void DRC::testTexts()
{
std::vector<wxPoint> textShape; // a buffer to store the text shape (set of segments)
std::vector<D_PAD*> padList = m_pcb->GetPads();
// Test text areas for vias, tracks and pads inside text areas
for( BOARD_ITEM* item = m_pcb->m_Drawings; item; item = item->Next() )
{
// Drc test only items on copper layers
if( ! IsCopperLayer( item->GetLayer() ) )
continue;
// only texts on copper layers are tested
if( item->Type() != PCB_TEXT_T )
continue;
textShape.clear();
// So far the bounding box makes up the text-area
TEXTE_PCB* text = (TEXTE_PCB*) item;
text->TransformTextShapeToSegmentList( textShape );
if( textShape.size() == 0 ) // Should not happen (empty text?)
continue;
for( TRACK* track = m_pcb->m_Track; track != NULL; track = track->Next() )
{
if( ! track->IsOnLayer( item->GetLayer() ) )
continue;
// Test the distance between each segment and the current track/via
int min_dist = ( track->GetWidth() + text->GetThickness() ) /2 +
track->GetClearance(NULL);
if( track->Type() == PCB_TRACE_T )
{
SEG segref( track->GetStart(), track->GetEnd() );
// Error condition: Distance between text segment and track segment is
// smaller than the clearance of the segment
for( unsigned jj = 0; jj < textShape.size(); jj += 2 )
{
SEG segtest( textShape[jj], textShape[jj+1] );
int dist = segref.Distance( segtest );
if( dist < min_dist )
{
addMarkerToPcb( fillMarker( track, text,
DRCE_TRACK_INSIDE_TEXT,
m_currentMarker ) );
m_currentMarker = nullptr;
break;
}
}
}
else if( track->Type() == PCB_VIA_T )
{
// Error condition: Distance between text segment and via is
// smaller than the clearance of the via
for( unsigned jj = 0; jj < textShape.size(); jj += 2 )
{
SEG segtest( textShape[jj], textShape[jj+1] );
if( segtest.PointCloserThan( track->GetPosition(), min_dist ) )
{
addMarkerToPcb( fillMarker( track, text,
DRCE_VIA_INSIDE_TEXT, m_currentMarker ) );
m_currentMarker = nullptr;
break;
}
}
}
}
// Test pads
for( unsigned ii = 0; ii < padList.size(); ii++ )
{
D_PAD* pad = padList[ii];
if( ! pad->IsOnLayer( item->GetLayer() ) )
continue;
wxPoint shape_pos = pad->ShapePos();
for( unsigned jj = 0; jj < textShape.size(); jj += 2 )
{
/* In order to make some calculations more easier or faster,
* pads and tracks coordinates will be made relative
* to the segment origin
*/
wxPoint origin = textShape[jj]; // origin will be the origin of other coordinates
m_segmEnd = textShape[jj+1] - origin;
wxPoint delta = m_segmEnd;
m_segmAngle = 0;
// for a non horizontal or vertical segment Compute the segment angle
// in tenths of degrees and its length
if( delta.x || delta.y ) // delta.x == delta.y == 0 for vias
{
// Compute the segment angle in 0,1 degrees
m_segmAngle = ArcTangente( delta.y, delta.x );
// Compute the segment length: we build an equivalent rotated segment,
// this segment is horizontal, therefore dx = length
RotatePoint( &delta, m_segmAngle ); // delta.x = length, delta.y = 0
}
m_segmLength = delta.x;
m_padToTestPos = shape_pos - origin;
if( !checkClearanceSegmToPad( pad, text->GetThickness(),
pad->GetClearance(NULL) ) )
{
addMarkerToPcb( fillMarker( pad, text,
DRCE_PAD_INSIDE_TEXT, m_currentMarker ) );
m_currentMarker = nullptr;
break;
}
}
}
}
}
bool DRC::doTrackDrc( TRACK* aRefSeg, TRACK* aStart, bool testPads )
{
TRACK* track;
wxPoint delta; // length on X and Y axis of segments
LSET layerMask;
int net_code_ref;
wxPoint shape_pos;
NETCLASSPTR netclass = aRefSeg->GetNetClass();
BOARD_DESIGN_SETTINGS& dsnSettings = m_pcb->GetDesignSettings();
/* In order to make some calculations more easier or faster,
* pads and tracks coordinates will be made relative to the reference segment origin
*/
wxPoint origin = aRefSeg->GetStart(); // origin will be the origin of other coordinates
m_segmEnd = delta = aRefSeg->GetEnd() - origin;
m_segmAngle = 0;
layerMask = aRefSeg->GetLayerSet();
net_code_ref = aRefSeg->GetNetCode();
// Phase 0 : Test vias
if( aRefSeg->Type() == PCB_VIA_T )
{
const VIA *refvia = static_cast<const VIA*>( aRefSeg );
// test if the via size is smaller than minimum
if( refvia->GetViaType() == VIA_MICROVIA )
{
if( refvia->GetWidth() < dsnSettings.m_MicroViasMinSize )
{
m_currentMarker = fillMarker( refvia, NULL,
DRCE_TOO_SMALL_MICROVIA, m_currentMarker );
return false;
}
if( refvia->GetDrillValue() < dsnSettings.m_MicroViasMinDrill )
{
m_currentMarker = fillMarker( refvia, NULL,
DRCE_TOO_SMALL_MICROVIA_DRILL, m_currentMarker );
return false;
}
}
else
{
if( refvia->GetWidth() < dsnSettings.m_ViasMinSize )
{
m_currentMarker = fillMarker( refvia, NULL,
DRCE_TOO_SMALL_VIA, m_currentMarker );
return false;
}
if( refvia->GetDrillValue() < dsnSettings.m_ViasMinDrill )
{
m_currentMarker = fillMarker( refvia, NULL,
DRCE_TOO_SMALL_VIA_DRILL, m_currentMarker );
return false;
}
}
// test if via's hole is bigger than its diameter
// This test is necessary since the via hole size and width can be modified
// and a default via hole can be bigger than some vias sizes
if( refvia->GetDrillValue() > refvia->GetWidth() )
{
m_currentMarker = fillMarker( refvia, NULL,
DRCE_VIA_HOLE_BIGGER, m_currentMarker );
return false;
}
// For microvias: test if they are blind vias and only between 2 layers
// because they are used for very small drill size and are drill by laser
// and **only one layer** can be drilled
if( refvia->GetViaType() == VIA_MICROVIA )
{
LAYER_ID layer1, layer2;
bool err = true;
refvia->LayerPair( &layer1, &layer2 );
if( layer1 > layer2 )
std::swap( layer1, layer2 );
if( layer2 == B_Cu && layer1 == m_pcb->GetDesignSettings().GetCopperLayerCount() - 2 )
err = false;
else if( layer1 == F_Cu && layer2 == In1_Cu )
err = false;
if( err )
{
m_currentMarker = fillMarker( refvia, NULL,
DRCE_MICRO_VIA_INCORRECT_LAYER_PAIR, m_currentMarker );
return false;
}
}
}
else // This is a track segment
{
if( aRefSeg->GetWidth() < dsnSettings.m_TrackMinWidth )
{
m_currentMarker = fillMarker( aRefSeg, NULL,
DRCE_TOO_SMALL_TRACK_WIDTH, m_currentMarker );
return false;
}
}
// for a non horizontal or vertical segment Compute the segment angle
// in tenths of degrees and its length
if( delta.x || delta.y )
{
// Compute the segment angle in 0,1 degrees
m_segmAngle = ArcTangente( delta.y, delta.x );
// Compute the segment length: we build an equivalent rotated segment,
// this segment is horizontal, therefore dx = length
RotatePoint( &delta, m_segmAngle ); // delta.x = length, delta.y = 0
}
m_segmLength = delta.x;
/******************************************/
/* Phase 1 : test DRC track to pads : */
/******************************************/
/* Use a dummy pad to test DRC tracks versus holes, for pads not on all copper layers
* but having a hole
* This dummy pad has the size and shape of the hole
* to test tracks to pad hole DRC, using checkClearanceSegmToPad test function.
* Therefore, this dummy pad is a circle or an oval.
* A pad must have a parent because some functions expect a non null parent
* to find the parent board, and some other data
*/
MODULE dummymodule( m_pcb ); // Creates a dummy parent
D_PAD dummypad( &dummymodule );
dummypad.SetLayerSet( LSET::AllCuMask() ); // Ensure the hole is on all layers
// Compute the min distance to pads
if( testPads )
{
unsigned pad_count = m_pcb->GetPadCount();
for( unsigned ii = 0; ii<pad_count; ++ii )
{
D_PAD* pad = m_pcb->GetPad( ii );
/* No problem if pads are on an other layer,
* But if a drill hole exists (a pad on a single layer can have a hole!)
* we must test the hole
*/
if( !( pad->GetLayerSet() & layerMask ).any() )
{
/* We must test the pad hole. In order to use the function
* checkClearanceSegmToPad(),a pseudo pad is used, with a shape and a
* size like the hole
*/
if( pad->GetDrillSize().x == 0 )
continue;
dummypad.SetSize( pad->GetDrillSize() );
dummypad.SetPosition( pad->GetPosition() );
dummypad.SetShape( pad->GetDrillShape() == PAD_DRILL_SHAPE_OBLONG ?
PAD_SHAPE_OVAL : PAD_SHAPE_CIRCLE );
dummypad.SetOrientation( pad->GetOrientation() );
m_padToTestPos = dummypad.GetPosition() - origin;
if( !checkClearanceSegmToPad( &dummypad, aRefSeg->GetWidth(),
netclass->GetClearance() ) )
{
m_currentMarker = fillMarker( aRefSeg, pad,
DRCE_TRACK_NEAR_THROUGH_HOLE, m_currentMarker );
return false;
}
continue;
}
// The pad must be in a net (i.e pt_pad->GetNet() != 0 )
// but no problem if the pad netcode is the current netcode (same net)
if( pad->GetNetCode() // the pad must be connected
&& net_code_ref == pad->GetNetCode() ) // the pad net is the same as current net -> Ok
continue;
// DRC for the pad
shape_pos = pad->ShapePos();
m_padToTestPos = shape_pos - origin;
if( !checkClearanceSegmToPad( pad, aRefSeg->GetWidth(), aRefSeg->GetClearance( pad ) ) )
{
m_currentMarker = fillMarker( aRefSeg, pad,
DRCE_TRACK_NEAR_PAD, m_currentMarker );
return false;
}
}
}
/***********************************************/
/* Phase 2: test DRC with other track segments */
/***********************************************/
// At this point the reference segment is the X axis
// Test the reference segment with other track segments
wxPoint segStartPoint;
wxPoint segEndPoint;
for( track = aStart; track; track = track->Next() )
{
// No problem if segments have the same net code:
if( net_code_ref == track->GetNetCode() )
continue;
// No problem if segment are on different layers :
if( !( layerMask & track->GetLayerSet() ).any() )
continue;
// the minimum distance = clearance plus half the reference track
// width plus half the other track's width
int w_dist = aRefSeg->GetClearance( track );
w_dist += (aRefSeg->GetWidth() + track->GetWidth()) / 2;
// Due to many double to int conversions during calculations, which
// create rounding issues,
// the exact clearance margin cannot be really known.
// To avoid false bad DRC detection due to these rounding issues,
// slightly decrease the w_dist (remove one nanometer is enough !)
w_dist -= 1;
// If the reference segment is a via, we test it here
if( aRefSeg->Type() == PCB_VIA_T )
{
delta = track->GetEnd() - track->GetStart();
segStartPoint = aRefSeg->GetStart() - track->GetStart();
if( track->Type() == PCB_VIA_T )
{
// Test distance between two vias, i.e. two circles, trivial case
if( EuclideanNorm( segStartPoint ) < w_dist )
{
m_currentMarker = fillMarker( aRefSeg, track,
DRCE_VIA_NEAR_VIA, m_currentMarker );
return false;
}
}
else // test via to segment
{
// Compute l'angle du segment a tester;
double angle = ArcTangente( delta.y, delta.x );
// Compute new coordinates ( the segment become horizontal)
RotatePoint( &delta, angle );
RotatePoint( &segStartPoint, angle );
if( !checkMarginToCircle( segStartPoint, w_dist, delta.x ) )
{
m_currentMarker = fillMarker( track, aRefSeg,
DRCE_VIA_NEAR_TRACK, m_currentMarker );
return false;
}
}
continue;
}
/* We compute segStartPoint, segEndPoint = starting and ending point coordinates for
* the segment to test in the new axis : the new X axis is the
* reference segment. We must translate and rotate the segment to test
*/
segStartPoint = track->GetStart() - origin;
segEndPoint = track->GetEnd() - origin;
RotatePoint( &segStartPoint, m_segmAngle );
RotatePoint( &segEndPoint, m_segmAngle );
if( track->Type() == PCB_VIA_T )
{
if( checkMarginToCircle( segStartPoint, w_dist, m_segmLength ) )
continue;
m_currentMarker = fillMarker( aRefSeg, track,
DRCE_TRACK_NEAR_VIA, m_currentMarker );
return false;
}
/* We have changed axis:
* the reference segment is Horizontal.
* 3 cases : the segment to test can be parallel, perpendicular or have an other direction
*/
if( segStartPoint.y == segEndPoint.y ) // parallel segments
{
if( abs( segStartPoint.y ) >= w_dist )
continue;
// Ensure segStartPoint.x <= segEndPoint.x
if( segStartPoint.x > segEndPoint.x )
std::swap( segStartPoint.x, segEndPoint.x );
if( segStartPoint.x > (-w_dist) && segStartPoint.x < (m_segmLength + w_dist) ) /* possible error drc */
{
// the start point is inside the reference range
// X........
// O--REF--+
// Fine test : we consider the rounded shape of each end of the track segment:
if( segStartPoint.x >= 0 && segStartPoint.x <= m_segmLength )
{
m_currentMarker = fillMarker( aRefSeg, track,
DRCE_TRACK_ENDS1, m_currentMarker );
return false;
}
if( !checkMarginToCircle( segStartPoint, w_dist, m_segmLength ) )
{
m_currentMarker = fillMarker( aRefSeg, track,
DRCE_TRACK_ENDS2, m_currentMarker );
return false;
}
}
if( segEndPoint.x > (-w_dist) && segEndPoint.x < (m_segmLength + w_dist) )
{
// the end point is inside the reference range
// .....X
// O--REF--+
// Fine test : we consider the rounded shape of the ends
if( segEndPoint.x >= 0 && segEndPoint.x <= m_segmLength )
{
m_currentMarker = fillMarker( aRefSeg, track,
DRCE_TRACK_ENDS3, m_currentMarker );
return false;
}
if( !checkMarginToCircle( segEndPoint, w_dist, m_segmLength ) )
{
m_currentMarker = fillMarker( aRefSeg, track,
DRCE_TRACK_ENDS4, m_currentMarker );
return false;
}
}
if( segStartPoint.x <=0 && segEndPoint.x >= 0 )
{
// the segment straddles the reference range (this actually only
// checks if it straddles the origin, because the other cases where already
// handled)
// X.............X
// O--REF--+
m_currentMarker = fillMarker( aRefSeg, track,
DRCE_TRACK_SEGMENTS_TOO_CLOSE, m_currentMarker );
return false;
}
}
else if( segStartPoint.x == segEndPoint.x ) // perpendicular segments
{
if( ( segStartPoint.x <= (-w_dist) ) || ( segStartPoint.x >= (m_segmLength + w_dist) ) )
continue;
// Test if segments are crossing
if( segStartPoint.y > segEndPoint.y )
std::swap( segStartPoint.y, segEndPoint.y );
if( (segStartPoint.y < 0) && (segEndPoint.y > 0) )
{
m_currentMarker = fillMarker( aRefSeg, track,
DRCE_TRACKS_CROSSING, m_currentMarker );
return false;
}
// At this point the drc error is due to an end near a reference segm end
if( !checkMarginToCircle( segStartPoint, w_dist, m_segmLength ) )
{
m_currentMarker = fillMarker( aRefSeg, track,
DRCE_ENDS_PROBLEM1, m_currentMarker );
return false;
}
if( !checkMarginToCircle( segEndPoint, w_dist, m_segmLength ) )
{
m_currentMarker = fillMarker( aRefSeg, track,
DRCE_ENDS_PROBLEM2, m_currentMarker );
return false;
}
}
else // segments quelconques entre eux
{
// calcul de la "surface de securite du segment de reference
// First rought 'and fast) test : the track segment is like a rectangle
m_xcliplo = m_ycliplo = -w_dist;
m_xcliphi = m_segmLength + w_dist;
m_ycliphi = w_dist;
// A fine test is needed because a serment is not exactly a
// rectangle, it has rounded ends
if( !checkLine( segStartPoint, segEndPoint ) )
{
/* 2eme passe : the track has rounded ends.
* we must a fine test for each rounded end and the
* rectangular zone
*/
m_xcliplo = 0;
m_xcliphi = m_segmLength;
if( !checkLine( segStartPoint, segEndPoint ) )
{
m_currentMarker = fillMarker( aRefSeg, track,
DRCE_ENDS_PROBLEM3, m_currentMarker );
return false;
}
else // The drc error is due to the starting or the ending point of the reference segment
{
// Test the starting and the ending point
segStartPoint = track->GetStart();
segEndPoint = track->GetEnd();
delta = segEndPoint - segStartPoint;
// Compute the segment orientation (angle) en 0,1 degre
double angle = ArcTangente( delta.y, delta.x );
// Compute the segment length: delta.x = length after rotation
RotatePoint( &delta, angle );
/* Comute the reference segment coordinates relatives to a
* X axis = current tested segment
*/
wxPoint relStartPos = aRefSeg->GetStart() - segStartPoint;
wxPoint relEndPos = aRefSeg->GetEnd() - segStartPoint;
RotatePoint( &relStartPos, angle );
RotatePoint( &relEndPos, angle );
if( !checkMarginToCircle( relStartPos, w_dist, delta.x ) )
{
m_currentMarker = fillMarker( aRefSeg, track,
DRCE_ENDS_PROBLEM4, m_currentMarker );
return false;
}
if( !checkMarginToCircle( relEndPos, w_dist, delta.x ) )
{
m_currentMarker = fillMarker( aRefSeg, track,
DRCE_ENDS_PROBLEM5, m_currentMarker );
return false;
}
}
}
}
}
return true;
}
/* test DRC between 2 pads.
* this function can be also used to test DRC between a pad and a hole,
* because a hole is like a round or oval pad.
*/
bool DRC::checkClearancePadToPad( D_PAD* aRefPad, D_PAD* aPad )
{
int dist;
double pad_angle;
// Get the clearance between the 2 pads. this is the min distance between aRefPad and aPad
int dist_min = aRefPad->GetClearance( aPad );
// relativePadPos is the aPad shape position relative to the aRefPad shape position
wxPoint relativePadPos = aPad->ShapePos() - aRefPad->ShapePos();
dist = KiROUND( EuclideanNorm( relativePadPos ) );
// Quick test: Clearance is OK if the bounding circles are further away than "dist_min"
if( (dist - aRefPad->GetBoundingRadius() - aPad->GetBoundingRadius()) >= dist_min )
return true;
/* Here, pads are near and DRC depend on the pad shapes
* We must compare distance using a fine shape analysis
* Because a circle or oval shape is the easier shape to test, try to have
* aRefPad shape type = PAD_SHAPE_CIRCLE or PAD_SHAPE_OVAL.
* if aRefPad = TRAP. and aPad = RECT, also swap pads
* Swap aRefPad and aPad if needed
*/
bool swap_pads;
swap_pads = false;
// swap pads to make comparisons easier
// Note also a ROUNDRECT pad with a corner radius = r can be considered as
// a smaller RECT (size - 2*r) with a clearance increased by r
// priority is aRefPad = ROUND then OVAL then RECT/ROUNDRECT then other
if( aRefPad->GetShape() != aPad->GetShape() && aRefPad->GetShape() != PAD_SHAPE_CIRCLE )
{
// pad ref shape is here oval, rect, roundrect, trapezoid or custom
switch( aPad->GetShape() )
{
case PAD_SHAPE_CIRCLE:
swap_pads = true;
break;
case PAD_SHAPE_OVAL:
swap_pads = true;
break;
case PAD_SHAPE_RECT:
case PAD_SHAPE_ROUNDRECT:
if( aRefPad->GetShape() != PAD_SHAPE_OVAL )
swap_pads = true;
break;
default:
break;
}
}
if( swap_pads )
{
std::swap( aRefPad, aPad );
relativePadPos = -relativePadPos;
}
// corners of aRefPad (used only for rect/roundrect/trap pad)
wxPoint polyref[4];
// corners of aRefPad (used only for custom pad)
SHAPE_POLY_SET polysetref;
// corners of aPad (used only for rect/roundrect/trap pad)
wxPoint polycompare[4];
// corners of aPad (used only custom pad)
SHAPE_POLY_SET polysetcompare;
/* Because pad exchange, aRefPad shape is PAD_SHAPE_CIRCLE or PAD_SHAPE_OVAL,
* if one of the 2 pads was a PAD_SHAPE_CIRCLE or PAD_SHAPE_OVAL.
* Therefore, if aRefPad is a PAD_SHAPE_RECT, PAD_SHAPE_ROUNDRECT or a PAD_SHAPE_TRAPEZOID,
* aPad is also a PAD_SHAPE_RECT, PAD_SHAPE_ROUNDRECT or a PAD_SHAPE_TRAPEZOID
*/
bool diag = true;
switch( aRefPad->GetShape() )
{
case PAD_SHAPE_CIRCLE:
/* One can use checkClearanceSegmToPad to test clearance
* aRefPad is like a track segment with a null length and a witdth = GetSize().x
*/
m_segmLength = 0;
m_segmAngle = 0;
m_segmEnd.x = m_segmEnd.y = 0;
m_padToTestPos = relativePadPos;
diag = checkClearanceSegmToPad( aPad, aRefPad->GetSize().x, dist_min );
break;
case PAD_SHAPE_TRAPEZOID:
case PAD_SHAPE_ROUNDRECT:
case PAD_SHAPE_RECT:
// pad_angle = pad orient relative to the aRefPad orient
pad_angle = aRefPad->GetOrientation() + aPad->GetOrientation();
NORMALIZE_ANGLE_POS( pad_angle );
if( aRefPad->GetShape() == PAD_SHAPE_ROUNDRECT )
{
int padRadius = aRefPad->GetRoundRectCornerRadius();
dist_min += padRadius;
GetRoundRectCornerCenters( polyref, padRadius, wxPoint( 0, 0 ),
aRefPad->GetSize(), aRefPad->GetOrientation() );
}
else
aRefPad->BuildPadPolygon( polyref, wxSize( 0, 0 ), aRefPad->GetOrientation() );
switch( aPad->GetShape() )
{
case PAD_SHAPE_ROUNDRECT:
case PAD_SHAPE_RECT:
case PAD_SHAPE_TRAPEZOID:
if( aPad->GetShape() == PAD_SHAPE_ROUNDRECT )
{
int padRadius = aPad->GetRoundRectCornerRadius();
dist_min += padRadius;
GetRoundRectCornerCenters( polycompare, padRadius, relativePadPos,
aPad->GetSize(), aPad->GetOrientation() );
}
else
{
aPad->BuildPadPolygon( polycompare, wxSize( 0, 0 ), aPad->GetOrientation() );
// Move aPad shape to relativePadPos
for( int ii = 0; ii < 4; ii++ )
polycompare[ii] += relativePadPos;
}
// And now test polygons:
if( polysetref.OutlineCount() )
{
const SHAPE_LINE_CHAIN& refpoly = polysetref.COutline( 0 );
// And now test polygons:
if( !poly2polyDRC( (wxPoint*) &refpoly.CPoint( 0 ), refpoly.PointCount(),
polycompare, 4, dist_min ) )
diag = false;
}
else if( !poly2polyDRC( polyref, 4, polycompare, 4, dist_min ) )
diag = false;
break;
default:
wxLogDebug( wxT( "DRC::checkClearancePadToPad: unexpected pad shape %d" ), aPad->GetShape() );
break;
}
break;
case PAD_SHAPE_OVAL: /* an oval pad is like a track segment */
{
/* Create a track segment with same dimensions as the oval aRefPad
* and use checkClearanceSegmToPad function to test aPad to aRefPad clearance
*/
int segm_width;
m_segmAngle = aRefPad->GetOrientation(); // Segment orient.
if( aRefPad->GetSize().y < aRefPad->GetSize().x ) // Build an horizontal equiv segment
{
segm_width = aRefPad->GetSize().y;
m_segmLength = aRefPad->GetSize().x - aRefPad->GetSize().y;
}
else // Vertical oval: build an horizontal equiv segment and rotate 90.0 deg
{
segm_width = aRefPad->GetSize().x;
m_segmLength = aRefPad->GetSize().y - aRefPad->GetSize().x;
m_segmAngle += 900;
}
/* the start point must be 0,0 and currently relativePadPos
* is relative the center of pad coordinate */
wxPoint segstart;
segstart.x = -m_segmLength / 2; // Start point coordinate of the horizontal equivalent segment
RotatePoint( &segstart, m_segmAngle ); // actual start point coordinate of the equivalent segment
// Calculate segment end position relative to the segment origin
m_segmEnd.x = -2 * segstart.x;
m_segmEnd.y = -2 * segstart.y;
// Recalculate the equivalent segment angle in 0,1 degrees
// to prepare a call to checkClearanceSegmToPad()
m_segmAngle = ArcTangente( m_segmEnd.y, m_segmEnd.x );
// move pad position relative to the segment origin
m_padToTestPos = relativePadPos - segstart;
// Use segment to pad check to test the second pad:
diag = checkClearanceSegmToPad( aPad, segm_width, dist_min );
break;
}
default:
wxLogDebug( wxT( "DRC::checkClearancePadToPad: unknown pad shape" ) );
break;
}
return diag;
}
/* test DRC between 2 pads.
* this function can be also used to test DRC between a pas and a hole,
* because a hole is like a round pad.
*/
bool DRC::checkClearancePadToPad( D_PAD* aRefPad, D_PAD* aPad )
{
int dist;
double pad_angle;
// Get the clerance between the 2 pads. this is the min distance between aRefPad and aPad
int dist_min = aRefPad->GetClearance( aPad );
// relativePadPos is the aPad shape position relative to the aRefPad shape position
wxPoint relativePadPos = aPad->ShapePos() - aRefPad->ShapePos();
dist = KiROUND( EuclideanNorm( relativePadPos ) );
// Quick test: Clearance is OK if the bounding circles are further away than "dist_min"
if( (dist - aRefPad->GetBoundingRadius() - aPad->GetBoundingRadius()) >= dist_min )
return true;
/* Here, pads are near and DRC depend on the pad shapes
* We must compare distance using a fine shape analysis
* Because a circle or oval shape is the easier shape to test, try to have
* aRefPad shape type = PAD_CIRCLE or PAD_OVAL.
* if aRefPad = TRAP. and aPad = RECT, also swap pads
* Swap aRefPad and aPad if needed
*/
bool swap_pads;
swap_pads = false;
// swap pads to make comparisons easier
// priority is aRefPad = ROUND then OVAL then RECT then other
if( aRefPad->GetShape() != aPad->GetShape() && aRefPad->GetShape() != PAD_CIRCLE )
{
// pad ref shape is here oval, rect or trapezoid
switch( aPad->GetShape() )
{
case PAD_CIRCLE:
swap_pads = true;
break;
case PAD_OVAL:
swap_pads = true;
break;
case PAD_RECT:
if( aRefPad->GetShape() != PAD_OVAL )
swap_pads = true;
break;
default:
break;
}
}
if( swap_pads )
{
EXCHG( aRefPad, aPad );
relativePadPos = -relativePadPos;
}
/* Because pad exchange, aRefPad shape is PAD_CIRCLE or PAD_OVAL,
* if one of the 2 pads was a PAD_CIRCLE or PAD_OVAL.
* Therefore, if aRefPad is a PAD_RECT or a PAD_TRAPEZOID,
* aPad is also a PAD_RECT or a PAD_TRAPEZOID
*/
bool diag = true;
switch( aRefPad->GetShape() )
{
case PAD_CIRCLE:
/* One can use checkClearanceSegmToPad to test clearance
* aRefPad is like a track segment with a null length and a witdth = GetSize().x
*/
m_segmLength = 0;
m_segmAngle = 0;
m_segmEnd.x = m_segmEnd.y = 0;
m_padToTestPos = relativePadPos;
diag = checkClearanceSegmToPad( aPad, aRefPad->GetSize().x, dist_min );
break;
case PAD_RECT:
// pad_angle = pad orient relative to the aRefPad orient
pad_angle = aRefPad->GetOrientation() + aPad->GetOrientation();
NORMALIZE_ANGLE_POS( pad_angle );
if( aPad->GetShape() == PAD_RECT )
{
wxSize size = aPad->GetSize();
// The trivial case is if both rects are rotated by multiple of 90 deg
// Most of time this is the case, and the test is fast
if( ( (aRefPad->GetOrientation() == 0) || (aRefPad->GetOrientation() == 900)
|| (aRefPad->GetOrientation() == 1800) || (aRefPad->GetOrientation() == 2700) )
&& ( (aPad->GetOrientation() == 0) || (aPad->GetOrientation() == 900) || (aPad->GetOrientation() == 1800)
|| (aPad->GetOrientation() == 2700) ) )
{
if( (pad_angle == 900) || (pad_angle == 2700) )
{
EXCHG( size.x, size.y );
}
// Test DRC:
diag = false;
RotatePoint( &relativePadPos, aRefPad->GetOrientation() );
relativePadPos.x = std::abs( relativePadPos.x );
relativePadPos.y = std::abs( relativePadPos.y );
if( ( relativePadPos.x - ( (size.x + aRefPad->GetSize().x) / 2 ) ) >= dist_min )
diag = true;
if( ( relativePadPos.y - ( (size.y + aRefPad->GetSize().y) / 2 ) ) >= dist_min )
diag = true;
}
else // at least one pad has any other orient. Test is more tricky
{ // Use the trapezoid2trapezoidDRC which also compare 2 rectangles with any orientation
wxPoint polyref[4]; // Shape of aRefPad
wxPoint polycompare[4]; // Shape of aPad
aRefPad->BuildPadPolygon( polyref, wxSize( 0, 0 ), aRefPad->GetOrientation() );
aPad->BuildPadPolygon( polycompare, wxSize( 0, 0 ), aPad->GetOrientation() );
// Move aPad shape to relativePadPos
for( int ii = 0; ii < 4; ii++ )
polycompare[ii] += relativePadPos;
// And now test polygons:
if( !trapezoid2trapezoidDRC( polyref, polycompare, dist_min ) )
diag = false;
}
}
else if( aPad->GetShape() == PAD_TRAPEZOID )
{
wxPoint polyref[4]; // Shape of aRefPad
wxPoint polycompare[4]; // Shape of aPad
aRefPad->BuildPadPolygon( polyref, wxSize( 0, 0 ), aRefPad->GetOrientation() );
aPad->BuildPadPolygon( polycompare, wxSize( 0, 0 ), aPad->GetOrientation() );
// Move aPad shape to relativePadPos
for( int ii = 0; ii < 4; ii++ )
polycompare[ii] += relativePadPos;
// And now test polygons:
if( !trapezoid2trapezoidDRC( polyref, polycompare, dist_min ) )
diag = false;
}
else
{
// Should not occur, because aPad and aRefPad are swapped
// to have only aPad shape RECT or TRAP and aRefPad shape TRAP or RECT.
wxLogDebug( wxT( "DRC::checkClearancePadToPad: unexpected pad ref RECT @ %d, %d to pad shape %d @ %d, %d"),
aRefPad->GetPosition().x, aRefPad->GetPosition().y,
aPad->GetShape(), aPad->GetPosition().x, aPad->GetPosition().y );
}
break;
case PAD_OVAL: /* an oval pad is like a track segment */
{
/* Create a track segment with same dimensions as the oval aRefPad
* and use checkClearanceSegmToPad function to test aPad to aRefPad clearance
*/
int segm_width;
m_segmAngle = aRefPad->GetOrientation(); // Segment orient.
if( aRefPad->GetSize().y < aRefPad->GetSize().x ) // Build an horizontal equiv segment
{
segm_width = aRefPad->GetSize().y;
m_segmLength = aRefPad->GetSize().x - aRefPad->GetSize().y;
}
else // Vertical oval: build an horizontal equiv segment and rotate 90.0 deg
{
segm_width = aRefPad->GetSize().x;
m_segmLength = aRefPad->GetSize().y - aRefPad->GetSize().x;
m_segmAngle += 900;
}
/* the start point must be 0,0 and currently relativePadPos
* is relative the center of pad coordinate */
wxPoint segstart;
segstart.x = -m_segmLength / 2; // Start point coordinate of the horizontal equivalent segment
RotatePoint( &segstart, m_segmAngle ); // actual start point coordinate of the equivalent segment
// Calculate segment end position relative to the segment origin
m_segmEnd.x = -2 * segstart.x;
m_segmEnd.y = -2 * segstart.y;
// Recalculate the equivalent segment angle in 0,1 degrees
// to prepare a call to checkClearanceSegmToPad()
m_segmAngle = ArcTangente( m_segmEnd.y, m_segmEnd.x );
// move pad position relative to the segment origin
m_padToTestPos = relativePadPos - segstart;
// Use segment to pad check to test the second pad:
diag = checkClearanceSegmToPad( aPad, segm_width, dist_min );
break;
}
case PAD_TRAPEZOID:
// at this point, aPad is also a trapezoid, because all other shapes
// have priority, and are already tested
wxASSERT( aPad->GetShape() == PAD_TRAPEZOID );
{
wxPoint polyref[4]; // Shape of aRefPad
wxPoint polycompare[4]; // Shape of aPad
aRefPad->BuildPadPolygon( polyref, wxSize( 0, 0 ), aRefPad->GetOrientation() );
aPad->BuildPadPolygon( polycompare, wxSize( 0, 0 ), aPad->GetOrientation() );
// Move aPad shape to relativePadPos
for( int ii = 0; ii < 4; ii++ )
polycompare[ii] += relativePadPos;
// And now test polygons:
if( !trapezoid2trapezoidDRC( polyref, polycompare, dist_min ) )
diag = false;
}
break;
default:
wxLogDebug( wxT( "DRC::checkClearancePadToPad: unexpected pad shape" ) );
break;
}
return diag;
}