bool TileProjection::GeoToPixel(const GeoCoord& coord,
double& x, double& y) const
{
assert(valid);
x=coord.GetLon()*scaleGradtorad-lonOffset;
y=height-(scale*atanh(sin(coord.GetLat()*gradtorad))-latOffset);
return true;
}
void SortWayDataGenerator::GetTopLeftCoordinate(const Way& data,
GeoCoord& coord)
{
coord=data.nodes[0];
for (size_t n=1; n<data.nodes.size(); n++) {
coord.Set(std::max(coord.GetLat(),data.nodes[n].GetLat()),
std::min(coord.GetLon(),data.nodes[n].GetLon()));
}
}
bool MercatorProjection::GeoToPixel(const GeoCoord& coord,
double& x, double& y) const
{
assert(valid);
// Screen coordinate relative to center of image
x=(coord.GetLon()-this->lon)*scaleGradtorad;
y=(atanh(sin(coord.GetLat()*gradtorad))-latOffset)*scale;
if (angle!=0.0) {
double xn=x*angleNegCos-y*angleNegSin;
double yn=x*angleNegSin+y*angleNegCos;
x=xn;
y=yn;
}
// Transform to canvas coordinate
y=height/2-y;
x+=width/2;
return true;
}
double GeoCoord::GetDistance(GeoCoord target)
{
return GetEllipsoidalDistance(GetLon(), GetLat(), target.GetLon(), target.GetLat());
}
