/** * @file drc_clearance_test_functions.cpp */ /* * This program source code file is part of KiCad, a free EDA CAD application. * * Copyright (C) 2004-2016 Jean-Pierre Charras, jean-pierre.charras@gipsa-lab.inpg.fr * Copyright (C) 2007 Dick Hollenbeck, dick@softplc.com * Copyright (C) 2016 KiCad Developers, see change_log.txt for contributors. * * 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 */ /** * DRC control: these functions make a DRC between pads, tracks and pads versus tracks */ #include #include #include #include #include #include #include #include #include #include #include #include #include /* compare 2 convex polygons and return true if distance > aDist * i.e if for each edge of the first polygon distance from each edge of the other polygon * is >= aDist */ bool poly2polyDRC( wxPoint* aTref, int aTrefCount, wxPoint* aTcompare, int aTcompareCount, int aDist ) { /* Test if one polygon is contained in the other and thus the polygon overlap. * This case is not covered by the following check if one polygone is * completely contained in the other (because edges don't intersect)! */ if( TestPointInsidePolygon( aTref, aTrefCount, aTcompare[0] ) ) return false; if( TestPointInsidePolygon( aTcompare, aTcompareCount, aTref[0] ) ) return false; for( int ii = 0, jj = aTrefCount - 1; ii < aTrefCount; jj = ii, ii++ ) { // for all edges in aTref for( int kk = 0, ll = aTcompareCount - 1; kk < aTcompareCount; ll = kk, kk++ ) { // for all edges in aTcompare double d; int intersect = TestForIntersectionOfStraightLineSegments( aTref[ii].x, aTref[ii].y, aTref[jj].x, aTref[jj].y, aTcompare[kk].x, aTcompare[kk].y, aTcompare[ll].x, aTcompare[ll].y, NULL, NULL, &d ); if( intersect || ( d< aDist ) ) return false; } } return true; } /* compare a trapezoids (can be rectangle) and a segment and return true if distance > aDist */ bool poly2segmentDRC( wxPoint* aTref, int aTrefCount, wxPoint aSegStart, wxPoint aSegEnd, int aDist ) { /* Test if the segment is contained in the polygon. * This case is not covered by the following check if the segment is * completely contained in the polygon (because edges don't intersect)! */ if( TestPointInsidePolygon( aTref, aTrefCount, aSegStart ) ) return false; for( int ii = 0, jj = aTrefCount-1; ii < aTrefCount; jj = ii, ii++ ) { // for all edges in polygon double d; int intersect = TestForIntersectionOfStraightLineSegments( aTref[ii].x, aTref[ii].y, aTref[jj].x, aTref[jj].y, aSegStart.x, aSegStart.y, aSegEnd.x, aSegEnd.y, NULL, NULL, &d ); if( intersect || ( d < aDist) ) return false; } return true; } /* compare a polygon to a point and return true if distance > aDist * do not use this function for horizontal or vertical rectangles * because there is a faster an easier way to compare the distance */ bool convex2pointDRC( wxPoint* aTref, int aTrefCount, wxPoint aPcompare, int aDist ) { /* Test if aPcompare point is contained in the polygon. * This case is not covered by the following check if this point is inside the polygon */ if( TestPointInsidePolygon( aTref, aTrefCount, aPcompare ) ) { return false; } // Test distance between aPcompare and each segment of the polygon: for( int ii = 0, jj = aTrefCount - 1; ii < aTrefCount; jj = ii, ii++ ) // for all edge in polygon { if( TestSegmentHit( aPcompare, aTref[ii], aTref[jj], aDist ) ) return false; } return true; } bool DRC::doTrackDrc( TRACK* aRefSeg, TRACK* aStart, bool testPads ) { TRACK* track; wxPoint delta; // lenght 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( 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; } } else { if( refvia->GetWidth() < dsnSettings.m_ViasMinSize ) { m_currentMarker = fillMarker( refvia, NULL, DRCE_TOO_SMALL_VIA, 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; iiGetPad( 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; // 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 lenght: delta.x = lenght 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 if distance between a segment is > aMinDist * segment start point is assumed in (0,0) and segment start point in m_segmEnd * and its orientation is m_segmAngle (m_segmAngle must be already initialized) * and have aSegmentWidth. */ bool DRC::checkClearanceSegmToPad( const D_PAD* aPad, int aSegmentWidth, int aMinDist ) { wxSize padHalfsize; // half dimension of the pad int r; int segmHalfWidth = aSegmentWidth / 2; int distToLine = segmHalfWidth + aMinDist; padHalfsize.x = aPad->GetSize().x >> 1; padHalfsize.y = aPad->GetSize().y >> 1; if( aPad->GetShape() == PAD_SHAPE_TRAPEZOID ) // The size is bigger, due to GetDelta() extra size { padHalfsize.x += std::abs(aPad->GetDelta().y) / 2; // Remember: GetDelta().y is the GetSize().x change padHalfsize.y += std::abs(aPad->GetDelta().x) / 2; // Remember: GetDelta().x is the GetSize().y change } if( aPad->GetShape() == PAD_SHAPE_CIRCLE ) { /* Easy case: just test the distance between segment and pad centre * calculate pad coordinates in the X,Y axis with X axis = segment to test */ RotatePoint( &m_padToTestPos, m_segmAngle ); return checkMarginToCircle( m_padToTestPos, distToLine + padHalfsize.x, m_segmLength ); } /* calculate the bounding box of the pad, including the clearance and the segment width * if the line from 0 to m_segmEnd does not intersect this bounding box, * the clearance is always OK * But if intersect, a better analysis of the pad shape must be done. */ m_xcliplo = m_padToTestPos.x - distToLine - padHalfsize.x; m_ycliplo = m_padToTestPos.y - distToLine - padHalfsize.y; m_xcliphi = m_padToTestPos.x + distToLine + padHalfsize.x; m_ycliphi = m_padToTestPos.y + distToLine + padHalfsize.y; wxPoint startPoint; wxPoint endPoint = m_segmEnd; double orient = aPad->GetOrientation(); RotatePoint( &startPoint, m_padToTestPos, -orient ); RotatePoint( &endPoint, m_padToTestPos, -orient ); if( checkLine( startPoint, endPoint ) ) return true; /* segment intersects the bounding box. But there is not always a DRC error. * A fine analysis of the pad shape must be done. */ switch( aPad->GetShape() ) { default: return false; case PAD_SHAPE_OVAL: { /* an oval is a complex shape, but is a rectangle and 2 circles * these 3 basic shapes are more easy to test. * * In calculations we are using a vertical oval shape * (i.e. a vertical rounded segment) * for horizontal oval shapes, swap x and y size and rotate the shape */ if( padHalfsize.x > padHalfsize.y ) { std::swap( padHalfsize.x, padHalfsize.y ); orient = AddAngles( orient, 900 ); } // here, padHalfsize.x is the radius of rounded ends. int deltay = padHalfsize.y - padHalfsize.x; // here: padHalfsize.x = radius, // deltay = dist between the centre pad and the centre of a rounded end // Test the rectangular area between the two circles (the rounded ends) m_xcliplo = m_padToTestPos.x - distToLine - padHalfsize.x; m_ycliplo = m_padToTestPos.y - deltay; m_xcliphi = m_padToTestPos.x + distToLine + padHalfsize.x; m_ycliphi = m_padToTestPos.y + deltay; if( !checkLine( startPoint, endPoint ) ) { return false; } // test the first circle startPoint.x = m_padToTestPos.x; // startPoint = centre of the upper circle of the oval shape startPoint.y = m_padToTestPos.y + deltay; // Calculate the actual position of the circle, given the pad orientation: RotatePoint( &startPoint, m_padToTestPos, orient ); // Calculate the actual position of the circle in the new X,Y axis: RotatePoint( &startPoint, m_segmAngle ); if( !checkMarginToCircle( startPoint, padHalfsize.x + distToLine, m_segmLength ) ) { return false; } // test the second circle startPoint.x = m_padToTestPos.x; // startPoint = centre of the lower circle of the oval shape startPoint.y = m_padToTestPos.y - deltay; RotatePoint( &startPoint, m_padToTestPos, orient ); RotatePoint( &startPoint, m_segmAngle ); if( !checkMarginToCircle( startPoint, padHalfsize.x + distToLine, m_segmLength ) ) { return false; } } break; case PAD_SHAPE_ROUNDRECT: // a round rect is a smaller rect, with a clearance augmented by the corners radius r = aPad->GetRoundRectCornerRadius(); padHalfsize.x -= r; padHalfsize.y -= r; distToLine += r; // Fall through case PAD_SHAPE_RECT: // the area to test is a rounded rectangle. // this can be done by testing 2 rectangles and 4 circles (the corners) // Testing the first rectangle dimx + distToLine, dimy: m_xcliplo = m_padToTestPos.x - padHalfsize.x - distToLine; m_ycliplo = m_padToTestPos.y - padHalfsize.y; m_xcliphi = m_padToTestPos.x + padHalfsize.x + distToLine; m_ycliphi = m_padToTestPos.y + padHalfsize.y; if( !checkLine( startPoint, endPoint ) ) return false; // Testing the second rectangle dimx , dimy + distToLine m_xcliplo = m_padToTestPos.x - padHalfsize.x; m_ycliplo = m_padToTestPos.y - padHalfsize.y - distToLine; m_xcliphi = m_padToTestPos.x + padHalfsize.x; m_ycliphi = m_padToTestPos.y + padHalfsize.y + distToLine; if( !checkLine( startPoint, endPoint ) ) return false; // testing the 4 circles which are the clearance area of each corner: // testing the left top corner of the rectangle startPoint.x = m_padToTestPos.x - padHalfsize.x; startPoint.y = m_padToTestPos.y - padHalfsize.y; RotatePoint( &startPoint, m_padToTestPos, orient ); RotatePoint( &startPoint, m_segmAngle ); if( !checkMarginToCircle( startPoint, distToLine, m_segmLength ) ) return false; // testing the right top corner of the rectangle startPoint.x = m_padToTestPos.x + padHalfsize.x; startPoint.y = m_padToTestPos.y - padHalfsize.y; RotatePoint( &startPoint, m_padToTestPos, orient ); RotatePoint( &startPoint, m_segmAngle ); if( !checkMarginToCircle( startPoint, distToLine, m_segmLength ) ) return false; // testing the left bottom corner of the rectangle startPoint.x = m_padToTestPos.x - padHalfsize.x; startPoint.y = m_padToTestPos.y + padHalfsize.y; RotatePoint( &startPoint, m_padToTestPos, orient ); RotatePoint( &startPoint, m_segmAngle ); if( !checkMarginToCircle( startPoint, distToLine, m_segmLength ) ) return false; // testing the right bottom corner of the rectangle startPoint.x = m_padToTestPos.x + padHalfsize.x; startPoint.y = m_padToTestPos.y + padHalfsize.y; RotatePoint( &startPoint, m_padToTestPos, orient ); RotatePoint( &startPoint, m_segmAngle ); if( !checkMarginToCircle( startPoint, distToLine, m_segmLength ) ) return false; break; case PAD_SHAPE_TRAPEZOID: { wxPoint poly[4]; aPad->BuildPadPolygon( poly, wxSize( 0, 0 ), orient ); // Move shape to m_padToTestPos for( int ii = 0; ii < 4; ii++ ) { poly[ii] += m_padToTestPos; RotatePoint( &poly[ii], m_segmAngle ); } if( !poly2segmentDRC( poly, 4, wxPoint( 0, 0 ), wxPoint(m_segmLength,0), distToLine ) ) return false; break; } } return true; } /** * Helper function checkMarginToCircle * Check the distance between a circle (round pad, via or round end of track) * and a segment. the segment is expected starting at 0,0, and on the X axis * return true if distance >= aRadius */ bool DRC::checkMarginToCircle( wxPoint aCentre, int aRadius, int aLength ) { if( abs( aCentre.y ) > aRadius ) // trivial case return true; // Here, distance between aCentre and X axis is < aRadius if( (aCentre.x >= -aRadius ) && ( aCentre.x <= (aLength + aRadius) ) ) { if( (aCentre.x >= 0) && (aCentre.x <= aLength) ) return false; // aCentre is between the starting point and the ending point of the segm if( aCentre.x > aLength ) // aCentre is after the ending point aCentre.x -= aLength; // move aCentre to the starting point of the segment if( EuclideanNorm( aCentre ) < aRadius ) // distance between aCentre and the starting point or the ending point is < aRadius return false; } return true; } // Helper function used in checkLine:: static inline int USCALE( unsigned arg, unsigned num, unsigned den ) { int ii; ii = KiROUND( ( (double) arg * num ) / den ); return ii; } /** Helper function checkLine * Test if a line intersects a bounding box (a rectangle) * The rectangle is defined by m_xcliplo, m_ycliplo and m_xcliphi, m_ycliphi * return true if the line from aSegStart to aSegEnd is outside the bounding box */ bool DRC::checkLine( wxPoint aSegStart, wxPoint aSegEnd ) { #define WHEN_OUTSIDE return true #define WHEN_INSIDE int temp; if( aSegStart.x > aSegEnd.x ) std::swap( aSegStart, aSegEnd ); if( (aSegEnd.x < m_xcliplo) || (aSegStart.x > m_xcliphi) ) { WHEN_OUTSIDE; } if( aSegStart.y < aSegEnd.y ) { if( (aSegEnd.y < m_ycliplo) || (aSegStart.y > m_ycliphi) ) { WHEN_OUTSIDE; } if( aSegStart.y < m_ycliplo ) { temp = USCALE( (aSegEnd.x - aSegStart.x), (m_ycliplo - aSegStart.y), (aSegEnd.y - aSegStart.y) ); if( (aSegStart.x += temp) > m_xcliphi ) { WHEN_OUTSIDE; } aSegStart.y = m_ycliplo; WHEN_INSIDE; } if( aSegEnd.y > m_ycliphi ) { temp = USCALE( (aSegEnd.x - aSegStart.x), (aSegEnd.y - m_ycliphi), (aSegEnd.y - aSegStart.y) ); if( (aSegEnd.x -= temp) < m_xcliplo ) { WHEN_OUTSIDE; } aSegEnd.y = m_ycliphi; WHEN_INSIDE; } if( aSegStart.x < m_xcliplo ) { temp = USCALE( (aSegEnd.y - aSegStart.y), (m_xcliplo - aSegStart.x), (aSegEnd.x - aSegStart.x) ); aSegStart.y += temp; aSegStart.x = m_xcliplo; WHEN_INSIDE; } if( aSegEnd.x > m_xcliphi ) { temp = USCALE( (aSegEnd.y - aSegStart.y), (aSegEnd.x - m_xcliphi), (aSegEnd.x - aSegStart.x) ); aSegEnd.y -= temp; aSegEnd.x = m_xcliphi; WHEN_INSIDE; } } else { if( (aSegStart.y < m_ycliplo) || (aSegEnd.y > m_ycliphi) ) { WHEN_OUTSIDE; } if( aSegStart.y > m_ycliphi ) { temp = USCALE( (aSegEnd.x - aSegStart.x), (aSegStart.y - m_ycliphi), (aSegStart.y - aSegEnd.y) ); if( (aSegStart.x += temp) > m_xcliphi ) { WHEN_OUTSIDE; } aSegStart.y = m_ycliphi; WHEN_INSIDE; } if( aSegEnd.y < m_ycliplo ) { temp = USCALE( (aSegEnd.x - aSegStart.x), (m_ycliplo - aSegEnd.y), (aSegStart.y - aSegEnd.y) ); if( (aSegEnd.x -= temp) < m_xcliplo ) { WHEN_OUTSIDE; } aSegEnd.y = m_ycliplo; WHEN_INSIDE; } if( aSegStart.x < m_xcliplo ) { temp = USCALE( (aSegStart.y - aSegEnd.y), (m_xcliplo - aSegStart.x), (aSegEnd.x - aSegStart.x) ); aSegStart.y -= temp; aSegStart.x = m_xcliplo; WHEN_INSIDE; } if( aSegEnd.x > m_xcliphi ) { temp = USCALE( (aSegStart.y - aSegEnd.y), (aSegEnd.x - m_xcliphi), (aSegEnd.x - aSegStart.x) ); aSegEnd.y += temp; aSegEnd.x = m_xcliphi; WHEN_INSIDE; } } if( ( (aSegEnd.x + aSegStart.x) / 2 <= m_xcliphi ) && ( (aSegEnd.x + aSegStart.x) / 2 >= m_xcliplo ) \ && ( (aSegEnd.y + aSegStart.y) / 2 <= m_ycliphi ) && ( (aSegEnd.y + aSegStart.y) / 2 >= m_ycliplo ) ) { return false; } else { return true; } }