•Primitive shapes (primitives) are manipulated with geometric transformations
(translation, rotation, scale). These
transformations are essential
for model composition, the process of hierarchically composing complex objects from simpler components.
•Hierarchical models and the same geometric
transformations are also essential
for animation.
•Once object’s geometry is established, must be viewed on
a screen. Must specify the
“camera’s” PoV and map from 3D to 2D for viewing (and from 2D to 3D for 2D input devices (e.g., the mouse or
pen/stylus)).
•In the process of mapping from 3D to 2D, object
(surface) material properties
and lighting effects are used in rendering one’s constructions. The rendering process is also called image synthesis.
From Geometry to Image
