329 lines
7.9 KiB
C++
329 lines
7.9 KiB
C++
/*
|
|
* KiRouter - a push-and-(sometimes-)shove PCB router
|
|
*
|
|
* Copyright (C) 2013 CERN
|
|
* Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
|
|
*
|
|
* 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 3 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, see <http://www.gnu.or/licenses/>.
|
|
*/
|
|
|
|
#ifndef __DIRECTION_H
|
|
#define __DIRECTION_H
|
|
|
|
#include <geometry/seg.h>
|
|
#include <geometry/shape_line_chain.h>
|
|
|
|
/**
|
|
* Class DIRECTION_45.
|
|
* Represents route directions & corner angles in a 45-degree metric.
|
|
*/
|
|
|
|
class DIRECTION_45
|
|
{
|
|
public:
|
|
|
|
/**
|
|
* Enum Directions
|
|
* Represents available directions - there are 8 of them, as on a rectilinear map (north = up) +
|
|
* an extra undefined direction, reserved for traces that don't respect 45-degree routing regime.
|
|
*/
|
|
enum Directions
|
|
{
|
|
N = 0,
|
|
NE = 1,
|
|
E = 2,
|
|
SE = 3,
|
|
S = 4,
|
|
SW = 5,
|
|
W = 6,
|
|
NW = 7,
|
|
UNDEFINED = -1
|
|
};
|
|
|
|
/**
|
|
* Enum AngleType
|
|
* Represents kind of angle formed by vectors heading in two DIRECTION_45s.
|
|
*/
|
|
enum AngleType
|
|
{
|
|
ANG_OBTUSE = 0x01,
|
|
ANG_RIGHT = 0x02,
|
|
ANG_ACUTE = 0x04,
|
|
ANG_STRAIGHT = 0x08,
|
|
ANG_HALF_FULL = 0x10,
|
|
ANG_UNDEFINED = 0x20
|
|
};
|
|
|
|
DIRECTION_45( Directions aDir = UNDEFINED ) : m_dir( aDir ) {};
|
|
|
|
/**
|
|
* Constructor
|
|
* @param aVec vector, whose direction will be translated into a DIRECTION_45.
|
|
*/
|
|
DIRECTION_45( const VECTOR2I& aVec )
|
|
{
|
|
construct( aVec );
|
|
}
|
|
|
|
/**
|
|
* Constructor
|
|
* @param aSeg segment, whose direction will be translated into a DIRECTION_45.
|
|
*/
|
|
DIRECTION_45( const SEG& aSeg )
|
|
{
|
|
construct( aSeg.B - aSeg.A );
|
|
}
|
|
|
|
/**
|
|
* Function Format()
|
|
* Formats the direction in a human readable word.
|
|
* @return name of the direction
|
|
*/
|
|
const std::string Format() const
|
|
{
|
|
switch( m_dir )
|
|
{
|
|
case N:
|
|
return "north";
|
|
|
|
case NE:
|
|
return "north-east";
|
|
|
|
case E:
|
|
return "east";
|
|
|
|
case SE:
|
|
return "south-east";
|
|
|
|
case S:
|
|
return "south";
|
|
|
|
case SW:
|
|
return "south-west";
|
|
|
|
case W:
|
|
return "west";
|
|
|
|
case NW:
|
|
return "north-west";
|
|
|
|
case UNDEFINED:
|
|
return "undefined";
|
|
|
|
default:
|
|
return "<Error>";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Function Opposite()
|
|
* Returns a direction opposite (180 degree) to (this)
|
|
* @return opposite direction
|
|
*/
|
|
DIRECTION_45 Opposite() const
|
|
{
|
|
const Directions OppositeMap[] = { S, SW, W, NW, N, NE, E, SE, UNDEFINED };
|
|
return OppositeMap[m_dir];
|
|
}
|
|
|
|
/**
|
|
* Function Angle()
|
|
* Returns the type of angle between directions (this) and aOther.
|
|
* @param aOther direction to compare angle with
|
|
*/
|
|
AngleType Angle( const DIRECTION_45& aOther ) const
|
|
{
|
|
if( m_dir == UNDEFINED || aOther.m_dir == UNDEFINED )
|
|
return ANG_UNDEFINED;
|
|
|
|
int d = std::abs( m_dir - aOther.m_dir );
|
|
|
|
if( d == 1 || d == 7 )
|
|
return ANG_OBTUSE;
|
|
else if( d == 2 || d == 6 )
|
|
return ANG_RIGHT;
|
|
else if( d == 3 || d == 5 )
|
|
return ANG_ACUTE;
|
|
else if( d == 4 )
|
|
return ANG_HALF_FULL;
|
|
else
|
|
return ANG_STRAIGHT;
|
|
}
|
|
|
|
/**
|
|
* Function IsObtuse()
|
|
* @return true, when (this) forms an obtuse angle with aOther
|
|
*/
|
|
bool IsObtuse( const DIRECTION_45& aOther ) const
|
|
{
|
|
return Angle( aOther ) == ANG_OBTUSE;
|
|
}
|
|
|
|
/**
|
|
* Function IsDiagonal()
|
|
* Returns true if the direction is diagonal (e.g. North-West, South-East, etc)
|
|
* @return true, when diagonal.
|
|
*/
|
|
bool IsDiagonal() const
|
|
{
|
|
return ( m_dir % 2 ) == 1;
|
|
}
|
|
|
|
/**
|
|
* Function BuildInitialTrace()
|
|
*
|
|
* Builds a 2-segment line chain between points aP0 and aP1 and following 45-degree routing
|
|
* regime. If aStartDiagonal is true, the trace starts with a diagonal segment.
|
|
* @param aP0 starting point
|
|
* @param aP1 ending point
|
|
* @param aStartDiagonal whether the first segment has to be diagonal
|
|
* @return the trace
|
|
*/
|
|
const SHAPE_LINE_CHAIN BuildInitialTrace( const VECTOR2I& aP0,
|
|
const VECTOR2I& aP1,
|
|
bool aStartDiagonal = false ) const
|
|
{
|
|
int w = abs( aP1.x - aP0.x );
|
|
int h = abs( aP1.y - aP0.y );
|
|
int sw = sign( aP1.x - aP0.x );
|
|
int sh = sign( aP1.y - aP0.y );
|
|
|
|
VECTOR2I mp0, mp1;
|
|
|
|
// we are more horizontal than vertical?
|
|
if( w > h )
|
|
{
|
|
mp0 = VECTOR2I( (w - h) * sw, 0 ); // direction: E
|
|
mp1 = VECTOR2I( h * sw, h * sh ); // direction: NE
|
|
}
|
|
else
|
|
{
|
|
mp0 = VECTOR2I( 0, sh * (h - w) ); // direction: N
|
|
mp1 = VECTOR2I( sw * w, sh * w ); // direction: NE
|
|
}
|
|
|
|
bool start_diagonal;
|
|
|
|
if( m_dir == UNDEFINED )
|
|
start_diagonal = aStartDiagonal;
|
|
else
|
|
start_diagonal = IsDiagonal();
|
|
|
|
SHAPE_LINE_CHAIN pl;
|
|
|
|
pl.Append( aP0 );
|
|
|
|
if( start_diagonal )
|
|
pl.Append( aP0 + mp1 );
|
|
else
|
|
pl.Append( aP0 + mp0 );
|
|
|
|
pl.Append( aP1 );
|
|
pl.Simplify();
|
|
return pl;
|
|
};
|
|
|
|
bool operator==( const DIRECTION_45& aOther ) const
|
|
{
|
|
return aOther.m_dir == m_dir;
|
|
}
|
|
|
|
bool operator!=( const DIRECTION_45& aOther ) const
|
|
{
|
|
return aOther.m_dir != m_dir;
|
|
}
|
|
|
|
const DIRECTION_45 Right() const
|
|
{
|
|
DIRECTION_45 r;
|
|
|
|
r.m_dir = (Directions) (m_dir + 1);
|
|
|
|
if( r.m_dir == NW )
|
|
r.m_dir = N;
|
|
|
|
return r;
|
|
}
|
|
|
|
private:
|
|
|
|
template <typename T>
|
|
int sign( T val ) const
|
|
{
|
|
return (T( 0 ) < val) - ( val < T( 0 ) );
|
|
}
|
|
|
|
/**
|
|
* Function construct()
|
|
* Calculates the direction from a vector. If the vector's angle is not a multiple of 45
|
|
* degrees, the direction is rounded to the nearest octant.
|
|
* @param aVec our vector
|
|
*/
|
|
void construct( const VECTOR2I& aVec )
|
|
{
|
|
m_dir = UNDEFINED;
|
|
|
|
if( aVec.x == 0 && aVec.y == 0 )
|
|
return;
|
|
|
|
double mag = 360.0 - ( 180.0 / M_PI * atan2( (double) aVec.y, (double) aVec.x ) ) + 90.0;
|
|
|
|
if( mag >= 360.0 )
|
|
mag -= 360.0;
|
|
|
|
if( mag < 0.0 )
|
|
mag += 360.0;
|
|
|
|
m_dir = (Directions)( ( mag + 22.5 ) / 45.0 );
|
|
|
|
if( m_dir >= 8 )
|
|
m_dir = (Directions)( m_dir - 8 );
|
|
|
|
if( m_dir < 0 )
|
|
m_dir = (Directions)( m_dir + 8 );
|
|
|
|
return;
|
|
|
|
if( aVec.y < 0 )
|
|
{
|
|
if( aVec.x > 0 )
|
|
m_dir = NE;
|
|
else if( aVec.x < 0 )
|
|
m_dir = NW;
|
|
else
|
|
m_dir = N;
|
|
}
|
|
else if( aVec.y == 0 )
|
|
{
|
|
if( aVec.x > 0 )
|
|
m_dir = E;
|
|
else
|
|
m_dir = W;
|
|
}
|
|
else // aVec.y>0
|
|
{
|
|
if( aVec.x > 0 )
|
|
m_dir = SE;
|
|
else if( aVec.x < 0 )
|
|
m_dir = SW;
|
|
else
|
|
m_dir = S;
|
|
}
|
|
}
|
|
|
|
Directions m_dir; ///> our actual direction
|
|
};
|
|
|
|
#endif // __DIRECTION_H
|