vinihcrosaandClaude Sonnet 4.6
dd4e79cbd6
NavalForceModel bridge pattern keeps core::ForceModel interface intact while providing NavalContext (environment, speedToWater, speedToWind, EMA q_avg) to all naval models via bindContext. Force models: Inertial (Coriolis), Restoring (hydrostatic spring), Damping (potential + linear/quadratic), Squat (ICORELS shallow-water), Wind (REGULAR/ACSINKAGE), Current (OBOKATA section-integration and REGULAR with Van der Pol VIM RK4), Thrust (open-water Kt), Rudder (Prandtl lift), Tug (PUSH/PULL/ESCORTING with bilinear table). Wave engine: JONSWAP/PIERSON/REGULAR spectrum, Mitsuyasu cos-2S directional spreading, WAMIT RAO interpolation in WaveForces. NavalSimulation wraps core::Simulation, rebuilds NavalContext each step, maintains EMA (tau=16.5s). 63/63 tests pass. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
60 lines
1.5 KiB
C++
60 lines
1.5 KiB
C++
#include <catch2/catch_test_macros.hpp>
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#include <catch2/catch_approx.hpp>
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#include <ymir/naval/forces/RudderForces.h>
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#include <ymir/naval/NavalContext.h>
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#include <ymir/core/BodyState.h>
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using Catch::Approx;
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using namespace ymir::naval;
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static NavalContext makeCtx(double u = 5.0)
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{
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ymir::Vector6 q{};
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ymir::Vector6 qdot{};
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qdot[0] = u;
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ymir::BodyState bs(q, qdot, 0.0, 0.1);
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NavalContext ctx{};
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ctx.state = bs;
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ctx.speedToWater[0] = u;
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return ctx;
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}
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TEST_CASE("RudderForces zero angle produces no lateral force")
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{
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RudderForces::Config cfg{};
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RudderForces::RudderConfig r{};
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r.position = {-50.0, 0.0, -3.0};
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r.area = 20.0;
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r.aspectRatio = 2.0;
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r.angle_deg = 0.0;
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cfg.rudders.push_back(r);
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RudderForces model(cfg);
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NavalContext ctx = makeCtx(5.0);
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model.bindContext(&ctx);
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auto forces = model.compute(ctx.state);
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REQUIRE(forces.f[1] == Approx(0.0).margin(1e-6));
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REQUIRE(forces.f[5] == Approx(0.0).margin(1e-6));
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}
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TEST_CASE("RudderForces positive angle produces sway force and yaw moment")
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{
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RudderForces::Config cfg{};
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RudderForces::RudderConfig r{};
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r.position = {-50.0, 0.0, -3.0};
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r.area = 20.0;
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r.aspectRatio = 2.0;
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r.angle_deg = 20.0; // 20 degree rudder
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cfg.rudders.push_back(r);
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RudderForces model(cfg);
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NavalContext ctx = makeCtx(5.0);
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model.bindContext(&ctx);
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auto forces = model.compute(ctx.state);
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REQUIRE(forces.f[1] != Approx(0.0).margin(1e-3));
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REQUIRE(forces.f[5] != Approx(0.0).margin(1e-3));
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}
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