equal
deleted
inserted
replaced
114 { |
114 { |
115 return (RoadBits)(ROAD_ALL ^ r); |
115 return (RoadBits)(ROAD_ALL ^ r); |
116 } |
116 } |
117 |
117 |
118 /** |
118 /** |
|
119 * Calculate the mirrored RoadBits |
|
120 * |
|
121 * Simply move the bits to their new position. |
|
122 * |
|
123 * @param r The given RoadBits value |
|
124 * @return the mirrored |
|
125 */ |
|
126 static inline RoadBits MirrorRoadBits(RoadBits r) |
|
127 { |
|
128 return (RoadBits)(GB(r, 0, 2) << 2 | GB(r, 2, 2)); |
|
129 } |
|
130 |
|
131 /** |
|
132 * Calculate rotated RoadBits |
|
133 * |
|
134 * Move the Roadbits clockwise til they are in their final position. |
|
135 * |
|
136 * @param r The given RoadBits value |
|
137 * @param rot The given Rotation angle |
|
138 * @return the rotated |
|
139 */ |
|
140 static inline RoadBits RotateRoadBits(RoadBits r, DiagDirDiff rot) |
|
141 { |
|
142 for (; rot > (DiagDirDiff)0; rot--){ |
|
143 r = (RoadBits)(GB(r, 0, 1) << 3 | GB(r, 1, 3)); |
|
144 } |
|
145 return r; |
|
146 } |
|
147 |
|
148 /** |
119 * Create the road-part which belongs to the given DiagDirection |
149 * Create the road-part which belongs to the given DiagDirection |
120 * |
150 * |
121 * This function returns a RoadBits value which belongs to |
151 * This function returns a RoadBits value which belongs to |
122 * the given DiagDirection. |
152 * the given DiagDirection. |
123 * |
153 * |
126 */ |
156 */ |
127 static inline RoadBits DiagDirToRoadBits(DiagDirection d) |
157 static inline RoadBits DiagDirToRoadBits(DiagDirection d) |
128 { |
158 { |
129 return (RoadBits)(ROAD_NW << (3 ^ d)); |
159 return (RoadBits)(ROAD_NW << (3 ^ d)); |
130 } |
160 } |
|
161 |
|
162 /** |
|
163 * Return if the tile is a valid tile for a crossing. |
|
164 * |
|
165 * @note function is overloaded |
|
166 * @param tile the curent tile |
|
167 * @param ax the axis of the road over the rail |
|
168 * @return true if it is a valid tile |
|
169 */ |
|
170 bool IsPossibleCrossing(const TileIndex tile, Axis ax); |
131 |
171 |
132 /** |
172 /** |
133 * Checks whether the trackdir means that we are reversing. |
173 * Checks whether the trackdir means that we are reversing. |
134 * @param dir the trackdir to check |
174 * @param dir the trackdir to check |
135 * @return true if it is a reversing road trackdir |
175 * @return true if it is a reversing road trackdir |
146 */ |
186 */ |
147 static inline bool IsStraightRoadTrackdir(Trackdir dir) |
187 static inline bool IsStraightRoadTrackdir(Trackdir dir) |
148 { |
188 { |
149 return (dir & 0x06) == 0; |
189 return (dir & 0x06) == 0; |
150 } |
190 } |
|
191 |
|
192 /** |
|
193 * Clean up unneccesary RoadBits of a planed tile. |
|
194 * @param tile current tile |
|
195 * @param org_rb planed RoadBits |
|
196 * @return optimised RoadBits |
|
197 */ |
|
198 RoadBits CleanUpRoadBits(const TileIndex tile, RoadBits org_rb); |
151 |
199 |
152 /** |
200 /** |
153 * Is it allowed to remove the given road bits from the given tile? |
201 * Is it allowed to remove the given road bits from the given tile? |
154 * @param tile the tile to remove the road from |
202 * @param tile the tile to remove the road from |
155 * @param remove the roadbits that are going to be removed |
203 * @param remove the roadbits that are going to be removed |