Math::GMatrix - Extension of Math::Matrix for (2D graphics-)vector manipulation
The following methods are available:
Constructor arguments are a list of references to arrays of the same length. The arrays are copied. The method returns undef in case of error.
$a = new Math::Matrix ([rand,rand,rand], [rand,rand,rand], [rand,rand,rand]);
As s special case you can pass a single argument 'I' for getting an identity matrix.
If you call
new as method, a zero filled matrix with identical deminsions is returned.
You can transform one or more vectors by calling:
@V1=(1.5,3.7); @V2 = $M->xform(@V1); @L1=( [1.5,3.7], [4.6,6.8], [5.1,-0.7] ); @L2 = $M->xform(@L1);
You can pan (move by x and y offset) your graphics by calling:
$M2 = $M->translate(2.5,10.2);
You can rotate your graphics by calling:
$M2 = $M->rotate(-90);
You can scale (factor_x and factor_y) your graphics by calling:
$M2 = $M->rotate(2,2);
@ListOfVectors = [ [0,1], [3,5], [2,7], [8,-1], ]; $paperwidth = 21; # DIN A4 is 21x29.7 cm $M = new Math::Matrix('I'); # get an identity matrix $M = $M->translate(-1,-1)->rotate(90)->translate($paperwidth-1,1); @Result = $M->xform(@ListOfVectors);
A. Cester, <email@example.com>