For the latest information, freeware downloads, patches, examples and
open
source of 'StCAD', visit:
http://www.*-*-*.com/

                StCAD
     3D CAD Framework for Smalltalk
                  by
             Aik-Siong Koh

What is new in this release?
The symbolic function parser allows the user to define functions of
time,
displacements and velocities for forces and torques in all three
components or
along connecting markers. Example formulas include: linear, hardening,
softening springs; linear damper, aerodynamic forces, beam, bushing,
inverse
square law and van der pol equation. XY plots can be zoomed and set to
equal scales.

What is 'StCAD'?
'StCAD' is a basic 3D CAD framework in Smalltalk (VisualWorks 5i.x). It
extends the GF/ST 2D drawing framework into 3D. It also include 'StGEO'
which is the 3D geometric domain and 'StMath' which provides the
mathematical support for 3D CAD operations. 'StMath' is also suitable
for engineering, scientific and business computing. The parcels are open

source using Lesser GNU Public License. Users can use these parcels with

other private software to create 3D applications like motion simulation,

finite element analysis, CAD, scientific visualization, etc.

'StCAD' allows users to create and manipulate assemblies, which are
collections of 3D parts. The parts are 3D solids, which can be connected

by joints, constraints, contacts, actuators, springs, dampers or forces.

The parts and connections define the structure or mechanism that the
assembly is meant to represent. Animation is possible, if the user can
provide time series of position and orientation data for the parts.

Users can also obtain output data in the form of plots and tables. XY
plots can be zoomed and set to equal scales. Data series available
include linear and angular displacements, velocities, accelerations
and other user generated data.