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Location: cpp/openttd-patchpack/source/src/animated_tile.cpp - annotation
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(svn r16583) -Update: the order of the language files so it's in sync with english.txt. Normally WT2 would do this, but only with activity for those languages. Now we'd like to the order to match so we can more easily spot import bugs while developing WT3.
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/** @file animated_tile.cpp Everything related to animated tiles. */
#include "stdafx.h"
#include "core/alloc_func.hpp"
#include "functions.h"
/** The table/list with animated tiles. */
TileIndex *_animated_tile_list = NULL;
/** The number of animated tiles in the current state. */
uint _animated_tile_count = 0;
/** The number of slots for animated tiles allocated currently. */
uint _animated_tile_allocated = 0;
/**
* Removes the given tile from the animated tile table.
* @param tile the tile to remove
*/
void DeleteAnimatedTile(TileIndex tile)
{
for (TileIndex *ti = _animated_tile_list; ti < _animated_tile_list + _animated_tile_count; ti++) {
if (tile == *ti) {
/* Remove the hole
* The order of the remaining elements must stay the same, otherwise the animation loop
* may miss a tile; that's why we must use memmove instead of just moving the last element.
*/
memmove(ti, ti + 1, (_animated_tile_list + _animated_tile_count - (ti + 1)) * sizeof(*ti));
_animated_tile_count--;
MarkTileDirtyByTile(tile);
return;
}
}
}
/**
* Add the given tile to the animated tile table (if it does not exist
* on that table yet). Also increases the size of the table if necessary.
* @param tile the tile to make animated
*/
void AddAnimatedTile(TileIndex tile)
{
MarkTileDirtyByTile(tile);
for (const TileIndex *ti = _animated_tile_list; ti < _animated_tile_list + _animated_tile_count; ti++) {
if (tile == *ti) return;
}
/* Table not large enough, so make it larger */
if (_animated_tile_count == _animated_tile_allocated) {
_animated_tile_allocated *= 2;
_animated_tile_list = ReallocT<TileIndex>(_animated_tile_list, _animated_tile_allocated);
}
_animated_tile_list[_animated_tile_count] = tile;
_animated_tile_count++;
}
/**
* Animate all tiles in the animated tile list, i.e.\ call AnimateTile on them.
*/
void AnimateAnimatedTiles()
{
const TileIndex *ti = _animated_tile_list;
while (ti < _animated_tile_list + _animated_tile_count) {
const TileIndex curr = *ti;
AnimateTile(curr);
/* During the AnimateTile call, DeleteAnimatedTile could have been called,
* deleting an element we've already processed and pushing the rest one
* slot to the left. We can detect this by checking whether the index
* in the current slot has changed - if it has, an element has been deleted,
* and we should process the current slot again instead of going forward.
* NOTE: this will still break if more than one animated tile is being
* deleted during the same AnimateTile call, but no code seems to
* be doing this anyway.
*/
if (*ti == curr) ++ti;
}
}
/**
* Initialize all animated tile variables to some known begin point
*/
void InitializeAnimatedTiles()
{
_animated_tile_list = ReallocT<TileIndex>(_animated_tile_list, 256);
_animated_tile_count = 0;
_animated_tile_allocated = 256;
}
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