Hi, I am pretty new to OSG but have been working on it for the past few weeks. I have an application that is rendering a 2D terrain with a constant width. When I rotate my display the line sometime appears broken.
There are no other layers present. I have attached an example. This terrain should be solid and sometimes is depending upon the viewing angle. Does anyone have any suggestions as to what is happening or what I might be able to do to fix it? Thank you! Cheers, Adrian Code: osg::ref_ptr<osg::Vec3Array> vertexData = new osg::Vec3Array; osg::Vec4Array* colors = new osg::Vec4Array; colors->push_back(_settingPtr->int2osgColor(3394636)); _terrain2dGeom->setColorArray(colors, osg::Array::BIND_OVERALL); _terrain2dGeom->setNormalBinding(osg::Geometry::BIND_OVERALL); _terrain2dGeom->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF); _terrain2dGeom->addPrimitiveSet(new osg::DrawArrays(GL_QUAD_STRIP, 0, 2 * TerrainData.size())); osg::Vec3d _frontVec, _up, _sideVec , _prevPos; for (int i = 0; i < TerrainData.size(); i++) { VbTerrainData terrainItem = TerrainData.at(i); osg::Vec3d longlat = osg::Vec3d(terrainItem.y, terrainItem.x, terrainItem.z); _up = lonlat2Metric(osg::Vec3d(longlat.x(), longlat.y(), longlat.z())); if (i == 0) { _prevPos = _up; VbTerrainData terrainNextItem = TerrainData.at(1); osg::Vec3d nextlonglat = osg::Vec3d(terrainNextItem.y, terrainNextItem.x, terrainNextItem.z); _frontVec = lonlat2Metric(osg::Vec3d(nextlonglat.x(), nextlonglat.y(), nextlonglat.z())) - _prevPos; } else { _frontVec = _up - _prevPos; _prevPos = _up; } _sideVec = _up ^ _frontVec; _sideVec.normalize(); vertexData->push_back(_up + _sideVec*width/2); vertexData->push_back(_up - _sideVec*width/2); } _terrain2dGeom->setVertexArray(vertexData.get()); _swTerrain->addChild(_terrain2dGeom); _swTerrain->setValue(0, true); ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=72783#72783 Attachments: http://forum.openscenegraph.org//files/terrain_172.jpg _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org