More about Wrapping

• How is the Wrapping Representation Calculated?
• Step 1: Computing Points Using the Grain Parameter
• Step 2: Offsetting Points Using the Offset Ratio Parameter
• Step 3: Building the Result 
• How the Grain and Offset Parameters Impact the Wrapping Calculation? (Tables)

How is the Wrapping Representation Calculated?

You generate a wrapping from existing geometric elements by:

• computing a set of points regularly spaced on the envelope of the original geometry (distance between points = grain parameter)
• offsetting these points to obtain a inflated result which better includes the original geometry (offset value = grain * offset ratio)
• building triangles from the set of offset points.   
  

The following example aims at illustrating these three steps as well as the impact of grain and offset ratio parameters on the final result.
 

Step 1: Computing Points Using the Grain Parameter

Step 2: Offsetting Points Using the Offset Ratio Parameter

Step 3: Building the Result 

Case 1: Offset Ratio = 0.0	Case 2:  Offset Ratio = 0.5

Particular Case: illustration of how the frontier between inner area and outer area is calculated:

Case 3: Cubic option set

When the cubic check box is selected, the result is a voxel (cubic) representation of the envelope. The voxel size equals the grain parameter. The offset ratio is not used.
 

How the Grain and Offset Parameters Impact the Wrapping Calculation?

The table below shows the grain parameter impact on the wrapping calculation:

Grain Value	Computation Time	Used Memory	Resulting Size (number of triangles)
Greater	Shorter	Less	Smaller
Smaller	Longer	More	Bigger

The table below shows the offset ratio impact on the wrapping calculation:

Offset Ratio Value	Computation Time	Used Memory	Resulting Geometric Size	Resulting Size (number of triangles)
Greater	No Change	No Change	Bigger	No change
Smaller	No Change	No Change	Smaller	No Change
Cubic Mode	Shorter	Less	Includes entirely the original geometry	No Change