Cool. I committed that patch in trunk in what will be 6.2 if folks are interested. I'll add a few other functions too (see ticket #3871).
Regarding other uses, sure it's possible. We'd need to add the GEOMTRANSFORM processing to labels and execute it before computing a label point. I've also thought about defining a layer-level GEOMTRANSFORM that would alter the original geometry before any processing so all classes and styles would be affected and you could query it. ;-) Your last idea (8) is a bit different. Here's you're talking about a drawing effect so we're back into styles, but in this case a label's style. Issue here is that a label has two geometries - the point, and the bbox(es) so which are you referencing with [shape]? I'm thinking that in this context we'd always mean the bbox(es) so you could create a buffered convex hull easily and draw it under a label. Probably should create a couple of tickets... Steve -----Original Message----- From: Brent Fraser [mailto:[email protected]] Sent: Thursday, May 12, 2011 10:08 AM To: Lime, Steve D (DNR) Cc: [email protected] Subject: Rendering Challenges - GEOMTRANSFORM Steve, Thanks to your patch I was able to render thick lines inside polygons (http://i56.tinypic.com/1z347yq.jpg). The solution of using a STYLE with GEOMTRANSFORM got me thinking of using the technique to solve some of the labeling challenges: 2. Place polygon annotation on/inside boundary line (http://trac.osgeo.org/mapserver/ticket/1592 point 8.) - label the line geometry resulting from GEOMTRANSFORM (buffer([shape], -3)) of the original polygon 5. Place line anno above (or below) when using ANGLE FOLLOW - label the line geometry resulting from GEOMTRANSFORM (buffer([shape], 5)) of the original line Currently the LABEL object uses the original geometry. Do you think it would be possible to [optionally?] use the GEOMTRANSFORMed geometry? Similarly, would it be possible to have the LABEL's convex hull (or a buffer the character boxes?) used as a clipping polygons of the layer's geometry to address: 8. Erase layer's geometry (but not other layers) under label - possible syntax: GEOMTRANSFORM ( clip( [labelpoly] ) ) Your thoughts? -- Best Regards, Brent Fraser _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
