Computer Graphics Part 2 (Object Representations)

• 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)

• Parametric surfaces
• Metaballs
• Mesh structures (Polygon format, triangle strip, triangle fans; Quad mesh)

• 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)

Difficult to render objects that have a dynamically changing topology, i.e. blobby objects like liquid, clay etc.