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

double * QDot, double * SDot, const double * MDotDot=NULL,
double * omegaDot=NULL, double * QDotDot = NULL)
Takes as input matrices M, Q, S (such that M = QS is the polar decomposition), 3 × 3 derivative of M
MDot, and optionally the 3 × 3 second derivative MDotDot. Calculates 3 × 3 derivatives QDot and SDot, and
3-vector of rotational velocity omega, along with second derivatives QDotDot and omegaDot if MDotDot is
provided and the output pointers are not NULL. Again, all matrices are stored as row-major arrays, and all
non-optional output matrix arrays must be pre-allocated.
2.20 sceneObject
Allows for easy rendering of .obj meshes, either in their original state or under user-specified deformations.
File-loading and mesh-rendering functionality is provided by the obj library. All indices taken or returned
by the classes below are zero-indexed.
class SceneObject Stores the model from an .obj file and provides tools to render the entire model or
its constituent features.
SceneObject(char * filename)
Constructs the object from the .obj file at filename. Calls exit upon failure.
virtual void Render()
Renders the entire model with an ObjMeshRender object.
virtual void RenderVertices()
virtual void RenderEdges()
virtual void RenderNormals()
Render the specified components of the model using ObjMeshRender.
virtual void RenderVertex(int vertex)
Renders the vertex at index vertex in the mesh.
void HighlightVertex(int i)
Renders vertex i with a large green dot.
void BuildDisplayList()
Builds a display list for the model to speed up rendering. If a list has been built, it is automatically used
by the Render function above.
void PurgeDisplayList()
Deletes the display list, if there currently is one.
ObjMesh * GetMesh()
Returns a pointer to the underlying ObjMesh object from the obj library, for more direct access to the
mesh.
void ComputeMeshRadius(Vec3d & centroid, double * radius)
Writes to *radius the smallest radius of a sphere centered at centroid that contains the entire mesh.
void ComputeMeshGeometricParameters(Vec3d * centroid, double * radius)
Writes the coordinates of the center of the mesh (the average of its vertices) to *centroid, and the
smallest radius of a sphere around this center which contains the entire mesh to *radius.
void ExportMeshGeometry(int * numVertices, double ** vertices,
int * numTriangles, int ** triangles)
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