Scheme Extensions

List of:	Discussion Topic
Contents:	Kernel

acisoptions:set					Sets the parameters in an acis_options scheme object.
acis_journal:end					Ends the journaling mechanism.
acis_journal:pause					Pauses the journaling mechanism.
acis_journal:resume					Resumes the journaling mechanism after a pause.
acis_journal:set					Sets the parameters for journaling functions.
acis_journal:start					Makes a acis_journal scheme-object.
annotation:assert					Returns an error if the specified annotation does not exist.
annotation:assert-not					Returns an error if the specified annotation DOES exist.
annotation:clear-all					Removes all annotations.
annotation:hook-all					Hooks all annotations.
annotation:inputs					Returns the list of input entities for the given annotation entity.
annotation:member-name					Returns the name of the selected entity as determined by an attached annotation attribute.
annotation:outputs					Returns the list of output entities for the given annotation entity.
annotation:unhook-all					Unhooks all annotations.
arc:center					Gets the center position of a circular curve or edge of an elliptical curve or edge.
arc:end-angle					Gets the end angle of a circular curve or edge or an elliptical curve or edge.
arc:major-axis					Gets the gvector of the major axis of an elliptical curve or edge.
arc:radius					Gets the radius of a circular curve or edge or an elliptical curve or edge.
arc:start-angle					Gets the start angle of a circular curve or edge or an elliptical curve or edge.
body:get-transform					Returns the transform attached to a body.
body?					Determines if a scheme-object is a body.
coedge:types					Prints a table of all coedges in the current part, including their containing entities and pcurve types.
coedge?					Determines if a scheme-object is a coedge.
curve:bs3-eval-arc-3curve					Returns the radius and center of an arc tangent to three co-planar bs3curves. One or two of the curves may degenerate to a point.
curve:bs3-eval-tan-pt					Evaluates the straight line, which is tangent to a planar bs3curve, and passes it through the given point.
curve:circular?					Determines if a scheme-object is a curve:circular.
curve:domain					Determines the domain of an edge's curve.
curve:elliptical?					Determines if a scheme-object is a curve:elliptical.
curve:end-param					Gets the end parameter of an edge or a curve.
curve:end-pos					Gets the end position of an edge or a curve.
curve:end-tan					Gets the end tangent of an edge or a curve.
curve:eval					Evaluates an edge or a curve at the specified parameter and number of derivatives.
curve:eval-curvature					Evaluates the curvature vector of an edge at the specified SPAparameter.
curve:eval-pos					Evaluates an edge or a curve at the specified parameter.
curve:eval-tan					Evaluates the tangent gvector of an edge or a curve at the specified parameter.
curve:from-edge					Creates a curve from an edge entity.
curve:from-tcoedge					Creates a curve from an tcoedge entity.
curve:length					Gets the length of an edge or a curve.
curve:linear?					Determines if a scheme-object is a linear curve.
curve:normal					Gets the normal of a given planar edge or curve.
curve:param					Gets the parameter value at a specified position on an edge or a curve.
curve:param-at-dist					Gets the parameter value of a curve at an arc length distance along the curve.
curve:project-pos					Gets the normal projection of a position onto an edge or curve.
curve:ray-pos					Gets the position on a curve closest to the pick-ray.
curve:start-param					Gets the start parameter of an edge or curve.
curve:start-pos					Gets the start position of an edge or curve.
curve:start-tan					Gets the tangent at the start of an edge or curve.
curve:transform					Modifies a curve or edge by applying a transform.
curve?					Determines if a scheme-object is a curve.
debug:all-modules					Sets the debug level for all modules that have debugging turned on.
debug:file					Sets debug output to be printed to the specified output device.
debug:list-modules					Displays the current debug level for all modules with debugging turned on. Also prints a number of such modules.
debug:module					Sets the debugging level for a module.
derived-tag:string					Returns the string stored in the derived_tag.
dummy-name:add					Adds a dummy naming attribute which can be used to test the annotation callbacks.
edge:bs					Returns the B-spline approximation information (number of control points) for an edge.
edge:circular?					Determines if a scheme-object is a circular-edge.
edge:curve?					Determines if a scheme-object is a curve-edge.
edge:domain					Determines the domain of an edge.
edge:elliptical?					Determines if a scheme-object is an elliptical-edge.
edge:linear?					Determines if a scheme-object is a linear-edge.
edge:min-rad					Returns the minimum radius of curvature of a curve.
edge:project-to-face					Projects (part of) an edge onto a face.
edge:project-to-plane					Projects an edge onto a plane.
edge:reversed?					Determines if the direction of an edge is reversed relative to a face.
edge:spline?					Determines if a scheme-object is a spline-edge.
edge:type					Determines the type of an edge.
edge:types					Prints a table of all edges in the current part, including their containing entities and curve types.
edge?					Determines if a scheme-object is an edge.
eelist:add					Adds an entity to an EE_LIST.
eelist:entities					Returns a list of the entities in an EE_LIST.
eelist:new					Creates a new EE_LIST entity.
eelist:remove					Removes an entity from an EE_LIST.
entity					Gets an entity from an entity ID number.
entity:annotation-names					Returns the name of the selected entity as determined by an attached annotation attribute.
entity:annotations					Returns the list annotation entities attached to the given entity via an annotation attribute.
entity:attach-derived-tag					Generates an error if the specified annotation does not exist.
entity:coedges					Gets the coedges from an entity or list of entities.
entity:copy					Copies any entity (solid, face, edge, etc.) and all entities attached to it.
entity:copy-contents					Copies lower topology entities from a given entity.
entity:debug					Prints information about the data structure of an entity.
entity:deep-copy					Deep copies an entity (solid, face, edge, etc.) plus all attached entities.
entity:delete					Deletes an entity or list of entities and any attributes attached to those entities.
entity:dindex					Returns the index of the given entity as listed in debug output.
entity:dspindex					Returns faces, edges, tedges, coedges, tcoedges, tvertices or vertices selected by the same index as listed in debug output.
entity:fix-transform					Applies a body transformation to all underlying geometry.
entity:get-id					Returns the id tag from the given entity.
entity:how-connected					Returns an ordered list of entities representing the path from one entity to another.
entity:index					Returns the index of an entity.
entity:loops					Gets a list of all loops of an entity or list of entities.
entity:lose-attribs					Removes selected attributes from an entity and it's subparts.
entity:lumps					Gets a list of all lumps in an entity or list of entities.
entity:move					Transforms an entity or list of entities.
entity:next					Gets the next LUMP, SHELL, FACE, LOOP or COEDGE in an entity list.
entity:owner					Gets the top level owner of an entity.
entity:previous					Gets the previous COEDGE in an entity list.
entity:reflect					Reflects an entity or list of entities.
entity:reset-boxes					Removes and then adds back bounding boxes from the selected body and its subparts (or just the selected entity if it's not a body).
entity:rotate					Rotates an entity or list of entities.
entity:scale					Scales an entity or list of entities uniformly or non-uniformly.
entity:sense					Determines if a scheme-object is a FORWARD.
entity:shells					Gets a list of shell entities from a topological entity or list of entities.
entity:tcoedges					Gets the tcoedges from an entity or list of entities.
entity:tedges					Gets a list of all tedge entities in an entity or list of entities.
entity:transform					Applies a transform to a single entity or list of entities.
entity:tvertices					Gets a list of tvertices from an entity or list of entities.
entity:wires					Gets a list of wires from an entity or list of entities.
entity?					Determines if a scheme-object is an entity.
entray					Creates an entray.
entray:entity					Gets the entity component of an entray.
entray:ray					Gets the ray component of an entray.
entray?					Determines if a scheme-object is an entity-with-ray.
env:load-state					Loads the states of global variables (such as options and tolerances) from the given text file and sets the values to the variables.
env:restored-product-id					Returns the restored product information.
env:restored-units-scale					Returns the restored units scale.
env:save-product-id					Returns the save product information.
env:save-state					Saves the current states of global variables such as options and tolerances into a text file.
env:save-units-scale					Gets the save units scale.
env:set-save-units-scale					Sets the save units scale value in Fileinfo.
env:set-tolerance					Sets the following system tolerances: SPAresabs, SPAresnor, SPAresfit, and SPAresmch.
env:tolerance					Gets a list of system tolerances.
face:bs					Returns the B-spline approximation information for a face.
face:check					Determines if a face contains invalid loops.
face:conical?					Determines if a Scheme object is a conical face.
face:cylinder-axis					Gets the ray along the axis of a cylindrical-face entity.
face:cylinder-radius					Gets the radius of a cylindrical face entity.
face:cylindrical?					Determines if a Scheme object is a cylindrical face.
face:derivtest					Tests face quality by comparing the procedural derivatives with finite difference derivatives up to the 4th derivatives.
face:planar?					Determines if a Scheme object is a planar face.
face:plane-normal					Gets the normal of a planar face.
face:plane-ray					Gets the plane from a planar face as a ray.
face:scar?					Checks the input body or face for scars and returns list (or unspecified if no scars exist).
face:sphere-center					Gets the center position of a spherical face.
face:sphere-radius					Gets the radius of a spherical face.
face:spherical?					Determines if a Scheme object is a spherical face.
face:spline?					Determines if a Scheme object is a face:spline.
face:toroidal?					Determines if a Scheme object is a toroidal face.
face:type					Returns the type of a face.
face:types					Prints a table of all faces in the current part, including their containing entities and surface types.
face?					Determines if a Scheme object is a face.
filter:and					Computes an AND of two or more entity-filters.
filter:apply					Applies a filter to an entity or list of entities.
filter:not					Computes the NOT of an input entity-filter.
filter:or					Computes the OR of two or more entity-filters.
filter:type					Creates a filter entity that selects for the type of an entity.
filter:types					Gets a list of available filter types.
find:angle					Returns the angle between edges. Returns a list of angles if a non-branched wire-body is submitted.
find:bump					Finds the bump associated with the given face or loop.
find:pattern-index					Finds the pattern index associated with a given entity.
graph:add-edge					Adds an edge to a graph.
graph:add-vertex					Adds a vertex to a graph.
graph:adjacent					Returns whether or not two vertices in a graph are connected with an edge.
graph:branch					Returns a subgraph of the given input graph.
graph:component					Creates a new graph from all of the component elements of a given graph specified by one of the component elements.
graph:components					Returns the number of independent components that are in a graph.
graph:connected?					Determines whether or not the specified graph is connected, or all in one component.
graph:copy					Creates a new graph that is a copy of the specified graph.
graph:cut-edge?					Determines whether or not the specified edge is a cutting edge.
graph:cut-edges					Returns all of the cutting edges of a graph.
graph:cut-vertex?					Determines whether or not the specified vertex is a cutting vertex.
graph:cut-vertices					Returns all of the cutting vertices of a graph.
graph:cycle-vertex?					Determines whether or not a given vertex is a cycle vertex.
graph:cycle?					Determines whether or not a graph has a cycle.
graph:degree?					Returns the number of graph vertices that are connected with graph edges to the specified vertex.
graph:edge-entities					Returns a list of model entities associated with the graph edges.
graph:edge-weight					Sets the weight for an edge of a graph.
graph:entities					Returns a list of model entities associated with the graph vertices and edges.
graph:get-order					Returns a number representing the distance a given graph vertex is from the 0 node in the given ordered graph.
graph:intersect					Performs a Boolean intersect operation of two graphs.
graph:is-subset					Returns TRUE if the small graph is a subset of the large graph.
graph:kind					Returns a graph containing the input graph elements that are of the specified kind number and specified kind status.
graph:kind?					Returns whether or not a graph with a given edge is of the specified kind.
graph:kinds?					Returns a list of all the kinds on a vertex or edge.
graph:lightest-path					Returns a graph representing the lightest path between two vertices of a graph.
graph:linear?					Determines whether or not a graph is linear.
graph:negate					Negates an ordered graph.
graph:order-cyclic					Assigns a sequence order to the vertices of a cyclic graph.
graph:order-from					Sets the order of a graph starting at 0 for the specified vertex.
graph:order-with					Sets the order of one graph onto another and rescales the ordering to remove gaps.
graph:set-kind					Specifies the kind type and its on/off value for an edge of the given graph.
graph:shortest-cycle					Returns the shortest cycle graph that includes the specified graph vertex.
graph:shortest-path					Returns the shortest path graph that includes the two specified graph vertices.
graph:show-order					Creates a list of a vertices in a graph and their respective distance from the starting vertex.
graph:split-branches					Decomposes a graph into components that do not have branches.
graph:subset					Creates a subgraph from a given graph using either two integers or a law.
graph:subtract					Performs a Boolean subtract operation of two graphs.
graph:subtract-edges					Subtracts the edges of graph1 from graph2 returning the result.
graph:total-weight					Returns the total weight associated with the edges of a graph.
graph:tree?					Determines whether or not a given graph is a tree structure.
graph:unite					Performs a Boolean unite operation of two graphs.
graph:vertex-entities					Returns a list of entities that are associated with the vertices of a graph.
graph:which-component					Returns the number of the component that a given graph element belongs to.
gvector					Creates a new gvector given coordinates x, y, and z.
gvector:+					Adds two gvectors.
gvector:-					Subtracts two gvectors.
gvector:copy					Creates a gvector by copying an existing gvector.
gvector:cross					Gets the cross product of two gvectors.
gvector:dot					Gets the dot product of two gvector.
gvector:from-to					Creates a gvector between two positions.
gvector:length					Gets the length of a gvector.
gvector:parallel?					Determines if two gvectors are parallel.
gvector:perpendicular?					Determines if two gvectors are perpendicular.
gvector:reverse					Reverses the direction of a gvector.
gvector:scale					Multiplies a gvector by a scalar number to produce a new gvector.
gvector:set!					Sets a gvector's direction given components of x, y, and z.
gvector:set-x!					Sets the x-direction component of a gvector.
gvector:set-y!					Sets the y-direction component of a gvector.
gvector:set-z!					Sets the z-direction component of a gvector.
gvector:transform					Applies a transform to a gvector.
gvector:unitize					Creates a new gvector as a unit vector in the same direction as the specified gvector.
gvector:x					Gets the x-component of a gvector relative to the active coordinate system.
gvector:y					Gets the y-component of a gvector relative to the active coordinate system.
gvector:z					Gets the z-component of a gvector relative to the active coordinate system.
gvector?					Determines if a Scheme object is a gvector.
history:ensure-empty-root-state					Adds empty delta state to the beginning of the history stream so that users can roll to a state with no entities.
history:get-active-state-id					Returns an integer representing the active state.
history:get-default					Returns the default history stream.
history:get-entity-from-id					Returns an ENTITY from a given tag id.
history:validate-streams					Checks all history streams for validity.
is:helix					Determines whether or not the input entity is a helix.
law					Creates a law Scheme data type composed of one or more law functions.
law:bounds					Finds the bounds for a law function.
law:check					Prints out the laws string.
law:count					Gets a count of laws in use.
law:cubic					Creates a cubic law given {a,b,f(a),f(b),f'(a),f'(b)}.
law:derivative					Creates a law object that is the derivative of the given law with respect to the given variable.
law:end					Returns the end of the domain for a law.
law:eval					Evaluates a given law or law expression with the specified input and returns a real or list of reals.
law:eval-par-pos					Evaluates a parameter position.
law:eval-position					Evaluates a given law or law expression with the specified input and returns a position or a par-pos.
law:eval-vector					Evaluates a given law or law expression with the specified input and returns a gvector.
law:hedgehog					Creates visible vector field lines along an edge or wire.
law:inverse					Returns a law that is the inverse of the supplied law.
law:line-line-intersect					Returns TRUE if two lines intersect.
law:linear					Creates a linear law given {a,b,f(a),f(b)}.
law:make-entity					Creates a law entity data type composed of one law function.
law:make-rails					Creates a rail law or a list of rail laws for use by sweeping.
law:nderivative					Computes the numerical derivative of a law function with respect to a given variable, a given number of times.
law:nintegrate					Computes the numerical integral of the given law function over the specified range.
law:nmax					Computes where a law is the maximum over a given interval.
law:nmin					Computes where a law is the minimum over a given interval.
law:nroot					Computes all of the roots of a law function over a given interval.
law:nsolve					Computes all the locations where two laws are equal to one another over a given interval.
law:quintic					Creates a quintic law given {a,b,f(a),f(b),f'(a),f'(b) f''(a) f''(b)}.
law:reset-deriv					Sets the derivative of ith driving variable.
law:set-deriv					Manually sets the derivative of ith driving variable.
law:simplify					Creates a law which is the algebraic simplification of the given law.
law:start					Finds the start of the domain of a law.
law?					Determines whether or not a Scheme object is of the law Scheme data type.
loop:find					Gets loops shared by two entities.
loop:type					Returns the type of given loop.
loop?					Determines if a Scheme object is a loop.
lump?					Determines if a Scheme object is a lump.
mixed-body?					Determines if a Scheme object is a mixed body.
monitor:file					Opens or closes a monitor file, which records the text in the I/O window.
option:get					Gets the value of an option.
option:list					Gets a list of available options and their associated values.
option:reset					Sets the list of available options to their initial values.
option:set					Sets the value of an option.
par-pos					Creates a new uv parametric position given coordinate values u and v.
par-pos:copy					Creates a new par-pos by copying an existing par-pos.
par-pos:distance					Gets the 2D distance between two par-pos.
par-pos:set!					Sets the u and v-components of a par-pos.
par-pos:set-u!					Sets the u-component of a par-pos.
par-pos:set-v!					Sets the v-component of a par-pos.
par-pos:u					Gets the u-component of a par-pos.
par-pos:v					Gets the v-component of a par-pos.
par-pos?					Determines if a Scheme object is a part.
pattern					Constructs a pattern Scheme data type.
pattern:alternating-keep					Creates a new pattern by applying an alternating keep filter to an existing pattern.
pattern:alternating-scale					Creates a new pattern by applying an alternating scale to an existing pattern.
pattern:check					Lists the elements in an entity that have a pattern attached.
pattern:circular?					Determines whether or not a pattern lies on a given circle.
pattern:compose					Creates a new pattern by composing two existing ones.
pattern:concatenate					Creates a new pattern by concatenating two existing ones.
pattern:coords-to-index					For the specified pattern, returns the pattern index associated with the specified pattern coordinates.
pattern:copy					Makes a copy of a pattern.
pattern:cylindrical					Constructs a pattern with cylindrical symmetry.
pattern:cylindrical?					Determines whether or not a pattern lies on a given cylinder.
pattern:edge					Creates a pattern parallel to an edge.
pattern:elliptical					Creates an elliptical pattern.
pattern:from-list					Creates a pattern from a list of positions or transformations.
pattern:get-transform					Returns the requested pattern transform.
pattern:hex					Creates a hexagonal packing pattern.
pattern:hex-cylindrical					Creates a hexagonal pattern with cylindrical symmetry.
pattern:index-to-coords					For the specified pattern, returns the pattern coordinates associated with the specified pattern index.
pattern:keep					Creates a new pattern by applying a keep law to an existing pattern.
pattern:linear					Creates a linear pattern.
pattern:linear-scale					Creates a new pattern by applying a linear scale to an existing pattern.
pattern:make-entity					Creates a pattern entity data type composed of one pattern.
pattern:mirror					Creates a new pattern that is a concatenation of the given pattern with its reflection through a specified plane.
pattern:move-element					Moves a single element within an existing pattern.
pattern:periodic-keep					Creates a new pattern by applying a periodic keep filter to an existing pattern.
pattern:periodic-scale					Creates a new pattern by applying a periodic scale to an existing pattern.
pattern:planar?					Determines whether or not a pattern is parallel to a given plane.
pattern:polar-grid					Creates a polar-grid pattern.
pattern:print-transform					Prints the requested pattern transform to stdout.
pattern:radial					Creates a radial pattern.
pattern:random					Creates a random pattern within the indicated region.
pattern:random-keep					Creates a new pattern by applying a random keep filter to an existing pattern.
pattern:random-offset					Creates a new pattern by adding random offset to an existing pattern.
pattern:random-orient					Creates a new pattern by applying random rotations at each of the pattern sites.
pattern:random-scale					Creates a new pattern by applying a random scale to an existing pattern.
pattern:reflect					Creates a new pattern that is a reflection of the specified one through a given plane.
pattern:remove					Removes all patterns from an entity.
pattern:remove-element					Removes a single element from an existing pattern.
pattern:restore-element					Restores the element specified by coords to an existing pattern.
pattern:scale					Creates a new pattern by applying a scale law to an existing pattern.
pattern:scale-element					Scales a single element of an existing pattern.
pattern:set-root-transf					Creates a new pattern by applying a root transformation to an existing pattern.
pattern:size					Returns the number of elements in the given pattern.
pattern:spherical					Creates a spherical pattern.
pattern:spherical?					Determines whether or not a pattern lies on a given sphere.
pattern:surface					Creates a pattern parallel to a surface.
pattern:transform					Creates a new pattern by applying a transformation to an existing pattern.
pattern:undo-move-element					Undoes a move applied to a single element of an existing pattern.
pattern?					Determines whether or not a Scheme object is of the pattern Scheme data type.
point:position					Computes the position of a point.
point?					Determines if a Scheme object is a point.
position					Creates a new position with coordinates x, y, and z.
position:closest					Gets the position from a list of positions that is closest to a given position.
position:copy					Creates a new position by copying an existing position.
position:distance					Gets the distance between two positions.
position:interpolate					Interpolates a new position based on the weight between two given positions.
position:offset					Creates a new position offset from a given position.
position:project-to-line					Gets the projection of a position on to a line.
position:project-to-plane					Gets the projection of a position onto a plane.
position:set!					Sets the x, y, and z-components of a position.
position:set-x!					Sets the x-component of a position.
position:set-y!					Sets the y-component of a position.
position:set-z!					Sets the z-component of a position.
position:transform					Applies a transform to a position.
position:x					Gets the x-component of a position relative to the active coordinate system.
position:y					Gets the y-component of a position relative to the active coordinate system.
position:z					Gets the z-component of a position relative to the active coordinate system.
position?					Determines if a Scheme object is a position.
ray					Creates a ray given a base position and gvector.
ray:gvector					Gets the gvector component of a ray.
ray:position					Gets the position component of a ray.
ray:queue					Adds a ray to the ray queue.
ray:valid?					Tests whether a ray is valid.
ray?					Determines if a Scheme object is a ray.
read-ray					Reads a ray from the ray queue or from a pick-event.
shell?					Determines if a Scheme object is a shell.
solid?					Determines if a Scheme object is a solid.
surface:domain					Determines the domain of a face's surface.
surface:eval					Evaluates a position on a parametric surface.
surface:eval-curvatures					Evaluates a the principal curvatures and directions at the given uv on the surface
surface:eval-normal					Gets the normal of a surface at the specified parameter values.
surface:eval-pos					Gets the position on a surface at the specified parameter values.
surface:from-face					Creates a surface from a face.
surface:point-perp					Reverse evaluates a position on a parametric surface.
surface:range					Returns the parameter range of a surface.
surface?					Determines if a Scheme entity is a surface.
test:deep-copy					Tests the deep copy functionality for improper sharing.
test:equal					Compares two arguments for equality.
test:greater-than					Compares two real numbers.
test:less-than					Compares two real numbers.
test:performance					Runs the performance test(s).
text:font					Gets a text entity's font.
text:location					Gets a text entity's location.
text:set-font					Sets a text entity's font.
text:set-location					Sets a text entity's location.
text:set-size					Sets a text entity's font size in points.
text:set-string					Sets a text entity's string.
text:size					Gets a text entity's font size in points.
text:string					Gets a text entity's string.
text?					Determines if a Scheme object is a text entity.
timer:end					Stops the timer.
timer:get-time					Calculates and returns the amount of time elapsed since timer:start was executed.
timer:show-time					Calculates and returns the amount of time elapsed since the timer:start command was executed. This is most often used to measure performance.
timer:start					Starts an internal clock/timer. The timer: commands are most often used to measure performance of some command or series of commands.
transform:axes					Creates a transform that takes an object from model space to the space defined by the new origin and axes.
transform:compose					Concatenates two transforms.
transform:copy					Copies a transform.
transform:identity					Creates an identity transform.
transform:inverse					Creates an inverse transform.
transform:print					Prints a transform.
transform:reflection					Creates a transform to mirror an object through an axis.
transform:rotation					Creates a transform to rotate an object about an axis.
transform:scaling					Creates a scaling transform.
transform:translation					Creates a translation transform.
transform?					Determines if a Scheme object is a transform.
versiontag					Gets the current version tag or creates a new version tag scheme object. Default is the current version.
vertex:position					Gets the position of a vertex.
vertex?					Determines if a Scheme object is a vertex.
wcs					Creates a work coordinate system.
wcs:active					Gets the active work coordinate system.
wcs:from-transform					Creates a work coordinate system given a transform.
wcs:origin					Gets the origin of the active WCS.
wcs:set-active					Sets the active work coordinate system to the specified WCS.
wcs:to-model-transform					Gets the transform of the active WCS to model space.
wcs:to-wcs-transform					Gets the transform from the active WCS to the specified WCS.
wcs:x-axis					Gets the x-direction of the active coordinate system.
wcs:y-axis					Gets the y-direction of the active coordinate system.
wcs:z-axis					Gets the z-direction of the active coordinate system.
wcs?					Determines if a Scheme object is a WCS.
wire-body:planar?					Determines if a Scheme object is a planar wire body.
wire-body?					Determines if a Scheme object is a wire body.
wire:closed?					Determines if a Scheme object is a closed wire.
wire:planar?					Determines if a Scheme object is a planar wire.
wire?					Determines if a Scheme object is a wire.

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