Re: Can POV transform a cylinder into a cone?

Wasn't it Joe Strout who wrote:
How can I transform a cube into a truncated pyramid, or a cylinder into
a truncated cone, in POV-Ray?

It seems like the Matrix transform can't do this, because it doesn't
take a full 4x4 matrix, but only a 3x4 one -- this represents only
linear transformations and translation.

Is there some other trick that will let me shrink the top of an object
while expanding the bottom?

Not with CSG objects, but you can apply non-linear transformations to
cubes and cylinders that are made from isosurfaces. Something like this
http://www.econym.demon.co.uk/isotut/substitute.htm#nls

--
Mike Williams
Gentleman of Leisure
.

Relevant Pages

  • The 1905 SR Paper with Commentary and Corrections (was: physics formulary)
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  • Re: An uncountable countable set
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  • Re: transformations
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  • Re: transformations
    ... these are linear transformations represented by matrixes ... a "rig" is a domain of quantities ... cost of getting from y to z over time interval t2", ...
    (sci.math)
  • Re: affine transformation question-
    ... transformation and preservers ortientation then det>0. ... In every group G of linear transformations of a real finite-dimensional vector space V onto itself that contains transformation with negative determinant, we have an invariant subgroup G+ of index 2 consisting of all transformations in G with positive determinant. ...
    (sci.math)