CN110263426A - A kind of middle face abstracting method, device and the storage medium of thin-wall construction model - Google Patents
A kind of middle face abstracting method, device and the storage medium of thin-wall construction model Download PDFInfo
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Abstract
The present invention provides middle face abstracting method, device and the storage medium of a kind of thin-wall construction model, the described method includes: the inner surface gross area and total outer surface area of the thin-wall construction model, to obtain the size relation of the inner surface gross area and total outer surface area；The model after operation is biased is biased to the inner surface or outer surface according to the size relation, using the mid-plane model as the thin-wall construction model.Scheme provided by the invention can guarantee the quality of mid-plane model.
Description
Technical field
The present invention relates to middle face abstracting method, device and the storages of control field more particularly to a kind of thin-wall construction model
Medium.
Background technique
In structural behaviour simulation analysis, for thin-wall construction CAD model, it can directly divide three-dimensional grid and be counted
It calculates, division two-dimensional grid calculates again after face can also be drawn to the CAD model of thin-wall construction；Due to dividing two after drawing face
The method for tieing up grid has absolute predominance compared to the direct method for dividing three-dimensional grid on number of grid and calculating speed, at present
CAD thin-walled model usually will do it and draw surface treatment.
Current simulation software, which generally has, draws the function in face automatically, but complex thin-wall model cannot usually be obtained compared with
Good mid-plane model, unqualified middle face, the unqualified middle face such as breakage, missing, section, folding often occur will lead to simulation result not
Accurately, or even completely can not calculate as a result, it is desirable to manually repaired or adjusting parameter extract again in face；And it is artificial
Repairing or adjustment generally require to take considerable time, and effect is also not satisfactory.
Summary of the invention
It is a primary object of the present invention to overcome the defect of the above-mentioned prior art, a kind of middle face of thin-wall construction model is provided
Abstracting method, device and storage medium are not conformed to easily with solving in the prior art to extract face in the progress of thin-wall construction model
The problem of lattice.
One aspect of the present invention provides a kind of middle face abstracting method of thin-wall construction model, comprising: the thin-walled knot
The inner surface gross area and total outer surface area of structure model, to obtain the size of the inner surface gross area and total outer surface area
Relationship；According to the size relation to the inner surface or outer surface be biased operation biased after model, using as
The mid-plane model of the thin-wall construction model.
Optionally, before the inner surface gross area of the thin-wall construction model and total outer surface area, further includes:
Face in thin-wall construction model progress is extracted, to obtain the first mid-plane model of the thin-wall construction model；To progress in
First mid-plane model of the thin-wall construction model that face obtains after extracting carries out continuous sex determination；Determining face in described first
In the discontinuous situation of model, the inner surface gross area and total outer surface area of the thin-wall construction model, to obtain
State the size relation of the inner surface gross area and total outer surface area.
Optionally, the first mid-plane model of the thin-wall construction model obtained after extracting to face in progress carries out continuity
Determine, comprising: S1, randomly select a face from first mid-plane model as datum level, be put into the datum level set
In；S2, traversal search is carried out to remaining face in first mid-plane model based on the datum level set, will it is described remaining
The face conllinear with the datum level that the datum level set is included is put into the datum level set as datum level in face；S3,
Step S2 is repeated, when first quantity in the included face of face set is not further added by, obtains first mid-plane model
Second quantity in the face for being included, the size by comparing first quantity and second quantity judge the mid-plane model
It is whether continuous；Wherein, if first quantity is equal to second quantity, determine that the mid-plane model is continuous, if described the
One quantity is less than second quantity and then determines that the mid-plane model exists discontinuously.
Optionally, the mould after operation is biased is biased to the inner surface or outer surface according to the size relation
Type, using the mid-plane model as the thin-wall construction model, comprising: if the inner surface gross area is less than the total face in the outer surface
Product, then using the outer surface as biased reference face, conversely, then using the inner surface as biased reference face；It will be as described
The outer surface in biased reference face or inner surface bias pre-determined distance to another side, with the model after being biased.
Optionally, the pre-determined distance, comprising: the preset fraction of the thickness of the thin-wall construction model times.
Another aspect of the present invention provides a kind of middle face draw-out device of thin-wall construction model, comprising: comparing unit is used for
Compare the inner surface gross area and total outer surface area of the thin-wall construction model, to obtain the inner surface gross area and appearance
The size relation of the face gross area；Bias unit, for being biased according to the size relation to the inner surface or outer surface
The model after being biased is operated, using the mid-plane model as the thin-wall construction model.
Optionally, further includes: extracting unit, for the inner surface in the comparing unit thin-wall construction model
Before the gross area and total outer surface area, face in thin-wall construction model progress is extracted, to obtain the thin-wall construction mould
First mid-plane model of type；Judging unit, in first to the thin-wall construction model obtained after face extraction in progress
Surface model carries out continuous sex determination；The comparing unit determines that first mid-plane model is discontinuous in the judging unit
In the case of, the inner surface gross area and total outer surface area of the thin-wall construction model, to obtain the total face of the inner surface
The long-pending size relation with total outer surface area.
Optionally, the judging unit, face in the first of the thin-wall construction model obtained after being extracted to face in progress
Model carries out continuous sex determination, comprising: S1, randomly selects a face from first mid-plane model as datum level, is put into
In the datum level set；S2, remaining face in first mid-plane model traverse based on the datum level set and is searched
Face conllinear with the datum level that the datum level set is included in remaining described face is put into the base as datum level by rope
In quasi- face set；S3, step S2 is repeated, when first quantity in the included face of face set is not further added by, obtains institute
Second quantity in the face that the first mid-plane model is included is stated, is sentenced by comparing the size of first quantity and second quantity
Whether the mid-plane model that breaks is continuous；Wherein, if first quantity is equal to second quantity, determine the mid-plane model
Continuously, determine that the mid-plane model exists discontinuously if first quantity is less than second quantity.
Optionally, the bias unit is biased operation to the inner surface or outer surface according to the size relation
Model after being biased, using the mid-plane model as the thin-wall construction model, comprising: if the inner surface gross area is less than
The total outer surface area, then using the outer surface as biased reference face, conversely, then using the inner surface as biased reference
Face；Pre-determined distance will be biased to another side as the outer surface in the biased reference face or inner surface, with the mould after being biased
Type.
Optionally, the pre-determined distance, comprising: the preset fraction of the thickness of the thin-wall construction model times.
Another aspect of the invention provides a kind of storage medium, is stored thereon with computer program, and described program is processed
The step of device realizes aforementioned any the method when executing.
According to the technique and scheme of the present invention, the middle face that thin-wall construction model is carried out by the way of bias operation is extracted, and is calculated
Method is fairly simple, and can reduce and draw face error probability, saves repair time, thin in simulation analysis process so as to be promoted
Wall model draws the speed in face, while can guarantee the quality of mid-plane model, and then structure simulation analysis efficiency is greatly improved；For
The thin-wall construction model of the complexity such as more complex filter, muffler, compressor can also guarantee mid-plane model in air-conditioning duct
Mid-plane model is obtained under the premise of quality faster；Scheme provided by the invention apply also for simultaneously shell sheet metal structural and other
The model of thin wall.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the method schematic diagram of an embodiment of the middle face abstracting method of thin-wall construction model provided by the invention；
Fig. 2 is the method schematic diagram of another embodiment of the middle face abstracting method of thin-wall construction model provided by the invention；
Fig. 3 is the method signal of a specific embodiment of the middle face abstracting method of thin-wall construction model provided by the invention
Figure；
Fig. 4 is the structural schematic diagram of an embodiment of the middle face draw-out device of thin-wall construction model provided by the invention；
Fig. 5 is the structural schematic diagram of another embodiment of the middle face draw-out device of thin-wall construction model provided by the invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
Fig. 1 is the method schematic diagram of an embodiment of the middle face abstracting method of thin-wall construction model provided by the invention.Institute
It states thin-wall construction model and is specifically as follows thin-wall construction CAD model.
As shown in Figure 1, according to one embodiment of present invention, the middle face abstracting method of the thin-wall construction model at least wraps
Include step S110 and step S120.
Step S110, the inner surface gross area and total outer surface area of the thin-wall construction model are described to obtain
The size relation of the inner surface gross area and total outer surface area.
Specifically, the inner surface gross area S of the thin-wall construction model is measurediWith total outer surface area So, and described in comparison
Inner surface gross area SiWith the total outer surface area SoSize.
Step S120, according to the size relation to the inner surface or outer surface be biased operation biased after
Model, using the mid-plane model as the thin-wall construction model.
Specifically, if the inner surface gross area is less than the total outer surface area, using the outer surface as biasing
Datum level, conversely, then using the inner surface as biased reference face；It will be as the outer surface in the biased reference face or inner surface
Pre-determined distance is biased to another side, with the model after being biased.
For example, the inner surface gross area SiWith the total outer surface area SoSize, if the total face of the inner surface
Product SiLess than the total outer surface area So, i.e. Si< So, then using the outer surface as biased reference face, conversely, i.e. So< Si,
Then using the inner surface as biased reference face；It will be biased as the outer surface in the biased reference face or inner surface to another side
Pre-determined distance, then the model obtained after biasing is stored as to the mid-plane model of the thin-wall construction model.The pre-determined distance can
Think the preset fraction times of the thickness of the thin-wall construction model, for example, measurement obtain thin-wall construction model with a thickness of d, in advance
If score is 1/2, that is, pre-determined distance h=d/2, then will be biased as the outer surface in biased reference face or inner surface to another side
D/2 distance, even biased reference face are the inner surface of thin-wall construction model, then inner surface exterior surface are biased d/2 distance, if
Biased reference face is the outer surface of thin-wall construction model, then outer surface inner surface is biased d/2 distance, then will be biased behaviour
Mid-plane model of the model obtained after work as the thin-wall construction model.
Fig. 2 is the method schematic diagram of another embodiment of the middle face abstracting method of thin-wall construction model provided by the invention.
As shown in Fig. 2, the method also includes step S102 and step S104.The step S102 and step S104 can be in steps
It is executed before S110.
Step S102 extracts face in thin-wall construction model progress, to obtain the first of the thin-wall construction model
Mid-plane model.
Specifically, the inner surface gross area of the thin-wall construction model and total outer surface area (step S110) it
Before, face in thin-wall construction model progress is extracted, to obtain the first mid-plane model of the thin-wall construction model.Thin-walled knot
Structure model primitive be it is three-dimensional, have length and width and thickness, because thickness is smaller and referred to as thin-wall construction, for convenient for
It calculates, thin-wall construction threedimensional model (body) is generally reduced to two dimensional model (face), leave behind long and wide two sizes, this mistake
Journey is face of drawing.Specifically, the thin-wall construction model can be imported to have in the simulation software for drawing face function and carried out
It extracts in middle face, that is, face in thin-wall construction model progress is extracted using the face function of drawing that the simulation software carries, example
Such as face in thin-wall construction model progress is extracted using the Mid-Surface function of being carried in ANSYS DesignModeler.
It is alternatively possible to the thin-wall construction model is extracted using to face in carrying out by the way of obtaining middle face in face of progress interpolation, with
Obtain the first mid-plane model of the thin-wall construction model.Such as face function is drawn using what existing simulation software carried, it adopts
The mode in middle face is obtained with interpolation is carried out to " facing ", to the thin-wall construction model (hereinafter referred to as thin-walled model) to be processed
Face is extracted in progress, obtains the first mid-plane model of the thin-walled model.
Step S104, first mid-plane model obtained after extracting to face in progress carry out continuous sex determination.
In a specific embodiment, continuous sex determination is carried out to first mid-plane model the following steps are included:
S1, a face is randomly selected from first mid-plane model as datum level, be put into the datum level set.
For example, including six faces face A, B, C, D, E, F in the first mid-plane model, the face B of randomly selecting is put into datum level set
In, that is to say, that it initially only include the face randomly selected from the first mid-plane model in the datum level set.
S2, traversal search is carried out to remaining face in first mid-plane model based on the datum level set, it will be described
The face conllinear with the datum level that the datum level set is included is put into the datum level set as datum level in remaining face
In.
For example, searching for for the first time: using face B as benchmark face, to others face A, C, D, E, F progress time in the first mid-plane model
Go through search, wherein face A and face D are conllinear with face B, then face A and face D are put into datum level set；Second searches for: with face A,
Face B and face D is benchmark face, carries out traversal search to others face C, face E, face F in the first mid-plane model, wherein face C and face A
It is conllinear with face D, then face C is put into datum level set, third time is searched for: using face A, face B, face C and face D as benchmark face, to the
Others face E, face F carry out traversal search in one mid-plane model, and the face conllinear with face A, face B, face C and face D, then do not terminate to search
Rope.
S3, step S2 is repeated, when the first quantity that included face is gathered in face is not further added by, obtains described the
Second quantity in the face that one mid-plane model is included, the size by comparing first quantity and second quantity judge institute
Whether continuous state mid-plane model.
Wherein, if first quantity is equal to second quantity, determine that first mid-plane model is continuous, if described
First quantity is less than second quantity and then determines that first mid-plane model exists discontinuously.For example, set the first quantity as α,
Second quantity is β, determines that the first mid-plane model is complete if α=β, that is, mid-plane model is continuous, directly in the first of storage extraction
Surface model, process terminate；If α < β, it is discontinuous to determine that first mid-plane model exists.
If it is determined that first mid-plane model is continuous, then using first mid-plane model as the thin-wall construction model
Mid-plane model, and terminate process；If it is determined that first mid-plane model is discontinuous, S110 and step S120 are thened follow the steps, i.e.,
Compare the size relation of the thin-wall construction mold inner surfaces gross area and total outer surface area, and according to the size relation pair
The inner surface or outer surface are biased the model after operation is biased, using the middle face mould as the thin-wall construction model
Type.
Technical solution of the present invention to clearly illustrate, below again with a specific embodiment to thin-wall construction provided by the invention
The execution process of the middle face abstracting method of model is described.
Fig. 3 is the method signal of a specific embodiment of the middle face abstracting method of thin-wall construction model provided by the invention
Figure.It include step S201~step S210 in embodiment as shown in Figure 3.
Step S201 draws face to thin-wall construction model automatically.
Whether continuous step S202 judges mid-plane model, if so, S209 is thened follow the steps, if it is not, thening follow the steps
S203。
Step S203 deletes the mid-plane model of extraction.
Step S204 measures thin-wall construction phantom thicknesses.
Step S205 measures the thin-wall construction model inner and outer surfaces gross area.
Step S206 compares the size of the inner and outer surfaces gross area, if the inner surface gross area is greater than total outer surface area,
Step S207 is executed, if total outer surface area is greater than the inner surface gross area, thens follow the steps S208.
Step S207, if the inner surface gross area is greater than total outer surface area, i.e. Si> So, then take on the basis of inner surface towards
Next outer biasing executes step S209.
Step S208, if total outer surface area is greater than the inner surface gross area, i.e. Si< So, then take on the basis of outer surface towards
Next interior biasing executes step S209.
Model after biasing is stored as mid-plane model by step S209, and process terminates.
Fig. 4 is the structural schematic diagram of an embodiment of the middle face draw-out device of thin-wall construction model provided by the invention.Such as
Shown in Fig. 4, the middle face draw-out device 100 of the thin-wall construction model includes comparing unit 110 and bias unit 120.
Comparing unit 110 is used for the inner surface gross area and total outer surface area of the thin-wall construction model, with
To the size relation of the inner surface gross area and total outer surface area；Bias unit 120 is used for according to the size relation pair
The inner surface or outer surface are biased the model after operation is biased, using the middle face mould as the thin-wall construction model
Type.
Specifically, described device further includes measuring unit (not shown), for measuring the interior table of the thin-wall construction model
Face gross area SiWith total outer surface area So, the inner surface gross area S of comparing unit 110iWith the total outer surface area
SoSize.If the inner surface gross area be less than the total outer surface area, bias unit 120 using the outer surface as
Biased reference face, conversely, then bias unit 120 is using the inner surface as biased reference face；The biased reference face will be used as
Outer surface or inner surface to another side bias pre-determined distance, with the model after being biased.
For example, the inner surface gross area S of comparing unit 110iWith the total outer surface area SoSize, if institute
State inner surface gross area SiLess than the total outer surface area So, i.e. Si< So, then bias unit 120 using the outer surface as
Biased reference face, conversely, i.e. So< Si, then bias unit 120 is using the inner surface as biased reference face；Bias unit 120 will
Pre-determined distance is biased to another side as the outer surface in the biased reference face or inner surface, then the model obtained after biasing is deposited
Storage is the mid-plane model of the thin-wall construction model.The pre-determined distance can be the default of the thickness of the thin-wall construction model
Score times, for example, measurement obtain thin-wall construction model with a thickness of d, preset fraction 1/2, that is, pre-determined distance h=d/2, then
D/2 distance will be biased to another side as the outer surface in biased reference face or inner surface, even biased reference face is thin-wall construction
Inner surface exterior surface is then biased d/2 distance by the inner surface of model, if biased reference face is the appearance of thin-wall construction model
Outer surface inner surface is then biased d/2 distance by face, then will be biased the model obtained after operation as the thin-wall construction
The mid-plane model of model.
Fig. 5 is the structural schematic diagram of another embodiment of the middle face draw-out device of thin-wall construction model provided by the invention.
As shown in figure 5, based on the above embodiment, the middle face draw-out device 100 of the thin-wall construction model further includes 102 He of extracting unit
Judging unit 104.
Extracting unit 102 be used for the comparing unit 110 thin-wall construction model the inner surface gross area with
Before total outer surface area, face in thin-wall construction model progress is extracted, to obtain the first of the thin-wall construction model
Mid-plane model；First mid-plane model of the thin-wall construction model that judging unit 104 is used to obtain after extracting face in progress
Carry out continuous sex determination；The comparing unit 110 determines the discontinuous feelings of the first mid-plane model in the judging unit 104
Under condition, the inner surface gross area and total outer surface area of the thin-wall construction model, to obtain the inner surface gross area
With the size relation of total outer surface area.
Specifically, in the inner surface gross area and total outer surface area of the thin-wall construction model of comparing unit 110
Before, extracting unit 102 extracts face in thin-wall construction model progress, to obtain in the first of the thin-wall construction model
Surface model.Thin-wall construction model primitive be it is three-dimensional, have length and width and thickness, it is referred to as thin because thickness is smaller
Wall construction, thin-wall construction threedimensional model (body) to be generally reduced to two dimensional model (face), is left behind long and wide by two convenient for calculating
A size, this process are face of drawing.Specifically, the thin-wall construction model can be imported to have and draws the imitative of face function
In true software carry out in face extract, that is, using the simulation software carry draw face function to the thin-wall construction model into
Face is extracted in row, such as using the Mid-Surface function of carrying in ANSYS DesignModeler to the thin-wall construction model
Face is extracted in progress.It is alternatively possible to the thin-wall construction model using in face of carry out interpolation obtain by the way of middle face into
Face is extracted in row, to obtain the first mid-plane model of the thin-wall construction model.Such as carried using existing simulation software
Face function is drawn, it is (following to the thin-wall construction model to be processed by the way of carrying out interpolation to " facing " and obtaining middle face
Abbreviation thin-walled model) carry out in face extract, obtain the first mid-plane model of the thin-walled model.
First mid-plane model that face obtains after extracting in 104 pairs of judging unit progress carries out continuous sex determination.One
In kind of specific embodiment, judging unit 104 continuous sex determination is carried out to first mid-plane model the following steps are included:
S1, a face is randomly selected from first mid-plane model as datum level, be put into the datum level set.
For example, including six faces face A, B, C, D, E, F in the first mid-plane model, the face B of randomly selecting is put into datum level set
In, that is to say, that it initially only include the face randomly selected from the first mid-plane model in the datum level set.
S2, traversal search is carried out to remaining face in first mid-plane model based on the datum level set, it will be described
The face conllinear with the datum level that the datum level set is included is put into the datum level set as datum level in remaining face
In.
For example, searching for for the first time: using face B as benchmark face, to others face A, C, D, E, F progress time in the first mid-plane model
Go through search, wherein face A and face D are conllinear with face B, then face A and face D are put into datum level set；Second searches for: with face A,
Face B and face D is benchmark face, carries out traversal search to others face C, face E, face F in the first mid-plane model, wherein face C and face A
It is conllinear with face D, then face C is put into datum level set, third time is searched for: using face A, face B, face C and face D as benchmark face, to the
Others face E, face F carry out traversal search in one mid-plane model, and the face conllinear with face A, face B, face C and face D, then do not terminate to search
Rope.
S3, step S2 is repeated, when the first quantity that included face is gathered in face is not further added by, obtains described the
Second quantity in the face that one mid-plane model is included, the size by comparing first quantity and second quantity judge institute
Whether continuous state mid-plane model.
Wherein, if first quantity is equal to second quantity, determine that first mid-plane model is continuous, if described
First quantity is less than second quantity and then determines that first mid-plane model exists discontinuously.For example, set the first quantity as α,
Second quantity is β, determines that the first mid-plane model is complete if α=β, that is, mid-plane model is continuous, directly in the first of storage extraction
Surface model, process terminate；If α < β, it is discontinuous to determine that first mid-plane model exists.
If it is determined that unit 104 determines that first mid-plane model is continuous, then using first mid-plane model as described thin
The mid-plane model of wall construction model, and terminate process；If it is determined that unit 104 determines that first mid-plane model is discontinuous, then compare
Compared with the size relation of the unit 110 thin-wall construction mold inner surfaces gross area and total outer surface area, bias unit 120
The model after operation is biased is biased to the inner surface or outer surface according to the size relation, using as described thin
The mid-plane model of wall construction model.
The present invention also provides a kind of storage mediums for the middle face abstracting method for corresponding to the thin-wall construction model, deposit thereon
The step of containing computer program, aforementioned any the method realized when described program is executed by processor.
Accordingly, scheme provided by the invention, the middle face that thin-wall construction model is carried out by the way of bias operation are extracted, are calculated
Method is fairly simple, and can reduce and draw face error probability, saves repair time, thin in simulation analysis process so as to be promoted
Wall model draws the speed in face, while can guarantee the quality of mid-plane model, and then structure simulation analysis efficiency is greatly improved；For
The thin-wall construction model of the complexity such as more complex filter, muffler, compressor can also guarantee mid-plane model in air-conditioning duct
Mid-plane model is obtained under the premise of quality faster；Scheme provided by the invention apply also for simultaneously shell sheet metal structural and other
The model of thin wall.
Function described herein can be implemented in hardware, the software executed by processor, firmware or any combination thereof.
If implemented in the software executed by processor, computer can be stored in using function as one or more instructions or codes
It is transmitted on readable media or via computer-readable media.Other examples and embodiment are wanted in the present invention and appended right
It asks in the scope and spirit of book.For example, due to the property of software, function described above can be used by processor,
Hardware, firmware, hardwired or the software implementation for appointing the combination of whichever to execute in these.In addition, each functional unit can integrate
In one processing unit, it is also possible to each unit to physically exist alone, can also be integrated in two or more units
In one unit.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, such as the division of the unit, Ke Yiwei
A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of unit or module
It connects, can be electrical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, and fill as control
The component set may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
On unit.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can for personal computer, server or network equipment etc.) execute each embodiment the method for the present invention whole or
Part steps.And storage medium above-mentioned includes: that USB flash disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic or disk etc. be various to can store program code
Medium.
The above description is only an embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should be included within scope of the presently claimed invention.
Claims (10)
1. a kind of middle face abstracting method of thin-wall construction model characterized by comprising
Compare the inner surface gross area and total outer surface area of the thin-wall construction model, with obtain the inner surface gross area with
The size relation of total outer surface area；
The model after operation is biased is biased to the inner surface or outer surface according to the size relation, using as institute
State the mid-plane model of thin-wall construction model.
2. the method according to claim 1, wherein in the inner surface gross area of the thin-wall construction model
Before total outer surface area, further includes:
Face in thin-wall construction model progress is extracted, to obtain the first mid-plane model of the thin-wall construction model；
First mid-plane model of the thin-wall construction model obtained after extracting to face in progress carries out continuous sex determination；
In the case where determining the discontinuous situation of the first mid-plane model, the inner surface gross area of the thin-wall construction model with
Total outer surface area, to obtain the size relation of the inner surface gross area and total outer surface area.
3. according to the method described in claim 2, it is characterized in that, the thin-wall construction mould obtained after being extracted to face in progress
First mid-plane model of type carries out continuous sex determination, comprising:
S1, a face is randomly selected from first mid-plane model as datum level, be put into the datum level set；
S2, traversal search is carried out to remaining face in first mid-plane model based on the datum level set, will it is described remaining
Face in the face conllinear with the datum level that the datum level set is included be put into the datum level set as datum level；
S3, step S2 is repeated, when first quantity in the included face of face set is not further added by, obtained in described first
Second quantity in the face that surface model is included, the size by comparing first quantity and second quantity judge in described
Whether surface model is continuous；
Wherein, if first quantity is equal to second quantity, determine that the mid-plane model is continuous, if first quantity
It is discontinuous then to determine that the mid-plane model exists less than second quantity.
4. method according to claim 1-3, which is characterized in that according to the size relation to the inner surface
Or outer surface is biased the model after operation is biased, using the mid-plane model as the thin-wall construction model, comprising:
If the inner surface gross area is less than the total outer surface area, using the outer surface as biased reference face, conversely,
Then using the inner surface as biased reference face；
Pre-determined distance will be biased to another side as the outer surface in the biased reference face or inner surface, with the mould after being biased
Type.
5. according to the method described in claim 4, it is characterised by comprising: the pre-determined distance, comprising: the thin-wall construction
The preset fraction of the thickness of model times.
6. a kind of middle face draw-out device of thin-wall construction model characterized by comprising
Comparing unit, it is described to obtain for the inner surface gross area and total outer surface area of the thin-wall construction model
The size relation of the inner surface gross area and total outer surface area；
Bias unit, for according to the size relation to the inner surface or outer surface be biased operation biased after
Model, using the mid-plane model as the thin-wall construction model.
7. device according to claim 6, which is characterized in that further include:
Extracting unit, in the comparing unit thin-wall construction model the inner surface gross area and the total face in outer surface
Before product, face in thin-wall construction model progress is extracted, to obtain the first mid-plane model of the thin-wall construction model；
Judging unit, the first mid-plane model of the thin-wall construction model for obtaining after extracting to face in progress carry out continuous
Sex determination；
The comparing unit is more described thin in the case where the judging unit determines the discontinuous situation of the first mid-plane model
The inner surface gross area and total outer surface area of wall construction model, to obtain the inner surface gross area and total outer surface area
Size relation.
8. device according to claim 7, which is characterized in that the judging unit obtains after extracting to face in progress
First mid-plane model of the thin-wall construction model carries out continuous sex determination, comprising:
S1, a face is randomly selected from first mid-plane model as datum level, be put into the datum level set；
S2, traversal search is carried out to remaining face in first mid-plane model based on the datum level set, will it is described remaining
Face in the face conllinear with the datum level that the datum level set is included be put into the datum level set as datum level；
S3, step S2 is repeated, when first quantity in the included face of face set is not further added by, obtained in described first
Second quantity in the face that surface model is included, the size by comparing first quantity and second quantity judge in described
Whether surface model is continuous；
Wherein, if first quantity is equal to second quantity, determine that the mid-plane model is continuous, if first quantity
It is discontinuous then to determine that the mid-plane model exists less than second quantity.
9. according to the described in any item devices of claim 6-8, which is characterized in that the bias unit is closed according to the size
It is that the model after operation is biased is biased to the inner surface or outer surface, as in the thin-wall construction model
Surface model, comprising:
If the inner surface gross area is less than the total outer surface area, using the outer surface as biased reference face, conversely,
Then using the inner surface as biased reference face；
Pre-determined distance will be biased to another side as the outer surface in the biased reference face or inner surface, with the mould after being biased
Type.
10. a kind of storage medium, which is characterized in that it is stored thereon with computer program, it is real when described program is executed by processor
The step of existing claim 1-5 any the method.
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