forked from mirror/openmw-tes3mp
Added LAND, PGRD and CELL
Nicolay Korslund
15 years ago
parent
5cfe2e2de0
commit
514fe3795a
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#ifndef _ESM_CELL_H
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#define _ESM_CELL_H
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#include "esm_reader.hpp"
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namespace ESM {
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/* Cells hold data about objects, creatures, statics (rocks, walls,
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* buildings) and landscape (for exterior cells). Cells frequently
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* also has other associated LAND and PGRD records. Combined, all this
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* data can be huge, and we cannot load it all at startup. Instead,
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* the strategy we use is to remember the file position of each cell
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* (using ESMReader::getContext()) and jumping back into place
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* whenever we need to load a given cell.
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*/
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struct Cell
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{
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enum Flags
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{
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Interior = 0x01, // Interior cell
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HasWater = 0x02, // Does this cell have a water surface
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NoSleep = 0x04, // Is it allowed to sleep here (without a bed)
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QuasiEx = 0x80 // Behave like exterior (Tribunal+), with
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// skybox and weather
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};
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struct DATAstruct
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{
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int flags;
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int gridX, gridY;
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};
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// Interior cells are indexed by this (it's the 'id'), for exterior
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// cells it is optional.
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std::string name,
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// Optional region name for exterior cells.
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region;
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// File position
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ESM_Context context;
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DATAstruct data;
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void load(ESMReader &esm)
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{
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// This is implicit?
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//name = esm.getHNString("NAME");
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// Ignore this for now, I assume it might mean we delete the entire cell?
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if(esm.isNextSub("DELE")) esm.skipHSub();
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esm.getHNT(data, "DATA", 12);
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// Save position and move on
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context = esm.getContext();
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esm.skipRecord();
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region = esm.getHNOString("RGNN");
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}
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};
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}
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#endif
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@ -0,0 +1,52 @@
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#ifndef _ESM_LAND_H
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#define _ESM_LAND_H
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#include "esm_reader.hpp"
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namespace ESM {
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/*
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* Landscape data.
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*/
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struct Land
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{
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int flags; // Only first four bits seem to be used, don't know what
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// they mean.
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int X, Y; // Map coordinates.
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// File context. This allows the ESM reader to be 'reset' to this
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// location later when we are ready to load the full data set.
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ESM_Context context;
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bool hasData;
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void load(ESMReader &esm)
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{
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// Get the grid location
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esm.getSubNameIs("INTV");
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esm.getT(X);
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esm.getT(Y);
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esm.getHNT(flags, "DATA");
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// Store the file position
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context = esm.getContext();
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hasData = false;
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int cnt;
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// Skip these here. Load the actual data when the cell is loaded.
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if(esm.isNextSub("VNML")) {esm.skipHSubSize(12675);cnt++;}
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if(esm.isNextSub("VHGT")) {esm.skipHSubSize(4232);cnt++;}
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if(esm.isNextSub("WNAM")) esm.skipHSubSize(81);
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if(esm.isNextSub("VCLR")) esm.skipHSubSize(12675);
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if(esm.isNextSub("VTEX")) {esm.skipHSubSize(512);cnt++;}
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// We need all three of VNML, VHGT and VTEX in order to use the
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// landscape.
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hasData = (cnt == 3);
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}
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};
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}
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#endif
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@ -0,0 +1,56 @@
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#ifndef _ESM_PGRD_H
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#define _ESM_PGRD_H
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#include "esm_reader.hpp"
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namespace ESM {
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/*
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* Path grid.
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*/
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struct PathGrid
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{
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struct DATAstruct
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{
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int x, y; // Grid location, matches cell for exterior cells
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short s1; // ?? Usually but not always a power of 2. Doesn't seem
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// to have any relation to the size of PGRC.
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short s2; // Number of path points? Size of PGRP block is always 16 * s2;
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}; // 12 bytes
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std::string cell; // Cell name
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DATAstruct data;
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ESM_Context context; // Context so we can return here later and
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// finish the job
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void load(ESMReader &esm)
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{
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esm.getHNT(data, "DATA", 12);
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cell = esm.getHNString("NAME");
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// Remember this file position
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context = esm.getContext();
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// Check that the sizes match up. Size = 16 * s2 (path points?)
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if(esm.isNextSub("PGRP"))
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{
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esm.skipHSub();
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int size = esm.getSubSize();
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if(size != 16*data.s2)
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esm.fail("Path grid table size mismatch");
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}
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// Size varies. Path grid chances? Connections? Multiples of 4
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// suggest either int or two shorts, or perhaps a float. Study
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// it later.
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if(esm.isNextSub("PGRC"))
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{
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esm.skipHSub();
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int size = esm.getSubSize();
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if(size % 4 != 0)
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esm.fail("PGRC size not a multiple of 4");
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}
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}
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};
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}
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#endif
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