Hi All, I am developing tiled vector rendering in OSSIM. I like the Qgis vector rendering system
point.shp contains 9,99,999 points which are generated by grass for using v.random and ~27MB in size roads.shp contains 2,28,068 linestrings and is ~50MB in size these point.shp and roads.shp data gets rendered in ~10 sec When I read vector using ogr and parse feature and draw point/linestring my application taking about 40 sec to render point.shp and I am using Qt4 with QPainter not QGraphicsView How came this time gap? i see Rtree and pal libs in src/core source code Does they have any role in rendering? Does QGIS Rendering uses threading? How to get a minimal of QGIS code to hack it and build a new vector rendering because I need it to make it tiled rendering vectors? How to improve performance in rendering without qgis? --- Regards, Mohammed Rashad K M M.S. (By Research) student Lab for Spatial Informatics Department of CSE International Institute of Information Technology Hyderabad, India
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