CN101561830A - Dimension marking method for CAD and device thereof - Google Patents
Dimension marking method for CAD and device thereof Download PDFInfo
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- CN101561830A CN101561830A CNA2008101044406A CN200810104440A CN101561830A CN 101561830 A CN101561830 A CN 101561830A CN A2008101044406 A CNA2008101044406 A CN A2008101044406A CN 200810104440 A CN200810104440 A CN 200810104440A CN 101561830 A CN101561830 A CN 101561830A
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- 230000003993 interaction Effects 0.000 claims description 19
- 238000004513 sizing Methods 0.000 claims description 16
- 230000004048 modification Effects 0.000 claims description 8
- 238000012986 modification Methods 0.000 claims description 8
- 238000002372 labelling Methods 0.000 claims description 3
- 238000011960 computer-aided design Methods 0.000 description 38
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Abstract
The invention provides a dimension marking method for CAD. The method comprises the following steps: receiving primitive selection of a user in CAD drawing; identifying a primitive type of the selected primitive; identifying dimension of the selected primitive according to the identified primitive type; and marking the identified dimension on a dimension locating point. The invention also provides a dimension marking device for CAD. The method and device help improve efficiency of dimension marking in the CAD drawing, thus improving velocity of the CAD drawing.
Description
Technical field
The present invention relates to CAD (Computer Aided Design, computer-aided design (CAD)) field, in particular to a kind of size marking method and apparatus that is used for CAD.
Background technology
In the process that utilization CAD software is drawn, need carry out size marking to each pel that generates of drawing.In the The existing CAD technology, the pel that needs dimensioning is divided into multiple primitive types (for example being straight line, circle, circular arc, ellipse, batten, polyline etc.), and adopts a plurality of size marking inlets to realize the mark of different size type form.Size can be divided into linear dimension, DDI, radius mark, orthodrome mark, angular dimension, arc length mark equidimension type usually according to the markup information of its expression.
The existing CAD is owing to adopt a plurality of size marking inlets, so the user before dimensioning, at first will need determine concrete size type according to mark, passes through menu again, order line or tool bar activate corresponding marking Function, choose the size characteristic point then and mark.
In realizing process of the present invention, the inventor finds that above-mentioned operating process requires the illustrator must be familiar with all kinds of size marking, and can need determine required size type exactly according to concrete mark, and once mark the mark that process can not be finished a plurality of size types, when multiple size type, require the user constantly to switch the size type according to pel, if it is improper to select, also must finish current mark order and activate new mark order, this causes size marking is a more loaded down with trivial details job.Because existing size marking method efficient is lower, so reduced the CAD plotting speed.
Summary of the invention
The present invention aims to provide the size marking method and apparatus of a kind of CAD of being used for, to solve the lower problem of existing size marking method efficient.
In an embodiment of the present invention, provide the size marking method of a kind of CAD of being used for, may further comprise the steps: accepted the user primitive selection in the CAD drawing; To selected pel identification primitive types; According to the primitive types of being discerned selected pel is discerned size; The sizing point that the size marking discerned is selected in the user.
Preferably, accepting the user specifically comprises primitive selection in the CAD drawing: activate the smart dimensions marking Function; Use positioning input device from a plurality of pels that CAD draws, to pick up at least one pel with user interactions to accept the user; The pel of accepting to be picked up is as user-selected pel; With the highlighted demonstration of selected pel.
Preferably, selected pel identification primitive types is specifically comprised: the object of determining selected pel; The attribute about primitive types of reading object; Setting is the primitive types of being discerned about the attribute of primitive types.
Preferably, according to the primitive types of being discerned selected pel identification size is specifically comprised: the attribute about graphic feature of reading object; According to the geometric properties of the primitive types of being discerned to obtain size type about pel; Carry out computing according to size type, the drawing convention of drawing, to obtain the value of size type about the attribute of graphic feature and CAD; What obtain is set to the size discerned about the size type of pel and value thereof.
Preferably, selected pel is a plurality of pels, selected pel identification primitive types is specifically comprised: the object of determining each selected pel; Read the attribute about primitive types of each object; Each attribute about primitive types is set respectively is each primitive types of discerning.
Preferably, according to the primitive types of being discerned selected pel identification size is specifically comprised: the attribute that reads each object about graphic feature; According to the number of the geometric properties of each primitive types of discerning, selected pel to obtain size type about the position relation of a plurality of pels; Carry out computing according to size type, the drawing convention of drawing, to obtain the value of size type about the attribute of graphic feature and CAD; What obtain is set to the size discerned about the size type of the position of a plurality of pels relation and value thereof.
Preferably, the size marking of being discerned is specifically comprised in the sizing point that the user selects: the size of being discerned can be dragged the output of picture ground; Use positioning input device that the size of being discerned is dragged to sign in ad-hoc location to accept the user with user interactions; Ad-hoc location is exported the size marking of being discerned as the sizing point that the user selects.
Preferably, also comprised before the sizing point that the user selects in the size marking that will be discerned: to accept the user numerical value of the size type discerned is made amendment with user interactions.
Preferably, the size type that obtains is included in a plurality of size types, then also comprises: a plurality of size types are selected to accept the user with user interactions; With the size type of selected size type as pel.
In an embodiment of the present invention, also provide the size marking device of a kind of CAD of being used for, having comprised: pel is selected module, is used for accepting the user to CAD drawing primitive selection; The type identification module is used for selected pel identification primitive types; The size identification module is used for according to the primitive types of being discerned selected pel identification size; Labeling module, the sizing point that the size marking that is used for being discerned is selected in the user.
Preferably, also comprise: the modification of dimension module, be used for user interactions accepting the modification of dimension numerical value of user to being discerned, and with the numerical value revised as the size of being discerned.
The size marking method and apparatus of the foregoing description is because adopt software to discern the size of the pel of user's selection automatically, so overcome the lower problem of existing size marking method efficient, and then improved the efficient of size marking, thereby improved the speed that CAD draws.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the process flow diagram according to the size marking method that is used for the CAD drawing of the embodiment of the invention;
Fig. 2 shows the process flow diagram of the size marking method that is used for the CAD drawing according to the preferred embodiment of the invention;
Fig. 3 shows the screenshot capture in the size marking procedure according to the preferred embodiment of the invention;
Fig. 4 shows the screenshot capture in the size marking procedure according to the preferred embodiment of the invention;
Fig. 5 shows the screenshot capture in the size marking procedure according to the preferred embodiment of the invention;
Fig. 6 shows the block scheme according to the size marking device that is used for the CAD drawing of the embodiment of the invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Fig. 1 shows the process flow diagram according to the size marking method that is used for the CAD drawing of the embodiment of the invention, may further comprise the steps:
Step S10 accepts the user to primitive selection in the CAD drawing;
Step S20, to selected pel identification primitive types, this has realized that primitive types discerns automatically;
Step S30, to selected pel identification size, this has realized the smart dimensions coupling according to the primitive types of being discerned;
Step S40, with the sizing point that the size marking of being discerned is selected in the user, this has realized that size generates mark.
Size marking is a very big link of workload normally, improves size marking efficient and just means the raising drawing efficiency.In addition, the illustrator always wishes to finish complicated as far as possible mark work by simple as far as possible marking Function.
In not having the CAD drafting system prior art of smart dimensions, drawing for complexity, the size type is very complicated, the user will finish size marking, the different marking Function of frequent switching of just having to, in case the misjudgment of size type is also had to interrupt current operation and is rejudged the size type and restart inefficiency.And in the mask method of the foregoing description, the user only need select pel and select the sizing point, determines the size of pel by system, and marks in user-selected sizing point.This has not only alleviated user's work fussy degree significantly, and has improved the efficient of dimensioning, can improve the speed that CAD draws effectively.
Preferably, step S10 specifically comprises:
Activate the smart dimensions marking Function, for example the user activates the operation of this method by modes such as order or menu selections;
Use positioning input device to pick up at least one pel with user interactions from a plurality of pels that CAD draws to accept the user, for example the user can use mouse to select a straight-line segment or circular arc etc. in CAD draws;
The pel of accepting to be picked up is as user-selected pel;
With the highlighted demonstration of selected pel.
The preferred embodiment has provided a kind of preferred embodiment of user's selection pel from CAD draws.
Preferably, step S20 specifically comprises: the object of determining selected pel; The attribute about primitive types of reading object (for example property value is straight line, circle, circular arc, ellipse, batten, polyline etc.); Setting is the primitive types of being discerned about the attribute of primitive types.Step S30 specifically comprises: the attribute about graphic feature of reading object (for example starting point and terminal point coordinate etc.); According to the geometric properties of the primitive types of being discerned to obtain size type about pel; The drawing convention of drawing according to the size type, about the attribute of graphic feature and CAD (for example engineer's scale etc.) carries out computing (for example length computation formula, curvature computing formula etc.), to obtain the value of size type; What obtain is set to the size discerned about the size type of pel and value thereof.
Preferably, for according to the geometric properties of the primitive types of being discerned obtaining size type about pel, can be according to the matched rule of the default single mark pel of these geometric propertieses, specific as follows:
Rule 1: the matched rule of single mark pel
| Primitive types | The size type |
| Straight line | Linear dimension |
| Circle | Diameter dimension, radius size |
| Circular arc | Diameter dimension, radius size, Angular Dimension (central angle), arc length mark, linear dimension (chord length) |
| Oval | Radius size (radius-of-curvature), the orthodrome size |
| Batten | Radius size (radius-of-curvature), the orthodrome size |
| Polyline | Straight-line segment: linear dimension arc section: diameter dimension, radius size, Angular Dimension (central angle), arc length mark, linear dimension (chord length) |
Above-mentioned preferred embodiment is determined primitive types by the object from pel, and utilize the determined computing formula of geometric properties that the relevant coordinate of obtaining from object is calculated, thereby obtain the physical dimension of pel, this has realized the physical dimension of single pel is marked, and for example can mark the length of length, arc section of straight-line segment and curvature etc.In addition, the user can select and mark pel seriatim, thereby can mark the size of a plurality of pels in the CAD drawing.
Preferably, selected pel is a plurality of pels, and step S20 specifically comprises: the object of determining each selected pel; Read the attribute about primitive types of each object; Each attribute about primitive types is set respectively is each primitive types of discerning.Step S30 specifically comprises: the attribute about graphic feature that reads each object; According to the number of the geometric properties of each primitive types of discerning, selected pel to obtain size type about the position relation of a plurality of pels; The drawing convention of drawing according to the size type, about the attribute of graphic feature and CAD (for example engineer's scale etc.) carries out computing (for example range formula, angle formula etc.), to obtain the value of size type; What obtain is set to the size discerned about the size type of the position of a plurality of pels relation and value thereof.
Preferably, for according to the geometric properties of a plurality of primitive types of being discerned obtaining size type about pel, can be according to the matched rules of default two the mark pels of these geometric propertieses, specific as follows:
The matched rule of 2: two marks of rule pel
| The point | Straight line | Circle | Circular arc | |
| The point | Linear dimension (2 distances) | Linear dimension (distance between beeline and dot) | Linear dimension (put distance of center circle from) | Linear dimension (put distance of center circle from) |
| Straight line | Linear dimension (distance between beeline and dot) | Two line parallels: linear dimension (two linear distances) two lines going cross each other: Angular Dimension (two wire clamp angles) | Linear dimension (air line distance is arrived to air line distance or point of contact in the center of circle) | Linear dimension (air line distance is arrived to air line distance or point of contact in the center of circle) |
| Circle | Linear dimension (put distance of center circle from) | Linear dimension (air line distance is arrived to air line distance or point of contact in the center of circle) | Concentric circles: linear dimension (semidiameter) two circle intersects: linear dimension (distance of center circle) two circles are from line | Concentric circles: linear dimension (semidiameter) two circle intersects: linear dimension (distance of center circle) two circles from: (distance of center circle or point of contact distance are two to linear dimension |
| The property size (distance of center circle or point of contact distance i.e. two circle minimum distances) | The circle minimum distance) | |||
| Circular arc | Linear dimension (put distance of center circle from) | Linear dimension (air line distance is arrived to air line distance or point of contact in the center of circle) | Concentric circles: linear dimension (semidiameter) two circle intersects: linear dimension (distance of center circle) two circles are from linear dimension (distance of center circle or point of contact distance i.e. two round minimum distances) | Concentric circles: linear dimension (semidiameter) two circle intersects: linear dimension (distance of center circle) two circles are from linear dimension (distance of center circle or point of contact distance i.e. two round minimum distances) |
Above-mentioned preferred embodiment is determined primitive types by the object from pel, and utilize the determined computing formula of geometric properties that the relevant coordinate of obtaining from object is calculated, thereby obtain the geometric relationship between a plurality of pels, the distance between parallel lines for example, angle between intersecting straight lines, this has realized the position of a plurality of pels is concerned that size marks.
Preferably, step S40 specifically comprises: the size of being discerned can be dragged the output of picture ground; Use positioning input device that the size of being discerned is dragged to sign in ad-hoc location to accept the user with user interactions; Ad-hoc location is exported the size marking of being discerned as the sizing point that the user selects.The size control (dragging the picture size) that the user can use mouse at random to drag to export on the screen, thus at an easy rate the mark value is shown in the position of expectation.
Preferably, before step S40, also comprise: to accept the user numerical value of the size type discerned is made amendment with user interactions.This has given the chance of user's modification numerical value, and for example the length that obtains of system is 3cm, and the user can manually be revised as 3.5cm, then output.
Preferably, preferred, the size type that obtains is included in a plurality of size types, then also comprises: a plurality of size types are selected to accept the user with user interactions; With the size type of selected size type as pel.For example round this primitive types can match diameter, radius equidimension type simultaneously, allows the size type of user interactions need to determine.
Fig. 2 shows the process flow diagram of the size marking method that is used for the CAD drawing according to the preferred embodiment of the invention, may further comprise the steps:
Step S202, the user activates the smart dimensions marking Function by modes such as order or menu selections;
Step S204 uses positioning input device to pick up at least one pel with user interactions from a plurality of pels that CAD draws to accept the user;
Step S206 judges whether the user picks up successfully, if pel (for example selecting blank spot etc.) is selected on user error ground, then gets back to step S204;
Step S208, if pick up successfully, highlighted this pel of system then, and discern the primitive types of pel automatically, element figure in the two dimension CAD drafting system comprises: straight line, circle, circular arc, ellipse, batten, polyline etc., after the user picked up pel, system can identify the type of pel according to the property value of graphics primitive object;
Step S210, according to the position between primitive types, number and pel relation information such as (for example a plurality of pels), geometrical rule and size rule (for example engineer's scale) are mated automatically in system, can judgement generate effective dimensions, if could not would get back to step S204;
Step S212, if generate effective dimensions, then the picture size is dragged in output on screen;
Step S214, user's input coordinate position, that perhaps uses mouse at random to drag to export on the screen drags the sizing point of picture size to expectation;
Step S216 judges interaction results, determines that the user selects anchor point or chooses new pel, if select new pel, then gets back to step S204;
Step S218, otherwise determine to export final size after the anchor point.
Fig. 3 shows the screenshot capture in the size marking procedure according to the preferred embodiment of the invention, and this embodiment shows LINEAR on straight line.Fig. 4 shows the screenshot capture in the size marking procedure according to the preferred embodiment of the invention, and this embodiment shows and mark radius size on circular arc.Fig. 5 shows the screenshot capture in the size marking procedure according to the preferred embodiment of the invention, and this embodiment shows final annotation results.
Fig. 6 shows the block scheme according to the size marking device that is used for the CAD drawing of the embodiment of the invention, comprising:
Pel is selected module 10, is used for accepting the user to CAD drawing primitive selection;
Preferably, this size marking device also comprises: the modification of dimension module, be used for user interactions accepting the modification of dimension numerical value of user to being discerned, and with the numerical value revised as the size of being discerned.
The size marking device of the foregoing description is discerned the size of the pel of user's selection automatically because of employing software, thus overcome the lower problem of existing size marking method efficient, and then improved the efficient of size marking, thus improved the speed that CAD draws.
Use the smart dimensions mark of the above embodiment of the present invention that drawing is carried out size marking, simplified the size marking flow process widely, improved drawing efficiency, drawing effect for needs mark large amount of complex size is particularly evident, the user can just can correctly finish most size markings fast by a simple smart dimensions marking Function, greatly improve user's drawing efficiency, reduced user's working strength.Specifically, advantage is as follows:
1, simplifies the size marking step, support a function to finish multiple size type mark.Smart dimensions marks a unified marking Function inlet to the user is provided, the illustrator is before dimensioning, need not to be concerned about the size type, after activating the smart dimensions marking Function, the user only need select to mark pel, and system will go out correct size according to smart dimensions mark rule match automatically.After finishing a size marking, the user can also continue to select other mark pels to carry out the mark of other size types.
2, improve the efficient of size marking, and then improve drawing efficiency.
3, promote the ease for use of CAD software.The user does not need to understand in advance the expression-form and the scope of application of various sizes type when using the smart dimensions mark, smart dimensions can help the user to mark out correct size, has reduced the use threshold of software.
Therefore, the CAD software that the foregoing description is realized provides a kind of smart dimensions mask method and device, obtains the mark pel according to user interactions and mates intelligence mark rule automatically, and then obtain correct size type, greatly simplify the flow process of size marking, reached the purpose of quick mark.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the memory storage and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a size marking method that is used for CAD is characterized in that, may further comprise the steps:
Accept the user to primitive selection in the CAD drawing;
To selected pel identification primitive types;
According to the primitive types of being discerned selected pel is discerned size;
The sizing point that the size marking discerned is selected in the user.
2. size marking method according to claim 1 is characterized in that, accepts the user primitive selection in the CAD drawing is specifically comprised:
Activate the smart dimensions marking Function;
Use positioning input device from a plurality of pels that described CAD draws, to pick up at least one pel with user interactions to accept the user;
The pel of accepting to be picked up is as user-selected pel;
With the highlighted demonstration of selected pel.
3. size marking method according to claim 1 is characterized in that, selected pel identification primitive types is specifically comprised:
Determine the object of selected pel;
Read the attribute about primitive types of described object;
It is the primitive types of being discerned that described attribute about primitive types is set.
4. size marking method according to claim 3 is characterized in that, according to the primitive types of being discerned selected pel identification size is specifically comprised:
Read the attribute about graphic feature of described object;
According to the geometric properties of the primitive types of being discerned to obtain size type about described pel;
Carry out computing according to described size type, described drawing convention of drawing, to obtain the value of described size type about the attribute and the described CAD of graphic feature;
What obtain is set to the size discerned about the size type of described pel and value thereof.
5. size marking method according to claim 1 is characterized in that, selected pel is a plurality of pels, and selected pel identification primitive types is specifically comprised:
Determine the object of each selected pel;
Read the attribute about primitive types of each described object;
Each described attribute about primitive types is set respectively is each primitive types of discerning.
6. size marking method according to claim 5 is characterized in that, according to the primitive types of being discerned selected pel identification size is specifically comprised:
Read the attribute about graphic feature of each described object;
According to the number of the geometric properties of each primitive types of discerning, selected pel to obtain size type about the position relation of described a plurality of pels;
Carry out computing according to described size type, described drawing convention of drawing, to obtain the value of described size type about the attribute and the described CAD of graphic feature;
What obtain is set to the size discerned about the size type of the position of described a plurality of pels relation and value thereof.
7. size marking method according to claim 1 is characterized in that, the size marking of being discerned is specifically comprised in the sizing point that the user selects:
The size of being discerned can be dragged the output of picture ground;
Use positioning input device that the size of being discerned is dragged to sign in ad-hoc location to accept the user with user interactions;
Described ad-hoc location is exported the size marking of being discerned as the described sizing point that the user selects.
8. according to claim 4 or 6 described size marking methods, it is characterized in that, before the sizing point that the user selects, also comprise in the size marking that will be discerned:
The numerical value of the described size type discerned is made amendment to accept the user with user interactions.
9. according to claim 4 or 6 described size marking methods, it is characterized in that the size type that obtains is included in a plurality of size types, then also comprises:
Described a plurality of size types are selected to accept the user with user interactions;
With the size type of selected size type as described pel.
10. a size marking device that is used for CAD is characterized in that, comprising:
Pel is selected module, is used for accepting the user to CAD drawing primitive selection;
The type identification module is used for selected pel identification primitive types;
The size identification module is used for according to the primitive types of being discerned selected pel identification size;
Labeling module, the sizing point that the size marking that is used for being discerned is selected in the user.
11. size marking device according to claim 10 is characterized in that, also comprises:
The modification of dimension module, be used for user interactions accepting the modification of dimension numerical value of user to being discerned, and with the numerical value revised as the size of being discerned.
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