Картки "3D Modeling" | Quizlet

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Instance

a replica (duplicate) of a shape. If the original shape is modified (changed) all of the instances are automatically updated too. Saves memory.

wireframe

a way to view your model that does not show surfaces (shading)...just edges of polygons that make up the object

Boolean

objects can be added or subtracted from each other to create new shapes

Isoparms

help define the detail of nurbs. Similar to adding segments to primitive objects to smooth them

flat shading

simply coloring an object

Phong shading

gives objects a smooth appearance (anti-aliasing). A Phong tag is automatically added to every object you create

FFD (Free Form Deformation)

control points that allow you to do a manual deformation to reshape

Polygon

flat surface made of 3 or more sides

N-Gon

polygon that has more than 4 corner points

Normals

show which polygons face inside and which polygons face outside

Orthographic view

2D view of an object (front, right and top view)

Perspective view

3D view of an object

Polygonal mesh

Editable object made of points, edges, and polygons

Origin

The rotation point (X, Y, Z) of a scene or object

Cartesian Coordinates System

Describes the location of objects in 3D space

Axis which describes "depth"

Z

Axis which describes "width"

X

Axis which describes "height"

Y

"H" rotation coordinate tells which direction

left and right

"P" rotation coordinate tells which direction

forward and backward

"B" rotation coordinate tells which direction

side to side

Hierarchy

Controls how 3D objects and commands interact with each other

Aspect ratio

Proportions that describe width to height of various TV screens. In 3D it is known as "scaling".

Vertices

Points on a geometric shape that define edges of polygons

Lathe Nurb

Rotates a spline object around an axis

Extrude Nurb

Gives thickness to a spline

Loft Nurb

Attaches a skin over two or more splines. Also called "skinning"

Sweep Nurb

A closed spline that follows a line or curve creating a solid shape