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54 lines
1.2 KiB
C++
54 lines
1.2 KiB
C++
#include "common/rectc.h"
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#include "projection.h"
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#include "rectd.h"
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#define SAMPLE_POINTS 100
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static void growRect(const Projection &proj, const Coordinates &c, RectD &rect)
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{
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if (c.isNull())
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return;
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PointD p(proj.ll2xy(c));
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if (rect.isNull())
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rect = RectD(p, p);
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else {
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if (p.x() < rect.left())
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rect.setLeft(p.x());
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if (p.x() > rect.right())
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rect.setRight(p.x());
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if (p.y() < rect.bottom())
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rect.setBottom(p.y());
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if (p.y() > rect.top())
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rect.setTop(p.y());
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}
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}
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RectD::RectD(const RectC &rect, const Projection &proj)
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{
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RectD prect;
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double dx = (rect.right() - rect.left()) / SAMPLE_POINTS;
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double dy = (rect.top() - rect.bottom()) / SAMPLE_POINTS;
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growRect(proj, rect.topLeft(), prect);
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if (dx > 0) {
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for (int i = 0; i <= SAMPLE_POINTS; i++) {
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double x = rect.left() + i * dx;
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growRect(proj, Coordinates(x, rect.bottom()), prect);
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growRect(proj, Coordinates(x, rect.top()), prect);
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}
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}
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if (dy > 0) {
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for (int i = 0; i <= SAMPLE_POINTS; i++ ) {
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double y = rect.bottom() + i * dy;
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growRect(proj, Coordinates(rect.left(), y), prect);
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growRect(proj, Coordinates(rect.right(), y), prect);
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}
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}
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*this = prect;
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}
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