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Small fix for crippled polylines containing 0 points.

This commit is contained in:
Maciej Suminski 2014-02-11 15:01:49 +01:00
parent c09e8ade2a
commit e43b5f7c0f
1 changed files with 4 additions and 1 deletions
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5
common/gal/opengl/opengl_gal.cpp
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@ -466,10 +466,13 @@ void OPENGL_GAL::DrawRectangle( const VECTOR2D& aStartPoint, const VECTOR2D& aEn
void OPENGL_GAL::DrawPolyline( std::deque<VECTOR2D>& aPointList ) void OPENGL_GAL::DrawPolyline( std::deque<VECTOR2D>& aPointList )
{ {
if( aPointList.empty() )
return;
std::deque<VECTOR2D>::const_iterator it = aPointList.begin(); std::deque<VECTOR2D>::const_iterator it = aPointList.begin();
// Start from the second point // Start from the second point
for( it++; it != aPointList.end(); it++ ) for( ++it; it != aPointList.end(); ++it )
{ {
const VECTOR2D startEndVector = ( *it - *( it - 1 ) ); const VECTOR2D startEndVector = ( *it - *( it - 1 ) );
double lineAngle = startEndVector.Angle(); double lineAngle = startEndVector.Angle();