Overall tolerance for the created brep solid. Defaults to nil. Note that a value of nil indicates for SMLib to use value of 1.0e-05 of the longest diagonal length of the brep.

Defaults to nil. Specify this if you want this brep to be a clone of an existing brep. (note - this uses a shared underlying brep object, it does not make a copy)

The RGB color of this object as imported from an external format (e.g. IGES) or as specified in :display-controls. Defaults to the foreground color specified in *colors-default*. This message should not normally be overridden in user application code.

These indicate the colors for the breps produced by (the face-breps). If the number of face-breps exceeds the length of this list, the colors will be repeated in order. Defaults to a list with keys:

• :green
• :red
• :blue
• :purple-dark
• :violet
• :cyan.

Indicates whether the object should effectively be a hidden-object even if specified in :objects. Default is nil.

Synonym for the layer.

Points to a pre-existing image file to be displayed instead of actual geometry for this object. Defaults to nil

The primary IGES-compatible level (layer) on which this object resides. Defaults to the first of the levels. This slot can be overridden in user code to specify a new layer which will be written out when this object is exported with the IGES output-format.

The IGES-compatible levels (layers) on which this object resides. GDL does not currently support writing out multiple levels (layers) through the IGES writer ; only the first of these will be output if the object is exported with the IGES output-format (please contact Genworks if you need all levels (layers) to be written out).

This is synonymous with the orientation.

If non-nil, this function gets invoked when the user clicks the object in graphics front-ends which may or may not support this functionality (see viewport-html-div).

The root-level node in this object's ``tree'' (instance hierarchy).

All objects from the :objects specification, including elements of sequences as flat lists. Any children which throw errors come back as a plist with error information

Determines how the name of objects of this type will be printed in most places. This defaults to the name-for-display (generally the part's name as specified in its parent), followed by an index number if the part is an element of a sequence.

This controls tessellation for this brep. The keys are as follows:

• :min-number-of-segments
• :max-3d-edge-factor
• :min-parametric-ratio
• :max-chord-height
• :max-angle-degrees
• :min-3d-edge
• :min-edge-ratio-uv
• :max-aspect-ratio

   (list 
       :min-number-of-segments *tess-min-number-of-segments*
       :max-3d-edge-factor *tess-max-3d-edge-factor*
       :min-parametric-ratio *tess-min-parametric-ratio*
       :max-chord-height *tess-max-chord-height*
       :max-angle-degrees *tess-max-angle-degrees*
       :min-3d-edge *tess-min-3d-edge*
       :min-edge-ratio-uv *tess-min-edge-ratio-uv*
       :max-aspect-ratio *tess-max-aspect-ratio*)

Additional objects to display in Tatu tree. Typically this would be a subset of hidden-children. Defaults to NIL.

The density per unit volume of the brep. Defaults to 1

Determines whether the isoparametric curves of each face of the brep are used for wireframe display. The default is T.

Determines whether the tessellation grid-lines of the brep are used for wireframe display. The default is NIL.

The number of isoparametric curves to be displayed in each direction. This value comes from the value of :isos on the display-controls if that exists, and defaults to *isos-default* otherwise.

Used for tessellations. Computed from (the max-extent) and (the max-3d-edge-factor). WARNING: Modify this value at your peril. Small values can cause intractable tessellations. It is better to tweak max-3d-edge-factor to a small value like 0.1, as this will be taken relative to the max-extent of the brep.

Used for tessellations. Default comes from (the tessellation-parameters).

Used for tessellations. Default comes from (the tessellation-parameters).

Used for tessellations. Default comes from (the tessellation-parameters).

Used for tessellations. Default comes from (the tessellation-parameters).

Used for tessellations. Default comes from (the tessellation-parameters).

Used for tessellations. Default comes from (the tessellation-parameters).

Used for tessellations. Default comes from (the tessellation-parameters).

Used for tessellations. Default comes from (the tessellation-parameters).

Smooth results for poly-brep? Defaults to t.

Indicates in global coordinates where the center of the reference box of this object should be located.

May contain keywords and values indicating display characteristics for this object. The following keywords are recognized currently:

:color

color keyword from the *color-table* parameter, or an HTML-style hexidecimal RGB string value, e.g. "#FFFFFF" for pure white. Defaults to :black.

:line-thickness

an integer, defaulting to 1, indicating relative line thickness for wireframe representations of this object.

:dash-pattern

(currently PDF/PNG/JPEG only). This is a list of two or three numbers which indicate the length, in pixels, of the dashes and blank spaces in a dashed line. The optional third number indicates how far into the line or curve to start the dash pattern.

Z-axis dimension of the reference box. Defaults to zero.

Y-axis dimension of the reference box. Defaults to zero.

Indicates the absolute Rotation Matrix used to create the coordinate system of this object. This matrix is given in absolute terms (i.e. with respect to the root's orientation), and is generally created with the alignment function. It should be an orthonormal matrix, meaning each row is a vector with a magnitude of one (1.0).

X-axis dimension of the reference box. Defaults to zero.

This is the actual tolerance stored in the SMLib object.

The left front bottom and right rear top corners, in global coordinates, of the rectangular volume bounding the tree of geometric objects rooted at this object.

The left front bottom and right rear top corners, in global coordinates, of the rectangular volume bounding this geometric object.

flag:

-- for debug testing only Plist with :min-x :max-x :min-y :max-y :min-z :max-z. Returns the extreme points of the bounding-box of the brep in each direction. This will be updated to return points on the brep itself, not necessarily the bounding box.

. Contains triangle and connectivity data for the tessellation of this brep. Exact supported format will be documented here when ready.

The composed edges contained within this brep, this is valid just if the brep does not contain holes

The Edges contained within this brep aranged clockwise or anticlockwise, this is valid just if the brep does not contain holes

This brep represented as a Polygonal Brep

The Edges contained within this brep.

One brep for each face in the parent brep, containing only that face.

The Faces contained within this brep.

The Regions contained within this brep.

The Shells contained within this brep.

The Vertices contained within this brep.

Area covered by the faces of the brep.

keyword arguments:

tolerance Controls how precisely the properties are computed, Default Value: (the adaptive-tolerance)

e. 3D Point). Returns the Area Moments of Inertia of the brep.

keyword arguments:

tolerance Controls how precisely the properties are computed, Default Value: (the adaptive-tolerance)

e. 3D Point). Returns the Area Products of Inertia of the brep.

keyword arguments:

tolerance Controls how precisely the properties are computed, Default Value: (the adaptive-tolerance)

e. 3D Point). Returns the Area Second Moment About Coordinate Axii of the brep.

keyword arguments:

tolerance Controls how precisely the properties are computed, Default Value: (the adaptive-tolerance)

e. 3D Point). Returns the Area Static Moments of the brep.

keyword arguments:

tolerance Controls how precisely the properties are computed, Default Value: (the adaptive-tolerance)

This function performs an intersection between this brep and another brep. The function returns a NIL value if no intersection is found and T if a intersection is found.

arguments:

other-brep GDL Brep

The brep with which to intersect

keyword arguments:

tolerance Number, Controls how precisely the intersection is computed, Default Value: (the adaptive-tolerance)

angle-tolerance Number, in radians, Default Value: (radians-to-degrees *angle-tolerance-radians-default*)

The angle tolerance for intersection

Center of gravity of the mass of the brep.

keyword arguments:

tolerance Controls how precisely the properties are computed, Default Value: (the adaptive-tolerance)

Returns t or nil depending on whether the point given is within the boundary of the brep (including faces).

arguments:

point Point to check for

Mass represented by the brep, according to the density.

keyword arguments:

tolerance Controls how precisely the properties are computed, Default Value: (the adaptive-tolerance)

Returns the moments of the brep. The plist contains keys: :area-static-moments, :area-moments-of-inertia,

area-products-of-inertia:

:area-second-moment-about-coordinate-axii, :volume-static-moments,

volume-moments-of-inertia:

:volume-products-of-inertia, and :volume-second-moment-about-coordinate-axii.

keyword arguments:

tolerance Controls how precisely the properties are computed, Default Value: (the adaptive-tolerance)

Returns the area, volume, mass, and moments for the brep. The moments are labeled as: :area-static-moments, :area-moments-of-inertia,

area-products-of-inertia:

:area-second-moment-about-coordinate-axii, :volume-static-moments,

volume-moments-of-inertia:

:volume-products-of-inertia, and :volume-second-moment-about-coordinate-axii.

keyword arguments:

tolerance Controls how precisely the properties are computed, Default Value: (the adaptive-tolerance)

Returns the area, volume, mass, and moments for the brep. The moments are labeled as: :area-static-moments, :area-moments-of-inertia,

area-products-of-inertia:

:area-second-moment-about-coordinate-axii, :volume-static-moments,

volume-moments-of-inertia:

:volume-products-of-inertia, and :volume-second-moment-about-coordinate-axii.

keyword arguments:

tolerance Controls how precisely the properties are computed, Default Value: (the adaptive-tolerance)

Returns the approximate area, volume, and barycenter (center of mass) for the brep. These are computed with tessellation techniques, which may be less precise than the analytic techniques used in precise-properties, but should be faster to compute and exhibit more stability.

keyword arguments:

edge-tess-tolerance Controls how precisely the properties are computed with respect to edge tessellation, Default Value: (the adaptive-tolerance)

Contains tessellation data for the brep based on the values of the keyword args. This is used to produce the value of (the triangle-data).

keyword arguments:

min-number-of-segments nil, Default Value: (the min-number-of-segments)

max-3d-edge nil, Default Value: (the max-3d-edge)

min-parametric-ratio nil, Default Value: (the min-parametric-ratio)

max-chord-height nil, Default Value: (the max-chord-height)

max-angle-degrees nil, Default Value: (the max-angle-degrees)

min-3d-edge nil, Default Value: (the min-3d-edge)

min-edge-ratio-uv nil, Default Value: (the min-edge-ratio-uv)

max-aspect-ratio nil, Default Value: (the max-aspect-ratio)

in-memory? nil, Default Value: t

Volume enclosed by the brep.

keyword arguments:

tolerance Controls how precisely the properties are computed, Default Value: (the adaptive-tolerance)

e. 3D Point). Returns the Volume Moments of Inertia of the brep.

keyword arguments:

tolerance Controls how precisely the properties are computed, Default Value: (the adaptive-tolerance)

e. 3D Point). Returns the Volume Products of Inertia of the brep.

keyword arguments:

tolerance Controls how precisely the properties are computed, Default Value: (the adaptive-tolerance)

e. 3D Point). Returns the Volume Second Moment about Coordinate Axii of the brep.

keyword arguments:

tolerance Controls how precisely the properties are computed, Default Value: (the adaptive-tolerance)

e. 3D Point). Returns the Volume Static Moments of the brep.

keyword arguments:

tolerance Controls how precisely the properties are computed, Default Value: (the adaptive-tolerance)