How do I create tear away animations more effectively?
This knowledge base article will present some finer details about tear away animations. Properly defining the design in 2D is necessary.
Procedure
In 2D the tear-away parts are defined either by special rules such as perfs or zippers, or by cut lines with gaps, or a combination of the two methods.
Special rule
The 3D property of special rules such as perf or zipper used for tear-aways should be changed to Tear or Tear and fold in the 3D page of the line property in 2D:
3D attribute
Description
Normal crease
Makes a special rule fold, for example if you want to fold a wave rule
Knock-down crease
Knock-down creases or other creases that should be excluded from 3D
Cuts / broken crease
Creases that should be treated as cuts in 3D
Tear
Creases or special rules that you want to tear
Tear and fold
Special rules you want to both tear and fold in 3D
Indent only
Perf makes an indentation in the panel but does not fold or tear
When a special rule has a sequence of lines, like the perfs in the above example, it is recommend that the Group Sequence tool is used, which aligns all the lines and the special rule pattern in the same direction. The group sequence tool is not needed for perfs consisting of a single line.
Tear-Aways with Gaps in Cut Lines
Sometimes the tear-away part has an outline made of cut lines with gaps in-between, such as this tear-strip example:
In some examples, like this one, it's not possible to use a zipper special rule because of the embedded tab and that different zipper teeth have different lengths, so it is programmed as separate lines. To define the outline of the tear-away part, the gaps must be filled in with Tear lines in a 3D Assist layer (the former Mate layer class in previous versions is now called “3D Assist”). Create a 3D assist layer, change the current line type to “Tear”, and create lines to fill in the gaps. In this tear strip example, you could add individual tear lines to fill in each gap, or just two horizontal tear lines through all the gaps.
How do Tear-Aways work?
When a design with tear-away parts is converted to 3D, a design for the original container as well as a separate design for each tear-away part is created. Initially the original container is visible, and the tear-away parts are invisible. When the Select tear-away part tool is used, it makes the initial design invisible and the tear-away parts visible.
When switching from the initial design to the tear-away parts, the tear-away parts are positioned and folded to align with the initial design.
After moving or changing fold angles in the tear-away parts, and switching back to the initial design, the initial design is unchanged.