Vega FEM Library (v1.1) User's Manual - University of Southern ...

2.1 camera
class SphericalCamera Provides utilities for setting the OpenGL camera based upon a spherical-coordinate
system centered at a specified focus point.
void Look()
Applies the current camera transformation to the active OpenGL matrix. Note that this does not run
glMatrixMode or glLoadIdentity.
void MoveRight(double amount)
void MoveUp(double amount)
void MoveIn(double amount)
void ZoomIn(double amount)
Move the camera by a user-specified offset. Supply negative values to move/zoom in the opposite direction.
void SavePosition(char * filename)
void LoadPosition(char * filename)
Save or load the camera position to a file. LoadPosition prints a warning if the specified file does not
exist.
2.2 configFile
class ConfigFile Parses values from a text configuration file. The syntax of the configuration file is userdefined.
Options can be read as int, bool, float, double, and char * (C-string) types. See any of the
.config files in the examples folder for an example of the config file syntax.
int addOption(char * optionName, T * destLocation)
Defined for T as int, bool, float, double, char. Adds a mandatory option with name optionName.
When the config file is later parsed, any value found for this option is written to the variable pointed to by
destLocation. If no value for this option is found, the parse is considered to have failed. Returns a non-zero
value if the option has already been defined.
int addOptionOptional(char * optionName, T * destLocation, T defaultvalue)
int addOptionOptional(char * optionName, char * destLocation, char * defaultvalue)
Adds an optional option with name optionName. When the config file is later parsed, the variable pointed
to by destLocation is set to the value found in the file, or to defaultValue if no value is set. Returns a
non-zero value if the option has already been defined.
int parseOptions(char * filename)
Parses the options in file filename, writing the option values it reads to the appropriate variables. A
non-zero value is returned if any mandatory options are not specified.
2.3 corotationalLinearFEM
class CorotationalLinearFEM Implements the corotational linear finite element model described in [MG04].
The class can also compute the exact tangent stiffness matrix; the implementation is described in [Bar12].
CorotationalLinearFEM(TetMesh * tetMesh)
Initializes the model based upon an input tetrahedral mesh.
void GetStiffnessMatrixTopology(SparseMatrix ** stiffnessMatrixTopology)
Writes to *stiffnessMatrixTopology a newly allocated (using new) zero matrix containing the pattern
of non-zero entries of the stiffness matrix.
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