[Geotools-devel] [jira] (GEOT-4579) Labels not painted with vendor option "followLine"

[Bruno da Fonseca (JIRA)]

Bruno da Fonseca created GEOT-4579 Labels not painted with vendor option "followLine" Issue Type: Bug Affects Versions: 10.0 Assignee: Andrea Aime Components: render Created: 26/Sep/13 4:06 AM Description: When vendor option "followLine" is specified for labeling along a line sometimes the labels are not painted because the angle between segments of a line exceed the maximum angle allowed. That's correct but there are times that the obtained angle between segments shouldn't exceed the maximum angle allowed. For instance, suppose that a segment has an angle of -170º and another one an 170º angle with coordinate axis. When doing the difference between the two we get an angle of -340º or 340º when it should be 40º or -40º. The problem is at method "getMaxAngleChange" of class "LineStringCursor". The method "getSegmentAngle" returns an angle between pi and -pi. The code line "double difference = currAngle - prevAngle" can result in an angle between -2pi and 2pi. When "difference" exceeds pi it should be subtracted by 2pi or if it is lower than -pi then it should be summed with 2pi. With that we allways have and angle between -pi and pi and there will be more labels to be painted. Environment: Geoserver 2.4.0, Windows server 2008 Project: GeoTools Priority: Major Reporter: Bruno da Fonseca

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