#pragma once

// Optional CGAL Alpha Wrap backend for turning TRELLIS' arbitrary triangle
// soup into a closed solid.  The public wrapper stays dependency-free: builds
// without CGAL compile the same API and report the feature as unavailable.

#include <cstdint>
#include <string>
#include <vector>

namespace t2print {

bool available();

// alpha_ratio and offset_ratio are fractions of the input bounding-box
// diagonal (for example 0.01 and 0.01/30).  Alpha controls the smallest holes
// and cavities the wrap can enter; offset controls how tightly it encloses the
// source.  Alpha Wrap creates an entirely new surface, so material transfer is
// a separate closest-surface projection step (project_pbr below).
bool alpha_wrap(const std::vector<float> & source_verts,
                const std::vector<int32_t> & source_tris,
                float alpha_ratio,
                float offset_ratio,
                std::vector<float> & out_verts,
                std::vector<float> & out_normals,
                std::vector<int32_t> & out_tris,
                std::string & err);

// Project query points onto the closest source triangles and barycentrically
// interpolate their six-channel per-vertex PBR values.  This is the portable
// CPU counterpart of upstream's cuBVH texture reprojection.  Query/output order
// is preserved; query_points contains xyz triples and out_pbr receives six
// floats per query.
bool project_pbr(const std::vector<float> & source_verts,
                 const std::vector<int32_t> & source_tris,
                 const std::vector<float> & source_pbr,
                 const std::vector<float> & query_points,
                 std::vector<float> & out_pbr,
                 std::string & err);

} // namespace t2print