[cad] Fix invalid coordinates when x/y snapping is enabled and

nyalldawson · nyalldawson · commit aa6347eb9ba7 · 2016-05-16T16:02:30.000+10:00
subsequent segments are parallel (cherry-picked from 90d116c)
diff --git a/src/gui/qgsadvanceddigitizingdockwidget.cpp b/src/gui/qgsadvanceddigitizingdockwidget.cpp
@@ -574,7 +574,7 @@ bool QgsAdvancedDigitizingDockWidget::applyConstraints( QgsMapMouseEvent* e )
     }
     else if ( mXConstraint->isLocked() )
     {
-      if ( cosa == 0 )
+      if ( qgsDoubleNear( cosa, 0.0 ) )
       {
         res = false;
       }
@@ -590,7 +590,7 @@ bool QgsAdvancedDigitizingDockWidget::applyConstraints( QgsMapMouseEvent* e )
     }
     else if ( mYConstraint->isLocked() )
     {
-      if ( sina == 0 )
+      if ( qgsDoubleNear( sina, 0.0 ) )
       {
         res = false;
       }

Original file line number	Diff line number	Diff line change
`@@ -574,7 +574,7 @@ bool QgsAdvancedDigitizingDockWidget::applyConstraints( QgsMapMouseEvent* e )`
`574`	`574`	`}`
`575`	`575`	`else if ( mXConstraint->isLocked() )`
`576`	`576`	`{`
`577`		`- if ( cosa == 0 )`
	`577`	`+ if ( qgsDoubleNear( cosa, 0.0 ) )`
`578`	`578`	`{`
`579`	`579`	`res = false;`
`580`	`580`	`}`
`@@ -590,7 +590,7 @@ bool QgsAdvancedDigitizingDockWidget::applyConstraints( QgsMapMouseEvent* e )`
`590`	`590`	`}`
`591`	`591`	`else if ( mYConstraint->isLocked() )`
`592`	`592`	`{`
`593`		`- if ( sina == 0 )`
	`593`	`+ if ( qgsDoubleNear( sina, 0.0 ) )`
`594`	`594`	`{`
`595`	`595`	`res = false;`
`596`	`596`	`}`