| Other |
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W4M Installation From July 12th 2002 Demo CD May Fail
Users who picked up the WinVis Demo CD at the Bay Area Vision Research Day at UC-Berkeley on July 12th, may experience difficulties when trying to install W4M from the CD. If you are experienceing these problems, we recommend that you download the latest version of the installation files from the online download center. |
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On-line WinVis intertrial fixation and backgound
When defining an online WinVis experiment, setting the intertrial fixation pattern, backgound or stimulus settings will have no effect on the run time presentation. The intertrial period will have a single luminance that corresponds to the stimulus intensity of 0.0. |
| WinVis for Matlab |
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JVM issues
There are a number of problems in W4M where parts of the program conflict with the Java Virtual Machine (JVM) used by Matlab 6.0 and higher. One of the most common problems is that after initializing W4M, every keystroke will cause the computer to beep.
There are a few solutions for getting around this problem. One solution is to simply disable the JVM before loading matlab. This can be done by changing your matlab shortcut to point to: 'matlab.exe -nojvm' rather than 'matlab.exe'. One of the adverse effects of completely disabling the JVM is that features such as the m-file editor, and path editor are not available.
The other solution is to open two Matlab windows. Open one window normally, and the other using the 'matlab.exe -nojvm' option described above. Use the normal version of Matlab to edit m-files and write scripts, and use the 'nojvm' version of Matlab to execute your scripts. This second solution will minimize the effects of the JVM conflicts, while still allowing you to make use of the entire Matlab environment. |
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DLL background as NaN
Stimulus DLLs generated by the online Stimulus Editor will no longer be filled with the default background color. Instead, areas of the stimulus designated as background will be represented by the Not-A-Number (NaN) floating-point value. This will require users to manually convert the NaN values into the appropriate background pixel values before loading them into WinVis For Matlab. This change was made in order to allow for non-rectuangular stimuli to be used within W4M. This change was made in W4M version 1.0.2. |
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Keyboard and/or mouse input may not register
With W4M version 1.09 and earlier, some computers may not be able to use keyboard and mouse input. During a trial run, W4M sets its OS Priority to Real Time priority, which on some computers will prevent the OS from responding to keyboard and mouse inputs.
This problem may cause systems to hang if a trial is waiting for a trial trigger, or it may cause invalid data to be returned for trial timers, and button tracking. W4M version 1.10 solves this problem with adjustable OS Priority. |
| WinVis Website |
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Downloads page doesn't work with JavaScript disabled.
Anyone visiting the downloads page with JavaScript disabled will not be able to access the downloads. As a work-around, download the files from a JavaScript enabled workstation. This bug will be fixed in the next release of the WinVis Web Site. |