97f515985d
git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@2 fdac6126-5c0c-442c-9429-916003d36597
47 lines
816 B
Matlab
47 lines
816 B
Matlab
# angle in degrees [0,60]
|
|
# [replace :angle: with a value between 0 and 60]
|
|
alpha_d = :angle:;
|
|
|
|
# compute roundness of first case
|
|
|
|
alpha = pi * alpha_d/180;
|
|
|
|
A = [ 0 0 0 ]';
|
|
B = [ 2*cos(alpha) 0 0 ]';
|
|
C = [ cos(alpha) sin(alpha) 0 ]';
|
|
|
|
#
|
|
vecAC=C-A;
|
|
vecAB=B-A;
|
|
|
|
aa = norm(B-C)^2;
|
|
bb = norm(vecAC)^2;
|
|
cc = norm(vecAB)^2;
|
|
AA = norm(cross(vecAC,vecAB))^2;
|
|
|
|
nom = AA * min( aa, min(bb,cc) );
|
|
denom = aa * bb * cc;
|
|
nR1 = sqrt(4.0/3.0) * sqrt(nom/denom)
|
|
|
|
# compute roundness of 2nd case
|
|
|
|
alpha = pi * ((180-alpha_d)/2)/180;
|
|
|
|
A = [ 0 0 0 ]';
|
|
B = [ 2*cos(alpha) 0 0 ]';
|
|
C = [ cos(alpha) sin(alpha) 0 ]';
|
|
|
|
#
|
|
vecAC=C-A;
|
|
vecAB=B-A;
|
|
|
|
aa = norm(B-C)^2;
|
|
bb = norm(vecAC)^2;
|
|
cc = norm(vecAB)^2;
|
|
AA = norm(cross(vecAC,vecAB))^2;
|
|
|
|
nom = AA * min( aa, min(bb,cc) );
|
|
denom = aa * bb * cc;
|
|
nR2 = sqrt(4.0/3.0) * sqrt(nom/denom)
|
|
|