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.TH Geometry 3 "2002-11-19" "perl v5.8.0" "User Contributed Perl Documentation"
Math::Geometry \- Geometry related functions
\& @N =triangle_normal(@P1,@P2,@P3);
\& @ZP=zplane_project(@P1,$d);
This is about to get a massive overhaul, but first im adding tests,
lots of lovely lovely tests.
Currently for zplane_project onto a plane with normal of the z axis and z=0,
the function returns the orthographic projections as opposed to a perspective
projection. I'm currently looking into how to properly handle z=0 and will
This package implements classic geometry methods. It should be considered alpha
software and any feedback at all is greatly appreciated. The following methods
.IX Subsection "vector_product."
Also known as the cross product, given two vectors in Geometry space, the
vector_product of the two vectors, is a vector which is perpendicular
to the plane of \s-1AB\s0 with length equal to the length of A multiplied
by the length of B, multiplied by the sin of @, where @ is the angle
.IX Subsection "triangle_normal"
Given a triangle \s-1ABC\s0 that defines a plane P. This function will return
a vector N, which is a normal to the plane P.
\& triangle_normal(($Ax,$Ay,$Az),($Bx,$By,$Bz),($Cx,$Cy,$Cz));
.IX Subsection "zplane_project"
Project a point in Geometry space onto a plane with the z\-axis as the normal,
at a distance d from z=0.
\& ($x2,$y2,$z2) = zplane_project ($x1,$y1,$z1,$d);
Rotate about the x axis r radians.
\& ($x2,$y2,$z2) = rotx ($x1,$y1,$z1,$r);
Rotate about the y axis r radians.
\& ($x2,$y2,$z2) = roty ($x1,$y1,$z1,$r);
Rotate about the z axis r radians.
\& ($x2,$y2,$z2) = rotz ($x1,$y1,$z1,$r);
Convert degree's to radians.
Convert radians to degree's.
Returns an approximate value of Pi, the code has been cribed from Pg146, Programming Perl
\& Greg McCarroll <greg@mccarroll.demon.co.uk>
projects / OpenSPARC-T2-DV / blob