mirror of
https://github.com/JGRennison/OpenTTD-patches.git
synced 2024-11-11 13:10:45 +00:00
104 lines
2.4 KiB
C++
104 lines
2.4 KiB
C++
/* $Id$ */
|
|
|
|
/** @file newgrf_canal.cpp Implementation of NewGRF canals. */
|
|
|
|
#include "stdafx.h"
|
|
#include "core/overflowsafe_type.hpp"
|
|
#include "tile_type.h"
|
|
#include "debug.h"
|
|
#include "newgrf_commons.h"
|
|
#include "newgrf_spritegroup.h"
|
|
#include "newgrf_canal.h"
|
|
#include "tile_map.h"
|
|
#include "water_map.h"
|
|
|
|
|
|
/** Table of canal 'feature' sprite groups */
|
|
WaterFeature _water_feature[CF_END];
|
|
|
|
|
|
/* Random bits and triggers are not supported for canals, so the following
|
|
* three functions are stubs. */
|
|
static uint32 CanalGetRandomBits(const ResolverObject *object)
|
|
{
|
|
/* Return random bits only for water tiles, not station tiles */
|
|
return IsTileType(object->u.canal.tile, MP_WATER) ? GetWaterTileRandomBits(object->u.canal.tile) : 0;
|
|
}
|
|
|
|
|
|
static uint32 CanalGetTriggers(const ResolverObject *object)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void CanalSetTriggers(const ResolverObject *object, int triggers)
|
|
{
|
|
return;
|
|
}
|
|
|
|
|
|
static uint32 CanalGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
|
|
{
|
|
TileIndex tile = object->u.canal.tile;
|
|
|
|
switch (variable) {
|
|
/* Height of tile */
|
|
case 0x80: return GetTileZ(tile) / TILE_HEIGHT;
|
|
|
|
/* Terrain type */
|
|
case 0x81: return GetTerrainType(tile);
|
|
|
|
/* Random data for river or canal tiles, otherwise zero */
|
|
case 0x83: return GetWaterTileRandomBits(tile);
|
|
}
|
|
|
|
DEBUG(grf, 1, "Unhandled canal property 0x%02X", variable);
|
|
|
|
*available = false;
|
|
return UINT_MAX;
|
|
}
|
|
|
|
|
|
static const SpriteGroup *CanalResolveReal(const ResolverObject *object, const RealSpriteGroup *group)
|
|
{
|
|
if (group->num_loaded == 0) return NULL;
|
|
|
|
return group->loaded[0];
|
|
}
|
|
|
|
|
|
static void NewCanalResolver(ResolverObject *res, TileIndex tile, const GRFFile *grffile)
|
|
{
|
|
res->GetRandomBits = &CanalGetRandomBits;
|
|
res->GetTriggers = &CanalGetTriggers;
|
|
res->SetTriggers = &CanalSetTriggers;
|
|
res->GetVariable = &CanalGetVariable;
|
|
res->ResolveReal = &CanalResolveReal;
|
|
|
|
res->u.canal.tile = tile;
|
|
|
|
res->callback = CBID_NO_CALLBACK;
|
|
res->callback_param1 = 0;
|
|
res->callback_param2 = 0;
|
|
res->last_value = 0;
|
|
res->trigger = 0;
|
|
res->reseed = 0;
|
|
res->count = 0;
|
|
res->grffile = grffile;
|
|
}
|
|
|
|
|
|
SpriteID GetCanalSprite(CanalFeature feature, TileIndex tile)
|
|
{
|
|
ResolverObject object;
|
|
const SpriteGroup *group;
|
|
|
|
NewCanalResolver(&object, tile, _water_feature[feature].grffile);
|
|
|
|
group = SpriteGroup::Resolve(_water_feature[feature].group, &object);
|
|
if (group == NULL) return 0;
|
|
|
|
return group->GetResult();
|
|
}
|