MAN page from Old RedHat 6.X perl-Math-Geometry-0.02-7.i386.rpm

Geometry

Section: User Contributed Perl Documentation (3)
Updated: perl 5.005, patch 03
Index

NAME

Math::Geometry - Geometry related functions

SYNOPSIS

        use Math::Geometry;

        @P2=rotx(@P1,$angle);        @P3=rotx(@P1,$angle);        @N =triangle_normal(@P1,@P2,@P3);        @ZP=zplane_project(@P1,$d);

NOTES

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 update it shortly.

DESCRIPTION

This package implements classic geometry methods. It should be considered alpha software and any feedback at all is greatly appreciated. The following methods are available:

vector_product.

Also known as the cross product, given two vectors in Geometry space, thevector_product of the two vectors, is a vector which is perpendicularto the plane of AB with length equal to the length of A multipliedby the length of B, multiplied by the sin of @, where @ is the anglebetween the two vectors.

triangle_normal

Given a triangle ABC that defines a plane P. This function will returna vector N, which is a normal to the plane P.

    ($Nx,$Ny,$Nz) =       triangle_normal(($Ax,$Ay,$Az),($Bx,$By,$Bz),($Cx,$Cy,$Cz));

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);

rotx

Rotate about the x axis r radians.

($x2,$y2,$z2) = rotx ($x1,$y1,$z1,$r);

roty

Rotate about the y axis r radians.

($x2,$y2,$z2) = roty ($x1,$y1,$z1,$r);

rotz

Rotate about the z axis r radians.

($x2,$y2,$z2) = rotz ($x1,$y1,$z1,$r);

deg2rad

Convert degree's to radians.

rad2deg

Convert radians to degree's.

pi

Returns an approximate value of Pi, the code has been cribed from Pg146, Programming Perl 2nd Ed.

EXAMPLE

    use Math::Geometry;

AUTHOR

    Greg McCarroll <gregAATTmccarroll.demon.co.uk>

This document was created byman2html,using the manual pages.