4.2. Glue Code

The OpenFAST glue code is the layer of software that initializes each physics module, manages the flow of data between them, orchestrates the time-stepping loop, and—optionally—linearizes the assembled system. This section documents the glue code from a user and module-developer perspective.

• 4.2.1. Glue Code Overview
  • 4.2.1.1. Source files
  • 4.2.1.2. Module coupling categories
  • 4.2.1.3. Time-stepping loop (overview)
• 4.2.2. Module Variables (ModVar)
  • 4.2.2.1. Data structures
  • 4.2.2.2. Variable flags (VF_*)
  • 4.2.2.3. Field types (Field*)
  • 4.2.2.4. Adding module variables
  • 4.2.2.5. Perturbation values
  • 4.2.2.6. Orientation representation
• 4.2.3. ModGlue – Combining Modules into Global Arrays
  • 4.2.3.1. The ModGlueType structure
  • 4.2.3.2. The iLoc index range
  • 4.2.3.3. What ModGlue_CombineModules does
  • 4.2.3.4. Where ModGlue_CombineModules is called
  • 4.2.3.5. How the global index enables matrix assembly
• 4.2.4. Solver
  • 4.2.4.1. User input parameters
  • 4.2.4.2. Generalized-alpha integration
  • 4.2.4.3. Module ordering
  • 4.2.4.4. Jacobian construction
  • 4.2.4.5. Output channels from the solver
• 4.2.5. Linearization
  • 4.2.5.1. User inputs for linearization
  • 4.2.5.2. Module support for linearization
  • 4.2.5.3. Variable selection
  • 4.2.5.4. Steady-state trimming (CalcSteady)
  • 4.2.5.5. linearization at an operating point
  • 4.2.5.6. Output file format
  • 4.2.5.7. Variable naming conventions
  • 4.2.5.8. Module developer responsibilities