Before you start trying to master the Advanced Controls, make sure you have read the Basic Commands article so that you can understand the nature of the 3D View tool.
In order to reveal the controls, select the “Show Advanced Controls” in the bottom left corner of the 3D View.
Advanced Controls can be accessed for both 2D and 3D Overlays and they allow access to two sets of controls, Anchor Points (only available for 2D Overlays) and Position Values.
Editing the values
If you are opening any Overlay using the 3D View and you have activated the Advanced Controls view, the values shown in the boxes will have been automatically generated.
To make a change, select the text box you wish to edit, type the new value, and ensure that you hit return for the change to take effect.
Note: when entering a negative number, delete the existing number, type ‘-‘ first, and then the rest of the number, before hitting return.
- Anchor Points:
- Users can define the exact position of an Overlay’s Anchor Points, or corners. Each corner has an x, y & z value thus giving the Overlay an exact position in 3D space
- Users can customize their Overlay in 3D space by editing Translation / Rotation / Scale as well as Shear, for 2D overlays. These values are always relative to the central pivot point of the Overlay
- For 3D Overlays the central pivot point would be the centre of the 3D scene, not the centre of the 3D object
1) Anchor Points:
When you create a 2D Overlay it inherits the anchor point values from the Trigger Image. When opening the 3D View you can see what these values are when the the Advanced Controls option has been selected.
The 3 axis, X, Y and Z will all be 0 at the center of the Trigger.
Top left: x=-0.5 y=0.5 z=0
Top right: x=0.5 y=0.5 z=0
Bottom left: x=-0.5 y=-0.5 z=0
It is possible to use values that exceed the edges of the Trigger image.
Only three Anchor Points are listed as the forth point is calculated automatically – this is to prevent distortion of the Overlay. 3D overlay controls do not allow you to edit the Anchor Points but do provide position, rotation and translation. Non-uniform scaling and skewing are not permitted.
2) Position Values:
These controls allow you to set an exact value for the Overlay’s overall Scale, Position, Rotation and Shear.
The editable values are calculated as a percentage of the width of the Trigger Image.
1 unit = 1% of the width of the Trigger Image
The width of your Trigger Image will always be represented by the value 100 so if you know that the width of your Trigger Image is 1m, adjusting Scale or Position by 1 unit will be the equivalent of 1cm.
On the other hand, Rotation and Shear are given in degrees.
3) 3D Overlays:
In order to position the 3D Overlay more easily, it is important that the 3D alloy is positioned so that the front of the alloy is at world zero in the scene before export. This will mean that the middle of the front of the 3D object will equate to the middle of the 2D Overlay when opened in the 3D Viewer, as a result making it easier to place.