fb16dfecae
Commit b7f05445c0 has added WWW entries to port Makefiles based on
WWW: lines in pkg-descr files.
This commit removes the WWW: lines of moved-over URLs from these
pkg-descr files.
Approved by: portmgr (tcberner)
16 lines
1,017 B
Text
16 lines
1,017 B
Text
Geometer is a geometry library for Python 3 that uses projective geometry and
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numpy for fast geometric computation. In projective geometry every point in 2D
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is represented by a three-dimensional vector and every point in 3D is
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represented by a four-dimensional vector. This has the following advantages:
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There are points at infinity that can be treated just like normal points.
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- Projective transformations are described by matrices but they can also
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represent affine transformations i.e. also translations.
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- Every two lines have a unique point of intersection if they lie in the same
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plane. Parallel lines have a point of intersection at infinity.
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- Points of intersection, planes or lines through given points can be calculated
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using simple cross products or tensor diagrams.
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- Special complex points at infinity and cross ratios can be used to calculate
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angles and to construct perpendicular geometric structures.
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- Most of the computation in the library done via tensor diagrams (using
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numpy.einsum).
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