Interface representing either Variable, Cost or Constraint. More...
#include <composite.h>
Public Member Functions | |
| Component (int num_rows, const std::string &name) | |
| Creates a component. | |
| virtual VecBound | GetBounds () const =0 |
| Returns the "bounds" of this component. | |
| virtual Jacobian | GetJacobian () const =0 |
| Returns derivatives of each row w.r.t. the variables. | |
| std::string | GetName () const |
| Returns the name (id) of this component. | |
| int | GetRows () const |
| Returns the number of rows of this component. | |
| virtual VectorXd | GetValues () const =0 |
| Returns the "values" of whatever this component represents. | |
| virtual void | Print () const |
| Prints the relevant information (name, rows, values) of this component. | |
| void | SetRows (int num_rows) |
| Sets the number of rows of this component. | |
| virtual void | SetVariables (const VectorXd &x)=0 |
| Sets the optimization variables from an Eigen vector. | |
| virtual | ~Component () |
Static Public Attributes | |
| static const int | kSpecifyLater = -1 |
Private Attributes | |
| std::string | name_ |
| int | num_rows_ = kSpecifyLater |
Detailed Description
Interface representing either Variable, Cost or Constraint.
This structure allows a user to define individual and independent variable sets, constraints and costs without having to worry about how to organize them with respect to each other.
The high-level idea is that variables, costs and constraints can all be fit into the same interface (Component). For example, each has a "value", which is either the actual value of the variables, the constraint value g or the cost. Additionally, a real-world optimization problem usually doesn't just contain one set of variables, but is comprised of multiple variable sets, constraints and cost terms (Composite). This representation provides one common interface ("smallest common denominator") that can be contain either individual variables/costs/constraints or a Composite of these. This pattern takes care of stacking variables, ordering Jacobians and providing bounds for the complete problem without duplicating code.
For more information on the composite pattern visit https://sourcemaking.com/design_patterns/composite
Definition at line 71 of file composite.h.
Constructor & Destructor Documentation
| ifopt::Component::Component | ( | int | num_rows, |
| const std::string & | name | ||
| ) |
Creates a component.
- Parameters:
-
num_rows The number of rows of this components. name The identifier for this component.
The number of rows num_rows can represent either
- number of variables in this variables set
- number of constraints in this constraint set
- 1 if this component represents a Cost.
Definition at line 36 of file composite.cc.
| virtual ifopt::Component::~Component | ( | ) | [virtual] |
Member Function Documentation
| virtual VecBound ifopt::Component::GetBounds | ( | ) | const [pure virtual] |
Returns the "bounds" of this component.
- For Variable these are the upper and lower variable bound.
- For Constraint this represents the constraint bounds.
- For Cost these done't exists (set to infinity).
Implemented in ifopt::Composite, ifopt::ExConstraint, ifopt::ExVariables, ifopt::CostTerm, and ifopt::ExComponent.
| virtual Jacobian ifopt::Component::GetJacobian | ( | ) | const [pure virtual] |
Returns derivatives of each row w.r.t. the variables.
- For Constraint this is a matrix with one row per constraint.
- For a Cost this is a row vector (gradient transpose).
- Not sensible for Variable.
Implemented in ifopt::Composite, ifopt::ConstraintSet, ifopt::VariableSet, and ifopt::ExComponent.
| std::string ifopt::Component::GetName | ( | ) | const |
Returns the name (id) of this component.
Definition at line 55 of file composite.cc.
| int ifopt::Component::GetRows | ( | ) | const |
Returns the number of rows of this component.
Definition at line 43 of file composite.cc.
| virtual VectorXd ifopt::Component::GetValues | ( | ) | const [pure virtual] |
Returns the "values" of whatever this component represents.
- For Variable this represents the actual optimization values.
- For Constraint this represents the constraint value g.
- For Cost this represents the cost value.
Implemented in ifopt::Composite, ifopt::ExConstraint, ifopt::ExVariables, ifopt::CostTerm, and ifopt::ExComponent.
| void ifopt::Component::Print | ( | ) | const [virtual] |
Prints the relevant information (name, rows, values) of this component.
Reimplemented in ifopt::Composite.
Definition at line 181 of file composite.cc.
| void ifopt::Component::SetRows | ( | int | num_rows | ) |
Sets the number of rows of this component.
- Attention:
- This should correctly be done through constructor call, only delay this by using
kSpecifyLaterif you have good reason.
Definition at line 49 of file composite.cc.
| virtual void ifopt::Component::SetVariables | ( | const VectorXd & | x | ) | [pure virtual] |
Sets the optimization variables from an Eigen vector.
This is only done for Variable, where these are set from the current values of the NLP solvers.
Implemented in ifopt::Composite, ifopt::ConstraintSet, ifopt::ExVariables, and ifopt::ExComponent.
Member Data Documentation
const int ifopt::Component::kSpecifyLater = -1 [static] |
Definition at line 149 of file composite.h.
std::string ifopt::Component::name_ [private] |
Definition at line 153 of file composite.h.
int ifopt::Component::num_rows_ = kSpecifyLater [private] |
Definition at line 152 of file composite.h.
The documentation for this class was generated from the following files: