Files
solver/GNN/OndselSolver/ExpressionX.cpp
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

46 lines
1.3 KiB
C++

/***************************************************************************
* Copyright (c) 2023 Ondsel, Inc. *
* *
* This file is part of OndselSolver. *
* *
* See LICENSE file for details about copyright. *
***************************************************************************/
#include "ExpressionX.h"
#include "Constant.h"
using namespace MbD;
MbD::ExpressionX::ExpressionX(Symsptr arg) : FunctionX(arg)
{
}
void MbD::ExpressionX::xexpression(Symsptr arg, Symsptr func)
{
//"
//Future modification :
//Check that func is a function of arg.
//No need for self to be dependent of arg since self is dependent of func which is indirectly
//dependent of of arg.
//"
xx = arg;
expression = func;
}
Symsptr MbD::ExpressionX::differentiateWRTx()
{
return expression->differentiateWRT(xx);
}
Symsptr MbD::ExpressionX::differentiateWRT(Symsptr var)
{
if (this == var.get()) return sptrConstant(1.0);
return expression->differentiateWRT(var);
}
double MbD::ExpressionX::getValue()
{
return expression->getValue();
}