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Results tagged with projections
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user 209
Questions about the conversions of a 3D model to a 2D model.
20
votes
Accepted
Does a sphere projected into 2D space always result in an ellipse?
Assuming a perspective projection and a view point external to the sphere, then the 'boundary' formed by the view point and the circle on the sphere which forms the horizon WRT the view point, will be …
- 4,336
15
votes
Why do GPUs divide clip space Z by W, for position?
If you are doing a perspective image and your model has implicit intersections then, if you use "linear Z", those intersections will appear in the wrong places.
For example, consider a simple ground …
- 4,336
1
vote
Projective texturing from many images
Apologies in advance for the poor quality of this answer, but this sounds a little like what an ex-colleague was doing as part of his PhD. The "Free-Viewpoint video" papers listed at the bottom of htt …
- 4,336
1
vote
mapping of a point from a sphere into UV plane
IIRC this and some other texture mapping/projection techniques are discussed in Watt & Watt's Advanced Animation and Rendering Techniques
Skip forward to around page 180. FWIW that has a reference to …
- 4,336