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What is the problem in CG object representation?
What is the demand/need?
 Real world is continuous and infinte
 Computers represent things desicretely and resources are finite
 need compact object representations that allows > 1. quick loading 2. quick rendering
 (Demand for continuous smooth surfaces that are easy to control)

Object representation approaches (list all 3)
 Parametric surfaces
 Metaballs
 Mesh structures (Polygon format, triangle strip, triangle fans; Quad mesh)

Disadvantages (2) of increasing the degree of a parametric curve / explain alternative way/solution?
 1. Not easy to control
 2. Requires more computation
solution: concatenate, which means subdividing curves into sections (each of which has its own low order/degree parametric equation)

Problem with parametric curves?
Difficult to render objects that have a dynamically changing topology, i.e. blobby objects like liquid, clay etc.

