Term

Definition
simple, easy to learn, flexible to build any kind of shape 


Term

Definition
One normal per face leads to shading problems, easy to construct illegal geometry, can only do curves with huge number of polygons with soft edges. 


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Definition
construct curved surfaces efficiently that render correctly, render with good results and efficiently, built in UV texture coordinates. 


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Definition
Abstract, difficult to do a complex shape, need multiple shapes that can break apart. 


Term

Definition
Vertices, Edges, Faces, Shells, Meshes, Normals, UVs 


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Definition
CVs, Hull, Curve Point, IsoParm, Trimmed Edge 


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Definition
Vertices, Edges, Faces, Creased Edge 


Term

Definition
Extrude, Split Polygon, Insert Edge Loop, Append, Fill Hole 


Term

Definition
Loft, Extrude, Boundary, Revolve, Detach, Attach 


Term

Definition
Ngon, Triangle, Quads, Hidden, NonManifold 


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Definition
Hard, Soft, Creased, Boundary, Shared 


Term

Definition
Winged, Pole, Star, Butterfly 


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Definition
Ngon, Bowtie, TFormation, Winged Vertice, Lamina Face 


Term
Other Problems with Geometry: 

Definition
Internal or Hidden Faces, NonExtruded Faces, Flipped Normals 


Term

Definition
How shape components are arranged to form the structure of a shape. 


Term

Definition
Refers to loops following the form of muscle and other parts of the character's anatomy(Loop Modeling). 


Term

Definition
Set of edges aligned end to end to form one line that travels along the surface of an object. 


Term
Loop Model Anomaly: Poles 

Definition
Vertices that have three edges, like the corner of a box. 


Term
Loop Model Anomaly: Stars 

Definition
vertices that have more than 4 connecting edges. (6 or more should be avoided) 


Term
NonManifold Polygon Geometry: Tshape 

Definition
A corner of one polygon connects in the middle on a side of another or when three faces share an edge. 


Term
NonManifold Polygon Geometry: Reversed Normals 

Definition
Occur when the normals of two adjoining faces don't face the same direction. The normals are essential to determine how an object should be shaded. Makes soft edges impossible. 


Term
NonManifold Polygon Geometry: BowTie 

Definition
Occur when two polygons share a vertex but not an edge. 


Term
NonManifold Polygon Geometry: Lamina Face 

Definition
Are a pair of faces that share the same vertices and edges. Usually occur when using duplicate face incorrectly. 


Term
NonManifold Polygon Geometry: 3 other bad geometry 

Definition
five or more sided polygons polygons that share vertices but not edges polygons of a mesh that don't share any components 


Term

Definition
Vertices, edges, faces, meshes, shell, UV's, normal 


Term

Definition
Polygon and Subdivided Surface Points 


Term

Definition
Polygon and Subdivided Surface sides/ Subdivided Surface Edges can also be creased. 


Term

Definition
Individual Polygon and Subdivided Surface Polygons 


Term

Definition
A group of polygons that form a shape by sharing edges and vertices. 


Term

Definition
A group of faces within a mesh that share a group of UV coordinates. A mesh has at least one shell but can have more. 


Term

Definition
a 2D position of a 3D point on a shape(Used for texture mapping). U= width or horizontal component. V= height or vertical component. 


Term

Definition
The direction that a point on a shape is facing. Polygons have only one normal per face. 


Term
Parts of a basic NURB surface: 

Definition
Spline, Control Vertex(CV), Isoparametric Curves(Isoparms), Patches and Hull. 


Term

Definition
Curved line made up of segments and defined by control vertices(CV's). 


Term

Definition
A point that controls the shape of a NURBS curve or surface at a particular point. CV's can be thought of as invisible magnets that pull a curve or surface towards them. 


Term

Definition
are lines running along the surface of a NURBS object in the U and V directions, showing the shape of the surface as defined by the CVs. 


Term

Definition
The area enclosed by four adjacent isoparms. Can also refer to the whole NURBS surface. 


Term

Definition
A line that connects CVs. It can be displayed to aid in modeling but is not required to edit a Nurb surface. 


Term

Definition
developed to take advantage of the best of polygons and NURBS surfaces. Is basically a polygon mesh that is automatically smoothed like a NURB surface. Maya can have up to 6 levels of detail but more than three are rarely needed. 


Term

Definition
refers to the types of shapes you can create. 


Term
3 most common types of Geometry: 

Definition
Polygons, NURBS and Subdivided Surfaces 


Term

Definition
NonUniform Rational BSpline 


Term

Definition
process in which a Nurb surface is eventually converted into polygons during Display or Rendering but the computer automatically determines how many polygons are needed to generate a smooth surface. 


Term
How do you close a gap between two NURBS? 

Definition
Use Attach or Fillet. Attach will snap them together while Fillet will add extra geometry that ties them together. 


Term
What's the process of creating a NURB trimmed surface? 

Definition
project curve onto a surface. Selecting geometry outside of projection will delete projection shape(AKA only selection will not be removed). 


Term

Definition
loops traveling along the shape representing the details of the structure underneath. In characters, flow will often change direction or switch from linear to radial. 


Term
What do Grid Flow and Good Topology mean? 

Definition
It means your grid and shape components are arranged to successfully represent the form and flow of your model. 


Term
What is Stitching with NURBS? 

Definition
connecting a network of patches into an organic shape but using the stitch function. 

