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Base principles of LEKO are the same as of any instrumental system of software
development:
- integrated environment;
- specialized program language;
- built-in functions;
- visualization of calculation and analytical control;
- user-friendly integrated environment.
integrated environment
Integrated environment of software development includes all the necessary
elements and provides disks and provides quick and convenient work with
necessary functions. If you know the possibilities of system, you need not any
additional service.
specialized program language
In order to find optimal solutions for programming in special fields, as a
rule, special object-oriented program languages are being developed. These
languages are of the same characteristics as program languages, but they use
terminus of the field. As it was mentioned above, for LEKO specialized
original language of geometrical constructions, completed with effective
syntax and semantic rules referred to recording of operators, qualificators,
identificators' names, generating. The language is based on the method of
point destination of geometrical objects via calculation formulas. The
language includes elements of object-oriented approach, providing the user
with compact and clear record of geometric constructions.
built-in functions
To facilitate the records and to multiple the possibilities of program
language, it is completed with the set of built-in functions, which formally
are not elements of program language, but are being used as these elements.
Almost all functions can be realized via main elements of the language
(point calculation). Built-in functions allow to simplify algorithm recording
and to improve its readability and clearness.
visualization of calculation and analytical control
Visualization of calculations, which is graphic performance of final and
intermediate calculation results, means both the goal of development
and additional means of mastering the program. The system is provided with
visual control of development, which allows to review all geometrical objects
with any specification degree, and analytical control of designing, which
allows to review the consequence of geometrical objects definition, its
coordinates and other parameters.
user-friendly integrated environment
Friendliness is one of the main characteristics of integrated environment. It
includes ergonomic requirements, convenience and simplicity in work. LEKO
provides you with option of commands via menu and unification of included
systems. Low-leveled language allows to record any changes and constructions,
that makes the system unlimited in use.
The similarity of algorithms of apparel models development and software gives
us the possibility to preview the effect of putting the system into operation
as well as father development. Putting the system into operation at several
enterprises allows to rise up to new level; collective developing of design
methods instead of work of highly-qualified masters, who are so rare.
Calculating-analytical methods of construction, geometric transformations,
object-oriented approach, completed with due software, can subsequently
improve quality of modeler's work.
LEKO gives the modeler new possibilities. You can use it traditionally,
repeating manually-made constructions. But much more considerable effect you
shell get if you change "manual" pattern making at following directions:
- simplifying design process due to reduce of intermediate constructions (i.e.
work with rectangular net), joining several operations into one (i.e. search
of arc intersection) and change to more general transformations (no
intermediate lines or arcs are required; they all are replaced with commands
"mark off", "revolve" etc.);
- increase of construction preciseness due to use of full calculation formulas
instead of approximation coefficients, use of precious table of measurements;
- new design possibilities (splines, angular values trigonometry, built-in
functions, i.e. symmetry, transfer, cone division, "flexible rule" method
etc.);
- development of construction according to proportions, use of measurement
database, that results in automate patterns grading - for every size/height;
- creating of simple, easily changed methods, parameterization of designing
models, creating of database of construction methods and models;
- taking into account sewing technology and technical characteristics of
fabric at construction level ("reduce" of segments cut on the bias, previewing
the further stretching; setting maximal coefficients of fabric fitting etc.).
With LEKO, even main sewing concepts can be changed - for example, the concept
of paper pattern as a basic thing becomes useless. The main in LEKO is the
method of construction; the modeler, by means of inputting different
allowances (seam/hem, model etc.) and varying construction parameters, can get
different variants of the base pattern to be technically designed.
Usually, the modeler has to manually adjust pattern segments, check lengths,
conjunctions (angles), that is time-consuming. In LEKO the modeler inputs
conditions of conjunction of different details at method level. You do not
need to check these conjunctions any more: all the conditions are kept for any
size/height, allowances and other parameters.
There are two stages of work with LEKO:
- to write the consequence of construction, that guarantees the adjustment of
all segments of patterns (you can do it independently, without having a
life-size pattern);
- to choose seam/hem allowances, line forms, detail sizes according to
requirements of designer as well as technology (this stage claims for more
quantity of patterns to choose to optimal one).
When the modeler works manually, it complicates the process of changing the
patterns. With LEKO, the modeler just conceptually describes interdependencies
of pattern sectors.
Making designs is an art, but what differs it from drawing is strictly defined
rules. You can have the concrete correlations for nearly every constructive
moment (lengths, angles and form in general). Usually, these are trigonometric
correlations, which are in practice taken as correlations of lengths,
proportions, "smoothness" of lines. All these correlations are included in all
calculation methods of pattern making, but sometimes they are hidden behind
the method of construction and previously calculated coefficients.
Powerful calculating possibilities of LEKO will enable you to calculate formulas
and to replace approximate formulas based on pre-calculated coefficients with
full calculation formulas. The user can get these extremely precious formulas
from interdependencies (during the process of pattern making and stitch lines
layout). For this approach, you should refresh your knowledge of trigonometry,
correlations of triangle sides, planimetry. It could disappoint you, but
please be sure:
all the correlations will be made independently of designer's wish, but the
user can choose the way how to get it - through calculation of formulas or by
means of selecting and control sewing of samples. There is no possibility that
one day the laws of trigonometry and planimetry stop their existence.
Use the following laws of trigonometry, and you reduce algorithm recording and
make the program clearer:
- transferring linear values into angular values and vise versa;
- revolves;
- correlations of right triangle;
- linear functions.
Design making in LEKO does not claims for concrete figures. The designer can
take measurements from database: it is no necessary for him/her to know
measurements of concrete person. The designer can also does not know segment
lengths and curve-line portions of patterns, which is being used in
calculation formulas. The designer's task is to define consequence of these
values and concrete type of dependence (i.e. to create the side of front
part, using the length of the side of back part), which will be computerized.
We have found, during our interviewing designers, that they are still not able
to use the computer in their work - for psychological reason. It is due to:
- difficulties in independent formalization of modeler's knowledge and
experience;
- absence of computer-oriented methods;
- absence of any mathematic methods developed for modeler's work.
It is considered - for unknown reason - that it is impossible to use
mathematics for pattern drafting. It may be true for pattern making in
general, but false for particular conjunctions. When the designer adjusts
model conjunctions, he/she often tries to manually get a dependence obviously
described via mathematic formula, and sometimes these formulas are rather
simple.
Our experience shows that LEKO allows considerable reduce the designing period
of new models and minimize the developing period of new models. You shall
quickly get models of highest quality, if you have methods of construction
for particular conjunctions.
VILAR SOFT Ltd. develops LEKO-oriented construction methods. When we deliver
our system, we also offer our customers ready construction methods for
different assortment (individual methods, methods developed for fashion
houses, CMEA UCM (Unified Construction Method) and, of course, methods worked
out by specialists of VILAR SOFT Ltd.). Detailed description of the system
(containing examples and recommendations) will allow you to familiarize
yourself with basic rules and principles of the system within several days.
The main advantage of LEKO is that it is not only technical system which is
able to solve design tasks, but also new principles of work.
LEKO has been developed since 1989 by specialists of VILAR SOFT Ltd., which is
software developer. LEKO is usable both autonomously and integrated with marker
making CAD.
For more information, please, contact us: leko@lekala.info
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