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// SPDX-FileCopyrightText: Copyright (c) 2025, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
#include "geometry_api.h"
using namespace std;
template<typename T>
void pt_assign(torch::TensorAccessor<T, 1> acc, T x, T y)
{
acc[0] = x;
acc[1] = y;
}
template<typename T>
void poly_bounds_quad_impl(torch::TensorAccessor<T, 2> poly, torch::TensorAccessor<T, 2> outBounds)
{
T minX = poly[0][0],
minY = poly[0][1],
maxX = poly[0][0],
maxY = poly[0][1];
const int64_t numVertices = poly.size(0);
for (int64_t i = 0; i < numVertices; ++i) {
auto vert = poly[i];
minX = min(minX, vert[0]);
maxX = max(maxX, vert[0]);
minY = min(minY, vert[1]);
maxY = max(maxY, vert[1]);
}
pt_assign(outBounds[0], minX, minY);
pt_assign(outBounds[1], maxX, minY);
pt_assign(outBounds[2], maxX, maxY);
pt_assign(outBounds[3], minX, maxY);
}
torch::Tensor get_poly_bounds_quad(torch::Tensor poly)
{
auto ret = torch::empty({ 4, 2 }, poly.options());
AT_DISPATCH_FLOATING_TYPES(
poly.scalar_type(),
"poly_bounds_quad_impl",
([&] {
poly_bounds_quad_impl(
poly.accessor<scalar_t, 2>(),
ret.accessor<scalar_t, 2>()
);
})
);
return ret;
}
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