Aero.VirtualRealityAnimation

Construct virtual reality animation object

Syntax

h = Aero.VirtualRealityAnimation

Description

h = Aero.VirtualRealityAnimation constructs a virtual reality animation object. The animation object is returned to h. The animation object has the following methods and properties.

Limitations

The Aero.VirtualRealityAnimation object is not available for Aerospace Toolbox Online.

Constructor Summary

Constructor	Description
`VirtualRealityAnimation`	Construct virtual reality animation object.

Method Summary

Method	Description
`addNode`	Add existing node to current virtual reality world.
`addRoute`	Add VRML ROUTE statement to virtual reality animation.
`addViewpoint`	Add viewpoint for virtual reality animation.
`delete`	Destroy virtual reality animation object.
`initialize`	Create and populate virtual reality animation object.
`nodeInfo`	Create list of nodes associated with virtual reality animation object.
`play`	Animate virtual reality world for given position and angle in time series data.
`removeNode`	Remove node from virtual reality animation object.
`removeViewpoint`	Remove viewpoint node from virtual reality animation.
`saveas`	Save virtual reality world associated with virtual reality animation object.
`updateNodes`	Set new translation and rotation of moveable items in virtual reality animation.

Notes on Aero.VirtualRealityAnimation Methods

Aero.VirtualRealityAnimation methods that change the current virtual reality world use a temporary .wrl file to manage those changes. These methods include:

Be aware of the following behavior:

After the methods make the changes, they reinitialize the world, using the information stored in the temporary .wrl file.
When you delete the virtual reality animation object, this action deletes the temporary file.
Use the saveas method to save the temporary .wrl file.
These methods do not affect user-created .wrl files.

Property Summary

Property	Description	Values
`Name`	Specify name of the animation object.	Character vector \| string
`VRWorld`	Returns the vrworld object associated with the animation object.	MATLAB array
`VRWorldFilename`	Specify the `.wrl` file for the vrworld.	Character vector \| string
`VRWorldOldFilename`	Specify the old `.wrl` files for the vrworld.	MATLAB array
`VRWorldTempFilename`	Specify the temporary `.wrl` file for the animation object.	Character vector \| string
`VRFigure`	Returns the vrfigure object associated with the animation object.	MATLAB array
`Nodes`	Specify the nodes that the animation object contains.	MATLAB array
`Viewpoints`	Specify the viewpoints that the animation object contains.	MATLAB array
`TimeScaling`	Specify the time scaling, in seconds.	double
`TStart`	Specify the recording start time, in seconds.	double
`TFinal`	Specify end time, in seconds.	double
`TCurrent`	Specify current time, in seconds.	double
`FramesPerSecond`	Specify rate, in frames per second.	double
`ShowSaveWarning`	Specify save warning display setting.	double `0` — No warning is displayed. Non-zero — Warning is displayed.
`VideoFileName`	Specify video recording file name.	Character vector \| string
`VideoCompression`	Specify video recording compression file type. For more information on video compression, see `VideoWriter`.	`'Archival'` Create Motion JPEG 2000 format file with lossless compression. `'Motion JPEG AVI'` Create compressed AVI format file using Motion JPEG codec. `'Motion JPEG 2000'` Create compressed Motion JPEG 2000 format file. `'MPEG-4'` Create compressed MPEG-4 format file with H.264 encoding (Windows^® 7 systems only). `'Uncompressed AVI'` Create uncompressed AVI format file with RGB24 video. `Aero.VideoProfileTypeEnum` Default: `'Archival'`
`VideoQuality`	Specify video recording quality. For more information on video quality, see the `Quality` property of `VideoWriter`.	Value between `0` and `100`. double Default: `75`
`VideoRecord`	Enable video recording.	`'on'` Enable video recording. `'off'` Disable video recording. `'scheduled'` Schedule video recording. Use this property with the `VideoTStart` and `VideoTFinal` properties. Default: `'off'`
`VideoTStart`	Specify video recording start time for scheduled recording.	Value between `TStart` and `TFinal`. double Default: `NaN`, which uses the value of `TStart`.
`VideoTFinal`	Specify video recording stop time for scheduled recording.	Value between `TStart` and `TFinal`. double Default: `NaN`, which uses the value of `TFinal`.

Examples

collapse all

Record Virtual Reality Animation Object Simulation

This example shows how to record virtual reality animation of an object simulation.

Record the simulation of a virtual reality animation object
Simulate and record flight data
Create an animation object

h = Aero.VirtualRealityAnimation;
% Control the frame display rate.

h.FramesPerSecond = 10;

% Configure the animation object to set the seconds of animation data per
% second time scaling (TimeScaling) property.

h.TimeScaling = 5;

% The combination of FramesPerSecond and TimeScaling property determine the
% time step of the simulation. These settings result in a time step of
% approximately 0.5 s.
% This code sets the .wrl file to use in the virtual reality animation.

h.VRWorldFilename = [matlabroot,'/toolbox/aero/astdemos/asttkoff.wrl'];

% Copy the .wrl file to a temporary directory and set the world file name
% to the copied .wrl file.

copyfile(h.VRWorldFilename,[tempdir,'asttkoff.wrl'],'f');
h.VRWorldFilename = [tempdir,'asttkoff.wrl'];

% Load the animation world described in the 'VRWorldFilename' field of the
% animation object.

h.initialize();

% Set simulation timeseries data. takeoffData.mat contains logged simulated
% data. takeoffData is set up as a 'StructureWithTime', which is one of the
% default data formats.

load takeoffData
[~, idxPlane] = find(strcmp('Plane', h.nodeInfo));
h.Nodes{idxPlane}.TimeseriesSource = takeoffData;
h.Nodes{idxPlane}.TimeseriesSourceType = 'StructureWithTime';

% Use the example custom function vranimCustomTransform to correctly line
% up the position and rotation data with the surrounding objects in the
% virtual world. This code sets the coordinate transformation function for
% the virtual reality animation.

h.Nodes{idxPlane}.CoordTransformFcn = @vranimCustomTransform;

% Set up recording properties.

h.VideoRecord = 'on';
h.VideoQuality = 50;
h.VideoCompression = 'Motion JPEG AVI'
h.VideoFilename = 'astMotion_JPEG_VR';

% Play the animation.

h.play();

% Verify that a file named astMotion_JPEG_VR.avi was created in the current folder.
% Disable recording to preserve the file.

h.VideoRecord = 'off';

Record Virtual Reality Animation for Four Seconds

This example shows how to simulate flight data for four seconds.

% Create an animation object.
h = Aero.VirtualRealityAnimation;

% Control the frame display rate.
h.FramesPerSecond = 10;

% Configure the animation object to set the seconds of animation data per 
% second time scaling (TimeScaling) property.
h.TimeScaling = 5;

% The combination of FramesPerSecond and TimeScaling properties determines 
% the time step of the simulation. These settings result in a time step of 
% approximately 0.5 s.
% This code sets the .wrl file to use in the virtual reality animation.
h.VRWorldFilename = [matlabroot,'/toolbox/aero/astdemos/asttkoff.wrl'];

% Copy the .wrl file to a temporary directory and set the world file name 
% to the copied .wrl file.
copyfile(h.VRWorldFilename,[tempdir,'asttkoff.wrl'],'f');
h.VRWorldFilename = [tempdir,'asttkoff.wrl'];

% Load the animation world described in the 'VRWorldFilename' field of the 
% animation object. 
h.initialize();

% Set simulation timeseries data. takeoffData.mat contains logged simulated 
% data. takeoffData is set up as a 'StructureWithTime', which is one of the 
% default data formats.
load takeoffData
[~, idxPlane] = find(strcmp('Plane', h.nodeInfo));
h.Nodes{idxPlane}.TimeseriesSource = takeoffData;
h.Nodes{idxPlane}.TimeseriesSourceType = 'StructureWithTime';

% Use the example custom function vranimCustomTransform to correctly line 
% up the position and rotation data with the surrounding objects in the 
% virtual world. This code sets the coordinate transformation function for 
% the virtual reality animation.
h.Nodes{idxPlane}.CoordTransformFcn = @vranimCustomTransform;

% Set up recording properties.
h.VideoRecord = 'on';
h.VideoQuality = 50;
h.VideoCompression = 'Motion JPEG AVI'
h.VideoFilename = 'astMotion_JPEG';

% Play the animation from TFinal to TStart.
h.TSTart = 1;
h.TFinal = 5;
h.play();

% Verify that a file named astMotion_JPEG_VR.avi was created in the 
% current folder. When you rerun the recording, notice that the play time 
% is faster than when you record for the length of the simulation time.

% Disable recording to preserve the file.
h.VideoRecord = 'off';

Schedule Three Second Recording of Virtual Reality Object Simulation

This example shows how to schedule a three second recording a virtual reality object animation simulation.

% Create an animation object.
h = Aero.VirtualRealityAnimation;

% Control the frame display rate.
h.FramesPerSecond = 10;

% Configure the animation object to set the seconds of animation data per
% second time scaling (TimeScaling) property.
h.TimeScaling = 5;

% The combination of FramesPerSecond and TimeScaling properties determines
% the time step of the simulation. These settings result in a time step of
% approximately 0.5 s.
% This code sets the .wrl file to use in the virtual reality animation.
h.VRWorldFilename = [matlabroot,'/toolbox/aero/astdemos/asttkoff.wrl'];

% Copy the .wrl file to a temporary directory and set the world file name
% to the copied .wrl file.
copyfile(h.VRWorldFilename,[tempdir,'asttkoff.wrl'],'f');
h.VRWorldFilename = [tempdir,'asttkoff.wrl'];

% Load the animation world described in the 'VRWorldFilename' field of the
% animation object.
h.initialize();

% Set simulation timeseries data. takeoffData.mat contains logged
% simulated data. takeoffData is set up as a 'StructureWithTime', which is
% one of the default data formats.
load takeoffData
[~, idxPlane] = find(strcmp('Plane', h.nodeInfo));
h.Nodes{idxPlane}.TimeseriesSource = takeoffData;
h.Nodes{idxPlane}.TimeseriesSourceType = 'StructureWithTime';

% Use the example custom function vranimCustomTransform to correctly line
% up the position and rotation data with the surrounding objects in the
% virtual world. This code sets the coordinate transformation function for
% the virtual reality animation.
h.Nodes{idxPlane}.CoordTransformFcn = @vranimCustomTransform;

% Set up recording properties.
h.VideoQuality = 50;
h.VideoCompression = 'Motion JPEG AVI';
h.VideoFilename = 'astMotion_JPEG';

% Set up simulation time from TFinal to TStart.
h.TSTart = 1;
h.TFinal = 5;

% Set up to record between two and four seconds of the four second
% simulation.
h.VideoRecord='scheduled';
h.VideoTSTart = 2;
h.VideoTFinal = 4;

% Play the animation.
h.play();

% Verify that a file named astMotion_JPEG_VR.avi was created in the
% current folder. When you rerun the recording, notice that the play time
% is faster than when you record for the length of the simulation time.
% Disable recording to preserve the file.
h.VideoRecord = 'off';

Introduced in R2007b

Aerospace Toolbox Documentation

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