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Add to_index() function to convert coords to scalar.

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King_DuckZ 2015-08-16 20:32:58 +02:00
commit cb9e4bce19
3 changed files with 59 additions and 0 deletions
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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)),