Visibility and Hidden Surface Removal
Visibility and Hidden Surface Removal
Visibility and Hidden Surface Removal
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List Priority (7)<br />
• Five tests for visibility:<br />
– 1. do x-extents not overlap?<br />
– 2. do y-extents not overlap?<br />
– 3. is P entirely on the opposite side of Q's plane,<br />
from the viewpoint?<br />
– 4. is Q entirely on the same side of P's plane,<br />
from the viewpoint?<br />
– 5. do the projections of polygons onto the xy<br />
plane not overlap?<br />
© Machiraju/Zhang/Möller<br />
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