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/**
* @file dist.cpp
* @brief Routines to calculate PCB editor auto routing distances.
*/
/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 1992-2012 KiCad Developers, see AUTHORS.txt for contributors.
*
* First copyright (C) Randy Nevin, 1989 (see PCBCA package)
*
* This program 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; either version 2
* of the License, or (at your option) any later version.
*
* This program 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. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <autorout.h>
#include <cell.h>
/* The tables of distances and keep out areas are established on the basis of a
* 50 units grid size (the pitch between the cells is 50 units).
* The actual distance could be computed by a scaling factor, but this is
* not needed, we can use only reduced values
*/
/* calculate approximate distance (manhattan distance)
*/
int MATRIX_ROUTING_HEAD::GetApxDist( int r1, int c1, int r2, int c2 )
{
int d1, d2; /* row and column deltas */
if( ( d1 = r1 - r2 ) < 0 ) /* get absolute row delta */
d1 = -d1;
if( ( d2 = c1 - c2 ) < 0 ) /* get absolute column delta */
d2 = -d2;
return ( d1+d2 ) * 50;
}
/* distance to go thru a cell (en mils) */
static const int dist[10][10] =
{ /* OT=Otherside, OR=Origin (source) cell */
/*..........N, NE, E, SE, S, SW, W, NW, OT, OR */
/* N */ { 50, 60, 35, 60, 99, 60, 35, 60, 12, 12 },
/* NE */ { 60, 71, 60, 71, 60, 99, 60, 71, 23, 23 },
/* E */ { 35, 60, 50, 60, 35, 60, 99, 60, 12, 12 },
/* SE */ { 60, 71, 60, 71, 60, 71, 60, 99, 23, 23 },
/* S */ { 99, 60, 35, 60, 50, 60, 35, 60, 12, 12 },
/* SW */ { 60, 99, 60, 71, 60, 71, 60, 71, 23, 23 },
/* W */ { 35, 60, 99, 60, 35, 60, 50, 60, 12, 12 },
/* NW */ { 60, 71, 60, 99, 60, 71, 60, 71, 23, 23 },
/* OT */ { 12, 23, 12, 23, 12, 23, 12, 23, 99, 99 },
/* OR */ { 99, 99, 99, 99, 99, 99, 99, 99, 99, 99 }
};
/* penalty for extraneous holes and corners, scaled by sharpness of turn */
static const int penalty[10][10] =
{ /* OT=Otherside, OR=Origin (source) cell */
/*......... N, NE, E, SE, S, SW, W, NW, OT, OR */
/* N */ { 0, 5, 10, 15, 20, 15, 10, 5, 50, 0 },
/* NE */ { 5, 0, 5, 10, 15, 20, 15, 10, 50, 0 },
/* E */ { 10, 5, 0, 5, 10, 15, 20, 15, 50, 0 },
/* SE */ { 15, 10, 5, 0, 5, 10, 15, 20, 50, 0 },
/* S */ { 20, 15, 10, 5, 0, 5, 10, 15, 50, 0 },
/* SW */ { 15, 20, 15, 10, 5, 0, 5, 10, 50, 0 },
/* W */ { 10, 15, 20, 15, 10, 5, 0, 5, 50, 0 },
/* NW */ { 5, 10, 15, 20, 15, 10, 5, 0, 50, 0 },
/* OT */ { 50, 50, 50, 50, 50, 50, 50, 50, 100, 0 },
/* OR */ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
};
/* penalty pour directions preferencielles */
#define PN 20
static const int dir_penalty_TOP[10][10] =
{
/* OT=Otherside, OR=Origin (source) cell */
/*......... N, NE, E, SE, S, SW, W, NW, OT, OR */
/* N */ { PN, 0, 0, 0, PN, 0, 0, 0, 0, 0 },
/* NE */ { PN, 0, 0, 0, PN, 0, 0, 0, 0, 0 },
/* E */ { PN, 0, 0, 0, PN, 0, 0, 0, 0, 0 },
/* SE */ { PN, 0, 0, 0, PN, 0, 0, 0, 0, 0 },
/* S */ { PN, 0, 0, 0, PN, 0, 0, 0, 0, 0 },
/* SW */ { PN, 0, 0, 0, PN, 0, 0, 0, 0, 0 },
/* W */ { PN, 0, 0, 0, PN, 0, 0, 0, 0, 0 },
/* NW */ { PN, 0, 0, 0, PN, 0, 0, 0, 0, 0 },
/* OT */ { PN, 0, 0, 0, PN, 0, 0, 0, 0, 0 },
/* OR */ { PN, 0, 0, 0, PN, 0, 0, 0, 0, 0 }
};
static int dir_penalty_BOTTOM[10][10] =
{
/* OT=Otherside, OR=Origin (source) cell */
/*......... N, NE, E, SE, S, SW, W, NW, OT, OR */
/* N */ { 0, 0, PN, 0, 0, 0, PN, 0, 0, 0 },
/* NE */ { 0, 0, PN, 0, 0, 0, PN, 0, 0, 0 },
/* E */ { 0, 0, PN, 0, 0, 0, PN, 0, 0, 0 },
/* SE */ { 0, 0, PN, 0, 0, 0, PN, 0, 0, 0 },
/* S */ { 0, 0, PN, 0, 0, 0, PN, 0, 0, 0 },
/* SW */ { 0, 0, PN, 0, 0, 0, PN, 0, 0, 0 },
/* W */ { 0, 0, PN, 0, 0, 0, PN, 0, 0, 0 },
/* NW */ { 0, 0, PN, 0, 0, 0, PN, 0, 0, 0 },
/* OT */ { 0, 0, PN, 0, 0, 0, PN, 0, 0, 0 },
/* OR */ { 0, 0, PN, 0, 0, 0, PN, 0, 0, 0 }
};
/*
** x is the direction to enter the cell of interest.
** y is the direction to exit the cell of interest.
** z is the direction to really exit the cell, if y=FROM_OTHERSIDE.
**
** return the distance of the trace through the cell of interest.
** the calculation is driven by the tables above.
*/
/* calculate distance (with penalty) of a trace through a cell
*/
int MATRIX_ROUTING_HEAD::CalcDist(int x,int y,int z ,int side )
{
int adjust, ldist;
adjust = 0; /* set if hole is encountered */
if( x == EMPTY )
x = 10;
if( y == EMPTY )
{
y = 10;
}
else if( y == FROM_OTHERSIDE )
{
if( z == EMPTY )
z = 10;
adjust = penalty[x-1][z-1];
}
ldist = dist[x-1][y-1] + penalty[x-1][y-1] + adjust;
if( m_RouteCount > 1 )
{
if( side == BOTTOM )
ldist += dir_penalty_TOP[x-1][y-1];
if( side == TOP )
ldist += dir_penalty_BOTTOM[x-1][y-1];
}
return ldist * 10;
}
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