Jelle Feringa a écrit :
>
>> - added SetQuality method in Display3d class
>
> I'm assuming this sets the approximation of the meshes in the viewer (
> the deflection of the mesh ) ?
> Cool, I noticed the meshes we're very precise, but heavy too, so this
> is a welcome addition ( that is, if my assumption is correct ;')
>
> -jelle
Jelle,
Your asumption is absolutely correct! Here is the source code of the
SetQuality method:
void Display3d::SetQuality(Standard_Real factor)
{
/*
Extracted from OCC forum thread
http://www.opencascade.org/org/forum/thread_13256/
*/
myAISContext->SetDeviationAngle(myAISContext->DeviationAngle() /
factor);
myAISContext->SetDeviationCoefficient(myAISContext->DeviationCoefficient()
/ factor);
myAISContext->SetHLRDeviationCoefficient(myAISContext->HLRDeviationCoefficient()
/ factor);
myAISContext->SetHLRAngle(myAISContext->HLRAngle() / factor);
}
As you can see, SetQuality takes a 'factor'parameter. When you call the
SetQuality method, the 'quality' is relative to the current settings:
- SetQuality(factor), factor>1: better precision, big meshes
- SetQuality(factor), factor=1: no change
- SetQuality(factor), factor<1: less precision, light meshes
For example, if you call SetQuality(2) 3 times, it's the same as if you
call SetQuality(8) once (since 2^3 = 8). Maybe I should rename this
function with the name 'SetRelativeQuality' and add another
SetAbsoluteQuality method.
In the previous release, the viewer was initialized with factor=5.
That's why meshes were so big. I dropped this code to a new method to
allow anyone to set his own quality, reduce default memory footprint and
also make the 'Init' method easier to debug (Linux port).
Thomas
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