DG Kernel (ActiveX) Documentation

Upgrading Native Apps

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Operations and Algorithms

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Planar Bool Ops

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Import/Export Overview

Data Flow Sample

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DG Kernel Controls

DG Kernel Control

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Properies, Methods, Events

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Interactive Functionality

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Selection Overview

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Auxiliary Views

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Programmatic Functionality

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General Geometry

IPointMatrix_DG

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IBSplineCurve_DG

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ICurveFreeForm_DG

IArcSpline3DCurve_DG

IBSplineCurve2d_DG

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IPartialSplineProps_DG

IBSplineSurface_DG

IBezierSurface_DG

IPartialBezierProps_DG

IRectangularTrimmedSurface_DG

ISurfaceOfRevolution_DG

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Oriented Objects

IObjectOriented_DG

IGeometricObject_DG

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IEntityArray_DG

IStdShapeRef_DG

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IPointSetGeometry_DG

ISegmentStripGeometry_DG

ICurveGeometry_DG

ISurfacePoint_DG

ISurfacePointArray_DG

ILabelGeometry_DG

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BSpline BRep Geometry

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Advanced Algorithms

IBRepChamfer_DG

IBRepDraftAngle_DG

IFeaturePrism_DG

IBRepCompositeSolid_DG

IBRepCompound_DG

IBRepBuilderEx_DG

IWireArrayToSurfaceBuilder_DG

IBRepGeometry_DG

IBRepBuilder_DG

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IMeshGeometry_DG

IVertexSegment_DG

IDiffSurface_DG

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Collision Detection

IPathCollisionDetector_DG

IKinematicEntity_DG

IKinematicSet_DG

IDynamicScreenItem_DG

IDynamicScreenItemManager_DG

ISmartLabelManager_DG

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Import / Export

IDataContext_DG

ISTLDataContext_DG

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Operations and Agorithms

IBooleanEntity_DG

IEuclideanShortestPath_DG

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ILightSource_DG

IViewPointArray_DG

IMeasurement_DG

IRectangleColor_DG

IVirtualModelView_DG

IVirtualView_DG

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General Computing

IObjectGenerator_DG

IControlInitialisationContext_DG

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Samples and Tutorials

Delphi and C++ Samples

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Zoom Sample

C# Implementation details

All implementation is contained in the main form class named ZoomForm.

OnZoom() handler converts screen coordinates of the zoom center to global 3D coordinates using IView_DG.ScreenTo3DEx. The point has to be converted to local to the Eye frame to use the ILook.ZoomEx method. This is accomplished via IFrameEx.ToLocal.for the IFrame of the Eye Frame.

See also All C# samples