TrueGrid® can use existing geometry from solids modelers and CAD/CAM systems via the IGES format, polygonal data, or scattered data. TrueGrid® also has an extensive geometry engine. The geometry from these different sources can be mixed in any way to form the required geometric model. This is remarkable when you consider that a smooth trimmed NURBS surface from a solids modeler can be combined with a non-smooth polygonal surface, for example, to form a single composite surface. What is even more remarkable is that a face of the mesh can be projected onto this composite surface and smoothed using one of the elliptic smoothers such that the transition in the mesh from the one surface to the other will not be noticeable.

TrueGrid®'s Geometry Library include:

(*) 3D Lines, polygonal curves, and arcs.
(*) 3D cubic spline and NURBS curves.
(*) 3D Curves as best fits to scattered data.
(*) 3D Curves by algebraic functions.
(*) Curves projected onto surfaces.
(*) Surface edges and contours.
(*) Concatenation of any set of 3D curves.
(*) Surface intersections.
(*) Ruled, swept, and pipe surfaces.
(*) Surfaces blended from 3 or 4 curves.
(*) Cubic spline and NURBS surfaces.
(*) Mesh and polygon surfaces.
(*) Planes, spheres, cylinders, cones, and tori.
(*) Surfaces by algebraic functions.
(*) Surfaces as best fits to scattered data.
(*) General transformations applied to the geometry.
(*) Combination of surfaces to form composites.

Complex geometry composed of multiple surfaces

TrueGrid® rapidly matches block-structured meshes to bounding surfaces regardless of the way the surfaces are defined. Its meshing capabilities work equally well on overlapping surfaces, surfaces that don't meet, and surfaces that don't meet smoothly. You can combine any number of complex surfaces into a single entity. This frees you to build and modify geometric components without considering how the mesh will be built.

Geometric Features That Reduce Complexity

(*) Decompose problems into manageable parts.
(*) Decompose a part into multiple blocks resembling the part.
(*) Parts built in Cartesian or cylindrical coordinates.
(*) Attach the mesh to any geometry using the projection method.
(*) Combine any number and any type of curves.
(*) Combine any number and any type of surfaces.
(*) Intersect surfaces automatically.
(*) Interfaces created only once.
(*) Block interfaces automatically merge together.
(*) All block edges and faces assigned default shapes.
(*) Edges become 3D cubic splines with vertices as control points.
(*) 3D graphics to inspect the mesh at any stage.

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