Chapter 4 H/W

23 02 2009

1.  False

2

a) A bounding box can represent an ellipse because four points on the perimeter of the ellipse can touch four points on the perimeter of a rectangle without intersecting it.

b) No. A Bezier curve’s points are too varied to bound within a box and also cannot be accurately plot.

3. P5 would then be in between P3 and P4 and the line would extend past the points of P6.

4.

5. By using layers one could have different arrangements of color shading then arrange them in an order the user could see them all.

6.

7.

8. The only circumstance you would not use ray tracing to render a 3D scene would be one where there is no or little significant light source or a mirrored image due to the fact that the objects would be treated differently with the light in tracing than with the light as a mirror reflection.

 

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