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mGP_coverage.m
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mGP_coverage.m
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% a planning example
close all
clear all
clear
clc
root_folder = pwd;
% Random number generator
% matlab_parameters.seed_num = 3;
% rng(matlab_parameters.seed_num, 'twister');
%% Environment
model_name = 'cylinder';
model.name = model_name;
% mesh
data_mesh = load([model_name, '_mesh.mat']);
model.TR = data_mesh.TR;
model.valid_faces = data_mesh.valid_faces;
TR = data_mesh.TR;
% occupancy
data_occupancy = load([model_name, '_map_occupancy']);
model.occupancy = data_occupancy.occupancy;
% esdf
data_esdf = load([model_name, '_map_esdf']);
model.esdf = data_esdf.esdf;
% true temperature field
data_temperature_field = load([model_name, '_temperature_field']);
model.temperature_field = data_temperature_field.F_value;
%% Parameters
[map_parameters, sensor_parameters, planning_parameters, optimization_parameters, ...
matlab_parameters] = load_parameteres(model);
%% Ground truth and initial map
ground_truth_faces_map = create_ground_truth_map(map_parameters);
faces_map = create_initial_map(map_parameters);
P_prior = diag(faces_map.P);
dim_xyz_plot = [-9 9 -9 9 0 25];
if (matlab_parameters.visualize_map)
figure;
subplot(2, 4, 1)
hold on;
axis(dim_xyz_plot);
xlabel('x [m]');
ylabel('y [m]');
zlabel('z [m]');
title('Ground truth map')
daspect([1 1 1]);
view(3);
trisurf(TR.ConnectivityList, TR.Points(:,1), TR.Points(:,2), ...
TR.Points(:,3), ground_truth_faces_map, 'EdgeAlpha', 0);
caxis([0, 1]);
colormap jet
subplot(2, 4, 2)
hold on;
axis(dim_xyz_plot);
xlabel('x [m]');
ylabel('y [m]');
zlabel('z [m]');
title('Mean - prior')
daspect([1 1 1]);
view(3);
trisurf(TR.ConnectivityList, TR.Points(:,1), TR.Points(:,2), ...
TR.Points(:,3), faces_map.m, 'EdgeAlpha', 0);
caxis([0, 1]);
colormap jet
subplot(2, 4, 6)
hold on;
axis(dim_xyz_plot);
xlabel('x [m]');
ylabel('y [m]');
zlabel('z [m]');
title(['Var. - prior. Trace = ', num2str(trace(faces_map.P), 5)])
daspect([1 1 1]);
view(3);
trisurf(TR.ConnectivityList, TR.Points(:,1), TR.Points(:,2), ...
TR.Points(:,3), P_prior, 'EdgeAlpha', 0);
var_max = max(P_prior);
caxis([0 var_max]);
end
%% Take first measurement
viewpoint_init = [-7.0711 -7.0711 4.0000 0.7854]; %[10, 0, 4, -pi]
% comment if not taking a first measurement
faces_map = take_measurement_at_viewpoint(viewpoint_init, faces_map, ...
ground_truth_faces_map, map_parameters, sensor_parameters);
P_post = diag(faces_map.P);
P_trace_init = trace(faces_map.P);
P_prior = P_post;
if (matlab_parameters.visualize_map)
subplot(2, 4, 3)
hold on;
axis(dim_xyz_plot);
xlabel('x [m]');
ylabel('y [m]');
zlabel('z [m]');
title('Mean - init ')
daspect([1 1 1]);
view(3);
trisurf(TR.ConnectivityList, TR.Points(:,1), TR.Points(:,2), ...
TR.Points(:,3), faces_map.m, 'EdgeAlpha', 0);
caxis([0 1]);
colormap jet
subplot(2, 4, 7)
hold on;
axis(dim_xyz_plot);
xlabel('x [m]');
ylabel('y [m]');
zlabel('z [m]');
title(['Var. - init Trace = ', num2str(trace(faces_map.P), 5)])
daspect([1 1 1]);
view(3);
trisurf(TR.ConnectivityList, TR.Points(:,1), TR.Points(:,2), ...
TR.Points(:,3), P_post, 'EdgeAlpha', 0);
caxis([0 var_max]);
end
%% Coverage path
data_coverage_path = load([model_name, '_coverage_path.mat']);
coverage_path = data_coverage_path.coverage_path;
%% Execution
metrics = initialize_metrics_inspect();
% Create polynomial path through the control points.
trajectory = plan_path_waypoints(coverage_path(:,1:3), ...
planning_parameters.max_vel, planning_parameters.max_acc);
% Read control yaws
control_yaws = coverage_path(:, 4);
% Also create the yaw trajectory
segment_time = zeros(trajectory.num_elements, 1);
for i = 2 : trajectory.num_elements
segment_time(i) = trajectory.segments(i-1).time;
end
yaw_trajectory = plan_yaw_waypoints(control_yaws, segment_time);
% Sample trajectory to find locations to take measurements at.
[times_meas, points_meas, ~, ~] = ...
sample_trajectory(trajectory, 1/planning_parameters.measurement_frequency);
[~, yaws_meas, ~, ~] = sample_trajectory(yaw_trajectory, ...
1/planning_parameters.measurement_frequency);
trajectory_time = get_trajectory_total_time(trajectory);
% Alternatively, spercify a yaw to the measurement point
if planning_parameters.plan_yaw == 0
for i = 1 : size(points_meas,1)
yaws_meas(i) = get_best_yaw(points_meas(i,1:3), map_parameters);
end
end
% Remove the viewpoints beyond budget
idx_in_budget = find(times_meas <= planning_parameters.time_budget);
if length(idx_in_budget) < length(times_meas)
trajectory_time = planning_parameters.time_budget;
end
times_meas = times_meas(idx_in_budget);
points_meas = points_meas(idx_in_budget,:);
yaws_meas = yaws_meas(idx_in_budget,:);
% Combine the viewpoints
num_points_meas = size(points_meas,1);
viewpoints_meas = [points_meas, yaws_meas];
% Take measurements along path.
for i = 1:num_points_meas
faces_map = take_measurement_at_viewpoint(viewpoints_meas(i,:), faces_map, ...
ground_truth_faces_map, map_parameters, sensor_parameters);
metrics.faces_map_m = [metrics.faces_map_m; faces_map.m'];
metrics.faces_map_P_diag = [metrics.faces_map_P_diag; diag(faces_map.P)'];
metrics.P_traces = [metrics.P_traces; trace(faces_map.P)];
metrics.rmses = [metrics.rmses; compute_rmse(faces_map.m(map_parameters.valid_faces), ...
ground_truth_faces_map(map_parameters.valid_faces))];
metrics.wrmses = [metrics.wrmses; compute_wrmse(faces_map.m(map_parameters.valid_faces), ...
ground_truth_faces_map(map_parameters.valid_faces))];
metrics.mlls = [metrics.mlls; compute_mll(faces_map, ground_truth_faces_map)];
metrics.wmlls = [metrics.wmlls; compute_wmll(faces_map, ground_truth_faces_map)];
end
disp(['Trace after execution: ', num2str(trace(faces_map.P))]);
disp(['Time after execution: ', num2str(get_trajectory_total_time(trajectory))]);
gain = P_trace_init - trace(faces_map.P);
if (strcmp(planning_parameters.obj, 'rate'))
cost = max(get_trajectory_total_time(trajectory), 1/planning_parameters.measurement_frequency);
disp(['Objective after optimization: ', num2str(-gain/cost)]);
elseif (strcmp(planning_parameters.obj, 'exponential'))
cost = get_trajectory_total_time(trajectory);
disp(['Objective after optimization: ', num2str(-gain*exp(-planning_parameters.lambda*cost))]);
end
metrics.viewpoints_meas = [metrics.viewpoints_meas; viewpoints_meas];
metrics.times = [metrics.times; times_meas'];
metrics.path_travelled = [metrics.path_travelled; coverage_path];
metrics.trajectory_travelled = [metrics.trajectory_travelled; trajectory];
disp(['Time elapsed: ', num2str(times_meas)]);
if (matlab_parameters.visualize_map)
subplot(2, 4, 4)
hold on;
axis(dim_xyz_plot);
xlabel('x [m]');
ylabel('y [m]');
zlabel('z [m]');
title('Mean - final ')
daspect([1 1 1]);
view(3);
trisurf(TR.ConnectivityList, TR.Points(:,1), TR.Points(:,2), ...
TR.Points(:,3), metrics.faces_map_m(end,:)', 'EdgeAlpha', 0);
caxis([0 1]);
colormap jet
subplot(2, 4, 8)
hold on;
axis(dim_xyz_plot);
xlabel('x [m]');
ylabel('y [m]');
zlabel('z [m]');
title(['Var. - final Trace = ', num2str(metrics.P_traces(end,:), 5)])
daspect([1 1 1]);
view(3);
trisurf(TR.ConnectivityList, TR.Points(:,1), TR.Points(:,2), ...
TR.Points(:,3), metrics.faces_map_P_diag(end,:)', 'EdgeAlpha', 0);
caxis([0 var_max]);
end
if (matlab_parameters.visualize_path)
fig_path = figure;
hold on;
xlabel('x [m]');
ylabel('y [m]');
zlabel('z [m]');
ax_path = fig_path.CurrentAxes;
daspect(ax_path, [1 1 1]);
view(ax_path, 3);
% mesh object
h_mesh = trimesh(TR);
h_mesh.FaceColor = 'w';
h_mesh.FaceAlpha = 1;
h_mesh.EdgeColor = 'c';
h_mesh.LineWidth = 0.5;
h_mesh.LineStyle = '-';
num_path_segments = size(metrics.trajectory_travelled, 1);
% path and viewpoints
axis([map_parameters.dim_x_env map_parameters.dim_y_env ...
0 map_parameters.dim_z_env(2)]);
plot_path_viewpoints(ax_path, num_path_segments, metrics.path_travelled, ...
metrics.trajectory_travelled, metrics.viewpoints_meas);
% camera fov
if (matlab_parameters.visualize_cam)
for i = 1 : size(metrics.viewpoints_meas, 1)
% pause;
cam_pos = metrics.viewpoints_meas(i, 1:3)';
cam_roll = sensor_parameters.cam_roll;
cam_pitch = sensor_parameters.cam_pitch;
cam_yaw = sensor_parameters.cam_yaw + metrics.viewpoints_meas(i,4);
plot_camera_fov(ax_path, cam_pos, cam_roll, cam_pitch, cam_yaw, ...
sensor_parameters.fov_x, sensor_parameters.fov_y, ...
sensor_parameters.fov_range_max, 'r');
[F_visible, faces_visible] = get_visible_faces(map_parameters.num_faces, ...
map_parameters.F_points, map_parameters.F_center, ...
map_parameters.F_normal, cam_pos, cam_roll, cam_pitch, cam_yaw, sensor_parameters);
for iFace = 1 : map_parameters.num_faces
if F_visible(iFace) == 1
patch(ax_path, 'XData', map_parameters.F_points(iFace, 1, :), ...
'YData', map_parameters.F_points(iFace, 2, :), ...
'ZData', map_parameters.F_points(iFace, 3, :), ...
'FaceColor', 'b', ...
'FaceAlpha', 0.5, ...
'EdgeColor', 'b');
end
end
end
end
end
figure;
plot_metrics(metrics);
save([root_folder, '/logs/cylinder/', model_name, '_coverage_', 'kernel_', ...
num2str(map_parameters.kernel_choice), '_metrics.mat'], 'metrics');