View Control
View control window
This menu appears in the rotate and move modes. It provides buttons for orthogonal rotations and displays the current viewpoint and viewing offsets. Precise positioning can be achieved by typing appropriate values into the edit boxes (and clicking on another box or tabbing or pressing return !).These values can also be put into a batch file for automatic display of specific orientations. Typing in angle values requires all three angles to be entered together so a small extra window is put up for manual entry of orientation. The orientation is achieved by an ordered application of the three rotations.

The sensitivity of the system to mouse movement and cursor keys can be altered by changing the angle increment (which defaults to 1 degree). The return key must be pressed in the edit box for the increment to be updated.

The radio buttons allow access to modes which can only be used after the edit mode has been used to create multiple objects. The Show Composite View button will remain greyed until there are at least two objects available for manipulation. A composite view of the other objects is displayed with the current object highlighted to allow its relative position to be clearly understood. The rendering in this mode is affected by the HiRes option.

When hires is selected, images of the current and other objects are mixed together by dithering to produce a translucent effect. It is also possible to select an alternate rendering mode for the other objects so that normal surface rendering of the current object can be mixed with radiographic or mip style images of the other objects. When hires is not selected, surface rendered images are depth sorted with the nearer surfaces obscuring more distant surfaces.

The Current Obj radio button allows access to a surgical simulation mode. Clicking on this button changes the view control to a mode where only the current object is allowed to move and the frame of reference of the remaining objects remains static.The control menu changes to show its altered function. Extra buttons (like those in the edit mode) are included to allow change of the current active object, mirroring of any object. and selecting which of the available objects will be incuded in the composite image. All orientation changes on the object can be removed with the re-align obj button which restores the current object to its default orientation. The numeric displays of angle and offset relate to the composite orientation and cannot change in this mode. The only exception to this is the initial view button which will restore the front view of the composite data set. Having edited a data set, the save edit option in the file menu allows the information to be saved to a disc file for later retrieval.

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Resize Control

This window appears in the resize mode. It displays current scale both as image resolution and as field of view. Either field may be selected and updated from the keyboard by direct numeric entry (and clicking on another box or tabbing or pressing return !). These values are updated when resizing with the mouse or cursor keys in the main window.

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Backcull Control

This window appears in the back cull mode. It displays the depth of the back cull face in mm. Negative values are behind the current centre of rotation. The depth may be selected and updated from the keyboard by direct numeric entry (press return !). This value is updated when moving the plane with the mouse or cursor keys in the main window. This mode can assist in appreciating the relative depths of parts of the object in view and in determining foam sizes for milling.

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Crop Controls

The crop controls are a quick way of removing parts of the data set from the display but are restricted to the original axes of the data, only allowing entire slices or strips to be ignored. The actions of the mouse and keyboard controls are aligned with the default orientation of the data. If there is any confusion it is advisable to restore the initial view orientation before proceeding. If you want to restore the full object this can always be done in the 3D edit mode. When measuring surface areas or saving STL files, this mode of editing should NOT be used as it will cause incorrect results by failing to include the cut surfaces during processing..

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©1997-2007 Robin Richards. All rights reserved.