-
Notifications
You must be signed in to change notification settings - Fork 1
/
compute_intersection_points.m
60 lines (47 loc) · 2 KB
/
compute_intersection_points.m
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
% [intersection_points] = compute_intersection_points(b_input, aux_data, reality_string)
%
%
% copyright 2016 Daniel Brake
% University of Notre Dame
% Applied and Computational Mathematics and Statistics
%
% Bertini (TM) is a registered trademark.
%
% This file is part of Bertini_tropical.
%
% Bertini_tropical is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% Bertini_tropical is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program. If not, see <http://www.gnu.org/licenses/>.
function [intersection_points] = compute_intersection_points(b_input, aux_data, reality_string)
if exist('previous_intersection_points.mat','file')
load('previous_intersection_points.mat');
if issame_system(previous_b_input,b_input)
display('reusing previous intersection points');
intersection_points = previous_intersection_points;
return;
end
end
system_variables = b_input.variable_group;
num_vars = numel(system_variables);
% for each variable, compute the intersection points with the corresponding axis.
intersection_points = [];
for kk = 1:num_vars
display(sprintf('slicing %s=0',system_variables{kk}));
local_intersection_points = coordinate_slice(b_input, aux_data.initial_start_points, aux_data.random_line_coefficients, 0, kk, reality_string);
intersection_points = [intersection_points local_intersection_points];
end
saveme.previous_intersection_points = intersection_points;
saveme.previous_b_input = b_input; %#ok
save('previous_intersection_points.mat','-struct','saveme')
clear saveme
end