cpp/openttd-patchpack/source Files · src/newgrf_canal.cpp

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Location: cpp/openttd-patchpack/source/src/newgrf_canal.cpp

r6888:f2ab5d0e6596 2.1 KiB text/x-c Show Annotation Show as Raw Download as Raw

rubidium

(svn r10131) -Fix [FS#810]: when removing a dock, a ship will always try to reach the old location of the dock even when it cannot anymore because it the old location of the dock is now land instead of water.

/* $Id$ */

#include "stdafx.h"
#include "openttd.h"
#include "variables.h"
#include "landscape.h"
#include "debug.h"
#include "newgrf.h"
#include "newgrf_callbacks.h"
#include "newgrf_spritegroup.h"
#include "newgrf_canal.h"


/** Table of canal 'feature' sprite groups */
const SpriteGroup *_canal_sg[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 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) {
		case 0x80:
			return TileHeight(tile);

		case 0x81:
			return ((_opt.landscape == LT_ARCTIC && GetTileZ(tile) > GetSnowLine()) ? 4 : 0) |
			       (_opt.landscape == LT_TROPIC ? GetTropicZone(tile) : 0);
	}

	DEBUG(grf, 1, "Unhandled canal property 0x%02X", variable);

	*available = false;
	return 0;
}


static const SpriteGroup *CanalResolveReal(const ResolverObject *object, const SpriteGroup *group)
{
	if (group->g.real.num_loaded == 0) return NULL;

	return group->g.real.loaded[0];
}


static void NewCanalResolver(ResolverObject *res, TileIndex tile)
{
	res->GetRandomBits = &CanalGetRandomBits;
	res->GetTriggers   = &CanalGetTriggers;
	res->SetTriggers   = &CanalSetTriggers;
	res->GetVariable   = &CanalGetVariable;
	res->ResolveReal   = &CanalResolveReal;

	res->u.canal.tile = tile;

	res->callback        = 0;
	res->callback_param1 = 0;
	res->callback_param2 = 0;
	res->last_value      = 0;
	res->trigger         = 0;
	res->reseed          = 0;
}


SpriteID GetCanalSprite(CanalFeature feature, TileIndex tile)
{
	ResolverObject object;
	const SpriteGroup *group;

	NewCanalResolver(&object, tile);

	group = Resolve(_canal_sg[feature], &object);
	if (group == NULL || group->type != SGT_RESULT) return 0;

	return group->g.result.sprite;
}