Fix android build by fixing patch line endings - minetest.git

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author	est31 <MTest31@outlook.com>	2016-05-14 16:46:46 +0200
committer	est31 <MTest31@outlook.com>	2016-05-14 16:46:46 +0200
commit	b25554c8d7260cdac6551c69900b78e24b0b48eb (patch)
tree	5bcc967bb3c9cd44334cb932e193fe324fd5bccd /minetest.conf.example
parent	b906ed4e5902785ab6f15012666e344c98fabe14 (diff)
download	minetest-b25554c8d7260cdac6551c69900b78e24b0b48eb.tar.gz minetest-b25554c8d7260cdac6551c69900b78e24b0b48eb.tar.bz2 minetest-b25554c8d7260cdac6551c69900b78e24b0b48eb.zip

Fix android build by fixing patch line endings

Diffstat (limited to 'minetest.conf.example')

0 files changed, 0 insertions, 0 deletions

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/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>

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 "voxelalgorithms.h"
#include "nodedef.h"
#include "mapblock.h"
#include "map.h"

namespace voxalgo
{

/*!
 * A direction.
 * 0=X+
 * 1=Y+
 * 2=Z+
 * 3=Z-
 * 4=Y-
 * 5=X-
 * 6=no direction
 * Two directions are opposite only if their sum is 5.
 */
typedef u8 direction;
/*!
 * Relative node position.
 * This represents a node's position in its map block.
 * All coordinates must be between 0 and 15.
 */
typedef v3s16 relative_v3;
/*!
 * Position of a map block (block coordinates).
 * One block_pos unit is as long as 16 node position units.
 */
typedef v3s16 mapblock_v3;

//! Contains information about a node whose light is about to change.
struct ChangingLight {
	//! Relative position of the node in its map block.
	relative_v3 rel_position;
	//! Position of the node's block.
	mapblock_v3 block_position;
	//! Pointer to the node's block.
	MapBlock *block = NULL;
	/*!
	 * Direction from the node that caused this node's changing
	 * to this node.
	 */
	direction source_direction = 6;

	ChangingLight() = default;

	ChangingLight(const relative_v3 &rel_pos, const mapblock_v3 &block_pos,
		MapBlock *b, direction source_dir) :
		rel_position(rel_pos),
		block_position(block_pos),
		block(b),
		source_direction(source_dir)
	{}
};

/*!
 * A fast, priority queue-like container to contain ChangingLights.
 * The ChangingLights are ordered by the given light levels.
 * The brightest ChangingLight is returned first.
 */
struct LightQueue {
	//! For each light level there is a vector.
	std::vector<ChangingLight> lights[LIGHT_SUN + 1];
	//! Light of the brightest ChangingLight in the queue.
	u8 max_light;

	/*!
	 * Creates a LightQueue.
	 * \param reserve for each light level that many slots are reserved.
	 */
	LightQueue(size_t reserve)
	{
		max_light = LIGHT_SUN;
		for (u8 i = 0; i <= LIGHT_SUN; i++) {
			lights[i].reserve(reserve);
		}
	}

	/*!
	 * Returns the next brightest ChangingLight and
	 * removes it from the queue.
	 * If there were no elements in the queue, the given parameters
	 * remain unmodified.
	 * \param light light level of the popped ChangingLight
	 * \param data the ChangingLight that was popped
	 * \returns true if there was a ChangingLight in the queue.
	 */
	bool next(u8 &light, ChangingLight &data)
	{
		while (lights[max_light].empty()) {
			if (max_light == 0) {
				return false;
			}
			max_light--;
		}
		light = max_light;
		data = lights[max_light].back();
		lights[max_light].pop_back();
		return true;
	}

	/*!
	 * Adds an element to the queue.
	 * The parameters are the same as in ChangingLight's constructor.
	 * \param light light level of the ChangingLight
	 */
	inline void push(u8 light, const relative_v3 &rel_pos,
		const mapblock_v3 &block_pos, MapBlock *block,
		direction source_dir)
	{
		assert(light <= LIGHT_SUN);
		lights[light].emplace_back(rel_pos, block_pos, block, source_dir);
	}
};

/*!
 * This type of light queue is for unlighting.
 * A node can be pushed in it only if its raw light is zero.
 * This prevents pushing nodes twice into this queue.
 * The light of the pushed ChangingLight must be the
 * light of the node before unlighting it.
 */
typedef LightQueue UnlightQueue;
/*!
 * This type of light queue is for spreading lights.
 * While spreading lights, all the nodes in it must
 * have the same light as the light level the ChangingLights
 * were pushed into this queue with. This prevents unnecessary
 * re-pushing of the nodes into the queue.
 * If a node doesn't let light trough but emits light, it can be added
 * too.
 */
typedef LightQueue ReLightQueue;

/*!
 * neighbor_dirs[i] points towards
 * the direction i.
 * See the definition of the type "direction"
 */
const static v3s16 neighbor_dirs[6] = {
	v3s16(1, 0, 0), // right
	v3s16(0, 1, 0), // top
	v3s16(0, 0, 1), // back
	v3s16(0, 0, -1), // front
	v3s16(0, -1, 0), // bottom
	v3s16(-1, 0, 0), // left
};

/*!
 * Transforms the given map block offset by one node towards
 * the specified direction.
 * \param dir the direction of the transformation
 * \param rel_pos the node's relative position in its map block
 * \param block_pos position of the node's block
 */
bool step_rel_block_pos(direction dir, relative_v3 &rel_pos,
	mapblock_v3 &block_pos)
{
	switch (dir) {
	case 0:
		if (rel_pos.X < MAP_BLOCKSIZE - 1) {
			rel_pos.X++;
		} else {
			rel_pos.X = 0;
			block_pos.X++;
			return true;
		}
		break;
	case 1:
		if (rel_pos.Y < MAP_BLOCKSIZE - 1) {
			rel_pos.Y++;
		} else {
			rel_pos.Y = 0;
			block_pos.Y++;
			return true;
		}
		break;
	case 2:
		if (rel_pos.Z < MAP_BLOCKSIZE - 1) {
			rel_pos.Z++;
		} else {
			rel_pos.Z = 0;
			block_pos.Z++;
			return true;
		}
		break;
	case 3:
		if (rel_pos.Z > 0) {
			rel_pos.Z--;
		} else {
			rel_pos.Z = MAP_BLOCKSIZE - 1;
			block_pos.Z--;
			return true;
		}
		break;
	case 4:
		if (rel_pos.Y > 0) {
			rel_pos.Y--;
		} else {
			rel_pos.Y = MAP_BLOCKSIZE - 1;
			block_pos.Y--;
			return true;
		}
		break;
	case 5:
		if (rel_pos.X > 0) {
			rel_pos.X--;
		} else {
			rel_pos.X = MAP_BLOCKSIZE - 1;
			block_pos.X--;
			return true;
		}
		break;
	}
	return false;
}

/*
 * Removes all light that is potentially emitted by the specified
 * light sources. These nodes will have zero light.
 * Returns all nodes whose light became zero but should be re-lighted.
 *
 * \param bank the light bank in which the procedure operates
 * \param from_nodes nodes whose light is removed
 * \param light_sources nodes that should be re-lighted
 * \param modified_blocks output, all modified map blocks are added to this
 */
void unspread_light(Map *map, const NodeDefManager *nodemgr, LightBank bank,
	UnlightQueue &from_nodes, ReLightQueue &light_sources,
	std::map<v3s16, MapBlock*> &modified_blocks)
{
	// Stores data popped from from_nodes
	u8 current_light;
	ChangingLight current;
	// Data of the current neighbor
	mapblock_v3 neighbor_block_pos;
	relative_v3 neighbor_rel_pos;
	// A dummy boolean
	bool is_valid_position;
	// Direction of the brightest neighbor of the node
	direction source_dir;
	while (from_nodes.next(current_light, current)) {
		// For all nodes that need unlighting

		// There is no brightest neighbor
		source_dir = 6;
		// The current node
		const MapNode &node = current.block->getNodeNoCheck(
			current.rel_position, &is_valid_position);
		const ContentFeatures &f = nodemgr->get(node);
		// If the node emits light, it behaves like it had a
		// brighter neighbor.
		u8 brightest_neighbor_light = f.light_source + 1;
		for (direction i = 0; i < 6; i++) {
			//For each neighbor

			// The node that changed this node has already zero light
			// and it can't give light to this node
			if (current.source_direction + i == 5) {
				continue;
			}
			// Get the neighbor's position and block
			neighbor_rel_pos = current.rel_position;
			neighbor_block_pos = current.block_position;
			MapBlock *neighbor_block;
			if (step_rel_block_pos(i, neighbor_rel_pos, neighbor_block_pos)) {
				neighbor_block = map->getBlockNoCreateNoEx(neighbor_block_pos);
				if (neighbor_block == NULL) {
					current.block->setLightingComplete(bank, i, false);
					continue;
				}
			} else {
				neighbor_block = current.block;
			}
			// Get the neighbor itself
			MapNode neighbor = neighbor_block->getNodeNoCheck(neighbor_rel_pos,
				&is_valid_position);
			const ContentFeatures &neighbor_f = nodemgr->get(
				neighbor.getContent());
			u8 neighbor_light = neighbor.getLightRaw(bank, neighbor_f);
			// If the neighbor has at least as much light as this node, then
			// it won't lose its light, since it should have been added to
			// from_nodes earlier, so its light would be zero.
			if (neighbor_f.light_propagates && neighbor_light < current_light) {
				// Unlight, but only if the node has light.
				if (neighbor_light > 0) {
					neighbor.setLight(bank, 0, neighbor_f);
					neighbor_block->setNodeNoCheck(neighbor_rel_pos, neighbor);
					from_nodes.push(neighbor_light, neighbor_rel_pos,
						neighbor_block_pos, neighbor_block, i);
					// The current node was modified earlier, so its block
					// is in modified_blocks.
					if (current.block != neighbor_block) {
						modified_blocks[neighbor_block_pos] = neighbor_block;
					}
				}
			} else {
				// The neighbor can light up this node.
				if (neighbor_light < neighbor_f.light_source) {
					neighbor_light = neighbor_f.light_source;
				}
				if (brightest_neighbor_light < neighbor_light) {
					brightest_neighbor_light = neighbor_light;
					source_dir = i;
				}
			}
		}
		// If the brightest neighbor is able to light up this node,
		// then add this node to the output nodes.
		if (brightest_neighbor_light > 1 && f.light_propagates) {
			brightest_neighbor_light--;
			light_sources.push(brightest_neighbor_light, current.rel_position,
				current.block_position, current.block,
				(source_dir == 6) ? 6 : 5 - source_dir
				/* with opposite direction*/);
		}
	}
}

/*
 * Spreads light from the specified starting nodes.
 *
 * Before calling this procedure, make sure that all ChangingLights
 * in light_sources have as much light on the map as they have in
 * light_sources (if the queue contains a node multiple times, the brightest
 * occurrence counts).
 *
 * \param bank the light bank in which the procedure operates
 * \param light_sources starting nodes
 * \param modified_blocks output, all modified map blocks are added to this
 */
void spread_light(Map *map, const NodeDefManager *nodemgr, LightBank bank,
	LightQueue &light_sources,
	std::map<v3s16, MapBlock*> &modified_blocks)
{
	// The light the current node can provide to its neighbors.
	u8 spreading_light;
	// The ChangingLight for the current node.
	ChangingLight current;
	// Position of the current neighbor.
	mapblock_v3 neighbor_block_pos;
	relative_v3 neighbor_rel_pos;
	// A dummy boolean.
	bool is_valid_position;
	while (light_sources.next(spreading_light, current)) {
		spreading_light--;
		for (direction i = 0; i < 6; i++) {
			// This node can't light up its light source
			if (current.source_direction + i == 5) {
				continue;
			}
			// Get the neighbor's position and block
			neighbor_rel_pos = current.rel_position;
			neighbor_block_pos = current.block_position;
			MapBlock *neighbor_block;
			if (step_rel_block_pos(i, neighbor_rel_pos, neighbor_block_pos)) {
				neighbor_block = map->getBlockNoCreateNoEx(neighbor_block_pos);
				if (neighbor_block == NULL) {
					current.block->setLightingComplete(bank, i, false);
					continue;
				}
			} else {
				neighbor_block = current.block;
			}
			// Get the neighbor itself
			MapNode neighbor = neighbor_block->getNodeNoCheck(neighbor_rel_pos,
				&is_valid_position);
			const ContentFeatures &f = nodemgr->get(neighbor.getContent());
			if (f.light_propagates) {
				// Light up the neighbor, if it has less light than it should.
				u8 neighbor_light = neighbor.getLightRaw(bank, f);
				if (neighbor_light < spreading_light) {
					neighbor.setLight(bank, spreading_light, f);
					neighbor_block->setNodeNoCheck(neighbor_rel_pos, neighbor);
					light_sources.push(spreading_light, neighbor_rel_pos,
						neighbor_block_pos, neighbor_block, i);
					// The current node was modified earlier, so its block
					// is in modified_blocks.
					if (current.block != neighbor_block) {
						modified_blocks[neighbor_block_pos] = neighbor_block;
					}
				}
			}
		}
	}
}

struct SunlightPropagationUnit{
	v2s16 relative_pos;
	bool is_sunlit;

	SunlightPropagationUnit(v2s16 relpos, bool sunlit):
		relative_pos(relpos),
		is_sunlit(sunlit)
	{}
};

struct SunlightPropagationData{
	std::vector<SunlightPropagationUnit> data;
	v3s16 target_block;
};

/*!
 * Returns true if the node gets sunlight from the
 * node above it.
 *
 * \param pos position of the node.
 */
bool is_sunlight_above(Map *map, v3s16 pos, const NodeDefManager *ndef)
{
	bool sunlight = true;
	mapblock_v3 source_block_pos;
	relative_v3 source_rel_pos;
	getNodeBlockPosWithOffset(pos + v3s16(0, 1, 0), source_block_pos,
		source_rel_pos);
	// If the node above has sunlight, this node also can get it.
	MapBlock *source_block = map->getBlockNoCreateNoEx(source_block_pos);
	if (source_block == NULL) {
		// But if there is no node above, then use heuristics
		MapBlock *node_block = map->getBlockNoCreateNoEx(getNodeBlockPos(pos));
		if (node_block == NULL) {
			sunlight = false;
		} else {
			sunlight = !node_block->getIsUnderground();
		}
	} else {
		bool is_valid_position;
		MapNode above = source_block->getNodeNoCheck(source_rel_pos,
			&is_valid_position);
		if (is_valid_position) {
			if (above.getContent() == CONTENT_IGNORE) {
				// Trust heuristics
				if (source_block->getIsUnderground()) {
					sunlight = false;
				}
			} else if (above.getLight(LIGHTBANK_DAY, ndef) != LIGHT_SUN) {
				// If the node above doesn't have sunlight, this
				// node is in shadow.
				sunlight = false;
			}
		}
	}
	return sunlight;
}

static const LightBank banks[] = { LIGHTBANK_DAY, LIGHTBANK_NIGHT };

void update_lighting_nodes(Map *map,
	std::vector<std::pair<v3s16, MapNode> > &oldnodes,
	std::map<v3s16, MapBlock*> &modified_blocks)
{
	const NodeDefManager *ndef = map->getNodeDefManager();
	// For node getter functions
	bool is_valid_position;

	// Process each light bank separately
	for (LightBank bank : banks) {
		UnlightQueue disappearing_lights(256);
		ReLightQueue light_sources(256);
		// Nodes that are brighter than the brightest modified node was
		// won't change, since they didn't get their light from a
		// modified node.
		u8 min_safe_light = 0;
		for (std::vector<std::pair<v3s16, MapNode> >::iterator it =
				oldnodes.begin(); it < oldnodes.end(); ++it) {
			u8 old_light = it->second.getLight(bank, ndef);
			if (old_light > min_safe_light) {
				min_safe_light = old_light;
			}
		}
		// If only one node changed, even nodes with the same brightness
		// didn't get their light from the changed node.
		if (oldnodes.size() > 1) {
			min_safe_light++;
		}
		// For each changed node process sunlight and initialize
		for (std::vector<std::pair<v3s16, MapNode> >::iterator it =
				oldnodes.begin(); it < oldnodes.end(); ++it) {
			// Get position and block of the changed node
			v3s16 p = it->first;
			relative_v3 rel_pos;
			mapblock_v3 block_pos;
			getNodeBlockPosWithOffset(p, block_pos, rel_pos);
			MapBlock *block = map->getBlockNoCreateNoEx(block_pos);
			if (block == NULL || block->isDummy()) {
				continue;
			}
			// Get the new node
			MapNode n = block->getNodeNoCheck(rel_pos, &is_valid_position);
			if (!is_valid_position) {
				break;
			}

			// Light of the old node
			u8 old_light = it->second.getLight(bank, ndef);

			// Add the block of the added node to modified_blocks
			modified_blocks[block_pos] = block;

			// Get new light level of the node
			u8 new_light = 0;
			if (ndef->get(n).light_propagates) {
				if (bank == LIGHTBANK_DAY && ndef->get(n).sunlight_propagates
					&& is_sunlight_above(map, p, ndef)) {
					new_light = LIGHT_SUN;
				} else {
					new_light = ndef->get(n).light_source;
					for (const v3s16 &neighbor_dir : neighbor_dirs) {
						v3s16 p2 = p + neighbor_dir;
						bool is_valid;
						MapNode n2 = map->getNode(p2, &is_valid);
						if (is_valid) {
							u8 spread = n2.getLight(bank, ndef);
							// If it is sure that the neighbor won't be
							// unlighted, its light can spread to this node.
							if (spread > new_light && spread >= min_safe_light) {
								new_light = spread - 1;
							}
						}
					}
				}
			} else {
				// If this is an opaque node, it still can emit light.
				new_light = ndef->get(n).light_source;
			}

			if (new_light > 0) {
				light_sources.push(new_light, rel_pos, block_pos, block, 6);


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