src/newgrf_object.h

   1 /* $Id: newgrf_object.h 26085 2013-11-24 14:41:19Z frosch $ */
   2
   3 /*
   4  * This file is part of OpenTTD.
   5  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
   6  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   7  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   8  */
   9
  10 /** @file newgrf_object.h Functions related to NewGRF objects. */
  11
  12 #ifndef NEWGRF_OBJECT_H
  13 #define NEWGRF_OBJECT_H
  14
  15 #include "newgrf_callbacks.h"
  16 #include "newgrf_spritegroup.h"
  17 #include "newgrf_town.h"
  18 #include "economy_func.h"
  19 #include "date_type.h"
  20 #include "object_type.h"
  21 #include "newgrf_animation_type.h"
  22 #include "newgrf_class.h"
  23 #include "newgrf_commons.h"
  24
  25 /** Various object behaviours. */
  26 enum ObjectFlags {
  27         OBJECT_FLAG_NONE               =       0, ///< Just nothing.
  28         OBJECT_FLAG_ONLY_IN_SCENEDIT   = 1 <<  0, ///< Object can only be constructed in the scenario editor.
  29         OBJECT_FLAG_CANNOT_REMOVE      = 1 <<  1, ///< Object can not be removed.
  30         OBJECT_FLAG_AUTOREMOVE         = 1 <<  2, ///< Object get automatically removed (like "owned land").
  31         OBJECT_FLAG_BUILT_ON_WATER     = 1 <<  3, ///< Object can be built on water (not required).
  32         OBJECT_FLAG_CLEAR_INCOME       = 1 <<  4, ///< When object is cleared a positive income is generated instead of a cost.
  33         OBJECT_FLAG_HAS_NO_FOUNDATION  = 1 <<  5, ///< Do not display foundations when on a slope.
  34         OBJECT_FLAG_ANIMATION          = 1 <<  6, ///< Object has animated tiles.
  35         OBJECT_FLAG_ONLY_IN_GAME       = 1 <<  7, ///< Object can only be built in game.
  36         OBJECT_FLAG_2CC_COLOUR         = 1 <<  8, ///< Object wants 2CC colour mapping.
  37         OBJECT_FLAG_NOT_ON_LAND        = 1 <<  9, ///< Object can not be on land, implicitly sets #OBJECT_FLAG_BUILT_ON_WATER.
  38         OBJECT_FLAG_DRAW_WATER         = 1 << 10, ///< Object wants to be drawn on water.
  39         OBJECT_FLAG_ALLOW_UNDER_BRIDGE = 1 << 11, ///< Object can built under a bridge.
  40         OBJECT_FLAG_ANIM_RANDOM_BITS   = 1 << 12, ///< Object wants random bits in "next animation frame" callback.
  41         OBJECT_FLAG_SCALE_BY_WATER     = 1 << 13, ///< Object count is roughly scaled by water amount at edges.
  42 };
  43 DECLARE_ENUM_AS_BIT_SET(ObjectFlags)
  44
  45 void ResetObjects();
  46
  47 /** Class IDs for objects. */
  48 enum ObjectClassID {
  49         OBJECT_CLASS_BEGIN   =    0, ///< The lowest valid value
  50         OBJECT_CLASS_MAX     = 0xFF, ///< Maximum number of classes.
  51         INVALID_OBJECT_CLASS = 0xFF, ///< Class for the less fortunate.
  52 };
  53 /** Allow incrementing of ObjectClassID variables */
  54 DECLARE_POSTFIX_INCREMENT(ObjectClassID)
  55
  56 /** An object that isn't use for transport, industries or houses.
  57  * @note If you change this struct, adopt the initialization of
  58  * default objects in table/object_land.h
  59  */
  60 struct ObjectSpec {
  61         /* 2 because of the "normal" and "buy" sprite stacks. */
  62         GRFFilePropsBase<2> grf_prop; ///< Properties related the the grf file
  63         ObjectClassID cls_id;         ///< The class to which this spec belongs.
  64         StringID name;                ///< The name for this object.
  65
  66         uint8 climate;                ///< In which climates is this object available?
  67         uint8 size;                   ///< The size of this objects; low nibble for X, high nibble for Y.
  68         uint8 build_cost_multiplier;  ///< Build cost multiplier per tile.
  69         uint8 clear_cost_multiplier;  ///< Clear cost multiplier per tile.
  70         Date introduction_date;       ///< From when can this object be built.
  71         Date end_of_life_date;        ///< When can't this object be built anymore.
  72         ObjectFlags flags;            ///< Flags/settings related to the object.
  73         AnimationInfo animation;      ///< Information about the animation.
  74         uint16 callback_mask;         ///< Bitmask of requested/allowed callbacks.
  75         uint8 height;                 ///< The height of this structure, in heightlevels; max MAX_TILE_HEIGHT.
  76         uint8 views;                  ///< The number of views.
  77         uint8 generate_amount;        ///< Number of objects which are attempted to be generated per 256^2 map during world generation.
  78         bool enabled;                 ///< Is this spec enabled?
  79
  80         /**
  81          * Get the cost for building a structure of this type.
  82          * @return The cost for building.
  83          */
  84         Money GetBuildCost() const { return GetPrice(PR_BUILD_OBJECT, this->build_cost_multiplier, this->grf_prop.grffile, 0); }
  85
  86         /**
  87          * Get the cost for clearing a structure of this type.
  88          * @return The cost for clearing.
  89          */
  90         Money GetClearCost() const { return GetPrice(PR_CLEAR_OBJECT, this->clear_cost_multiplier, this->grf_prop.grffile, 0); }
  91
  92         bool IsEverAvailable() const;
  93         bool WasEverAvailable() const;
  94         bool IsAvailable() const;
  95         uint Index() const;
  96
  97         static const ObjectSpec *Get(ObjectType index);
  98         static const ObjectSpec *GetByTile(TileIndex tile);
  99 };
 100
 101 /** Object scope resolver. */
 102 struct ObjectScopeResolver : public ScopeResolver {
 103         struct Object *obj; ///< The object the callback is ran for.
 104         TileIndex tile;     ///< The tile related to the object.
 105         uint8 view;         ///< The view of the object.
 106
 107         /**
 108          * Constructor of an object scope resolver.
 109          * @param ro Surrounding resolver.
 110          * @param obj Object being resolved.
 111          * @param tile %Tile of the object.
 112          * @param view View of the object.
 113          */
 114         ObjectScopeResolver(ResolverObject &ro, Object *obj, TileIndex tile, uint8 view = 0)
 115                 : ScopeResolver(ro), obj(obj), tile(tile), view(view)
 116         {
 117         }
 118
 119         /* virtual */ uint32 GetRandomBits() const;
 120         /* virtual */ uint32 GetVariable(byte variable, uint32 parameter, bool *available) const;
 121 };
 122
 123 /** A resolver object to be used with feature 0F spritegroups. */
 124 struct ObjectResolverObject : public ResolverObject {
 125         ObjectScopeResolver object_scope; ///< The object scope resolver.
 126         TownScopeResolver *town_scope;    ///< The town scope resolver (created on the first call).
 127
 128         ObjectResolverObject(const ObjectSpec *spec, Object *o, TileIndex tile, uint8 view = 0,
 129                         CallbackID callback = CBID_NO_CALLBACK, uint32 param1 = 0, uint32 param2 = 0);
 130         ~ObjectResolverObject();
 131
 132         /* virtual */ ScopeResolver *GetScope(VarSpriteGroupScope scope = VSG_SCOPE_SELF, byte relative = 0)
 133         {
 134                 switch (scope) {
 135                         case VSG_SCOPE_SELF:
 136                                 return &this->object_scope;
 137
 138                         case VSG_SCOPE_PARENT: {
 139                                 TownScopeResolver *tsr = this->GetTown();
 140                                 if (tsr != NULL) return tsr;
 141                         }
 142                         FALLTHROUGH;
 143
 144                         default:
 145                                 return ResolverObject::GetScope(scope, relative);
 146                 }
 147         }
 148
 149 private:
 150         TownScopeResolver *GetTown();
 151 };
 152
 153 /** Struct containing information relating to object classes. */
 154 typedef NewGRFClass<ObjectSpec, ObjectClassID, OBJECT_CLASS_MAX> ObjectClass;
 155
 156 /** Mapping of purchase for objects. */
 157 static const CargoID CT_PURCHASE_OBJECT = 1;
 158
 159 uint16 GetObjectCallback(CallbackID callback, uint32 param1, uint32 param2, const ObjectSpec *spec, Object *o, TileIndex tile, uint8 view = 0);
 160
 161 void DrawNewObjectTile(TileInfo *ti, const ObjectSpec *spec);
 162 void DrawNewObjectTileInGUI(int x, int y, const ObjectSpec *spec, uint8 view);
 163 void AnimateNewObjectTile(TileIndex tile);
 164 void TriggerObjectTileAnimation(Object *o, TileIndex tile, ObjectAnimationTrigger trigger, const ObjectSpec *spec);
 165 void TriggerObjectAnimation(Object *o, ObjectAnimationTrigger trigger, const ObjectSpec *spec);
 166
 167 #endif /* NEWGRF_OBJECT_H */