Function GetTessellationQuality() As System.Integer

Dim instance As IModelDoc2
Dim value As System.Integer
 
value = instance.GetTessellationQuality()

System.int GetTessellationQuality()

System.int GetTessellationQuality(); 

Return Value

This method returns a number (QualityNum) that corresponds to the degree of tessellation of curved surfaces for shaded rendering output. Tools > Options > Document Properties > Image Quality includes a field that sets the maximum chordal deviation. QualityNum and the maximum chordal deviation (in meters) are coupled and inversely proportional as follows:

var = TessMin + QualityNum*((TessMax-TessMin)/100)

Deviation = 0.025 * (BodyDiameter * 2) / var;

where:

• TessMin = 6
• TessMax = 166
• 0 < QualityNum (returned by this method) < 106
• BodyDiameter is the diagonal distance across the bounds of the part box. See IPartDoc::GetPartBox or IPartDoc::IGetPartBox for more information.

You can also get the maximum chordal deviation using swUserPreferencesDouble_e.swImageQualityShadedDeviation.

To get the image quality number, use swUserPreferenceInteger_e.swImageQualityShaded.

NOTE: Setting the degree of tessellation to a higher value results in:

• finer tessellation,
• increased file size,
• slower graphics performance, and
• increased memory usage.