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16 Cards in this Set
- Front
- Back
3d modelling |
the process of creating a geometric representation of a 3d object |
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3 modelling workflow |
-planning -modeling -materials -lighting -animation -rendering |
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modelling techniques
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polygon non-uniform rational b-spline |
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polygon modelling |
process of creating a 3d model by defining and manipulating polygons directly manipulating it's edges vertices and faces |
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sub division |
allows more control of objects |
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multiple primatives |
union: OR (combining) |
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advantages
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easy to understand; precision; large tool library graphics hardware only renders polygons |
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disadvantages; |
hard to make smooth surfaces |
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NURBS |
creating a 3d model using Bézier curves; you define a smooth curve which defines form of polygon |
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NURBS surfaces |
comprised of surfaces interpolated between a set of bézier curves which are defined by modeller |
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bezier curves |
defined by control points, which together make a control polygon |
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revolve |
creates a surface by revolving a profile curve round a pivot point |
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loft |
creates surface between a series of profile curves |
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extrude |
creates surface by extruding a profile defined by a curve, alone a path by another curve |
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NURBS Modeling advantages |
allows created of smooth curved surfaces
great for organic surfaces or industrial desings |
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NURBS disadvantages |
more complicated need to be converted to polys before they can be rendered by most graphics cards |