mirror of
https://github.com/tumic0/GPXSee.git
synced 2024-11-28 13:41:16 +01:00
87 lines
1.9 KiB
C++
87 lines
1.9 KiB
C++
#include <cmath>
|
|
#include "common/rectc.h"
|
|
#include "projection.h"
|
|
#include "rectd.h"
|
|
|
|
|
|
static void growRect(const Projection &proj, const Coordinates &c, RectD &rect)
|
|
{
|
|
PointD p(proj.ll2xy(c));
|
|
|
|
if (p.x() < rect.left())
|
|
rect.setLeft(p.x());
|
|
if (p.x() > rect.right())
|
|
rect.setRight(p.x());
|
|
if (p.y() > rect.top())
|
|
rect.setTop(p.y());
|
|
if (p.y() < rect.bottom())
|
|
rect.setBottom(p.y());
|
|
}
|
|
|
|
static void growRect(const Projection &proj, const PointD &p, RectC &rect)
|
|
{
|
|
Coordinates c(proj.xy2ll(p));
|
|
|
|
if (c.lon() < rect.left())
|
|
rect.setLeft(c.lon());
|
|
if (c.lon() > rect.right())
|
|
rect.setRight(c.lon());
|
|
if (c.lat() > rect.top())
|
|
rect.setTop(c.lat());
|
|
if (c.lat() < rect.bottom())
|
|
rect.setBottom(c.lat());
|
|
}
|
|
|
|
RectD::RectD(const RectC &rect, const Projection &proj, int samples)
|
|
{
|
|
if (!rect.isValid())
|
|
return;
|
|
|
|
double dx = rect.width() / samples;
|
|
double dy = rect.height() / samples;
|
|
|
|
PointD tl(proj.ll2xy(rect.topLeft()));
|
|
PointD br(proj.ll2xy(rect.bottomRight()));
|
|
RectD prect(tl, br);
|
|
|
|
for (int i = 0; i <= samples; i++) {
|
|
double x = remainder(rect.left() + i * dx, 360.0);
|
|
growRect(proj, Coordinates(x, rect.bottom()), prect);
|
|
growRect(proj, Coordinates(x, rect.top()), prect);
|
|
}
|
|
|
|
for (int i = 0; i <= samples; i++) {
|
|
double y = rect.bottom() + i * dy;
|
|
growRect(proj, Coordinates(rect.left(), y), prect);
|
|
growRect(proj, Coordinates(rect.right(), y), prect);
|
|
}
|
|
|
|
*this = prect;
|
|
}
|
|
|
|
RectC RectD::toRectC(const Projection &proj, int samples) const
|
|
{
|
|
if (!isValid())
|
|
return RectC();
|
|
|
|
double dx = width() / samples;
|
|
double dy = height() / samples;
|
|
|
|
Coordinates c(proj.xy2ll(center()));
|
|
RectC rect(c, c);
|
|
|
|
for (int i = 0; i <= samples; i++) {
|
|
double x = left() + i * dx;
|
|
growRect(proj, PointD(x, bottom()), rect);
|
|
growRect(proj, PointD(x, top()), rect);
|
|
}
|
|
|
|
for (int i = 0; i <= samples; i++) {
|
|
double y = bottom() + i * dy;
|
|
growRect(proj, PointD(left(), y), rect);
|
|
growRect(proj, PointD(right(), y), rect);
|
|
}
|
|
|
|
return rect;
|
|
}
|