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#include "coding/pointd_to_pointu.hpp"
#include "geometry/mercator.hpp"
#include "base/bits.hpp"
#include "base/math.hpp"
namespace
{
double CoordSize(uint32_t coordBits) { return (1 << coordBits) - 1; }
} // namespace
uint32_t DoubleToUint32(double x, double min, double max, uint32_t coordBits)
{
ASSERT_GREATER_OR_EQUAL(coordBits, 1, ());
ASSERT_LESS_OR_EQUAL(coordBits, 32, ());
x = my::clamp(x, min, max);
return static_cast<uint32_t>(0.5 + (x - min) / (max - min) * bits::GetFullMask(static_cast<uint8_t>(coordBits)));
}
double Uint32ToDouble(uint32_t x, double min, double max, uint32_t coordBits)
{
ASSERT_GREATER_OR_EQUAL(coordBits, 1, ());
ASSERT_LESS_OR_EQUAL(coordBits, 32, ());
return min + static_cast<double>(x) * (max - min) / bits::GetFullMask(static_cast<uint8_t>(coordBits));
}
m2::PointU PointDToPointU(double x, double y, uint32_t coordBits)
{
x = my::clamp(x, MercatorBounds::minX, MercatorBounds::maxX);
y = my::clamp(y, MercatorBounds::minY, MercatorBounds::maxY);
uint32_t const ix = static_cast<uint32_t>(0.5 +
(x - MercatorBounds::minX) /
(MercatorBounds::maxX - MercatorBounds::minX) *
CoordSize(coordBits));
uint32_t const iy = static_cast<uint32_t>(0.5 +
(y - MercatorBounds::minY) /
(MercatorBounds::maxY - MercatorBounds::minY) *
CoordSize(coordBits));
ASSERT_LESS_OR_EQUAL(ix, CoordSize(coordBits), ());
ASSERT_LESS_OR_EQUAL(iy, CoordSize(coordBits), ());
return m2::PointU(ix, iy);
}
m2::PointU PointDToPointU(m2::PointD const & pt, uint32_t coordBits)
{
return PointDToPointU(pt.x, pt.y, coordBits);
}
m2::PointD PointUToPointD(m2::PointU const & pt, uint32_t coordBits)
{
return m2::PointD(static_cast<double>(pt.x) * (MercatorBounds::maxX - MercatorBounds::minX) /
CoordSize(coordBits) +
MercatorBounds::minX,
static_cast<double>(pt.y) * (MercatorBounds::maxY - MercatorBounds::minY) /
CoordSize(coordBits) +
MercatorBounds::minY);
}
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