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GMModelInterfaces Interface CATICGMSurfaceTessellator

Usage: an implementation of this interface is supplied and you must use it as is. You should not reimplement it.

interface CATICGMSurfaceTessellator

Class defining a tessellation operator on surfaces.

This operator computes a discretized geometry on the surfaces as triangles. The corner of the triangles are called points. Three parameters tune the tessellation result:

Sag: Defines the maximum distance between a bar and the object to tessellate
Step: Defines the maximum length of a bar. If not defined, the step is infinite (this parameter is unused)
Angle: Defines the maximum angle between the normals at each bar end.

The tessellation operator follows the scheme of all CGM operator:

Create an operator instance,
Run,
Optionally, adds other curves to tessellate in the same operation,
Recover the results by the means of iterators,
Delete the operator instance. The deletion of the operator leads to the deletion of the iterators and the arrays of results.

Method Index

o AddSurface(CATSurface*,CATSurLimits&): Adds an other surface to this CATICGMSurfaceTessellator.
o GetSurface(CATSurface*,CATBoolean&,CATCGMTessPointIter**,CATCGMTessStripeIter**,CATCGMTessFanIter**,CATCGMTessPolyIter**,CATCGMTessTrianIter**): Retrieves the results associated with a surface.
o Run(): Runs this CATICGMSurfaceTessellator.
o SetStep(double): Defines a finite step for this CATICGMCurveTessellator.

Methods

o AddSurface

public virtual AddSurface(		`iSurface`,
	const	`iSurfaceLimits`)

Adds an other surface to this CATICGMSurfaceTessellator.

Parameters:

iSurface: The other surface to tessellate in the same operation.
iSurfaceLimits: The part of the surface to take into account.

o GetSurface

public virtual GetSurface(		`iSurface`,
		`ioPlane`,
		`oPoints`,
		`oStrips`,
		`oFans`,
		`oPolygons`,
		`oTriangles`)

Retrieves the results associated with a surface.
All the output iterators are allocated by the GetSurface method, and are deleted when the operator is deleted.

Parameters:

iSurface: A surface among the input surfaces.
ioPlane: Retrieves 1 if the surface is planar, 0 otherwise.
oPoints: A pointer to a CATCGMTessPointIter, to retrieve the computed points.
oStrips: A pointer to a CATCGMTessStripeIter, to retrieve the computed triangle strips.
oStrips: A pointer to a CATCGMTessFanIter, to retrieve the computed triangle fans.
oStrips: A pointer to a CATCGMTessPolygonIter, to retrieve the computed polygons.

o Run

public virtual Run(

)

Runs this CATICGMSurfaceTessellator.

o SetStep

public virtual SetStep( iStep)

Defines a finite step for this CATICGMCurveTessellator.

Parameters:

iStep: The Step value.

This object is included in the file: CATICGMSurfaceTessellator.h
If needed, your Imakefile.mk should include the module: CATGMModelInterfaces