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	Advtrains mod for minetest.	orwell

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	Commit message (Collapse)	Author	Age
*	Add speed as number in km/h to train hud	lemon-melon	2017-07-15
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*	Add m/s to km/h helper function	lemon-melon	2017-07-15
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*	Add command to throw all players out of trains, fixes #78	orwell96	2017-06-12
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*	Fix broken door animations caused by continuous set_object_properties() ↵	orwell96	2017-06-08
| | | | | |	messages sent to client ... which each time caused the animation to be reset
*	lower capacity of freight cars	orwell96	2017-06-08
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*	Change log level of save_all message to atprint()	orwell96	2017-06-08
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*	Do not clear the F table when running the init code fails	orwell96	2017-06-08
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*	Merge pull request #67 from AntumDeluge/settings	orwell96	2017-06-08
|\ | | | |	Replace deprecated methods
| *	Replace deprecated methods:	AntumDeluge	2017-06-07
| | | | | | | |	- 'setting_get' with 'settings:get' - 'setting_getbool' with 'settings:get_bool'
* |	Check if 'digtron' global exists before calling in condition:	AntumDeluge	2017-06-07
|/ | |	Fixes 'Undeclared global variable "digtron"'.
*	Add loading/unloading rails (#63)	gpcf	2017-05-31
| | | |	Pull request by gpcf Will update zip file with next release
*	Fix still broken ndb restoring, and make sid() honor nil values	orwell96	2017-05-31
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*	Fix detector rails changing to default orientation	orwell96	2017-05-30
| | | |	Release 1.8.1
*	Re-add option for debugging features and add option to disable collisions	orwell96	2017-05-30
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*	Fix collision bug (trains driving through each other)	orwell96	2017-05-30
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*	Re-add debug ring buffer and print its contents on a lua crash	orwell96	2017-05-30
| | | | |	When the crash on linuxworks has been fixed, the ringbuffer will go into master and behind an option also fix last commit
*	Fix command + Update zip file - Version 1.8	orwell96	2017-05-22
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*	Add Digtron compatibility	orwell96	2017-05-22
| | | |	Override digtron's item-place function to be able to place tracks with digtrons.
*	Fix some 'undeclared assignment' warnings	orwell96	2017-05-22
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*	Fix Syntax Error	orwell96	2017-05-22
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*	Fix issue #40	orwell96	2017-05-22
| | | |	Was caused by arrowconn not being set. Instructs user to revisit.
*	Remove the debug setting	orwell96	2017-05-22
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*	Fix a series of bugs	orwell96	2017-05-22
| | | | | | | |	- Prevent min_iot from becoming a comma value, which caused a major problem on the linuxworks server - Fix previous commit - also restore the nodedb file after a crash Other changes: - add chatcommand to update the nodedb after using WorldEdit
*	Don't invoke conway on a path item that has been over-generated	orwell96	2017-05-15
| | | |	This breaks ATC systems that are based on wronly switched switches, but fixes a series of bugs (esp. setting train recovery positions at a place where no tracks are)
*	write the saved nodedb state back to the map when restoring after a crash	orwell96	2017-05-12
| | | | |	also, print a complete stack trace when an error happens also, don't replace nodes in the nodedb when worldedit has been used
*	Remove pos_to_string whereever possible to prevent crashes	orwell96	2017-05-12
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*	Relicensing media under CC-BY-SA	orwell96	2017-05-04
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*	Performance improvements: Don't clear paths unless absolutely necessary	orwell96	2017-05-03
| | | | |	instead delete path elements that are too far from the train one-by-one Also when switching a switch or changing rails, only clear train paths of trains that are nearby.
*	Merge nocrash branch into master and merging it with the unified functions ↵	orwell96	2017-04-29
|\ | | | | | | | | | |	so that restoring works how it should Also fix minor bugs and an occasional crash with couples
| *	Add pcall wrapper to prevent server crashes when advtrains throws an error	orwell96	2017-04-29
| | | | | | | | | |	Instead, read save files again and restore state before the crash Rebased to latest commit
* |	Unify globalstep, load and save of all components into single functions	orwell96	2017-04-29
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*	Add Andrew's Cross	orwell96	2017-04-27
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*	Fix bug introduced by last commit (revert change)	orwell96	2017-04-12
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*	Add privilege for basic train operation.	orwell96	2017-04-09
| | | |	This privilege is granted to singleplayer by default, but is not granted on servers. This prevents unexperienced or evil players from breaking automatic train operation on servers.
*	record_protection_violation: fix player name not being passed	orwell96	2017-04-07
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*	Fix #59	orwell96	2017-04-05
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*	Actually check for protection when placing trains and use the train_place ↵	orwell96	2017-04-02
| | | |	privilege
*	Assert some variable types obtained from lua automation	orwell96	2017-03-30
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*	Add support to display text to passengers and on the outside of the train	orwell96	2017-03-30
| | | | |	Outside is currently displayed as infotext. TODO: signs-like draw it on the wagon FIXME: When object properties are set, for some reason the animation restarts
*	Respect protection_bypass privilege, fix crash with areas and properly ↵	orwell96	2017-03-30
| | | |	record protection violations
*	Fix privilege enforcement being useless	orwell96	2017-03-16
| | | |	Privilege violations caused an error message but didn't abort the operation
*	Fix Atc arrows pointing into wrong direction	orwell96	2017-03-12
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*	Screw buttonlike rules for wall signals and use regular rules.	orwell96	2017-03-12
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*	Redo rail models	orwell96	2017-03-12
| | | |	Use multiple textures for slope objects, include mbb's rail textures and make curves and switches look better. Also add cable template.
*	Don't drop items in creative mode when player gets overrun by train	orwell96	2017-03-11
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*	"Sneak" instead of "Shift" for the sneak key	orwell96	2017-03-09
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*	Update manual and include everything in repo	orwell96	2017-03-09
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*	Improve debug outputs of couples and increase maximum distance	orwell96	2017-03-03
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*	Only get on by walking in when there's a platform, improve get off handling	orwell96	2017-02-28
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*	Add passive component naming	orwell96	2017-02-28
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generated by cgit v1.2.3 (git 2.39.1) at 2025-01-16 18:49:57 +0000

/*
Minetest
Copyright (C) 2010-2018 celeron55, Perttu Ahola <celeron55@gmail.com>
Copyright (C) 2010-2018 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
Copyright (C) 2015-2018 paramat

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 "util/numeric.h"
#include <cmath>
#include "map.h"
#include "mapgen.h"
#include "mapgen_v5.h"
#include "mapgen_v6.h"
#include "mapgen_v7.h"
#include "mg_biome.h"
#include "cavegen.h"

// TODO Remove this. Cave liquids are now defined and located using biome definitions
static NoiseParams nparams_caveliquids(0, 1, v3f(150.0, 150.0, 150.0), 776, 3, 0.6, 2.0);


////
//// CavesNoiseIntersection
////

CavesNoiseIntersection::CavesNoiseIntersection(
	const NodeDefManager *nodedef, BiomeManager *biomemgr, v3s16 chunksize,
	NoiseParams *np_cave1, NoiseParams *np_cave2, s32 seed, float cave_width)
{
	assert(nodedef);
	assert(biomemgr);

	m_ndef = nodedef;
	m_bmgr = biomemgr;

	m_csize = chunksize;
	m_cave_width = cave_width;

	m_ystride    = m_csize.X;
	m_zstride_1d = m_csize.X * (m_csize.Y + 1);

	// Noises are created using 1-down overgeneration
	// A Nx-by-1-by-Nz-sized plane is at the bottom of the desired for
	// re-carving the solid overtop placed for blocking sunlight
	noise_cave1 = new Noise(np_cave1, seed, m_csize.X, m_csize.Y + 1, m_csize.Z);
	noise_cave2 = new Noise(np_cave2, seed, m_csize.X, m_csize.Y + 1, m_csize.Z);
}


CavesNoiseIntersection::~CavesNoiseIntersection()
{
	delete noise_cave1;
	delete noise_cave2;
}


void CavesNoiseIntersection::generateCaves(MMVManip *vm,
	v3s16 nmin, v3s16 nmax, u8 *biomemap)
{
	assert(vm);
	assert(biomemap);

	noise_cave1->perlinMap3D(nmin.X, nmin.Y - 1, nmin.Z);
	noise_cave2->perlinMap3D(nmin.X, nmin.Y - 1, nmin.Z);

	const v3s16 &em = vm->m_area.getExtent();
	u32 index2d = 0;  // Biomemap index

	for (s16 z = nmin.Z; z <= nmax.Z; z++)
	for (s16 x = nmin.X; x <= nmax.X; x++, index2d++) {
		bool column_is_open = false;  // Is column open to overground
		bool is_under_river = false;  // Is column under river water
		bool is_under_tunnel = false;  // Is tunnel or is under tunnel
		bool is_top_filler_above = false;  // Is top or filler above node
		// Indexes at column top
		u32 vi = vm->m_area.index(x, nmax.Y, z);
		u32 index3d = (z - nmin.Z) * m_zstride_1d + m_csize.Y * m_ystride +
			(x - nmin.X);  // 3D noise index
		// Biome of column
		Biome *biome = (Biome *)m_bmgr->getRaw(biomemap[index2d]);
		u16 depth_top = biome->depth_top;
		u16 base_filler = depth_top + biome->depth_filler;
		u16 depth_riverbed = biome->depth_riverbed;
		u16 nplaced = 0;
		// Don't excavate the overgenerated stone at nmax.Y + 1,
		// this creates a 'roof' over the tunnel, preventing light in
		// tunnels at mapchunk borders when generating mapchunks upwards.
		// This 'roof' is removed when the mapchunk above is generated.
		for (s16 y = nmax.Y; y >= nmin.Y - 1; y--,
				index3d -= m_ystride,
				VoxelArea::add_y(em, vi, -1)) {
			content_t c = vm->m_data[vi].getContent();

			if (c == CONTENT_AIR || c == biome->c_water_top ||
					c == biome->c_water) {
				column_is_open = true;
				is_top_filler_above = false;
				continue;
			}

			if (c == biome->c_river_water) {
				column_is_open = true;
				is_under_river = true;
				is_top_filler_above = false;
				continue;
			}

			// Ground
			float d1 = contour(noise_cave1->result[index3d]);
			float d2 = contour(noise_cave2->result[index3d]);

			if (d1 * d2 > m_cave_width && m_ndef->get(c).is_ground_content) {
				// In tunnel and ground content, excavate
				vm->m_data[vi] = MapNode(CONTENT_AIR);
				is_under_tunnel = true;
				// If tunnel roof is top or filler, replace with stone
				if (is_top_filler_above)
					vm->m_data[vi + em.X] = MapNode(biome->c_stone);
				is_top_filler_above = false;
			} else if (column_is_open && is_under_tunnel &&
					(c == biome->c_stone || c == biome->c_filler)) {
				// Tunnel entrance floor, place biome surface nodes
				if (is_under_river) {
					if (nplaced < depth_riverbed) {
						vm->m_data[vi] = MapNode(biome->c_riverbed);
						is_top_filler_above = true;
						nplaced++;
					} else {
						// Disable top/filler placement
						column_is_open = false;
						is_under_river = false;
						is_under_tunnel = false;
					}
				} else if (nplaced < depth_top) {
					vm->m_data[vi] = MapNode(biome->c_top);
					is_top_filler_above = true;
					nplaced++;
				} else if (nplaced < base_filler) {
					vm->m_data[vi] = MapNode(biome->c_filler);
					is_top_filler_above = true;
					nplaced++;
				} else {
					// Disable top/filler placement
					column_is_open = false;
					is_under_tunnel = false;
				}
			} else {
				// Not tunnel or tunnel entrance floor
				// Check node for possible replacing with stone for tunnel roof
				if (c == biome->c_top || c == biome->c_filler)
					is_top_filler_above = true;