HCFA Viz User's Manual

• Command Summary
  • from the command line, use the -help flag to display a summary of command line switches
  • once the program starts, type "?" in the window to print a summary of mouse/key commands to the shell window
• Data Frames
  • frame 1 data points are rendered in green, and the clusters are in magenta, frame 2 points are cyan, and the clusters are yellow
  • either the first frame, the second frame, or both frames can be displayed from Menu->Render->Data->Frames
  • select the dimension of the data to lay out along the x, y, or z axis with Menu->Data->Frame1 Axes
  • the legend shows which dimensions are being mapped to the 3 viewing axes (toggle the legend on/off with Menu->Options->Legend
• Moving the Viewpoint
  • click and drag the left mouse button to rotate the data left/right andup/down
  • click and drag the middle mouse button vertically to move the viewpoint in/out of the data
  • to center the view on the "transform" (the red octahedron), use Menu->Render->General->Center Transform, when the transform moves, the view will always center on it
    • to zoom on the current node in frame 1 use Menu->Transform->Zoom->Frame 1 Current, similarly for frame 2 and the current clusters
    • the transform can be toggled to always zoom to the current point (or cluster) with Menu->Transform->Zoom->Auto-Zoom
• Selecting Items
  • the current selected data point is marked with a red rectangle around the point, and a small red dot inside the point, all other selected points are marked with a surrounding red rectangle only
  • frame 1: hold down SHIFT and:
    • left mouse: select single data point
    • middle mouse: select cluster point
    • left and middle: click and drag for selection rectangle
  • frame 2: hold down CTRL and:
    • same commands as for frame 1
  • use Menu->Data->Select->Enter Data Point... to type in a single data point index to display
  • use Menu->Data->Select->Enter Cluster... to type in a single cluster index to display
  • to select the cluster associated with a data point and vice-versa, use Menu->Data->Select->Data From Cluster 1 etc...
• Changing Transparency Level
  • increase/decrease the clipping threshold for the alpha value with the "0" and ")" keys (program will run much faster if the clip value is increased even slightly)
  • use Menu->Render->General->Alpha->Gamma to set the gamma correction on the transparency
  • use Menu->Render->General->Alpha->Weighted Gamma to set the gamma correction on the transparency, which is also weighted by the alpha value for each frame
    • use "1" and "!" keys to increase/decrease the alpha for frame 1
    • use "2" and "@" keys to increase/decrease the alpha for frame 2
    • by default, frame1alpha and frame2alpha are related so that frame1alpha+frame2alpha = 1. you can turn this relationship off with Menu->Render->Data->Blend->Independent, and back on with Menu->Render->Data->Blend->Clamp Frames
  • toggle pdf based transparency with Menu->Render->Data->(No) Alpha PDF
  • by default, selections are drawn fully opaque, toggle transparency for them on/off with Menu->Render->Data->Transparent Selections
• Magnification
  • the "s" and "d" keys smoothly interpolate between the undistorted (source) and magnified (destination) views of the data, and override all other magnification settings
  • all magnification is relative to the transform, which is represented by the red octahedron in the display
  • use "j" and "l" to decrease/increase the degree of magnification
  • you can restrict the magnification to a limited domain with Menu->Transform->Domain->Rectangular, then use the {J,L}, {K,I} and {U,O} keys to decrease/increase the size of the domain along the x, y and z axes. by default, the domain is set to be infinite
  • ALT and the left mouse button can be used to move the transform along the current axis (set the current axis by hitting the "x" "y" or "z" keys)
  • you can mark a place in the display by using Menu->Transform->Push which will leave a blue transform at the current location, and create a new red transform for you to move around.
  • select an old transform with either Menu->Transform->Pop (which will select the most recent transform) or with ALT and a middle mouse click on the desired transform
  • the effect of transforms can be combined with Menu->Transform->Combination->Scaled Average. by default only the top transform on the stack affects the magnification

keahey@lanl.gov