Copy type arbitrary Undo/Redo method for collaborative cad system
A computer-aided system design technology, applied in computing, multi-programming devices, instruments, etc., can solve problems such as not supporting AnyUndo/Redo operations
Inactive Publication Date: 2013-11-20
WUHAN UNIV
View PDF2 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0011] However, the current research on Undo / Redo in 3D computer-aided design system is mainly carried out in a stand-alone environment, and does not support Any Undo / Redo operation
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0061] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the present invention is not limited.
[0062] The technical scheme adopted in the present invention is: any Undo / Redo method in a kind of copy type cooperative computer-aided design system, comprises the following steps:
[0063] Step 1: After station Si issues the Undo command, locate the modeling operation O to be Undoed in the historical operation records of station Si according to the station number and operation sequence number of station Si, and according to the execution sequence number contained in the positioned modeling operation O, in The model state S when the modeling operation O is executed is obtained from the model state flow, and the dependent operation set DS(O) is obtained on the site Si, where the site Si is a site in the remote collaborative site, and the dependent operation set DS(O) is Refers to: if the modeling operat...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a copy type arbitrary Undo / Redo method for a collaborative cad system. When the station receives an Undo order, positioning the molding operation O in the local operation history record and judging whether the modeling operation O is revoked by the concurrence Undo or not. If is not Undo, setting the O and the operation cluster depended by the O as invalid, obtaining modeling state in the modeling state record that O operates, conducting the operation that is still valid after modeling operation O, adding the component of USV of O, which is corresponding to Undo generating station, by 1. When the synchronous station receives a Redo order, positioning the O operation that needs Redo locally, judging whether the O is the concurrence Undo object. If yes, waiting until each synchronous station agrees the Redo operation O; if not, executing O based on the current modeling state. The method provided by the invention can be used in a multi-user synchronous editing environment, can conduct Undo and Redo at any time and any selecting operation under the premise of keeping user operating will, and keep result consistency on each station.
Description
technical field [0001] The invention belongs to the field of Computer Supported Cooperative Work (CSCW), in particular to an arbitrary Undo / Redo method in a replicated collaborative computer-aided design system. [0002] Background technique [0003] In the replicated collaborative computer-aided design system, each user needs to cooperate to complete common design tasks. When users face a new system, they often need to familiarize themselves with the various functions provided by the system through step-by-step tentative operations. , the Undo / Redo function allows users to try it with confidence. At the same time, in a multi-user environment, the influence of a user's wrong operation is larger, so the Undo / Redo function is still very important. The research on the Undo / Redo problem mainly focuses on two aspects, the Undo / Redo model and the research on the prototype system based on the Undo / Redo model. [0004] Before the concept of CSCW was proposed, the research on Undo...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F9/46
Inventor 何发智程媛张德军蔡贤涛
Owner WUHAN UNIV