Command: blow

Syntax

blow

Description

Interactively blow up the current view in a graphic window.

Parameters

 None

Switches

• -c
  Use a circle as the blow up area. The default behavior is to use a rectangle.

• -env
  When combined with the -ow switch, copy to the destination window the graphic environment of the source window. The default behavior is to leave the graphic environment of the destination window unchanged.

• -im
  Interactively zoom the window in or out by dragging the mouse with a button depressed. Downward mouse movement will zoom in, upward mouse movement will zoom out. Use of this option will suppress the -c,-ow,-sup and -wb options. Interactively it is a crude pixel zoom operation only, and at the end of the operation, i.e. on the button up, a full vector redraw is performed. The window must have save-unders turned on. This facility is available on Windows systems only.

• -iw=<window>
  The window to blow up. This must be a graphic window. If this switch is omitted, the window to blow up is determined by the mouse-indicated blow-up area.

• -ow=<window>
  The window to display the blown-up graphics. This must be a graphic window. If it is omitted the graphics are displayed in the window of the blow-up area (the input window).

• -rev
  When used with the -im option, reverses the results of downward and upward mouse movement.

• -sup
  Suppress the immediate display of the new image.

• -wb=<points>
  Two 3-D points in modeling space indicating either two corners of the blow area (for rectangles), or the center of the blow area and a point on the circumference (for circles). If you provide values which are outside the window’s current corners, the window will shrink out (see the shrink command).

Notes

The blow-up area is indicated by a mouse operation to indicate a corner, followed by a rubber box operation, or a circle center followed by a point on its circumference.

The angle of view is unchanged by this command.

If the rubber box and output window have different aspect ratios, the graphics will be displayed such that the mid-point of the output window corresponds to that of the blow-up area.

Examples

Blow up in the same window (determined by the initial mouse hit).

blow

Blow up in the same window and position the front and rear viewing planes.

blow -wb=<p0,(1000,1000,1000)>

Blow up in one window and display in another, using a rubber circle.

blow -iw=win1, -ow=win2, -c

Blow up and display in a new window (indicated by another rubber box operation).

blow -ow=new_window

Zoom in interactively. Enable save-unders first.

mywin.save_under = 1
blow -iw=mywin,-im

See Also