Select Category: Polylines and regions Geometry primitives Curve geometry Construction geometry DXF input and output Meshes Sheet composition Line types and colours Drawing model Solid modelling Assemblies and viewing

Polylines and regions

geom.Polyline	A polyline of straight segments and circular arcs, lying in a plane.
geom.Spline	A smooth curve: a NURBS, drawn through points or given by its control points.
geom.Region	A closed area of a plane, an outline with holes in it.
geom.Path	A path of straight segments, circular arcs and splines in three dimensions.
geom.UCS	A user coordinate system: an origin, an x axis and a normal, defining a plane with coordinates of its own.
geom.text	The outlines of text, as regions.

Geometry primitives

geom.signedarea	Signed area of a simple polygon.
geom.bbox	Axis-aligned bounding box of a set of points.
geom.centroid	Area centroid of a simple polygon.
geom.transform	Apply a planar transformation to a set of points.
geom.isrectilinear	True when every edge of a polygon is parallel to an axis.
geom.offset	Offset a rectilinear polygon inward or outward.
geom.largestrect	Largest axis-aligned rectangle inscribed in a rectilinear polygon.
geom.hatchlines	The line segments that fill a boundary with a hatch pattern.

Curve geometry

geom.curvature	Signed curvature of a sampled planar curve.
geom.curvesample	Sample a parametric curve to a stated chordal tolerance.
geom.curveoffset	Equidistant offset of a smooth sampled curve.
geom.selfintersects	Test whether a sampled curve crosses itself.
geom.arclength	Length along a sampled curve.
geom.resample	Respace the points of a curve evenly along its length.
geom.simplify	Remove the points of a curve that carry no shape, within a tolerance.

Construction geometry

geom.intersectlines	Where two lines cross.
geom.intersectcircle	Where a line meets a circle.
geom.intersectcircles	Where two circles meet.
geom.tangentpoints	Where the tangents from a point touch a circle.
geom.fillet	The arc of a given radius tangent to two lines.

DXF input and output

geom.read	Read geom objects from an ASCII DXF file.
geom.write	Write several geom objects to one DXF file.
draw.read	Read a drawing from an ASCII DXF file.

Meshes

polymesh.Mesh	A triangle mesh in millimetres.
polymesh.read	Read a triangle mesh from an STL, OBJ, PLY or 3MF file.

Sheet composition

draw.titleblock	A sheet frame with a title block in its corner.
draw.coordtable	A table of point coordinates, for a shape that cannot be dimensioned.
draw.symbol	The code that stands for a drawing symbol in a text string.

Line types and colours

draw.linetype	Dash patterns of the standard line types.
draw.colour	Convert between colour names, drawing colour numbers and RGB.

Drawing model

draw.Drawing

A two-dimensional drawing in model space.

Solid modelling

solid.Shape	A solid in millimetres, modelled through Open CASCADE.
solid.box	A rectangular block.
solid.wedge	A wedge: a block whose top is smaller than its base.
solid.cylinder	A right circular cylinder.
solid.cone	A right circular cone or truncated cone.
solid.sphere	A sphere.
solid.ellipsoid	An ellipsoid.
solid.torus	A torus, the solid of a ring.
solid.polyhedron	A solid bounded by a closed triangle mesh.
solid.surface	A solid made of a smooth surface through a grid of points.
solid.extrude	A solid extruded from a region.
solid.revolve	A solid of revolution, turned from a region about its own axis.
solid.loft	A solid passing through regions.
solid.sweep	A solid swept by a region along a path.
solid.helix	A coil, swept by a region turning about its own axis as it rises.
solid.read	Read a solid from a STEP file.
solid.threadspec	The dimensions of a metric screw thread, read from its name.
solid.holespec	The dimensions of the hole for a metric screw, read from its thread.

Assemblies and viewing

model.Assembly	Named parts placed together.
model.read	Read an assembly from a STEP or 3MF file.
model.Viewer	A window showing a solid, a triangle mesh or an assembly, in which edges, faces, solids and coordinate systems can be picked, and solids hidden or shown through.