National and University Library, Ljubljana (NUK)
-
Combining constructive and numerical approach for geometric constraint solvingPodgorelec, David ; Žalik, BorutIn the report, we present some ideas how to extend the drawing scope and to improve the interactivity and f1exibility of constraint-based geometric modellers and drawing systems. These ideas were ... employed in the experimental 2D drawing system GemmaCAD 2D. Its main feature is the early exit for constraint problems solvable by an insertion of redundant constraints. This task is based on simple rules for solving triangles and calculation of sums of adjacent angles, and some more powerful rules for solving quadrangies. If a problem cannot be solved by local propagation after insertion of redundant distances and angles, it is partitioned into independent subproblems, and these are then solved by the well-known numerical optimisation method BFGS. We propose some ideas addressing partition and preparation of equations. All constraints are presented by the point coordinates. only. This transformation usually improves convergence, enables simple calculation of derivatives required by BFGS in symbolic form, and allows us to extend the constraint set by new constraint types.Type of material - treatise, studyPublication and manufacture - Maribor : Faculty of Electrical Engineering and Computer Science, Laboratory for geometric modelling and multimedia algorithms, 2004Language - englishCOBISS.SI-ID - 13071894
![loading ... loading ...](themes/default/img/ajax-loading.gif)
Shelf entry
Permalink
- URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year | Impact factor | Edition | Category | Classification | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Select the library membership card:
If the library membership card is not in the list,
add a new one.
DRS, in which the journal is indexed
Database name | Field | Year |
---|
Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
---|---|
Podgorelec, David | 15671 |
Žalik, Borut | 06671 |
Source: Personal bibliographies
and: SICRIS
Select pickup location:
Material pickup by post
Delivery address:
Address is missing from the member's data.
The address retrieval service is currently unavailable, please try again.
By clicking the "OK" button, you will confirm the pickup location selected above and complete the reservation process.
By clicking the "OK" button, you will confirm the above pickup location and delivery address, and complete the reservation process.
By clicking the "OK" button, you will confirm the address selected above and complete the reservation process.
Notification
Automatic login and reservation service currently not available. You can reserve the material on the Biblos portal or try again here later.
Subject headings in COBISS General List of Subject Headings
Select pickup location
The material from the parent unit is free. If the material is delivered to the pickup location from another unit, the library may charge you for this service.
Pickup location | Material status | Reservation |
---|
Reservation in progress
Please wait a moment.
Reservation was successful.
Reservation failed.
Reservation...
Membership card:
Pickup location:
Naročanje gradiva za izposojo v čitalnice
Naročanje kopij člankov
Urnik dostave gradiva z oznako DS v signaturi