Improved log conversion MATLAB script

ROMFS/logging/logconv.m

@@ -65,9 +65,10 @@ logFormat{17} = struct('name', 'rot_matrix',       'bytes', 4, 'array', 9, 'prec
 logFormat{18} = struct('name', 'vicon_position',       'bytes', 4, 'array', 6, 'precision', 'float',   'machineformat', 'ieee-le');
 logFormat{19} = struct('name', 'actuator_control',     'bytes', 4, 'array', 4, 'precision', 'float',   'machineformat', 'ieee-le');
 logFormat{20} = struct('name', 'optical_flow',         'bytes', 4, 'array', 6, 'precision', 'float',   'machineformat', 'ieee-le');
-logFormat{21} = struct('name', 'diff_pressure',    'bytes', 4, 'array', 1, 'precision', 'float',   'machineformat', 'ieee-le');
-logFormat{22} = struct('name', 'ind_airspeed',     'bytes', 4, 'array', 1, 'precision', 'float',   'machineformat', 'ieee-le');
-logFormat{23} = struct('name', 'true_airspeed',    'bytes', 4, 'array', 1, 'precision', 'float',   'machineformat', 'ieee-le');
+logFormat{21} = struct('name', 'omnidirectional_flow', 'bytes', 4, 'array', 22,'precision', 'float',   'machineformat', 'ieee-le');
+logFormat{22} = struct('name', 'diff_pressure',        'bytes', 4, 'array', 1, 'precision', 'float',   'machineformat', 'ieee-le');
+logFormat{23} = struct('name', 'ind_airspeed',         'bytes', 4, 'array', 1, 'precision', 'float',   'machineformat', 'ieee-le');
+logFormat{24} = struct('name', 'true_airspeed',        'bytes', 4, 'array', 1, 'precision', 'float',   'machineformat', 'ieee-le');
 
 % First get length of one line
 columns = length(logFormat);
@@ -83,7 +84,7 @@ if exist(filePath, 'file')
     fileInfo = dir(filePath);
     fileSize = fileInfo.bytes;
     
-    elements = int64(fileSize./(lineLength))
+    elements = int64(fileSize./(lineLength));
     
     fid = fopen(filePath, 'r');
     offset = 0;
@@ -102,8 +103,8 @@ if exist(filePath, 'file')
     
     % shot the flight time
     time_us = sysvector.timestamp(end) - sysvector.timestamp(1);
-    time_s = time_us*1e-6
-    time_m = time_s/60
+    time_s = time_us*1e-6;
+    time_m = time_s/60;
     
     % close the logfile
     fclose(fid);
@@ -112,3 +113,113 @@ if exist(filePath, 'file')
 else
     disp(['file: ' filePath ' does not exist' char(10)]);
 end
+
+%% Plot GPS RAW measurements
+
+% Only plot GPS data if available
+if cumsum(double(sysvector.gps_raw_position(200:end,1))) > 0
+    figure('units','normalized','outerposition',[0 0 1 1])
+    plot3(sysvector.gps_raw_position(200:end,1), sysvector.gps_raw_position(200:end,2), sysvector.gps_raw_position(200:end,3));
+end
+
+
+%% Plot optical flow trajectory
+
+flow_sz = size(sysvector.timestamp);
+flow_elements = flow_sz(1);
+
+xt(1:flow_elements,1) = sysvector.timestamp(:,1); % time column [ms]
+
+
+%calc dt
+dt = zeros(flow_elements,1);
+for i = 1:flow_elements-1
+    dt(i+1,1) = double(xt(i+1,1)-xt(i,1)) * 10^(-6);   % timestep [s]
+end
+dt(1,1) = mean(dt);
+
+
+global_speed = zeros(flow_elements,3);
+
+%calc global speed (with rot matrix)
+for i = 1:flow_elements
+    rotM = [sysvector.rot_matrix(i,1:3);sysvector.rot_matrix(i,4:6);sysvector.rot_matrix(i,7:9)]';
+    speedX = sysvector.optical_flow(i,3);
+    speedY = sysvector.optical_flow(i,4);
+    
+    relSpeed = [-speedY,speedX,0];
+    global_speed(i,:) = relSpeed * rotM;
+end
+
+
+
+px = zeros(flow_elements,1);
+py = zeros(flow_elements,1);
+distance = 0;
+
+last_vx = 0;
+last_vy = 0;
+elem_cnt = 0;
+
+% Very basic accumulation, stops on bad flow quality
+for i = 1:flow_elements
+    if sysvector.optical_flow(i,6) > 5
+        px(i,1) = global_speed(i,1)*dt(i,1);
+        py(i,1) = global_speed(i,2)*dt(i,1);
+        distance = distance + norm([px(i,1) py(i,1)]);
+        last_vx = px(i,1);
+        last_vy = py(i,1);
+    else
+        px(i,1) = last_vx;
+        py(i,1) = last_vy;
+        last_vx = last_vx*0.95;
+        last_vy = last_vy*0.95;
+    end
+end
+
+px_sum = cumsum(px);
+py_sum = cumsum(py);
+time = cumsum(dt);
+
+figure()
+set(gca, 'Units','normal');
+
+plot(py_sum, px_sum, '-blue', 'LineWidth',2);
+axis equal;
+% set title and axis captions
+xlabel('X position (meters)','fontsize',14)
+ylabel('Y position (meters)','fontsize',14)
+% mark begin and end
+hold on
+plot(py_sum(1,1),px_sum(1,1),'ks','LineWidth',2,...
+'MarkerEdgeColor','k',...
+'MarkerFaceColor','g',...
+'MarkerSize',10)
+hold on
+plot(py_sum(end,1),px_sum(end,1),'kv','LineWidth',2,...
+'MarkerEdgeColor','k',...
+'MarkerFaceColor','b',...
+'MarkerSize',10)
+% add total length as annotation
+set(gca,'fontsize',13);
+legend('Trajectory', 'START', sprintf('END\n(%.2f m, %.0f:%.0f s)', distance, time_m, time_s - time_m*60));
+title('Optical Flow Position Integration', 'fontsize', 15);
+
+figure()
+plot(time, sysvector.optical_flow(:,5), 'blue');
+axis([time(1,1) time(end,1) 0 (max(sysvector.optical_flow(i,5))+0.2)]);
+xlabel('seconds','fontsize',14);
+ylabel('m','fontsize',14);
+set(gca,'fontsize',13);
+title('Ultrasound Altitude', 'fontsize', 15);
+
+
+figure()
+plot(time, global_speed(:,2), 'red');
+hold on;
+plot(time, global_speed(:,1), 'blue');
+legend('y velocity (m/s)', 'x velocity (m/s)');
+xlabel('seconds','fontsize',14);
+ylabel('m/s','fontsize',14);
+set(gca,'fontsize',13);
+title('Optical Flow Velocity', 'fontsize', 15);