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Up: Primary Command EYE
Previous: EYE WALK eye_point [[view_point] [[up_point] [size]]]
This command may be used to simultaneously scale and translate the current drawing of the model.
Note that when the Open GL driver is available dynamic rotate, zoom and pan are activated with <CTRL> and the left, middle or right mouse buttons respectively.
| Control | Comments | |
| IN | [/CURSOR] | The cursor may be used twice to define opposite corners |
| [ndc1 ndc2] | of the zoom window (this is the default). The current | |
| picture is then transformed so that the contents of the | ||
| zoom window expand to fit the current viewport. | ||
| Alternatively, opposite corners of the zoom window may | ||
| be specified in normalised device co-ordinates (pairs of | ||
| screen co-ordinates in the range 0-1). | ||
| OUT | [/CURSOR] | The cursor may be used twice to define opposite corners |
| [ndc1 ndc2] | of the zoom window (this is the default). The current | |
| picture is then transformed so that the contents of the | ||
| zoom window expand to fit the current viewport. | ||
| Alternatively, opposite corners of the zoom window may | ||
| be specified in normalised device co-ordinates (pairs of | ||
| screen co-ordinates in the range 0-1). | ||
| /CURSOR | This is equivalent to the command | |
| EYE ZOOM IN /CURSOR. | ||
| ndc1 ndc2 | This is equivalent to the command | |
| EYE ZOOM IN ndc1 ndc2. (ndc1 and ndc2 are pairs | ||
| of screen co-ordinates in the range 0-1). | ||
| FACTOR | Factor [coords] | A scale factor may be specified. In addition a shift may |
| be specified by giving distances in model coordinates for | ||
| translations in the screen X, Y and Z directions. Note | ||
| that if shifts are applied with this command it is the eye | ||
| that shifts, rather than the model. |
Examples:
A scale factor of 0.5 is applied to the current view. The centre of the zoom is the centre of the current viewport.
A scale factor of 4 is applied to the current view. The centre of the zoom is the centre of the current viewport. In addition a translation is applied such that the eye moves 100 model coordinates along the screen y-axis.
This would have the effect of zooming in on the bottom left hand corner of the screen.
See also the following commands
Femsys Limited