void edTerrainNode::fixupTexCoords(osg::Vec2Array &coords)
{
if (coords.size()<1)
return;
osg::Vec2 min(coords[0]);
osg::Vec2 max(coords[0]);
for (unsigned int i=1; i<coords.size(); i++)
{
if (coords[i].x()>max.x())
max.x()= coords[i].x();
if (coords[i].x()<min.x())
min.x()= coords[i].x();
if (coords[i].y()>max.y())
max.y()= coords[i].y();
if (coords[i].y()<min.y())
min.y()= coords[i].y();
}
osg::Vec2 delta( floor((min.x()+max.x())*0.5+0.5),floor((min.y()+max.y())*0.5+0.5) ) ;
for (unsigned int i=0; i<coords.size(); i++)
coords[i]-= delta;
}
virtual void apply(osg::Vec2Array& array)
{
if (_pointList.size()!=array.size()) return;
for(unsigned int i=0;i<_pointList.size();++i)
{
_pointList[i] = new EdgeCollector::Point;
_pointList[i]->_index = i;
osgUtil::ConvertVec<osg::Vec2, osg::Vec3d>::convert(array[i], _pointList[i]->_vertex);
}
}
void DrawUpdateCallback::interpolate(double t, const osg::Vec2Array& src, const osg::Vec2Array& dst, osg::Vec2Array& result)
{
result.resize(4);
if (t >= 1.0) {
for (int i = 0; i < 4; i++) {
result[i] = dst[i];
}
return;
} else if (t <= 0) {
for (int i = 0; i < 4; i++) {
result[i] = src[i];
}
return;
}
double t1 = 1.0 - t;
for (int i = 0; i < 4; i++) {
result[i] = src[i]*t1 + dst[i]*t;
}
}