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@ -15,50 +15,58 @@
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#include "newgrf_canal.h"
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#include "water_map.h"
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/** Table of canal 'feature' sprite groups */
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WaterFeature _water_feature[CF_END];
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struct CanalScopeResolver : public ScopeResolver {
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TileIndex tile;
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/* Random bits and triggers are not supported for canals, so the following
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* three functions are stubs. */
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static uint32 CanalGetRandomBits(const ResolverObject *object)
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{
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/* Return random bits only for water tiles, not station tiles */
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return IsTileType(object->u.canal.tile, MP_WATER) ? GetWaterTileRandomBits(object->u.canal.tile) : 0;
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}
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CanalScopeResolver(ResolverObject *ro, TileIndex tile);
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/* virtual */ uint32 GetRandomBits() const;
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/* virtual */ uint32 GetVariable(byte variable, uint32 parameter, bool *available) const;
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};
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static uint32 CanalGetTriggers(const ResolverObject *object)
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{
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return 0;
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}
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/** Resolver object for canals. */
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struct CanalResolverObject : public ResolverObject {
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CanalScopeResolver canal_scope;
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CanalResolverObject(const GRFFile *grffile, TileIndex tile,
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CallbackID callback = CBID_NO_CALLBACK, uint32 callback_param1 = 0, uint32 callback_param2 = 0);
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static void CanalSetTriggers(const ResolverObject *object, int triggers)
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{
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return;
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}
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/* virtual */ ScopeResolver *GetScope(VarSpriteGroupScope scope = VSG_SCOPE_SELF, byte relative = 0)
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{
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switch (scope) {
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case VSG_SCOPE_SELF: return &this->canal_scope;
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default: return &this->default_scope; // XXX ResolverObject::GetScope(scope, relative);
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}
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}
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/* virtual */ const SpriteGroup *ResolveReal(const RealSpriteGroup *group) const;
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};
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static uint32 CanalGetVariable(const ResolverObject *object, byte variable, uint32 parameter, bool *available)
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/* virtual */ uint32 CanalScopeResolver::GetRandomBits() const
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{
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TileIndex tile = object->u.canal.tile;
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/* Return random bits only for water tiles, not station tiles */
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return IsTileType(this->tile, MP_WATER) ? GetWaterTileRandomBits(this->tile) : 0;
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}
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/* virtual */ uint32 CanalScopeResolver::GetVariable(byte variable, uint32 parameter, bool *available) const
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{
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switch (variable) {
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/* Height of tile */
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case 0x80: {
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int z = GetTileZ(tile);
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int z = GetTileZ(this->tile);
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/* Return consistent height within locks */
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if (IsTileType(tile, MP_WATER) && IsLock(tile) && GetLockPart(tile) == LOCK_PART_UPPER) z--;
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if (IsTileType(this->tile, MP_WATER) && IsLock(this->tile) && GetLockPart(this->tile) == LOCK_PART_UPPER) z--;
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return z;
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}
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/* Terrain type */
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case 0x81: return GetTerrainType(tile);
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case 0x81: return GetTerrainType(this->tile);
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/* Random data for river or canal tiles, otherwise zero */
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case 0x83: return IsTileType(tile, MP_WATER) ? GetWaterTileRandomBits(tile) : 0;
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case 0x83: return IsTileType(this->tile, MP_WATER) ? GetWaterTileRandomBits(this->tile) : 0;
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}
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DEBUG(grf, 1, "Unhandled canal variable 0x%02X", variable);
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@ -68,47 +76,38 @@ static uint32 CanalGetVariable(const ResolverObject *object, byte variable, uint
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}
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static const SpriteGroup *CanalResolveReal(const ResolverObject *object, const RealSpriteGroup *group)
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/* virtual */ const SpriteGroup *CanalResolverObject::ResolveReal(const RealSpriteGroup *group) const
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{
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if (group->num_loaded == 0) return NULL;
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return group->loaded[0];
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}
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static void NewCanalResolver(ResolverObject *res, TileIndex tile, const GRFFile *grffile)
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CanalScopeResolver::CanalScopeResolver(ResolverObject *ro, TileIndex tile) : ScopeResolver(ro)
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{
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res->GetRandomBits = &CanalGetRandomBits;
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res->GetTriggers = &CanalGetTriggers;
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res->SetTriggers = &CanalSetTriggers;
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res->GetVariable = &CanalGetVariable;
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res->ResolveRealMethod = &CanalResolveReal;
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res->u.canal.tile = tile;
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res->callback = CBID_NO_CALLBACK;
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res->callback_param1 = 0;
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res->callback_param2 = 0;
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res->ResetState();
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res->grffile = grffile;
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this->tile = tile;
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}
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/**
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* @param tile Tile index of canal.
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* @param grffile Grf file.
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*/
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CanalResolverObject::CanalResolverObject(const GRFFile *grffile, TileIndex tile,
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CallbackID callback, uint32 callback_param1, uint32 callback_param2)
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: ResolverObject(grffile, callback, callback_param1, callback_param2), canal_scope(this, tile)
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{
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}
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/**
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* Lookup the base sprite to use for a canal.
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* @param feature Which canal feature we want.
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* @param tile Tile index of canal, if appropriate.
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* @return Base sprite returned by GRF, or 0 if none.
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* @return Base sprite returned by GRF, or \c 0 if none.
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*/
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SpriteID GetCanalSprite(CanalFeature feature, TileIndex tile)
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{
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ResolverObject object;
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const SpriteGroup *group;
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NewCanalResolver(&object, tile, _water_feature[feature].grffile);
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group = SpriteGroup::Resolve(_water_feature[feature].group, &object);
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CanalResolverObject object(_water_feature[feature].grffile, tile);
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const SpriteGroup *group = SpriteGroup::Resolve(_water_feature[feature].group, &object);
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if (group == NULL) return 0;
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return group->GetResult();
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@ -121,20 +120,12 @@ SpriteID GetCanalSprite(CanalFeature feature, TileIndex tile)
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* @param param2 Callback parameter 2.
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* @param feature For which feature to run the callback.
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* @param tile Tile index of canal.
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* @return Callback result or CALLBACK_FAILED if the callback failed.
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* @return Callback result or #CALLBACK_FAILED if the callback failed.
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*/
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static uint16 GetCanalCallback(CallbackID callback, uint32 param1, uint32 param2, CanalFeature feature, TileIndex tile)
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{
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ResolverObject object;
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const SpriteGroup *group;
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NewCanalResolver(&object, tile, _water_feature[feature].grffile);
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object.callback = callback;
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object.callback_param1 = param1;
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object.callback_param2 = param2;
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group = SpriteGroup::Resolve(_water_feature[feature].group, &object);
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CanalResolverObject object(_water_feature[feature].grffile, tile, callback, param1, param2);
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const SpriteGroup *group = SpriteGroup::Resolve(_water_feature[feature].group, &object);
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if (group == NULL) return CALLBACK_FAILED;
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return group->GetCallbackResult();
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