STISIM Drive - Screen Sizing

An unfortunate problem with the STISIM Drive graphical display is that it can be shown in a number of different screen resolutions depending on the graphics card being used. This is a problem because this freedom makes it possible to set a new resolution even if you do not set any other parameters that are based on this resolution. For an example, lets use the screen sizing parameters. Screen units are generally measured in pixels and if we set the width of the screen to be 640 pixels this is fine except if we are using a screen resolution smaller or greater than 640 (for example a resolution 1024 pixels means the image will only appear on half of the screen). Since numerous features of the simulation display depend upon the size of the screen, using pixels to define various screen positions and sizing is not adequate. Therefore, in STISIM Drive,  the relative size of each screen axis, horizontal (left and right) and vertical (up and down) is specified between 0 and 1, where a value of 0,0 (horizontal, vertical) is the lower left corner of the display and 1,1 is the upper right corner of the display. For example to place the upper left corner of an object in the center of the screen you would set Top to .5 and Left to .5. This way no matter what screen resolution you choose, your screen objects will always be displayed the way you intended them.