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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "GEO_reverse_uv_sampler.hh"
#include "BLI_math_geom.h"
namespace blender::geometry {
ReverseUVSampler::ReverseUVSampler(const Span<float2> uv_map, const Span<MLoopTri> looptris)
: uv_map_(uv_map), looptris_(looptris)
{
}
ReverseUVSampler::Result ReverseUVSampler::sample(const float2 &query_uv) const
{
for (const MLoopTri &looptri : looptris_) {
const float2 &uv0 = uv_map_[looptri.tri[0]];
const float2 &uv1 = uv_map_[looptri.tri[1]];
const float2 &uv2 = uv_map_[looptri.tri[2]];
float3 bary_weights;
if (!barycentric_coords_v2(uv0, uv1, uv2, query_uv, bary_weights)) {
continue;
}
if (IN_RANGE_INCL(bary_weights.x, 0.0f, 1.0f) && IN_RANGE_INCL(bary_weights.y, 0.0f, 1.0f) &&
IN_RANGE_INCL(bary_weights.z, 0.0f, 1.0f)) {
return Result{ResultType::Ok, &looptri, bary_weights};
}
}
return Result{};
}
} // namespace blender::geometry
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