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Support matrices in gltf_accessor_iterator

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This commit is contained in:
Nikita Lisitsa 2024-06-08 17:33:14 +03:00
parent 6d13bfa407
commit aa32b09fca
2 changed files with 38 additions and 3 deletions
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38
libs/gfx/include/psemek/gfx/gltf_accessor_iterator.hpp
View file

@ -22,6 +22,9 @@ namespace psemek::gfx
{
return &value;
}
static void finalize(T &)
{}
};
template <typename T>
@ -31,9 +34,7 @@ namespace psemek::gfx
template <typename T>
struct accessor_traits
: accessor_traits_helper<T, std::is_arithmetic_v<T>>
{
};
{};
template <typename T, std::size_t N>
struct accessor_traits<geom::vector<T, N>>
@ -46,6 +47,9 @@ namespace psemek::gfx
{
return &value[0];
}
static void finalize(geom::vector<T, N> &)
{}
};
template <typename T, std::size_t N>
@ -59,6 +63,9 @@ namespace psemek::gfx
{
return &value[0];
}
static void finalize(geom::point<T, N> &)
{}
};
template <typename T>
@ -72,6 +79,29 @@ namespace psemek::gfx
{
return &value[0];
}
static void finalize(geom::quaternion<T> &)
{}
};
template <typename T, std::size_t R, std::size_t C>
struct accessor_traits<geom::matrix<T, R, C>>
{
static constexpr bool is_floating_point = accessor_traits<T>::is_floating_point;
static constexpr std::size_t components = R * C;
using component_type = T;
static auto pointer(geom::matrix<T, R, C> & value)
{
return &value[0][0];
}
static void finalize(geom::matrix<T, R, C> & value)
{
geom::matrix<T, C, R> temp;
std::copy(value.coords, value.coords + R * C, temp.coords);
value = geom::transpose(temp);
}
};
template <typename T>
@ -189,6 +219,8 @@ namespace psemek::gfx
ptr += component_size(accessor.component_type);
}
traits::finalize(result);
return result;
}

3
libs/gfx/include/psemek/gfx/gltf_parser.hpp
View file

@ -221,6 +221,9 @@ namespace psemek::gfx
case type_t::vec2: return 2;
case type_t::vec3: return 3;
case type_t::vec4: return 4;
case type_t::mat2: return 4;
case type_t::mat3: return 9;
case type_t::mat4: return 16;
default: throw util::exception("Unsupported attribute type");
}
}