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#include <catch2/catch.hpp>
#include <test_utils.hpp>
#include <libslic3r/Optimize/BruteforceOptimizer.hpp>
#include <libslic3r/Optimize/NLoptOptimizer.hpp>
void check_opt_result(double score, double ref, double abs_err, double rel_err)
{
double abs_diff = std::abs(score - ref);
double rel_diff = std::abs(abs_diff / std::abs(ref));
bool abs_reached = abs_diff < abs_err;
bool rel_reached = rel_diff < rel_err;
bool precision_reached = abs_reached || rel_reached;
REQUIRE(precision_reached);
}
template<class Opt> void test_sin(Opt &&opt)
{
using namespace Slic3r::opt;
auto optfunc = [](const auto &in) {
auto [phi] = in;
return std::sin(phi);
};
auto init = initvals({PI});
auto optbounds = bounds({ {0., 2 * PI}});
Result result_min = opt.to_min().optimize(optfunc, init, optbounds);
Result result_max = opt.to_max().optimize(optfunc, init, optbounds);
check_opt_result(result_min.score, -1., 1e-2, 1e-4);
check_opt_result(result_max.score, 1., 1e-2, 1e-4);
}
template<class Opt> void test_sphere_func(Opt &&opt)
{
using namespace Slic3r::opt;
Result result = opt.to_min().optimize([](const auto &in) {
auto [x, y] = in;
return x * x + y * y + 1.;
}, initvals({.6, -0.2}), bounds({{-1., 1.}, {-1., 1.}}));
check_opt_result(result.score, 1., 1e-2, 1e-4);
}
TEST_CASE("Test brute force optimzer for basic 1D and 2D functions", "[Opt]") {
using namespace Slic3r::opt;
Optimizer<AlgBruteForce> opt;
test_sin(opt);
test_sphere_func(opt);
}
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