scale_path.hpp

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#ifndef GENERATOR_SCALEPATH_HPP
#define GENERATOR_SCALEPATH_HPP
 
#include "transform_path.hpp"
 
namespace generator
{
 
template<typename path_t>
class scale_path_t
{
private:
    using impl_t = transform_path_t<path_t>;
    impl_t transform_path_;
 
public:
    scale_path_t(path_t path, const gml::dvec3& scale)
        : transform_path_{std::move(path),
                          [scale](path_vertex_t& value)
                          {
                              value.position *= scale;
                              value.tangent = gml::normalize(scale * value.tangent);
                              value.normal = gml::normalize(scale * value.normal);
                          }}
    {
    }
 
    using edges_t = typename impl_t::edges_t;
 
    edges_t edges() const noexcept
    {
        return transform_path_.edges();
    }
 
    using vertices_t = typename impl_t::vertices_t;
 
    vertices_t vertices() const noexcept
    {
        return transform_path_.vertices();
    }
};
 
template<typename path_t>
scale_path_t<path_t> scale_path(path_t path, const gml::dvec3& scale)
{
    return scale_path_t<path_t>{std::move(path), scale};
}
} // namespace generator
 
#endif