50 lines
1.7 KiB
Matlab
50 lines
1.7 KiB
Matlab
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% GTSAM Copyright 2010, Georgia Tech Research Corporation,
|
|
% Atlanta, Georgia 30332-0415
|
|
% All Rights Reserved
|
|
% Authors: Frank Dellaert, et al. (see THANKS for the full author list)
|
|
%
|
|
% See LICENSE for the license information
|
|
%
|
|
% @brief Read graph from file and perform GraphSLAM
|
|
% @author Frank Dellaert
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
|
%% Create a hexagon of poses
|
|
hexagon = pose3SLAMValues_Circle(6,1.0);
|
|
p0 = hexagon.pose(0);
|
|
p1 = hexagon.pose(1);
|
|
|
|
%% create a Pose graph with one equality constraint and one measurement
|
|
fg = pose3SLAMGraph;
|
|
fg.addHardConstraint(0, p0);
|
|
delta = p0.between(p1);
|
|
covariance = gtsamSharedNoiseModel_Sigmas([0.05; 0.05; 0.05; 5*pi/180; 5*pi/180; 5*pi/180]);
|
|
fg.addConstraint(0,1, delta, covariance);
|
|
fg.addConstraint(1,2, delta, covariance);
|
|
fg.addConstraint(2,3, delta, covariance);
|
|
fg.addConstraint(3,4, delta, covariance);
|
|
fg.addConstraint(4,5, delta, covariance);
|
|
fg.addConstraint(5,0, delta, covariance);
|
|
|
|
%% Create initial config
|
|
initial = pose3SLAMValues;
|
|
s = 0.10;
|
|
initial.insertPose(0, p0);
|
|
initial.insertPose(1, hexagon.pose(1).retract(s*randn(6,1)));
|
|
initial.insertPose(2, hexagon.pose(2).retract(s*randn(6,1)));
|
|
initial.insertPose(3, hexagon.pose(3).retract(s*randn(6,1)));
|
|
initial.insertPose(4, hexagon.pose(4).retract(s*randn(6,1)));
|
|
initial.insertPose(5, hexagon.pose(5).retract(s*randn(6,1)));
|
|
|
|
%% Plot Initial Estimate
|
|
figure(1);clf
|
|
plot3(initial.xs(),initial.ys(),initial.zs(),'g-*');
|
|
|
|
%% optimize
|
|
result = fg.optimize(initial);
|
|
|
|
%% Show Result
|
|
hold on; plot3DTrajectory(result,'b-*', true, 0.3); axis equal;
|
|
result.print(sprintf('\nFinal result:\n'));
|