CN101645099A - Graphics primitive conversion system and graphics primitive conversion method - Google Patents

Graphics primitive conversion system and graphics primitive conversion method Download PDF

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Publication number
CN101645099A
CN101645099A CN200810303594A CN200810303594A CN101645099A CN 101645099 A CN101645099 A CN 101645099A CN 200810303594 A CN200810303594 A CN 200810303594A CN 200810303594 A CN200810303594 A CN 200810303594A CN 101645099 A CN101645099 A CN 101645099A
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China
Prior art keywords
pel
general
line
circular arc
module
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Pending
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CN200810303594A
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Chinese (zh)
Inventor
谢玉泉
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Priority to CN200810303594A priority Critical patent/CN101645099A/en
Publication of CN101645099A publication Critical patent/CN101645099A/en
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Abstract

The invention provides a graphics primitive conversion system which comprises a setting module, a receiving module, a screening module, a judging module and a conversion module, wherein the setting module is used for setting cutting methods of various types of non-universal graphics primitives; the receiving module is used for receiving a mould design figure file from a database and obtaining thegraphics primitives from the mould design figure file; the screening module is used for filtering out universal graphics primitives and text graphics primitives from the obtained graphics primitives according to the property information of each graphics primitive so as to obtain the non-universal graphics primitives required to be converted; the judging module is used for determining the types ofeach non-universal graphics primitive; the conversion module is used for cutting the non-universal graphics primitives into a plurality of sub graphics primitives according to corresponding cutting methods and cutting precisions, respectively solving approximation arcs of each arc in the obtained sub graphics primitives and replacing corresponding arcs in the sub graphics primitives with the approximation arcs so as to obtain the universal graphics primitives corresponding to each non-universal graphics primitive. The invention can quickly convert the non-universal graphics primitives into theuniversal graphics primitives according to the cutting methods and the cutting precisions set by a user.

Description

Pel converting system and method
Technical field
The present invention relates to a kind of CAD aided design system and method, especially about a kind of pel converting system and method.
Background technology
Element figure among the AutoCAD mainly comprises graph primitive and literal pel.Graph primitive comprises: line segment, polyline, circle, circular arc, cloud line, SPL, ellipse, elliptic arc etc.The literal pel comprises literal.Graph primitive can be divided into two classes again: general pel and non-general pel.General pel refers to and can directly be converted to the pel that other machine can be discerned and use, for example line segment, circle, circular arc.Non-general pel refers to and can not directly be converted to the pel that other machine can be discerned and use, for example polyline, cloud line, SPL, ellipse, elliptic arc.
When relating to the graph data transplanting, such as figure is converted to numerical control (Numerical Control, NC) code inputs to board, when making board directly cut out position, needed hole, just need earlier non-general pel is converted to general pel according to the NC code of importing.At present, non-general pel is converted to general pel neither one unified method,, usually depends on mould designer's artificial judgement particularly for SPL, ellipse, elliptic arc in the non-general pel.
Summary of the invention
In view of above content, be necessary to provide a kind of pel converting system, non-general pel can be converted to general pel.
In addition, also be necessary to provide a kind of pel conversion method, non-general pel can be converted to general pel.
The invention provides a kind of pel converting system, run on main frame.This system comprises: module is set, is used to be provided with the dividing method of the non-general pel of all kinds, or dividing method and segmentation precision; Receiver module is used for receiving mould design figure file from database, and obtains the pel in this mould design figure file; Screen module, be used for filtering out the general pel and the literal pel of the pel that gets access to, needing to obtain the non-general pel of conversion according to the attribute information of each pel; Judge module is used for determining the type of each non-general pel; And modular converter, be used for each non-general pel being divided into a plurality of subgraph unit respectively according to corresponding dividing method and segmentation precision, and ask for respectively and approach circular arc cutting apart each camber line in the subgraph unit that obtains, to approach the corresponding camber line in the circular arc replacement subgraph unit, to obtain general pel corresponding to each non-general pel.
The present invention also provides a kind of pel conversion method, runs on main frame.This method comprises: the dividing method of the non-general pel of all kinds (A) is set, or dividing method and segmentation precision; (B) receive mould design figure file from database, and obtain the pel in this mould design figure file; (C) filter out general pel and literal pel in the pel that gets access to according to the attribute information of each pel, needing to obtain the non-general pel of conversion; (D) determine the type of each non-general pel; And (E) each non-general pel is divided into a plurality of subgraph unit respectively according to corresponding dividing method and segmentation precision, and ask for respectively and approach circular arc cutting apart each camber line in the subgraph unit that obtains, to approach the corresponding camber line in the circular arc replacement subgraph unit, to obtain general pel corresponding to each non-general pel.
Compared to prior art, pel converting system provided by the invention and method can be converted to general pel with non-general pel apace according to dividing method and the segmentation precision that the user is provided with.
Description of drawings
Fig. 1 is the hardware structure figure of pel converting system of the present invention preferred embodiment.
Fig. 2 is the functional block diagram of the pel converting system in Fig. 1 main frame.
Fig. 3 is the process flow diagram of pel conversion method of the present invention preferred embodiment.
The synoptic diagram of the general pel of Fig. 4 right and wrong.
Embodiment
Understand for convenient, the term that occurs herein be defined as follows:
Polyline: by at least two line segments (as pel A among Fig. 4), or the pel of forming by at least one line segment and at least one circular arc.
Cloud line: by the be connected pel (as pel B among Fig. 4) of the cloud form formed of plurality of sections camber line.
SPL: SPL is meant given one group of reference mark and obtains a curve that the general shape of curve is controlled by these points.
As shown in Figure 1, be the hardware structure figure of pel converting system of the present invention preferred embodiment.This system comprises: main frame 1, display 2, keyboard 3, mouse 4 and database 5.Display 2, keyboard 3, mouse 4 and database 5 link to each other with main frame 1 respectively.This main frame 1 comprises pel converting system 10, is used for the non-general pel of mould design figure file is converted to general pel.
Display 2 can be any display device, and the user is provided with parameter, input operation order by keyboard 3 or mouse 4, and display 2 shows changes the general pel that obtains after preceding non-general pel and the conversion.
Database 5 is used to store original mould designed graphic document and relevant information thereof, the attribute information that comprises each pel of mould design figure file, and each non-general pel is converted to mould design figure file and the relevant information thereof that obtains behind the general pel in the storage original mould designed graphic document.Database 5 can be built in main frame 1, also can be external in main frame 1.In the present embodiment, being external in main frame 1 with database 5 is that example describes.
As shown in Figure 2, be the functional block diagram of the pel converting system 10 in Fig. 1 main frame 1.This pel converting system 10 comprises module 100, receiver module 110, screening module 120, judge module 130, modular converter 140 and storage module 150 is set.Described each module is one section main frame program of finishing specific function.
Dividing method and segmentation precision that module 100 is used to be provided with the non-general pel of all kinds are set.Described dividing method can be the mathematical method of end points split plot design, average split plot design, recurrence split plot design or other any adaptation.Described segmentation precision is meant the length of the minimum camber line that will obtain after this non-general figure element dividing.Described cloud line and polyline have some connection end points respectively, so the suitable end points split plot design of both, and wherein, the end points split plot design is to cut apart at each connection end point place, so do not need to be provided with segmentation precision at the operation of cutting apart of cloud line and polyline.To elliptic arc, ellipse and SPL identical or different dividing methods and segmentation precision can be set, wherein, elliptic arc, ellipse and SPL do not have connection end point, therefore, so the inapplicable end points split plot design of three is cutting apart operation segmentation precision need be set at elliptic arc, ellipse and SPL.Segmentation precision is more little, and it is many more to obtain camber line after cutting apart, and transformation result is accurate more, but slewing rate is slow relatively more.
Receiver module 110 is used for receiving mould design figure file from database 5, and obtains pel from the mould design figure file that receives.
Screening module 120 is used for filtering out according to the attribute information of pel the general pel and the literal pel of accessed pel, needing to obtain the non-general pel of conversion.General pel comprises line segment, circle, circular arc, and non-general pel comprises polyline, cloud line, ellipse, elliptic arc, SPL etc.
Judge module 130 is used for determining the type of each non-general pel, and non-general pel comprises polyline, cloud line, ellipse, elliptic arc, and type such as SPL.
Modular converter 140 is used for dividing method and the segmentation precision according to the various types of non-general pel correspondence that is provided with, each non-general pel is divided into the plurality of sub pel respectively, and ask for respectively and approach circular arc cutting apart each camber line in the subgraph unit that obtains, replace corresponding camber line in the subgraph unit to approach circular arc, each the subgraph unit after approaching circular arc and asking for promptly is the general pel of each non-general pel correspondence.For example, when a non-general pel is polyline, modular converter 140 is divided into some line segments according to each connection end point of this polyline with it, or some line segments and circular arc, polyline A as shown in Figure 4 is made up of 3 line segment a1a2, a2a3 and a3a4, then modular converter 140 is reduced to 3 line segment a1a2, a2a3 and a3a4 according to connection end point a1, a2, a3 and a4 with polyline A, and line segment a1a2, a2a3 and a3a4 promptly are the general pels of this polyline A.Similarly, when this non-general pel was the cloud line, modular converter 140 was divided into the plurality of sections camber line according to each connection end point with this cloud line.As shown in Figure 4, modular converter 140 is divided into six sections camber line b1b2, b2b3, b3b4, b4b5, b5b6 and b6b1 according to connection end point b1, b2, b3, b4, b5 and the b6 of cloud line B with cloud line B.Further, modular converter 140 is asked for the circular arc that approaches of each section camber line, approaches the general pel of circular arc as this cloud line correspondence with all that obtain.Described approach circular arc be meant try to achieve by mathematical method with one section immediate one section circular arc of arc shape.When this non-general pel is elliptic arc, ellipse or SPL, because it does not have connection end point, so will cut apart according to segmentation precision and dividing method.With the oval C among Fig. 4 is example, the girth of supposing this ellipse C is 1 millimeter, segmentation precision is 0.1 millimeter, if adopt average split plot design, then modular converter 140 on average is divided into 10 sections camber lines with oval C, ask for the circular arc that approaches of each section camber line, approach the general pel of circular arc as oval C correspondence with all that obtain.The transfer process of elliptic arc and SPL is similar with oval transfer process, does not repeat them here.
Storage module 150 is used to store the general pel that obtains after each non-general pel conversion to database 5.
As shown in Figure 3, be the process flow diagram of pel conversion method of the present invention preferred embodiment.
Step S10 is provided with dividing method and segmentation precision that module 100 is provided with the non-general pel of all kinds.Described dividing method can be the mathematical method of end points split plot design, average split plot design, recurrence split plot design or other any adaptation.Described segmentation precision is meant the length of the minimum camber line that will obtain after this non-general figure element dividing.Described cloud line and polyline have some connection end points respectively, so the suitable end points split plot design of both, and wherein, the end points split plot design is to cut apart at each connection end point place, so do not need to be provided with segmentation precision at the operation of cutting apart of cloud line and polyline.To elliptic arc, ellipse and SPL identical or different dividing methods and segmentation precision can be set, wherein, elliptic arc, ellipse and SPL do not have connection end point, therefore, so the inapplicable end points split plot design of three is cutting apart operation segmentation precision need be set at elliptic arc, ellipse and SPL.
Step S12, receiver module 110 receives mould design figure file from database 5, and obtains the pel in this mould design figure file.
Step S14, screening module 120 filters out general pel in the pel that receives according to the attribute information of each pel, as line segment, circle, circular arc, and the literal pel, needing to obtain the non-general pel of conversion, comprise polyline, cloud line, ellipse, elliptic arc, SPL etc.
Step S16, judge module 130 is determined the type of each non-general pel, is to be polyline, or the cloud line, or oval, or elliptic arc, still is SPL.When this non-general pel is polyline, enter step S18; When this non-general pel is ellipse or elliptic arc, enter step S20; When this non-general pel is the cloud line, enter step S22; When this non-general pel is SPL, enter step S24.
Step S18, modular converter 140 is divided into some line segments or line segment and circular arc according to each connection end point of this polyline with it.Afterwards, enter step S28.
Step S20, modular converter 140 should ellipse according to the dividing method that is provided with and segmentation precision or elliptic arc be divided into the plurality of sections camber line.Afterwards, enter step S26.
Step S22, modular converter 140 is divided into the plurality of sections camber line according to each connection end point with this cloud line.Afterwards, enter step S26.
Step S24, modular converter 140 is divided into the plurality of sections camber line according to the dividing method and the segmentation precision that are provided with this SPL.Afterwards, enter step S26.
Step S26, modular converter 140 ask for the circular arc that approaches of each camber line that obtains after this non-general figure element dividing, and approach the general pel of circular arc for this non-general pel correspondence with all that obtain.
Step S28, the general pel that obtains after each non-general pel conversion of storage module 150 storages is to database 5.

Claims (10)

1. a pel converting system runs on main frame, it is characterized in that, this pel converting system comprises:
Module is set, is used to be provided with the dividing method and the segmentation precision of the non-general pel of all kinds;
Receiver module is used for receiving mould design figure file from database, and obtains the pel in this mould design figure file;
Screen module, be used for filtering out the general pel and the literal pel of the pel that gets access to, needing to obtain the non-general pel of conversion according to the attribute information of each pel;
Judge module is used for determining the type of each non-general pel; And
Modular converter, be used for each non-general pel being divided into a plurality of subgraph unit respectively according to corresponding dividing method and segmentation precision, and ask for respectively and approach circular arc cutting apart each camber line in the subgraph unit that obtains, to approach the corresponding camber line in the circular arc replacement subgraph unit, to obtain general pel corresponding to each non-general pel.
2. pel converting system as claimed in claim 1 is characterized in that, described general pel comprises line segment, circle and circular arc, and described non-general pel comprises polyline, cloud line, ellipse, elliptic arc and SPL.
3. pel converting system as claimed in claim 2 is characterized in that, when described non-general pel was polyline, this modular converter was divided into many line segments according to each connection end point of this polyline with this polyline, or many line segments and circular arc.
4. pel converting system as claimed in claim 2 is characterized in that, when described non-general pel was the cloud line, this modular converter was divided into the multistage camber line according to this each connection end point of cloud line with this cloud line, and asked for the circular arc that approaches of each camber line.
5. pel converting system as claimed in claim 2, it is characterized in that, when described non-general pel is ellipse, elliptic arc or SPL, this modular converter according to the dividing method that is provided with and segmentation precision should ellipse, elliptic arc or SPL be divided into the multistage camber line, and ask for the circular arc that approaches of each camber line.
6. a pel conversion method runs on main frame, it is characterized in that, this method comprises:
The dividing method and the segmentation precision of the non-general pel of all kinds are set;
Receive mould design figure file from database, obtain the pel in this mould design figure file;
Filter out general pel and literal pel in the pel that gets access to according to the attribute information of each pel, needing to obtain the non-general pel of conversion;
Determine the type of each non-general pel; And
According to corresponding dividing method and segmentation precision each non-general pel is divided into a plurality of subgraph unit respectively, and ask for respectively and approach circular arc cutting apart each camber line in the subgraph unit that obtains, to approach the corresponding camber line in the circular arc replacement subgraph unit, to obtain general pel corresponding to each non-general pel.
7. pel conversion method as claimed in claim 6 is characterized in that, described general pel comprises line segment, circle and circular arc, and described non-general pel comprises polyline, cloud line, ellipse, elliptic arc and SPL.
8. pel conversion method as claimed in claim 7 is characterized in that, when described non-general pel is polyline, according to each connection end point of this polyline it is divided into many line segments, or many line segments and circular arc.
9. pel conversion method as claimed in claim 7 is characterized in that, when described non-general pel is the cloud line, according to each connection end point this cloud line is divided into the multistage camber line, and asks for the circular arc that approaches of each camber line.
10. pel conversion method as claimed in claim 7, it is characterized in that, when described non-general pel is oval, elliptic arc or SPL, according to the dividing method that is provided with and segmentation precision should ellipse, elliptic arc or SPL be divided into the multistage camber line, and ask for the circular arc that approaches of each camber line.
CN200810303594A 2008-08-08 2008-08-08 Graphics primitive conversion system and graphics primitive conversion method Pending CN101645099A (en)

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Application Number Priority Date Filing Date Title
CN200810303594A CN101645099A (en) 2008-08-08 2008-08-08 Graphics primitive conversion system and graphics primitive conversion method

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Application Number Priority Date Filing Date Title
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CN101645099A true CN101645099A (en) 2010-02-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112214809A (en) * 2020-10-16 2021-01-12 安徽工程大学 Method and device for randomly arranging graphics primitives

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112214809A (en) * 2020-10-16 2021-01-12 安徽工程大学 Method and device for randomly arranging graphics primitives
CN112214809B (en) * 2020-10-16 2023-11-17 安徽工程大学 Random primitive arrangement method and device

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Open date: 20100210