Prs3d Class Reference

The Prs3d package provides the following services. More...

#include <Prs3d.hxx>

Static Public Member Functions
static Standard_Boolean	MatchSegment (const Quantity_Length X, const Quantity_Length Y, const Quantity_Length Z, const Quantity_Length aDistance, const gp_Pnt &p1, const gp_Pnt &p2, Quantity_Length &dist)
	draws an arrow at a given location, with respect to a given direction. More...
static Standard_Real	GetDeflection (const TopoDS_Shape &theShape, const Handle< Prs3d_Drawer > &theDrawer)
	Computes the absolute deflection value depending on the type of deflection in theDrawer: More...

Detailed Description

The Prs3d package provides the following services.

• a presentation object (the context for all modifications to the display, its presentation will be displayed in every view of an active viewer)
• an attribute manager governing how objects such as color, width, and type of line are displayed; these are generic objects, whereas those in StdPrs are specific geometries and topologies.
• generic algorithms providing default settings for objects such as points, curves, surfaces and shapes
• a root object which provides the abstract framework for the DsgPrs definitions at work in display of dimensions, relations and trihedra.

Member Function Documentation

static Standard_Real Prs3d::GetDeflection ( const TopoDS_Shape &  theShape, const Handle< Prs3d_Drawer > &  theDrawer  )

static

Computes the absolute deflection value depending on the type of deflection in theDrawer:

• Aspect_TOD_RELATIVE: the absolute deflection is computed using the relative deviation coefficient from theDrawer and the shape's bounding box;
• Aspect_TOD_ABSOLUTE: the maximal chordial deviation from theDrawer is returned.

In case of the type of deflection in theDrawer computed relative deflection for shape is stored as absolute deflection. It is necessary to use it later on for sub-shapes. This function should always be used to compute the deflection value for building discrete representations of the shape (triangualtion, wireframe) to avoid incosistencies between different representations of the shape and undesirable visual artifacts.

static Standard_Boolean Prs3d::MatchSegment ( const Quantity_Length  X, const Quantity_Length  Y, const Quantity_Length  Z, const Quantity_Length  aDistance, const gp_Pnt &  p1, const gp_Pnt &  p2, Quantity_Length &  dist  )

static

draws an arrow at a given location, with respect to a given direction.

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The documentation for this class was generated from the following file:

• Prs3d.hxx