Practical Algorithms for 3D Computer Graphics, 2nd Edition

142 4. Basic visualization

Wrap the

reflection

map round

the sphere

^

View

projection

plane

Viewpoint

d

p

n

z

x

Figure 4.33: A r efl ec t io n map can be thought of as an image painted on the inside of

hollow spher e with the reflective model placed at its center.

Figure 4.34: Final image of models first show n in figu r e 4.3 now using a pseudo shadow,

procedural texture and reflection map.

in figur e 4.35(a). Ren d er in g two adjacent pixels near the bottom of the image

where the viewing vector intersects the floor close to the camera will most likely

result in a texture look-up that results in the same color value bein g obtained.

Rendering two adjacent pixels near