SM2231::3D Animation I Basics Polygonal Modeling

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SM2231::3D Animation I Basics Polygonal Modeling Types of surfaces in Computer Graphics • Polygonal Mesh • Non-Uniform Rational B-Spline (NURBS) • Subdivision Surface (Subdiv) Polygon Spheres NURBS Sphere Polygon Primitives Polygon Primitive - Sphere Polygon Primitive - Cone Polygon Primitive - Cube What makes up an object? Transform Shape History Creating a Polygonal Chair Start with a primitive Adjust the edges Extrude out the 4 legs Then extrude the backrest Delete these two faces Prepare to make the panel of the backrest Use the “Append Polygon” tool to fill in new polygonal faces Rotate the backrest slightly backward Select all the convex and concave edges Apply Bevel to these edges Bevel makes the edges more rounded and realistic Another way to model Note that I am keeping all the faces 4 sided Extrude the faces out two times Shape the faces, edges and vertices to the desired shape Polygonal Smoothing Construction History Every action is recorded as part of the construction history. Keeping history will occupy more memory, result in large files, and slow down the interaction. Construction History Delete the history when they are no longer needed Tris, Quads, N-gons Keep the faces as 4 sides polygons (Quads) Triangles are ok E.g. Smoothing N-gons can result in unpredictable topology But anything more than 4 sides (N-gons) can cause undesirable artefacts Maya Project Before you create anything, set up a Maya Project first A Maya Project A Maya project folder contains a number of subfolders A Maya Project Maya looks for texture files here A Maya Project Maya render images here A Maya Project Maya looks for other .ma or .mb scene files that are “referenced” by the current scene file A Maya Project It is IMPORTANT to set up a Maya project folder when you start a new project.

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