287 lines
9.1 KiB
C++
287 lines
9.1 KiB
C++
/********************************************************/
|
|
/* magnetic_tracks_functions.cpp */
|
|
/********************************************************/
|
|
|
|
/* functions used to controle the cursor position, when creating a track
|
|
* and when the "magnetic tracks" option is on
|
|
* (the current created track is kept near existing tracks
|
|
* the distance is the clearance between tracks)
|
|
*/
|
|
|
|
#include "fctsys.h"
|
|
#include "common.h"
|
|
#include "pcbnew.h"
|
|
#include "wxPcbStruct.h"
|
|
#include "class_board_design_settings.h"
|
|
#include "protos.h"
|
|
#include "pcbnew_id.h"
|
|
|
|
|
|
/**
|
|
* Function Join
|
|
* finds the point where line segment (b1,b0) intersects with segment (a1,a0).
|
|
* If that point would be outside of (a0,a1), the respective endpoint is used.
|
|
* Join returns the point in "res" and "true" if a suitable point was found,
|
|
* "false" if both lines are parallel or if the length of either segment is zero.
|
|
*/
|
|
static bool Join( wxPoint* res, wxPoint a0, wxPoint a1, wxPoint b0, wxPoint b1 )
|
|
{
|
|
/* References:
|
|
http://local.wasp.uwa.edu.au/~pbourke/geometry/lineline2d/
|
|
http://www.gekkou.co.uk/blogs/monologues/2007/12/13/1197586800000.html
|
|
*/
|
|
|
|
double denom;
|
|
double t;
|
|
|
|
// if either segment is zero length
|
|
if( a1.x==a0.x && a1.y==a0.y )
|
|
return false;
|
|
|
|
if( b1.x==b0.x && b1.y==b0.y )
|
|
return false;
|
|
|
|
a1 -= a0;
|
|
b1 -= b0;
|
|
|
|
b0 -= a0;
|
|
|
|
denom = (double) b1.y * a1.x - (double) b1.x * a1.y;
|
|
if( !denom )
|
|
{
|
|
return false; // parallel
|
|
}
|
|
|
|
t = ((double) b1.y * b0.x - (double) b1.x * b0.y ) / denom;
|
|
|
|
t = min( max( t, 0.0 ), 1.0 );
|
|
|
|
res->x = wxRound( a0.x + t * a1.x );
|
|
res->y = wxRound( a0.y + t * a1.y );
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/*
|
|
* "Project" finds the projection of a grid point on a track. This is the point
|
|
* from where we want to draw new orthogonal tracks when starting on a track.
|
|
*/
|
|
bool Project( wxPoint* res, wxPoint on_grid, const TRACK* track )
|
|
{
|
|
if( track->m_Start == track->m_End )
|
|
return false;
|
|
|
|
wxPoint vec = track->m_End - track->m_Start;
|
|
|
|
double t = double( on_grid.x - track->m_Start.x ) * vec.x +
|
|
double( on_grid.y - track->m_Start.y ) * vec.y;
|
|
|
|
t /= (double) vec.x * vec.x + (double) vec.y * vec.y;
|
|
t = min( max( t, 0.0 ), 1.0 );
|
|
|
|
res->x = wxRound( track->m_Start.x + t * vec.x );
|
|
res->y = wxRound( track->m_Start.y + t * vec.y );
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/**
|
|
* Function Magnetize
|
|
* tests to see if there are any magnetic items within near reach of the given
|
|
* "curpos". If yes, then curpos is adjusted appropriately according to that
|
|
* near magnetic item and true is returned.
|
|
* @param m_Pcb = the current board
|
|
* @param frame = the current frame
|
|
* @param aCurrentTool = the current tool id (from vertical right toolbar)
|
|
* @param grid = the grid size
|
|
* @param on_grid = TODO
|
|
* @param curpos The initial position, and what to adjust if a change is needed.
|
|
* @return bool - true if the position was adjusted magnetically, else false.
|
|
*/
|
|
bool Magnetize( BOARD* m_Pcb, PCB_EDIT_FRAME* frame, int aCurrentTool, wxSize grid,
|
|
wxPoint on_grid, wxPoint* curpos )
|
|
{
|
|
bool doCheckNet = g_MagneticPadOption != capture_always && Drc_On;
|
|
bool doTrack = false;
|
|
bool doPad = false;
|
|
bool amMovingVia = false;
|
|
|
|
TRACK* currTrack = g_CurrentTrackSegment;
|
|
BOARD_ITEM* currItem = frame->GetCurItem();
|
|
PCB_SCREEN* screen = frame->GetScreen();
|
|
wxPoint pos = screen->RefPos( true );
|
|
|
|
// D( printf( "currTrack=%p currItem=%p currTrack->Type()=%d currItem->Type()=%d\n", currTrack, currItem, currTrack ? currTrack->Type() : 0, currItem ? currItem->Type() : 0 ); )
|
|
|
|
if( !currTrack && currItem && currItem->Type()==TYPE_VIA && currItem->m_Flags )
|
|
{
|
|
// moving a VIA
|
|
currTrack = (TRACK*) currItem;
|
|
amMovingVia = true;
|
|
|
|
return false; // comment this return out and play with it.
|
|
}
|
|
else if( currItem != currTrack )
|
|
{
|
|
currTrack = NULL;
|
|
}
|
|
|
|
|
|
if( g_MagneticPadOption == capture_always )
|
|
doPad = true;
|
|
|
|
if( g_MagneticTrackOption == capture_always )
|
|
doTrack = true;
|
|
|
|
if( aCurrentTool == ID_TRACK_BUTT || amMovingVia )
|
|
{
|
|
int q = capture_cursor_in_track_tool;
|
|
|
|
if( g_MagneticPadOption == q )
|
|
doPad = true;
|
|
|
|
if( g_MagneticTrackOption == q )
|
|
doTrack = true;
|
|
}
|
|
|
|
// D(printf("doPad=%d doTrack=%d aCurrentTool=%d amMovingVia=%d\n", doPad, doTrack, aCurrentTool, amMovingVia );)
|
|
|
|
// The search precedence order is pads, then tracks/vias
|
|
|
|
if( doPad )
|
|
{
|
|
int layer_mask = g_TabOneLayerMask[screen->m_Active_Layer];
|
|
D_PAD* pad = Locate_Any_Pad( m_Pcb, pos, layer_mask );
|
|
|
|
if( pad )
|
|
{
|
|
if( doCheckNet && currTrack && currTrack->GetNet() != pad->GetNet() )
|
|
return false;
|
|
|
|
*curpos = pad->m_Pos;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// after pads, only track & via tests remain, skip them if not desired
|
|
if( doTrack )
|
|
{
|
|
int layer = screen->m_Active_Layer;
|
|
|
|
for( TRACK* via = m_Pcb->m_Track;
|
|
via && (via = Locate_Via_Area( via, *curpos, layer )) != NULL;
|
|
via = via->Next() )
|
|
{
|
|
if( via != currTrack ) // a via cannot influence itself
|
|
{
|
|
if( !doCheckNet || !currTrack || currTrack->GetNet() == via->GetNet() )
|
|
{
|
|
*curpos = via->m_Start;
|
|
// D(printf("via hit\n");)
|
|
return true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
//D( printf( "skipping self\n" ); )
|
|
}
|
|
}
|
|
|
|
if( !currTrack )
|
|
{
|
|
int layer_mask = g_TabOneLayerMask[layer];
|
|
|
|
TRACK* track = Locate_Pistes( m_Pcb, m_Pcb->m_Track, pos, layer_mask );
|
|
|
|
if( !track || track->Type() != TYPE_TRACK )
|
|
{
|
|
// D(printf("!currTrack and track=%p not found, layer_mask=0x%X\n", track, layer_mask );)
|
|
return false;
|
|
}
|
|
|
|
// D( printf( "Project\n" ); )
|
|
return Project( curpos, on_grid, track );
|
|
}
|
|
|
|
/*
|
|
* In two segment mode, ignore the final segment if it's inside a grid
|
|
* square.
|
|
*/
|
|
if( !amMovingVia && currTrack && g_TwoSegmentTrackBuild && currTrack->Back()
|
|
&& currTrack->m_Start.x - grid.x < currTrack->m_End.x
|
|
&& currTrack->m_Start.x + grid.x > currTrack->m_End.x
|
|
&& currTrack->m_Start.y - grid.y < currTrack->m_End.y
|
|
&& currTrack->m_Start.y + grid.y > currTrack->m_End.y )
|
|
{
|
|
currTrack = currTrack->Back();
|
|
}
|
|
|
|
|
|
for( TRACK* track = m_Pcb->m_Track; track; track = track->Next() )
|
|
{
|
|
if( track->Type() != TYPE_TRACK )
|
|
continue;
|
|
|
|
if( doCheckNet && currTrack && currTrack->GetNet() != track->GetNet() )
|
|
continue;
|
|
|
|
if( m_Pcb->IsLayerVisible( track->GetLayer() ) == false )
|
|
continue;
|
|
|
|
// omit the layer check if moving a via
|
|
if( !amMovingVia && !track->IsOnLayer( layer ) )
|
|
continue;
|
|
|
|
if( !track->HitTest( *curpos ) )
|
|
continue;
|
|
|
|
D(printf( "have track prospect\n");)
|
|
|
|
if( Join( curpos, track->m_Start, track->m_End, currTrack->m_Start, currTrack->m_End ) )
|
|
{
|
|
// D(printf( "join currTrack->Type()=%d\n", currTrack->Type() );)
|
|
return true;
|
|
}
|
|
|
|
if( aCurrentTool == ID_TRACK_BUTT || amMovingVia )
|
|
{
|
|
// At this point we have a drawing mouse on a track, we are drawing
|
|
// a new track and that new track is parallel to the track the
|
|
// mouse is on. Find the nearest end point of the track under mouse
|
|
// to the mouse and return that.
|
|
double distStart = hypot( double( curpos->x - track->m_Start.x ),
|
|
double( curpos->y - track->m_Start.y ));
|
|
|
|
double distEnd = hypot( double( curpos->x - track->m_End.x ),
|
|
double( curpos->y - track->m_End.y ));
|
|
|
|
// if track not via, or if its a via dragging but not with its adjacent track
|
|
if( currTrack->Type() != TYPE_VIA
|
|
|| ( currTrack->m_Start != track->m_Start && currTrack->m_Start != track->m_End ))
|
|
{
|
|
if( distStart <= currTrack->m_Width/2 )
|
|
{
|
|
// D(printf("nearest end is start\n");)
|
|
*curpos = track->m_Start;
|
|
return true;
|
|
}
|
|
|
|
if( distEnd <= currTrack->m_Width/2 )
|
|
{
|
|
// D(printf("nearest end is end\n");)
|
|
*curpos = track->m_End;
|
|
return true;
|
|
}
|
|
|
|
// @todo otherwise confine curpos such that it stays centered
|
|
// within "track"
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|