[csu540-f05-rpf] SP2: Building a fancy 3D model

[Robert Futrelle]

Early info on SP2 for
CSU540 - Computer Graphics
Prof. Futrelle
Fall 2005
November 7th note.

FANCY MODELS

Desired scene:

Room with walls, coffee table, vase
(flowers are extra, extra credit)

Vase created by finding and measuring a real vase
(or bottle, vase preferred).

Create the table using rectangles.
Each rect is two triangles in the same plane.
Table top is a rectangular solid as are the legs.
(cylindrical legs, extra credit, rounded table
top corners, extra, extra credit.)

Each  rectangular wall is just two large triangles.

The vase is created by "sweeping" - rotating
a 2D contour, made up of straight line segments,
around a single axis.  When a line segment
with neither endpoint on the rotation axis
is rotated, it defines a rectangle. The rectangle
should be represented as two triangles.

If one point is on the rotation axis, the sweep
generates triangles.

The initial sweep segment, made up of a set of
triangles is copied, then swept through an
angle k x 2pi/n for k = 1 to n-1, each k with
a new copy of the original. Similar to how you did
your cones.

Take a can, bottle, or vase with a light colored
surface and draw on it to get an idea of the
structures you'll create.

I'll be out of town and mostly out of touch, til Sunday
so I just wanted to get this note out to you so
you could start measuring, experimenting, and
creating those rectangles.

Should be a great looking scene.

SP3 will add antialising and shadows and a more
elaborate model.

Remember, there is a class Wednesday, should be fun.
No class Thursday, so have a good weekend.
See you next Monday.

  -- Prof. Futrelle