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Matrix Window

The Matrix Window may be used to examine the contents of a variety of matrices. It has two panels:

• The Matrix Select Panel, on the left, describes the function of the matrix and shows the makeup of a composite matrix. This allows the selection and display of any of its sub-matrices.
• The Matrix Display Panel displays the content of the matrix which is highlighted in the Matrix Select Panel.

Different matrices may be displayed by clicking the mouse in different locations:

• An object's last transform matrix will be displayed if the mouse is clicked on or near a vertex of the object in the World Panel. This is the matrix that transformed the selected object from it's previous location in the world-coordinate (WC) system to its current WC location. For example, if the view window is selected after it has been translated, the Matrix Select Panel will display the view window last transform matrix, which is the matrix that was applied to the view window to translate it.
  
  An object's last transform matrix will be null (and the Matrix Display Panel blank) if the object hasn't been transformed yet or if the last update was done without a transformation matrix. Using the View Control Window to set the view window minimum or maximum point is an example of this type of operation.
  
  
• A click in the View Window Panel will result in the view-orientation matrix being displayed in the Matrix Window. This matrix transforms world coordinates to viewing-reference coordinates (VRC). If the current projection is parallel, the shear-parallel matrix will also be shown. It transforms viewing-reference coordinates to two-dimensional view window coordinates and adjusts for a PRP that is not lined up with the view window center along the VRC N-axis.
  
  The view-orientation matrix and, in the case of a parallel projection, the shear-parallel matrix, are applied to the model to generate the view of it which is seen in the View Window Panel.
  
  
• And if the mouse button is clicked on one of the sub-matrices in the Matrix Select Panel, the contents of that sub-matrix will be displayed in the Matrix Display Panel.
  
  The sub-matrices which make up an object's last transform matrix can be applied to the object individually after being selected. The menu guide and Composite Matrix Tutorial examine this feature further.

Additional Matrix Window documentation:

• Snapshot image of the Matrix Window
• Menus and Toolbar