_beach->np->spread.X,
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z + 0.7 * noise_beach->np->spread.Z);
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noise_biome->perlinMap2D(
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x + 0.6 * noise_biome->np->spread.X,
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z + 0.2 * noise_biome->np->spread.Z);
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}
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bool MapgenIndevParams::readParams(Settings *settings) {
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freq_desert = settings->getFloat("mgv6_freq_desert");
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freq_beach = settings->getFloat("mgv6_freq_beach");
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npindev_terrain_base = settings->getNoiseIndevParams("mgindev_np_terrain_base");
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npindev_terrain_higher = settings->getNoiseIndevParams("mgindev_np_terrain_higher");
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npindev_steepness = settings->getNoiseIndevParams("mgindev_np_steepness");
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np_height_select = settings->getNoiseParams("mgv6_np_height_select");
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np_trees = settings->getNoiseParams("mgv6_np_trees");
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npindev_mud = settings->getNoiseIndevParams("mgindev_np_mud");
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np_beach = settings->getNoiseParams("mgv6_np_beach");
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np_biome = settings->getNoiseParams("mgv6_np_biome");
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np_cave = settings->getNoiseParams("mgv6_np_cave");
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bool success =
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npindev_terrain_base && npindev_terrain_higher && npindev_steepness &&
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np_height_select && np_trees && npindev_mud &&
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np_beach && np_biome && np_cave;
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return success;
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}
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void MapgenIndevParams::writeParams(Settings *settings) {
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settings->setFloat("mgv6_freq_desert", freq_desert);
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settings->setFloat("mgv6_freq_beach", freq_beach);
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settings->setNoiseIndevParams("mgindev_np_terrain_base", npindev_terrain_base);
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settings->setNoiseIndevParams("mgindev_np_terrain_higher", npindev_terrain_higher);
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settings->setNoiseIndevParams("mgindev_np_steepness", npindev_steepness);
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settings->setNoiseParams("mgv6_np_height_select", np_height_select);
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settings->setNoiseParams("mgv6_np_trees", np_trees);
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settings->setNoiseIndevParams("mgindev_np_mud", npindev_mud);
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settings->setNoiseParams("mgv6_np_beach", np_beach);
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settings->setNoiseParams("mgv6_np_biome", np_biome);
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settings->setNoiseParams("mgv6_np_cave", np_cave);
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}
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float MapgenIndev::baseTerrainLevelFromNoise(v2s16 p) {
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if (flags & MG_FLAT)
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return water_level;
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float terrain_base = NoisePerlin2DPosOffset(noiseindev_terrain_base->npindev,
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p.X, 0.5, p.Y, 0.5, seed);
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float terrain_higher = NoisePerlin2DPosOffset(noiseindev_terrain_higher->npindev,
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p.X, 0.5, p.Y, 0.5, seed);
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float steepness = NoisePerlin2DPosOffset(noiseindev_steepness->npindev,
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p.X, 0.5, p.Y, 0.5, seed);
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float height_select = NoisePerlin2DNoTxfmPosOffset(noise_height_select->np,
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p.X, 0.5, p.Y, 0.5, seed);
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return baseTerrainLevel(terrain_base, terrain_higher,
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steepness, height_select);
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}
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float MapgenIndev::baseTerrainLevelFromMap(int index) {
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if (flags & MG_FLAT)
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return water_level;
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float terrain_base = noiseindev_terrain_base->result[index];
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float terrain_higher = noiseindev_terrain_higher->result[index];
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float steepness = noiseindev_steepness->result[index];
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float height_select = noise_height_select->result[index];
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return baseTerrainLevel(terrain_base, terrain_higher,
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steepness, height_select);
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}
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float MapgenIndev::getMudAmount(int index)
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{
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if (flags & MG_FLAT)
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return AVERAGE_MUD_AMOUNT;
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/*return ((float)AVERAGE_MUD_AMOUNT + 2.0 * noise2d_perlin(
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0.5+(float)p.X/200, 0.5+(float)p.Y/200,
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seed+91013, 3, 0.55));*/
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return noiseindev_mud->result[index];
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}
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void MapgenIndev::defineCave(Cave & cave, PseudoRandom ps, v3s16 node_min, bool large_cave) {
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cave.min_tunnel_diameter = 2;
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cave.max_tunnel_diameter = ps.range(2,6);
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cave.dswitchint = ps.range(1,14);
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//cave.tunnel_routepoints = 0;
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//cave.part_max_length_rs = 0;
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cave.flooded = large_cave && ps.range(0,4);
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if(large_cave){
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cave.part_max_length_rs = ps.range(2,4);
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//dstream<<"try:"<<farscale(0.2, node_min.X,node_min.Y,node_min.Z)*30<<std::endl;
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if (node_min.Y < -500 && !ps.range(0, farscale(0.2, node_min.X,node_min.Y,node_min.Z)*30)) { //huge
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cave.flooded = ps.range(0, 1);
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//dstream<<"HUGE:"<<cave.flooded<<std::endl;
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cave.tunnel_routepoints = ps.range(5, 1522);
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cave.min_tunnel_diameter = 30;
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cave.max_tunnel_diameter = ps.range(30, ps.range(80,120));
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} else {
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//dstream<<"large:"<<cave.flooded<<std::endl;
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cave.tunnel_routepoints = ps.range(5, ps.range(15,30));
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cave.min_tunnel_diameter = 5;
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cave.max_tunnel_diameter = ps.range(7, ps.range(8,24));
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}
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} else {
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cave.part_max_length_rs = ps.range(2,9);
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cave.tunnel_routepoints = ps.range(10, ps.range(15,30));
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}
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cave.large_cave_is_flat = (ps.range(0,1) == 0);
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}
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