Changeset - r17130:b566a5a5d36c
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master
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smatz - 13 years ago 2011-01-21 16:13:54
smatz@openttd.org
(svn r21878) -Codechange: move parts of UpdateInclination() to separate functions
1 file changed with 31 insertions and 13 deletions:
0 comments (0 inline, 0 general)
src/ground_vehicle.hpp
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@@ -106,16 +106,13 @@ struct GroundVehicle : public Specialize
 
	}
 

	
 
	/**
 
	 * Checks if the vehicle is in a slope and sets the required flags in that case.
 
	 * @param new_tile True if the vehicle reached a new tile.
 
	 * @param turned Indicates if the vehicle has turned.
 
	 * @return Old height of the vehicle.
 
	 * Updates vehicle's Z position and inclination.
 
	 * Used when the vehicle entered given tile.
 
	 * @pre The vehicle has to be at (or near to) a border of the tile,
 
	 *      directed towards tile centre
 
	 */
 
	FORCEINLINE byte UpdateInclination(bool new_tile, bool turned)
 
	FORCEINLINE void UpdateZPositionAndInclination()
 
	{
 
		byte old_z = this->z_pos;
 

	
 
		if (new_tile) {
 
			this->z_pos = GetSlopeZ(this->x_pos, this->y_pos);
 
			ClrBit(this->gv_flags, GVF_GOINGUP_BIT);
 
			ClrBit(this->gv_flags, GVF_GOINGDOWN_BIT);
 
@@ -125,15 +122,20 @@ struct GroundVehicle : public Specialize
 
				 * direction it is sloped, we get the 'z' at the center of
 
				 * the tile (middle_z) and the edge of the tile (old_z),
 
				 * which we then can compare. */
 
				static const int INV_TILE_SIZE_MASK = ~(TILE_SIZE - 1);
 

	
 
				byte middle_z = GetSlopeZ((this->x_pos & INV_TILE_SIZE_MASK) | HALF_TILE_SIZE, (this->y_pos & INV_TILE_SIZE_MASK) | HALF_TILE_SIZE);
 
			byte middle_z = GetSlopeZ((this->x_pos & ~TILE_UNIT_MASK) | HALF_TILE_SIZE, (this->y_pos & ~TILE_UNIT_MASK) | HALF_TILE_SIZE);
 

	
 
				if (middle_z != this->z_pos) {
 
					SetBit(this->gv_flags, (middle_z > old_z) ? GVF_GOINGUP_BIT : GVF_GOINGDOWN_BIT);
 
				SetBit(this->gv_flags, (middle_z > this->z_pos) ? GVF_GOINGUP_BIT : GVF_GOINGDOWN_BIT);
 
			}
 
				}
 
			}
 
		} else {
 

	
 
	/**
 
	 * Updates vehicle's Z position.
 
	 * Inclination can't change in the middle of a tile.
 
	 */
 
	FORCEINLINE void UpdateZPosition()
 
	{
 
			/* Flat tile, tile with two opposing corners raised and tile with 3 corners
 
			 * raised can never have sloped track ... */
 
			static const uint32 never_sloped = 1 << SLOPE_FLAT | 1 << SLOPE_EW | 1 << SLOPE_NS | 1 << SLOPE_NWS | 1 << SLOPE_WSE | 1 << SLOPE_SEN | 1 << SLOPE_ENW;
 
@@ -147,6 +149,22 @@ struct GroundVehicle : public Specialize
 
			}
 
		}
 

	
 
	/**
 
	 * Checks if the vehicle is in a slope and sets the required flags in that case.
 
	 * @param new_tile True if the vehicle reached a new tile.
 
	 * @param turned Indicates if the vehicle has turned.
 
	 * @return Old height of the vehicle.
 
	 */
 
	FORCEINLINE byte UpdateInclination(bool new_tile, bool turned)
 
	{
 
		byte old_z = this->z_pos;
 

	
 
		if (new_tile) {
 
			this->UpdateZPositionAndInclination();
 
		} else {
 
			this->UpdateZPosition();
 
		}
 

	
 
		this->UpdateViewport(true, turned);
 
		return old_z;
 
	}
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