Article	60001204
Type	HowTo
Product	Engine
Version	6
Date Added	8/19/2010
Submitted by	Holloway, Keith D
Keywords

Subject

Zooming and paning with drawings with very large values of extends

Summary

Zooming and paning with drawings with very large values of extends larger than 1.0e+10

Solution

VectorDraw has limits for maximum and minimum PixelSize values.
PixelSize represent the result of:  ViewSize in Drawing Units / Height of active Render Viewport in pixels.
You can control these values by using
VectorDraw.Geometry.Globals.MaximunPixelSize which by default is 1.0e+09

and

VectorDraw.Geometry.Globals.DefaultPixelEquality which by default is 1.0E-10d

example Zooming and paning with drawings with very large values of extends:

Globals.MaximunPixelSize = 1.0e+18;

Globals.DefaultPixelEquality = 1.0d / Globals.MaximunPixelSize;

//Also its better to change the following values also

Globals.Default3DMatrixEquality = Globals.DefaultPixelEquality;

Globals.DefaultScaleEquality = Globals.DefaultPixelEquality;

Globals.DefaultVectorEquality = Globals.DefaultPixelEquality;