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Add to_index() function to convert coords to scalar.

This commit is contained in:
King_DuckZ 2015-08-16 20:32:58 +02:00
parent a1996b2d75
commit cb9e4bce19
3 changed files with 59 additions and 0 deletions
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6
include/doorkeeper/components/tilecoords.hpp
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@ -48,6 +48,12 @@ namespace dk {
CoordinateScalarType sub_mod ( CoordinateScalarType parA, CoordinateScalarType parB, CoordinateScalarType parDiv ) a_pure;
CoordinateScalarType sub_div ( CoordinateScalarType parA, CoordinateScalarType parB, CoordinateScalarType parDiv ) a_pure;
} //namespace implem
template <uint32_t D>
CoordinateDistType to_index ( const Vector<D>& parPos, const Vector<D>& parUpper ) a_pure;
template <uint32_t D>
CoordinateDistType to_index ( const TileCoords<D>& parTC ) a_pure;
} //namespace dk
#include "doorkeeper/implem/tilecoords.inl"

26
include/doorkeeper/implem/tilecoords.inl
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@ -40,6 +40,32 @@ namespace dk {
}
} //namespace implem
template <uint32_t D>
inline CoordinateDistType to_index (const Vector<D>& parPos, const Vector<D>& parUpper) {
CoordinateDistType index = 0;
for (CoordinateDistType d = 0; d < D; ++d) {
auto pos = static_cast<CoordinateDistType>(parPos[D - 1 - d]);
for (CoordinateDistType p = 0; p < D - 1 - d; ++p) {
pos *= static_cast<CoordinateDistType>(parUpper[p] + 1);
}
index += pos;
}
return index;
}
#if defined(NDEBUG)
template <>
inline CoordinateDistType to_index<2> (const Vector<2>& parPos, const Vector<2>& parUpper) {
return parPos.y() * (parUpper.x() + 1) + parPos.x();
}
#endif
template <uint32_t D>
inline CoordinateDistType to_index (const TileCoords<D>& parTC) {
return to_index<D>(parTC.position(), parTC.upper());
}
template <uint32_t D>
TileCoords<D>::TileCoords (const coords& parSize) :
m_pos(CoordinateScalarType(0)),

27
test/unit/tilecoords.cpp
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@ -140,3 +140,30 @@ TEST(back_forward, tilecoords) {
EXPECT_EQ(coords4(69, 1934, 3, 0), test.position());
}
}
TEST(to_index, tilecoords) {
typedef dk::TileCoords<2> tcoords2;
typedef dk::TileCoords<2>::coords coords2;
{
const coords2 max_coords(1000);
tcoords2 test(max_coords);
EXPECT_EQ(0, dk::to_index(test));
++test;
EXPECT_EQ(1, dk::to_index(test));
--test;
EXPECT_EQ(0, dk::to_index(test));
test += 1;
EXPECT_EQ(1, dk::to_index(test));
test += 1;
EXPECT_EQ(2, dk::to_index(test));
test += 1501;
EXPECT_EQ(1503, dk::to_index(test));
}
}