Files
solver/GNN/OndselSolver/StableBackwardDifference.h
forbes-0023 98051ba0c9 feat: add Phase 1 constraint solver addon, move prior content to GNN/
- Move existing OndselSolver, GNN ML layer, and tooling into GNN/
  directory for integration in later phases
- Add Create addon scaffold: package.xml, Init.py
- Add expression DAG with eval, symbolic diff, simplification
- Add parameter table with fixed/free variable tracking
- Add quaternion rotation as polynomial Expr trees
- Add RigidBody entity (7 DOF: position + unit quaternion)
- Add constraint classes: Coincident, DistancePointPoint, Fixed
- Add Newton-Raphson solver with symbolic Jacobian + numpy lstsq
- Add pre-solve passes: substitution + single-equation
- Add DOF counting via Jacobian SVD rank
- Add KindredSolver IKCSolver bridge for kcsolve integration
- Add 82 unit tests covering all modules

Registers as 'kindred' solver via kcsolve.register_solver() when
loaded by Create's addon_loader.
2026-02-20 20:35:47 -06:00

32 lines
1.4 KiB
C++

/***************************************************************************
* Copyright (c) 2023 Ondsel, Inc. *
* *
* This file is part of OndselSolver. *
* *
* See LICENSE file for details about copyright. *
***************************************************************************/
#pragma once
#include "FullRow.h"
#include "LinearMultiStepMethod.h"
namespace MbD {
class StableBackwardDifference : public LinearMultiStepMethod
{
//
public:
FColDsptr derivativepresentpast(size_t order, FColDsptr y, std::shared_ptr<std::vector<FColDsptr>> ypast) override;
void instantiateTaylorMatrix() override;
void formTaylorRowwithTimeNodederivative(size_t i, size_t ii, size_t k) override;
void formTaylorMatrix() override;
double pvdotpv() override;
FColDsptr derivativepresentpastpresentDerivativepastDerivative(size_t n,
FColDsptr y, std::shared_ptr<std::vector<FColDsptr>> ypast,
FColDsptr ydot, std::shared_ptr<std::vector<FColDsptr>> ydotpast) override;
FColDsptr derivativewith(size_t deriv, std::shared_ptr<std::vector<FColDsptr>> series);
};
}