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330 lines
8.5 KiB
C++
330 lines
8.5 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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#pragma once
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#include "irrlichttypes_bloated.h"
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#include "light.h"
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#include "util/pointer.h"
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#include <string>
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#include <vector>
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class NodeDefManager;
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class Map;
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/*
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Naming scheme:
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- Material = irrlicht's Material class
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- Content = (content_t) content of a node
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- Tile = TileSpec at some side of a node of some content type
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*/
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typedef u16 content_t;
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#define CONTENT_MAX UINT16_MAX
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/*
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The maximum node ID that can be registered by mods. This must
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be significantly lower than the maximum content_t value, so that
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there is enough room for dummy node IDs, which are created when
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a MapBlock containing unknown node names is loaded from disk.
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*/
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#define MAX_REGISTERED_CONTENT 0x7fffU
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/*
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A solid walkable node with the texture unknown_node.png.
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For example, used on the client to display unregistered node IDs
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(instead of expanding the vector of node definitions each time
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such a node is received).
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*/
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#define CONTENT_UNKNOWN 125
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/*
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The common material through which the player can walk and which
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is transparent to light
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*/
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#define CONTENT_AIR 126
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/*
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Ignored node.
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Unloaded chunks are considered to consist of this. Several other
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methods return this when an error occurs. Also, during
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map generation this means the node has not been set yet.
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Doesn't create faces with anything and is considered being
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out-of-map in the game map.
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*/
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#define CONTENT_IGNORE 127
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/*
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Content lighting information that fits into a single byte.
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*/
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struct ContentLightingFlags {
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u8 light_source : 4;
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bool has_light : 1;
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bool light_propagates : 1;
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bool sunlight_propagates : 1;
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bool operator==(const ContentLightingFlags &other) const
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{
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return has_light == other.has_light && light_propagates == other.light_propagates &&
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sunlight_propagates == other.sunlight_propagates &&
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light_source == other.light_source;
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}
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bool operator!=(const ContentLightingFlags &other) const { return !(*this == other); }
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};
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static_assert(sizeof(ContentLightingFlags) == 1, "Unexpected ContentLightingFlags size");
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enum LightBank
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{
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LIGHTBANK_DAY,
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LIGHTBANK_NIGHT
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};
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/*
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Simple rotation enum.
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*/
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enum Rotation {
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ROTATE_0,
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ROTATE_90,
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ROTATE_180,
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ROTATE_270,
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ROTATE_RAND,
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};
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/*
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Masks for MapNode.param2 of flowing liquids
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*/
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#define LIQUID_LEVEL_MASK 0x07
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#define LIQUID_FLOW_DOWN_MASK 0x08
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//#define LIQUID_LEVEL_MASK 0x3f // better finite water
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//#define LIQUID_FLOW_DOWN_MASK 0x40 // not used when finite water
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/* maximum amount of liquid in a block */
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#define LIQUID_LEVEL_MAX LIQUID_LEVEL_MASK
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#define LIQUID_LEVEL_SOURCE (LIQUID_LEVEL_MAX+1)
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#define LIQUID_INFINITY_MASK 0x80 //0b10000000
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// mask for leveled nodebox param2
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#define LEVELED_MASK 0x7F
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#define LEVELED_MAX LEVELED_MASK
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struct ContentFeatures;
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/*
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This is the stuff what the whole world consists of.
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*/
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struct alignas(u32) MapNode
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{
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/*
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Main content
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*/
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u16 param0;
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/*
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Misc parameter. Initialized to 0.
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- For light_propagates() blocks, this is light intensity,
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stored logarithmically from 0 to LIGHT_MAX.
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Sunlight is LIGHT_SUN, which is LIGHT_MAX+1.
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- Contains 2 values, day- and night lighting. Each takes 4 bits.
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- Uhh... well, most blocks have light or nothing in here.
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*/
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u8 param1;
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/*
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The second parameter. Initialized to 0.
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E.g. direction for torches and flowing water.
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*/
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u8 param2;
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MapNode() = default;
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MapNode(content_t content, u8 a_param1=0, u8 a_param2=0) noexcept
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: param0(content),
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param1(a_param1),
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param2(a_param2)
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{ }
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bool operator==(const MapNode &other) const noexcept
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{
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return (param0 == other.param0
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&& param1 == other.param1
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&& param2 == other.param2);
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}
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// To be used everywhere
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content_t getContent() const noexcept
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{
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return param0;
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}
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void setContent(content_t c) noexcept
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{
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param0 = c;
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}
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u8 getParam1() const noexcept
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{
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return param1;
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}
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void setParam1(u8 p) noexcept
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{
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param1 = p;
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}
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u8 getParam2() const noexcept
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{
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return param2;
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}
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void setParam2(u8 p) noexcept
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{
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param2 = p;
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}
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/*!
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* Returns the color of the node.
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*
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* \param f content features of this node
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* \param color output, contains the node's color.
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*/
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void getColor(const ContentFeatures &f, video::SColor *color) const;
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inline void setLight(LightBank bank, u8 a_light, ContentLightingFlags f) noexcept
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{
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// If node doesn't contain light data, ignore this
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if (!f.has_light)
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return;
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if (bank == LIGHTBANK_DAY) {
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param1 &= 0xf0;
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param1 |= a_light & 0x0f;
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} else {
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assert(bank == LIGHTBANK_NIGHT);
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param1 &= 0x0f;
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param1 |= (a_light & 0x0f)<<4;
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}
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}
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/**
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* Check if the light value for night differs from the light value for day.
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*
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* @return If the light values are equal, returns true; otherwise false
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*/
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inline bool isLightDayNightEq(ContentLightingFlags f) const noexcept
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{
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return !f.has_light || getLight(LIGHTBANK_DAY, f) == getLight(LIGHTBANK_NIGHT, f);
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}
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inline u8 getLight(LightBank bank, ContentLightingFlags f) const noexcept
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{
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u8 raw_light = getLightRaw(bank, f);
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return MYMAX(f.light_source, raw_light);
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}
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/*!
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* Returns the node's light level from param1.
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* If the node emits light, it is ignored.
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* \param f the ContentLightingFlags of this node.
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*/
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inline u8 getLightRaw(LightBank bank, ContentLightingFlags f) const noexcept
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{
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if(f.has_light)
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return bank == LIGHTBANK_DAY ? param1 & 0x0f : (param1 >> 4) & 0x0f;
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return 0;
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}
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// 0 <= daylight_factor <= 1000
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// 0 <= return value <= LIGHT_SUN
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u8 getLightBlend(u32 daylight_factor, ContentLightingFlags f) const
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{
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u8 lightday = getLight(LIGHTBANK_DAY, f);
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u8 lightnight = getLight(LIGHTBANK_NIGHT, f);
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return blend_light(daylight_factor, lightday, lightnight);
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}
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u8 getFaceDir(const NodeDefManager *nodemgr, bool allow_wallmounted = false) const;
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u8 getWallMounted(const NodeDefManager *nodemgr) const;
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v3s16 getWallMountedDir(const NodeDefManager *nodemgr) const;
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/// @returns Rotation in range 0–239 (in 1.5° steps)
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u8 getDegRotate(const NodeDefManager *nodemgr) const;
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void rotateAlongYAxis(const NodeDefManager *nodemgr, Rotation rot);
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/*!
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* Checks which neighbors does this node connect to.
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*
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* \param p coordinates of the node
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*/
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u8 getNeighbors(v3s16 p, Map *map) const;
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/*
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Gets list of node boxes (used for rendering (NDT_NODEBOX))
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*/
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void getNodeBoxes(const NodeDefManager *nodemgr, std::vector<aabb3f> *boxes,
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u8 neighbors = 0) const;
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/*
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Gets list of selection boxes
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*/
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void getSelectionBoxes(const NodeDefManager *nodemg,
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std::vector<aabb3f> *boxes, u8 neighbors = 0) const;
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/*
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Gets list of collision boxes
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*/
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void getCollisionBoxes(const NodeDefManager *nodemgr,
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std::vector<aabb3f> *boxes, u8 neighbors = 0) const;
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/*
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Liquid/leveled helpers
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*/
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u8 getMaxLevel(const NodeDefManager *nodemgr) const;
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u8 getLevel(const NodeDefManager *nodemgr) const;
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s8 setLevel(const NodeDefManager *nodemgr, s16 level = 1);
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s8 addLevel(const NodeDefManager *nodemgr, s16 add = 1);
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/*
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Serialization functions
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*/
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static u32 serializedLength(u8 version);
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void serialize(u8 *dest, u8 version) const;
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void deSerialize(u8 *source, u8 version);
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// Serializes or deserializes a list of nodes in bulk format (first the
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// content of all nodes, then the param1 of all nodes, then the param2
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// of all nodes).
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// version = serialization version. Must be >= 22
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// content_width = the number of bytes of content per node
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// params_width = the number of bytes of params per node
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// compressed = true to zlib-compress output
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static SharedBuffer<u8> serializeBulk(int version,
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const MapNode *nodes, u32 nodecount,
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u8 content_width, u8 params_width);
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static void deSerializeBulk(std::istream &is, int version,
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MapNode *nodes, u32 nodecount,
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u8 content_width, u8 params_width);
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private:
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// Deprecated serialization methods
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void deSerialize_pre22(const u8 *source, u8 version);
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};
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