Vision Operator’s Manual (v12.0 MD) Squeeze & Tease Basic Operation • Ops 12–5
Figure 12.5 Working in 3D Space — Top View
Images can be manipulated outside the visible area to create specific effects. For example, an
image can be rotated in such a way that it appears to roll into view from a point outside the screen
and roll out of view on the other side.
It is also possible to move an image to a point behind the viewer. For example, you can
manipulate an image so that it appears to come towards the viewpoint and keeps going until it
passes by the viewer. For this effect, the image will get larger as it moves towards the viewpoint
and then disappear.
You can also create a circular motion effect where the image sweeps across the screen in a large
arc that appears to continue behind the viewer.
Perspective
Since you are viewing 3D images on a two-dimensional surface (the screen), it is important to
recognize how depth is perceived. This involves understanding relative size, parallax, and
viewpoint perspective.
Relative Size
When working with the Z-Axis, images that are closer appear larger than images further away.
Zooming the image changes the distance between the image and the viewpoint, but does not
change the size of the image (Figure 12.6). Images that are closer also appear over top of images
that are further away.
Figure 12.6 Relative Size of Two Images on the Z-Axis
Visible Area
Image being manipulated within the
3D space, but outside the visible area
Viewpoint
3D Space
Image being manipulated
within the visible area
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