53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
/*********************/
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/* dangling_ends.cpp */
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/*********************/
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#include "fctsys.h"
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#include "gr_basic.h"
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#include "sch_item_struct.h"
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#include "wxEeschemaStruct.h"
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#include "class_sch_screen.h"
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#include "general.h"
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#include "protos.h"
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#include "class_libentry.h"
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#include "lib_pin.h"
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#include "sch_component.h"
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/* Returns true if the point P is on the segment S. */
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bool SegmentIntersect( wxPoint aSegStart, wxPoint aSegEnd, wxPoint aTestPoint )
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{
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wxPoint vectSeg = aSegEnd - aSegStart; // Vector from S1 to S2
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wxPoint vectPoint = aTestPoint - aSegStart; // Vector from S1 to P
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// Use long long here to avoid overflow in calculations
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if( (long long) vectSeg.x * vectPoint.y - (long long) vectSeg.y * vectPoint.x )
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return false; /* Cross product non-zero, vectors not parallel */
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if( ( (long long) vectSeg.x * vectPoint.x + (long long) vectSeg.y * vectPoint.y ) <
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( (long long) vectPoint.x * vectPoint.x + (long long) vectPoint.y * vectPoint.y ) )
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return false; /* Point not on segment */
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return true;
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}
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void SCH_EDIT_FRAME::TestDanglingEnds( SCH_ITEM* aDrawList, wxDC* aDC )
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{
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SCH_ITEM* item;
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std::vector< DANGLING_END_ITEM > endPoints;
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for( item = aDrawList; item != NULL; item = item->Next() )
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item->GetEndPoints( endPoints );
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for( item = aDrawList; item; item = item->Next() )
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{
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if( item->IsDanglingStateChanged( endPoints ) && aDC != NULL )
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{
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item->Draw( DrawPanel, aDC, wxPoint( 0, 0 ), g_XorMode );
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item->Draw( DrawPanel, aDC, wxPoint( 0, 0 ), GR_DEFAULT_DRAWMODE );
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}
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}
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}
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