commandsDialog 0 0 737 894 Rvu Commands true <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd"> <html><head><meta name="qrichtext" content="1" /><style type="text/css"> p, li { white-space: pre-wrap; } </style></head><body style=" font-family:'Lucida Grande'; font-size:13pt; font-weight:400; font-style:normal;"> aim [ mag [ x y z ] ] Zoom in by mag on point x y z . The view point is held constant; only the view direction and size are changed. If x y z is missing, the cursor is used to select the view center. A negative magnification factor means zoom out. The default factor is one. exposure [ spec ] Adjust exposure. The number spec is a multiplier used to compensate the average exposure. A value of 1 renormalizes the image to the computed average, which is usually done immediately after startup. If spec begins with a ’+’ or ’-’, the compensation is interpreted in f-stops (ie. the power of two). If spec begins with an ’=’, an absolute setting is performed. An ’=’ by itself permits interactive display and setting of the exposure. If spec begins with an ’@’, the exposure is adjusted to present similar visibility to what would be experienced in the real environment. If spec is absent, or an ’@’ is followed by nothing, then the cursor is used to pick a specific image location for normalization. focus [ distance ] Set focus distance for depth-of-field sampling. If a distance in world coordinates is absent, then the cursor is used to choose a point in the scene on which to focus. (The focus distance setting does not affect rendering in rvu, but can be used in rpict with the -pd option to simulate depth-of-field on views saved from rvu.) frame [ xmin ymin xmax ymax ] Set frame for refinement. If coordinates are absent, the cursor is used to pick frame boundaries. If ‘‘all’’ is specified, the frame is reset to the entire image. free Free cached object structures and associated data. This command may be useful when memory is low and a completely different view is being generated from the one previous. last [ file ] Restore the previous view. If a view or picture le is specified, the parameters are taken from the last view entry in the file. L [ vw [ rfile ] ] Load parameters for view vw from the rad input file, rfile. Both vw and rfile must be given the first call, but subsequent calls will use the last rfile as a default, and "1" as the default view (ie. the first view appearing in rfile). move [ mag [ x y z ] ] Move camera mag times closer to point x y z . For a perspective projection (or fisheye view), only the view point is changed; the view direction and size remain constant. The view size must be modified in a parallel projection since it determines magnification. If x y z is missing, the cursor is used to select the view center. A negative magnification factor decreases the object size. The default factor is one. Care must be taken to avoid moving behind or inside other objects. new [ nproc ] Restart the image, using the specified number of rendering processes. Usually used after the "set" command. pivot angle [ elev [ mag [ x y z ] ] ] Similar to the "move" command, but pivots the view about a selected point. The angle is measured in degrees around the view up vector using the right hand rule. The optional elev is the elevation in degrees from the pivot point; positive raises the view point to look downward and negative lowers the view point to look upward. quit Quit the program. ^R Redraw the image. Use when the display gets corrupted. On some displays, occassionally forcing a redraw can improve appearance, as more color information is available and the driver can make a better color table selection. rotate angle [ elev [ mag ] ] Rotate the camera horizontally by angle degrees. If an elevation is specified, the camera looks upward elev degrees. (Negative means look downward.) set [ var [ val ] ] Check/change program variable. If var is absent, the list of available variables is displayed. If val is absent, the current value of the variable is displayed and changed interactively. Otherwise, the variable var assumes the value val. Variables include: ambient value (av), ambient value weight (aw), ambient bounces (ab), ambient accuracy (aa), ambient divisions (ad), ambi- ent radius (ar), ambient samples (as), black&white (b), back face visibility (bv), direct jitter (dj), direct sampling (ds), direct threshold (dt), direct visibility (dv), irradiance (i), limit weight (lw), limit recursion (lr), medium extinction (me), medium albedo (ma), medium eccentricity (mg), medium sampling (ms), pixel sample (ps), pixel threshold (pt), specular jitter (sj), specular threshold (st), and uncorrelated sampling (u). Once a variable has been changed, the "new" command can be used to recompute the image with the new parameters. If a program variable is not available here, it may show up under some other command or it may be impossible to change once the program is running. trace [ xbeg ybeg zbeg xdir ydir zdir ] Trace a ray. If the ray origin and direction are absent, the cursor is used to pick a location in the image to trace. The object intersected and its material, location and value are displayed. V [ vw [ rfile ] ] Append the current view as view vw in the rad file rfile. Compliment to L command. Note that the view is simply appended to the file, and previous views with the same name should be removed before using the file with rad. write [ file ] Write picture to file. If argument is missing, the current file name is used. ^Z Stop the program. The screen will be redrawn when the program resumes.</body></html>