ae5db7216e
Implements getEuclideanCircleFromHyperbolic() in C++ (hyperboloid model → Poincaré disk via Lorentz boost + circumcircle). Ports the 2 Java tests that were the only remaining candidates not requiring HDS or a solver. All other unported tests (DataTypesTest, SchottkyIOTest, UniformizationDataTest, BranchedCoverTorusTest) are blocked by XML serialization or HDS – stubs remain for Phase 4. Test totals: 36 registered | 23 passed | 13 skipped | 0 failed. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
51 lines
2.2 KiB
C++
51 lines
2.2 KiB
C++
// Port of de.varylab.discreteconformal.plugin.HyperIdealVisualizationPluginTest (Java/JUnit).
|
|
//
|
|
// Tests the conversion from a hyperbolic circle (hyperboloid model)
|
|
// to its Euclidean representation (Poincaré disk model).
|
|
//
|
|
// Java test: static method HyperIdealVisualizationPlugin
|
|
// .getEuclideanCircleFromHyperbolic(double[] center, double radius)
|
|
// C++ port: conformallab::getEuclideanCircleFromHyperbolic(Vector4d, double)
|
|
// in hyper_ideal_visualization_utility.hpp
|
|
|
|
#include "hyper_ideal_visualization_utility.hpp"
|
|
#include <gtest/gtest.h>
|
|
#include <cmath>
|
|
|
|
using namespace conformallab;
|
|
|
|
// Corresponds to Java testGetEuclideanCircleFromHyperbolic_Centered()
|
|
//
|
|
// A hyperbolic circle centered at the origin (0,0,0,1) with radius 1.
|
|
// In the Poincaré disk this maps to a Euclidean circle centered at (0,0)
|
|
// with radius sinh(1) / (cosh(1) + 1).
|
|
TEST(HyperIdealVisualizationUtilityTest, EuclideanCircleFromHyperbolic_Centered)
|
|
{
|
|
Eigen::Vector4d center(0.0, 0.0, 0.0, 1.0);
|
|
const double radius = 1.0;
|
|
|
|
auto result = getEuclideanCircleFromHyperbolic(center, radius);
|
|
|
|
const double expected_r = std::sinh(1.0) / (std::cosh(1.0) + 1.0);
|
|
EXPECT_NEAR(0.0, result[0], 1E-12) << "Euclidean cx should be 0";
|
|
EXPECT_NEAR(0.0, result[1], 1E-12) << "Euclidean cy should be 0";
|
|
EXPECT_NEAR(expected_r, result[2], 1E-12) << "Euclidean radius mismatch";
|
|
}
|
|
|
|
// Corresponds to Java testGetEuclideanCircleFromHyperbolic_OffCenter()
|
|
//
|
|
// A hyperbolic circle centered at (sinh(1),0,0,cosh(1)) with radius 1.
|
|
// By symmetry (center is on the x-axis, circle is symmetric about it):
|
|
// • the Euclidean center lies on the x-axis → cy = 0
|
|
// • the Euclidean center equals the radius → cx = r (the circle passes through the Poincaré origin)
|
|
TEST(HyperIdealVisualizationUtilityTest, EuclideanCircleFromHyperbolic_OffCenter)
|
|
{
|
|
Eigen::Vector4d center(std::sinh(1.0), 0.0, 0.0, std::cosh(1.0));
|
|
const double radius = 1.0;
|
|
|
|
auto result = getEuclideanCircleFromHyperbolic(center, radius);
|
|
|
|
EXPECT_NEAR(result[0], result[2], 1E-12) << "cx should equal Euclidean radius";
|
|
EXPECT_NEAR(0.0, result[1], 1E-12) << "cy should be 0 (x-axis symmetry)";
|
|
}
|