fix for magnetic tracks for parallel case, cleanup of original patches

change_log.txt

@@ -5,6 +5,12 @@ Started 2007-June-11
 Please add newer entries at the top, list the date and your name with
 email address.
 
+2008-Feb-29 UPDATE   Dick Hollenbeck <dick@softplc.com>
+================================================================================
++pcbnew
+    controle.cpp: fixed the magnetic track if tracks are parallel.
+
+
 2008-Feb-29 UPDATE Jean-Pierre Charras <jean-pierre.charras@inpg.fr>
 ================================================================================
 +eeschema
@@ -12,7 +18,6 @@ email address.
     Use carefully because this can change the whole schematic structure.
     Gen Bom List now works in unicode build version
     (label list generation crashed eeschema in unicode build version)
-
 +all
     Display filename and full sheet name ("sheet path") in sheet reference
     the full sheet name has no meanning in pcbnew.
@@ -52,8 +57,6 @@ email address.
     Need work to solve this problem and keep the undo/redo feature.
 
 
-
-
 2008-Feb-25 UPDATE   Wayne Stambaugh <stambaughw{at}verizon{dot}net>
 ================================================================================
 +eeschema

eeschema/controle.cpp

@@ -294,6 +294,7 @@ void WinEDA_DrawFrame::GeneralControle( wxDC* DC, wxPoint MousePositionInPixels
 
     case WXK_NUMPAD2:       /* Deplacement curseur vers le bas */
     case WXK_DOWN:
+        D(printf("DOWN\n");)
         MousePositionInPixels.y += delta.y;
         DrawPanel->MouseTo( MousePositionInPixels );
         break;

pcbnew/controle.cpp

@@ -219,14 +219,20 @@ BOARD_ITEM* WinEDA_BasePcbFrame::PcbGeneralLocateAndDisplay( int aHotKeyCode )
 }
 
 
-/*
- * "Join" finds the point where b0+x*(b1-b0) intersects with a0+y*(a1-a0).
+/**
+ * Function Join
+ * finds the point where b0+x*(b1-b0) intersects with a0+y*(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.
  */
-static bool Join( wxPoint& res, wxPoint a0, wxPoint a1, wxPoint b0, wxPoint b1 )
+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
+    */
+
     int64_t denom;
     double  t;
 
@@ -234,16 +240,18 @@ static bool Join( wxPoint& res, wxPoint a0, wxPoint a1, wxPoint b0, wxPoint b1 )
     b1 -= b0;
     b0 -= a0;
 
-    denom = (int64_t) b1.y*a1.x - (int64_t) b1.x*a1.y;
-    if (!denom)
+    denom = (int64_t) b1.y * a1.x - (int64_t) b1.x * a1.y;
+    if( !denom )
+    {
         return false;       // parallel
+    }
 
-    t = ((int64_t) b1.y*b0.x - (int64_t) b1.x*b0.y)/(double) denom;
+    t = ((int64_t) b1.y * b0.x - (int64_t) b1.x * b0.y ) / (double) denom;
 
     t = min( max( t, 0.0 ), 1.0 );
 
-    res.x = (int) round(a0.x+t*a1.x);
-    res.y = (int) round(a0.y+t*a1.y);
+    res->x = (int) round( a0.x + t * a1.x );
+    res->y = (int) round( a0.y + t * a1.y );
 
     return true;
 }
@@ -253,7 +261,7 @@ static bool Join( wxPoint& res, wxPoint a0, wxPoint a1, wxPoint b0, wxPoint b1 )
  * "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 )
+bool Project( wxPoint* res, wxPoint on_grid, const TRACK* track )
 {
     wxPoint vec;
     double  t;
@@ -269,31 +277,40 @@ bool Project( wxPoint& res, wxPoint on_grid, const TRACK* track )
     t /= (int64_t) vec.x*vec.x + (int64_t) vec.y*vec.y;
     t = min( max( t, 0.0 ), 1.0 );
 
-    res.x = (int) round( track->m_Start.x + t*vec.x );
-    res.y = (int) round( track->m_Start.y + t*vec.y );
+    res->x = (int) round( track->m_Start.x + t*vec.x );
+    res->y = (int) round( 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 curpos The initial position, and what to adjust if a change is needed.
+ */
 static bool Magnetize( BOARD* m_Pcb, WinEDA_PcbFrame* frame,
-                       int m_ID_current_state, wxSize grid, wxPoint on_grid, wxPoint& curpos )
+                       int aCurrentTool, wxSize grid, wxPoint on_grid, wxPoint* curpos )
 {
-    const D_PAD* pad;
-    const TRACK* curr = NULL;
-    const TRACK* via, * track;
+    D_PAD*  pad;
+    TRACK*  curr = g_CurrentTrackSegment;
+    TRACK*  via;
+    TRACK*  track;
     int     layer, layer_mask;
 
-    bool         sometimes = g_MagneticPadOption != capture_always && Drc_On;
+    bool    doCheckNet = g_MagneticPadOption != capture_always && Drc_On;
 
-    curr = g_CurrentTrackSegment;
     if( frame->GetCurItem() != curr )
+    {
         curr = NULL;
+    }
 
     switch( g_MagneticPadOption )
     {
     case capture_cursor_in_track_tool:
-        if( m_ID_current_state != ID_TRACK_BUTT )
+        if( aCurrentTool != ID_TRACK_BUTT )
             return false;
         break;
 
@@ -308,20 +325,22 @@ static bool Magnetize( BOARD* m_Pcb, WinEDA_PcbFrame* frame,
     pad = Locate_Any_Pad( m_Pcb, CURSEUR_OFF_GRILLE, TRUE );
     if( pad )
     {
-        if( curr && curr->GetNet() != pad->GetNet() && sometimes )
+        if( doCheckNet && curr && curr->GetNet() != pad->GetNet() )
             return false;
-        curpos = pad->m_Pos;
+
+        *curpos = pad->m_Pos;
         return true;
     }
 
     layer = ( (PCB_SCREEN*) ActiveScreen )->m_Active_Layer;
 
-    via = Locate_Via_Area( m_Pcb, curpos, layer );
+    via = Locate_Via_Area( m_Pcb, *curpos, layer );
     if( via )
     {
-        if( curr && curr->GetNet() != via->GetNet() && sometimes )
+        if( doCheckNet && curr && curr->GetNet() != via->GetNet() )
             return false;
-        curpos = via->m_Start;
+
+        *curpos = via->m_Start;
         return true;
     }
 
@@ -340,27 +359,59 @@ static bool Magnetize( BOARD* m_Pcb, WinEDA_PcbFrame* frame,
      * In two segment mode, ignore the final segment if it's inside a grid
      * square.
      */
-    if( g_TwoSegmentTrackBuild && curr->Pback
+    if( g_TwoSegmentTrackBuild && curr->Back()
         && curr->m_Start.x - grid.x < curr->m_End.x
         && curr->m_Start.x + grid.x > curr->m_End.x
         && curr->m_Start.y - grid.y < curr->m_End.y
         && curr->m_Start.y + grid.y > curr->m_End.y )
+    {
         curr = curr->Back();
+    }
 
-    track = Locate_Pistes( m_Pcb->m_Track, layer_mask, CURSEUR_OFF_GRILLE );
-    for( ; track; track = track->Next() )
+    for( track = m_Pcb->m_Track;  track;  track = track->Next() )
     {
         if( track->Type() != TYPETRACK )
             continue;
 
-        if( curr->GetNet() != track->GetNet() && sometimes )
+        if( doCheckNet && curr->GetNet() != track->GetNet() )
+            continue;
+
+        if( (g_DesignSettings.m_LayerColor[track->GetLayer()] & ITEM_NOT_SHOW) )
             continue;
 
-        if( Join( curpos, track->m_Start, track->m_End,
-               curr->m_Start, curr->m_End ) )
+        if( !track->IsOnLayer( layer ) )
+            continue;
+
+        // @todo, this should be a track overlap test, not a mouse on track test.
+        // The former would consider the new track's width.
+        if( !track->HitTest( *curpos ) )
+            continue;
+
+        if( Join( curpos, track->m_Start, track->m_End, curr->m_Start, curr->m_End ) )
+        {
             return true;
         }
 
+        if( aCurrentTool == ID_TRACK_BUTT )
+        {
+            // 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( distStart < distEnd )
+                *curpos = track->m_Start;
+            else
+                *curpos = track->m_End;
+            return true;
+        }
+    }
+
     return false;
 }
 
@@ -505,22 +556,23 @@ void WinEDA_BasePcbFrame::GeneralControle( wxDC* DC, wxPoint Mouse )
 
         PutOnGrid( &on_grid );
         if( Magnetize(m_Pcb, (WinEDA_PcbFrame *) this, m_ID_current_state,
-                        GetScreen()->GetGrid(), on_grid, curpos) )
+                        GetScreen()->GetGrid(), on_grid, &curpos) )
+        {
             GetScreen()->m_Curseur = curpos;
+        }
         else
         {
-            /*
-             * If there's an intrusion and DRC is active, we pass the cursor
-             * "as is", and let ShowNewTrackWhenMovingCursor figure our what to
-             * do.
-             */
+            // If there's no intrusion and DRC is active, we pass the cursor
+            // "as is", and let ShowNewTrackWhenMovingCursor figure out what to do.
             if(  !Drc_On || !g_CurrentTrackSegment
               || g_CurrentTrackSegment != this->GetCurItem()
-              || !LocateIntrusion(m_Pcb->m_Track, g_CurrentTrackSegment->GetNet(),
+              || !LocateIntrusion( m_Pcb->m_Track, g_CurrentTrackSegment->GetNet(),
                         g_CurrentTrackSegment->m_Width ) )
+            {
                 GetScreen()->m_Curseur = on_grid;
             }
         }
+    }
 
     if( oldpos != GetScreen()->m_Curseur )
     {

pcbnew/editrack.cpp

@@ -501,33 +501,29 @@ void WinEDA_PcbFrame::End_Route( TRACK* track, wxDC* DC )
 TRACK* LocateIntrusion( TRACK* start, int net, int width )
 {
     int     layer = ( (PCB_SCREEN*) ActiveScreen )->m_Active_Layer;
-    int     layer_mask = g_TabOneLayerMask[layer];
-    wxPoint ref = ActiveScreen->RefPos( 1 );
-    TRACK*  track, * found = NULL;
 
-    for( track = start; track; track = track->Next() )
-    {
-        int     dist;
-        wxPoint pos, vec;
-        int64_t tmp;
+    wxPoint ref = ActiveScreen->RefPos( true );
+
+    TRACK*  found = NULL;
 
-        /* Locate_Pistes */
+    for( TRACK* track = start;  track;  track = track->Next() )
+    {
+        if( track->Type() == TYPETRACK )    // skip vias
+        {
             if( track->GetState( BUSY | DELETED ) )
                 continue;
 
-        if( !(g_TabOneLayerMask[track->GetLayer()] & layer_mask) )
+            if( layer != track->GetLayer() )
                 continue;
 
             if( track->GetNet() == net )
                 continue;
 
-        if( track->Type() == TYPEVIA )
-            continue;
-
             /* TRACK::HitTest */
-        dist = width / 2 + track->m_Width / 2 + g_DesignSettings.m_TrackClearence;
-        pos  = ref - track->m_Start;
-        vec  = track->m_End - track->m_Start;
+            int dist = width / 2 + track->m_Width / 2 + g_DesignSettings.m_TrackClearence;
+
+            wxPoint pos  = ref - track->m_Start;
+            wxPoint vec  = track->m_End - track->m_Start;
 
             if( !DistanceTest( dist, vec.x, vec.y, pos.x, pos.y ) )
                 continue;
@@ -535,10 +531,11 @@ TRACK* LocateIntrusion( TRACK* start, int net, int width )
             found = track;
 
             /* prefer intrusions from the side, not the end */
-        tmp = (int64_t) pos.x * vec.x + (int64_t) pos.y * vec.y;
+            int64_t tmp = (int64_t) pos.x * vec.x + (int64_t) pos.y * vec.y;
             if( tmp >= 0 && tmp <= (int64_t) vec.x * vec.x + (int64_t) vec.y * vec.y )
                 break;
         }
+    }
 
     return found;
 }
@@ -612,7 +609,7 @@ static void PushTrack( WinEDA_DrawPanel* panel )
     n.x = (int) round( f * n.x );
     n.y = (int) round( f * n.y );
 
-    Project( track->m_End, cursor, other );
+    Project( &track->m_End, cursor, other );
     track->m_End += n;
 }
 

pcbnew/protos.h

@@ -387,7 +387,7 @@ TRACK*          CreateLockPoint( int* pX, int* pY, TRACK* ptsegm, TRACK* refsegm
 /* CONTROLE.CPP */
 /****************/
 void RemoteCommand( const char* cmdline );
-bool Project( wxPoint& res, wxPoint on_grid, const TRACK* track );
+bool Project( wxPoint* res, wxPoint on_grid, const TRACK* track );
 
 
 /***************/