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fix #3434

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git-svn-id: http://svn.osgeo.org/qgis/trunk@15076 c8812cc2-4d05-0410-92ff-de0c093fc19c
This commit is contained in:
jef 2011-01-25 08:23:52 +00:00
parent 43aff11843
commit 895c4a4071
1 changed files with 1 additions and 14 deletions
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15
src/core/symbology-ng/qgslinesymbollayerv2.cpp
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@ -622,19 +622,6 @@ void QgsLineDecorationSymbolLayerV2::stopRender( QgsSymbolV2RenderContext& conte
{
}
static double _calculateAngle( double x1, double y1, double x2, double y2 )
{
// return angle (in radians) between two points
if ( x1 == x2 )
return M_PI *( y2 >= y1 ? 1 / 2 : 3 / 2 ); // angle is 90 or 270
double t = ( y2 - y1 ) / ( x2 - x1 );
if ( t >= 0 )
return atan( t ) + ( y2 >= y1 ? 0 : M_PI );
else // t < 0
return atan( t ) + ( y2 >= y1 ? M_PI : 0 ); // atan is positive / negative
}
void QgsLineDecorationSymbolLayerV2::renderPolyline( const QPolygonF& points, QgsSymbolV2RenderContext& context )
{
// draw arrow at the end of line
@ -648,8 +635,8 @@ void QgsLineDecorationSymbolLayerV2::renderPolyline( const QPolygonF& points, Qg
int cnt = points.count();
QPointF p1 = points.at( cnt - 2 );
QPointF p2 = points.at( cnt - 1 );
double angle = _calculateAngle( p1.x(), p1.y(), p2.x(), p2.y() );
double angle = atan2( p2.y() - p1.y(), p2.x() - p1.x() );
double size = context.outputLineWidth( mWidth * 8 );
double angle1 = angle + M_PI / 6;
double angle2 = angle - M_PI / 6;