CN107833274A - A kind of creation method and system of three-dimensional cable model - Google Patents
A kind of creation method and system of three-dimensional cable model Download PDFInfo
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- CN107833274A CN107833274A CN201711163136.4A CN201711163136A CN107833274A CN 107833274 A CN107833274 A CN 107833274A CN 201711163136 A CN201711163136 A CN 201711163136A CN 107833274 A CN107833274 A CN 107833274A
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- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/18—Network design, e.g. design based on topological or interconnect aspects of utility systems, piping, heating ventilation air conditioning [HVAC] or cabling
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Abstract
The invention discloses a kind of creation method and system of three-dimensional cable model, to cable basic model, perform each rule in default grammar rule successively based on cable data, establishment obtains three-dimensional cable model, the three-dimensional cable model that establishment obtains is submitted into graphics processor using 3D engines to be rendered, generates three-dimensional cable model image.It can thus be seen that the present invention realizes the true reappearance to cable, for traditional two-dimentional cable model, the present invention substantially increases the effect of visualization of cable model by creating three-dimensional cable model.
Description
Technical field
The present invention relates to model creation technical field, in particular, is related to a kind of creation method of three-dimensional cable model
And system.
Background technology
With the continuous development of power network scale, the ratio of distribution line shared by power cable improves constantly.However, for electricity
The planning and designing of cable, it is most of also to rest on the CAD diagram paper of two dimension, namely two-dimentional cable model is drawn on CAD, therefore,
The effect of visualization of cable model is not strong.
The content of the invention
In view of this, the present invention discloses a kind of creation method and system of three-dimensional cable model, to solve in traditional scheme,
The problem of two-dimentional cable model effect of visualization is not strong.
A kind of creation method of three-dimensional cable model, including：
To cable basic model, perform each rule in default grammar rule successively based on cable data, create
To three-dimensional cable model, wherein, the default grammar rule is the shape grammar being pre-designed；
The three-dimensional cable model that establishment obtains is submitted into graphics processor using 3D engines to be rendered, generation three
Tie up cable model image.
Preferably, it is described to cable basic model, perform each in default grammar rule successively based on cable data
Rule, establishment, which obtains three-dimensional cable model, to be included：
To the cable basic model, the first rules and regulations in the default grammar rule are performed based on the cable data
Then, the first cable basic model is generated；
The first cable basic model is resolved into the cable model of multiple two-dimensional shapes；
Next rule of the first rule described in the default grammar rule is performed based on the cable data, to life
Into multiple cable models be further processed, obtain the second cable basic model；
By that analogy, until having performed the strictly all rules in the default grammar rule, establishment obtains the three-dimensional cable
Model.
Preferably, the default grammar rule includes：Addition rule, subtraction rule and transformation rule；
The addition rule, for after performing model and performing completion, generating new model；
The subtraction rule, for being new submodel by the execution model decomposition after performing model and performing completion；
The transformation rule, for after performing model and performing completion, changing the shape and attribute of the execution model.
A kind of establishment system of three-dimensional cable model, including：
Creating unit, for cable basic model, being performed successively based on cable data each in default grammar rule
Rule, establishment obtain three-dimensional cable model, wherein, the default grammar rule is the shape grammar being pre-designed；
Rendering unit, graphics processor is submitted to for the obtained three-dimensional cable model will to be created using 3D engines and is entered
Row renders, and generates three-dimensional cable model image.
Preferably, the creating unit is specifically used for：
To the cable basic model, the first rules and regulations in the default grammar rule are performed based on the cable data
Then, the first cable basic model is generated；
The first cable basic model is resolved into the cable model of multiple two-dimensional shapes；
Next rule of the first rule described in the default grammar rule is performed based on the cable data, to life
Into multiple cable models be further processed, obtain the second cable basic model；
By that analogy, until having performed the strictly all rules in the default grammar rule, establishment obtains the three-dimensional cable
Model.
Preferably, the default grammar rule includes：Addition rule, subtraction rule and transformation rule；
The addition rule, for after performing model and performing completion, generating new model；
The subtraction rule, for being new submodel by the execution model decomposition after performing model and performing completion；
The transformation rule, for after performing model and performing completion, changing the shape and attribute of the execution model.
It is right the invention discloses a kind of creation method and system of three-dimensional cable model it was found from above-mentioned technical scheme
Cable basic model, each rule in default grammar rule is performed based on cable data successively, and establishment obtains three-dimensional cable
Model, the three-dimensional cable model that establishment obtains is submitted into graphics processor using 3D engines and rendered, generates three-dimensional cable
Model image.It can thus be seen that the present invention realizes the true reappearance to cable, compared by creating three-dimensional cable model
For traditional two-dimentional cable model, the present invention substantially increases the effect of visualization of cable model.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
Disclosed accompanying drawing obtains other accompanying drawings.
Fig. 1 is a kind of creation method flow chart of three-dimensional cable model disclosed in the embodiment of the present invention；
Fig. 2 is a kind of structural representation of the establishment system of three-dimensional cable model disclosed in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
The embodiment of the invention discloses a kind of creation method and system of three-dimensional cable model, to solve in traditional scheme,
The problem of two-dimentional cable model effect of visualization is not strong.
Referring to Fig. 1, a kind of creation method flow chart of three-dimensional cable model, this method bag disclosed in one embodiment of the invention
Include step：
Step S101, to cable basic model, each rules and regulations in default grammar rule are performed successively based on cable data
Then, create and obtain three-dimensional cable model；
Wherein, the cable basic model in this step refers to：The grown form of normal cable, namely cylinder.The electricity
Cable basic model is specially the model data for being built in program bottom, by being configured to model parameter, is realized to cable base
The setting of plinth model, such as, the thickness of model, turning number of degrees etc..
Cable data includes but is not limited to cable voltage class, diameter, bending radius etc..
Default grammar rule is the shape grammar being pre-designed, it is intended to drives two dimensional surface or threedimensional model to be continuously generated electricity
The various details of cable model, the details include：The bending number of degrees of cable, thickness etc., so as to be created that new threedimensional model.
The implication of " driving " is in above-mentioned：Control point is created in space, and is generated and calculated according to the curve of process control point
The control point of establishment is generated a customized curve by method；By the curve and program bottom setting basic model (such as this
Cable basic model in step) combine, by program code, several sub-grids are created, using each sub-grid of establishment,
Obtain new threedimensional model.
Curve derivative algorithm is one section of formula, and the curve equation is specific as follows：
Output_point=P0* (- 0.5*t*t*t+t*t -0.5*t)+P1* (1.5*t*t*t-2.5*t*t+1.0)+
P2*(-1.5*t*t*t+2.0*t*t+0.5*t)+P3*(0.5*t*t*t–0.5*t*t)
In formula, Output_point is referred to：T takes the curve that the Distribution Center obtained during different value is formed；
P0, P1, P2, P3 are respectively the coordinate at four control points of cable basic model, and t value is [0,1].
If it is required that curve passes through tetra- control points of P0, P1, P2 and P3 simultaneously, then need to control for curve arteface
Point, such as P0 to P1 curve is drawn using [2P0-P1, P0, P1, P2], use [P1, P2, P3,2P3-P2] to draw P2
To P3 curve.Specifically, when t linear changes from 0 to 1, curve will be moved to P2 points (t=1) from P1 points (t=0).
Default grammar rule specifically includes：Addition rule, subtraction rule and transformation rule；
Addition rule, for after performing model and performing completion, generating new model；Addition Rule content includes but unlimited
In：Insert, draw high.In the present embodiment, addition rule specifically refers to increase control point to cable basic model, can be in cable
Increase control point before, during and after basic model, to change the trend of cable basic model and length.
Subtraction rule, for being new submodel by the execution model decomposition after performing model and performing completion；Subtraction
Rule content includes but is not limited to：Go convex, decomposition etc..In the present embodiment, subtraction rule refers specifically to remove the control of cable
Point, namely control point is deleted, to change the trend of cable basic model and length.
Transformation rule, for after performing model and performing completion, changing the shape and attribute of the execution model；Conversion rule
Then content includes but is not limited to mobile, rotation, scaling etc..Such as the position of removal cable basic model, cable run is carried out
Adjustment.
Step S102, the three-dimensional cable model that establishment obtains is submitted into graphics processor using 3D engines to be rendered,
Generate three-dimensional cable model image.
3D engines are that the material in reality is abstracted as into the form of expression such as polygon or various curves, are entered in a computer
Row correlation computations simultaneously export the set that the algorithm of final image is realized.In other words, 3D engines are like and established in computer
One " the real world ".
Specifically, in actual applications, the texture coordinate of three-dimensional cable model is calculated using 3D engines, the texture coordinate is
Refer to：The 2 d texture coordinate resided on polygon net vertex, wherein, texture coordinate provides a kind of model surface and texture
Annexation between image, so as to can determine that the position of the affiliated model vertices of texture image pixel, in actual applications, only
Texture image need to be dragged on three-dimensional cable model, you can the three-dimensional cable model of assignment texture image is obtained, by assignment line
The three-dimensional cable model of reason image is submitted to graphics processor and rendered, and generates three-dimensional cable model image.
In summary, the invention discloses a kind of creation method of three-dimensional cable model, to cable basic model, based on electricity
Cable parameter performs each rule in default grammar rule successively, and establishment obtains three-dimensional cable model, will be created using 3D engines
The three-dimensional cable model for building to obtain is submitted to graphics processor and rendered, and generates three-dimensional cable model image.It is possible thereby to see
Go out, the present invention realizes the true reappearance to cable, compared to traditional two-dimentional cable model by creating three-dimensional cable model
Speech, the present invention substantially increase the effect of visualization of cable model.
Optimize above-described embodiment to be further, step S101 is specifically included in above-described embodiment：
S1, to cable basic model, the first rule in default grammar rule, generation first are performed based on cable data
Cable basic model；
S2, the cable model that the first cable basic model is resolved into multiple two-dimensional shapes；
S3, the next rule for presetting the first rule in grammar rule is performed based on cable data, to the multiple of generation
Cable model is further processed, and obtains the second cable basic model；
S4, by that analogy, until having performed the strictly all rules in default grammar rule, create and obtain the three-dimensional cable mould
Type.
Specifically, after program operation, with addition rule, control point is increased to cable basic model；In cable basis mould
Type automatically generates cable tracer after control point is increased according to curve equation；By cable tracer and cable basic model knot
Close, carry out cable splice, and remove the summit of repetition, the cable model for making to obtain after splicing is integrated into one；It is finally comprehensive to use
Addition rule, subtraction rule and transformation rule are finely adjusted to the cable model obtained after splicing, obtain three-dimensional cable model.
Corresponding with above method embodiment, the invention also discloses a kind of establishment system of three-dimensional cable model.
Referring to Fig. 2, a kind of structural representation of the establishment system of three-dimensional cable model disclosed in one embodiment of the invention should
System includes：
Creating unit 201, for cable basic model, being performed successively based on cable data every in default grammar rule
One rule, establishment obtain three-dimensional cable model, wherein, the default grammar rule is the shape grammar being pre-designed；
Wherein cable basic model refers to：The grown form of normal cable, namely cylinder.The cable basic model has
Body is the model data for being built in program bottom, by being configured to model parameter, realizes the setting to cable basic model,
Such as the thickness of model, turning number of degrees etc..
Cable data includes but is not limited to cable voltage class, diameter, bending radius etc..
Default grammar rule is the shape grammar being pre-designed, it is intended to drives two dimensional surface or threedimensional model to be continuously generated electricity
The various details of cable model, the details include：The bending number of degrees of cable, thickness etc., so as to be created that new threedimensional model.
The implication of " driving " is in above-mentioned：Control point is created in space, and is generated and calculated according to the curve of process control point
The control point of establishment is generated a customized curve by method；By the curve and program bottom setting basic model (such as electricity
Cable basic model) combine, by program code, several sub-grids are created, using each sub-grid of establishment, obtain new three
Dimension module.
Curve derivative algorithm is one section of formula, and the formula is specific as follows：
Output_point=P0* (- 0.5*t*t*t+t*t -0.5*t)+P1* (1.5*t*t*t-2.5*t*t+1.0)+
P2*(-1.5*t*t*t+2.0*t*t+0.5*t)+P3*(0.5*t*t*t–0.5*t*t)
In formula, Output_point is referred to：T takes the curve that the Distribution Center obtained during different value is formed；
P0, P1, P2, P3 are respectively the coordinate at four control points of cable basic model, and t value is [0,1].
If it is required that curve passes through tetra- control points of P0, P1, P2 and P3 simultaneously, then need to control for curve arteface
Point, such as P0 to P1 curve is drawn using [2P0-P1, P0, P1, P2], use [P1, P2, P3,2P3-P2] to draw P2
To P3 curve.Specifically, when t linear changes from 0 to 1, curve will be moved to P2 points (t=1) from P1 points (t=0).
Default grammar rule specifically includes：Addition rule, subtraction rule and transformation rule；
Addition rule, for after performing model and performing completion, generating new model；Addition Rule content includes but unlimited
In：Insert, draw high.In the present embodiment, addition rule specifically refers to increase control point to cable basic model, can be in cable
Increase control point before, during and after basic model, to change the trend of cable basic model and length.
Subtraction rule, for being new submodel by the execution model decomposition after performing model and performing completion；Subtraction
Rule content includes but is not limited to：Go convex, decomposition etc..In the present embodiment, subtraction rule refers specifically to remove the control of cable
Point, namely control point is deleted, to change the trend of cable basic model and length.
Transformation rule, for after performing model and performing completion, changing the shape and attribute of the execution model；Conversion rule
Then content includes but is not limited to mobile, rotation, scaling etc..Such as the position of removal cable basic model, cable run is carried out
Adjustment.
Rendering unit 202, for submitting to graphics process by the obtained three-dimensional cable model is created using 3D engines
Device is rendered, and generates three-dimensional cable model image.
3D engines are that the material in reality is abstracted as into the form of expression such as polygon or various curves, are entered in a computer
Row correlation computations simultaneously export the set that the algorithm of final image is realized.In other words, 3D engines are like and established in computer
One " the real world ".
Specifically, in actual applications, the texture coordinate of three-dimensional cable model is calculated using 3D engines, the texture coordinate is
Refer to：The 2 d texture coordinate resided on polygon net vertex, wherein, texture coordinate provides a kind of model surface and texture
Annexation between image, so as to can determine that the position of the affiliated model vertices of texture image pixel, in actual applications, only
Texture image need to be dragged on three-dimensional cable model, you can obtain the three-dimensional cable model of assignment texture image；By assignment line
The three-dimensional cable model of reason image is submitted to graphics processor and rendered, and generates three-dimensional cable model image.
In summary, the invention discloses a kind of establishment system of three-dimensional cable model, to cable basic model, based on electricity
Cable parameter performs each rule in default grammar rule successively, and establishment obtains three-dimensional cable model, will be created using 3D engines
The three-dimensional cable model for building to obtain is submitted to graphics processor and rendered, and generates three-dimensional cable model image.It is possible thereby to see
Go out, the present invention realizes the true reappearance to cable, compared to traditional two-dimentional cable model by creating three-dimensional cable model
Speech, the present invention substantially increase the effect of visualization of cable model.
It is specifically used for for further optimization above-described embodiment, above-mentioned creating unit 201：
To cable basic model, the first rule in default grammar rule, the electricity of generation first are performed based on cable data
Cable basic model；
First cable basic model is resolved into the cable model of multiple two-dimensional shapes；
Next rule of the first rule described in default grammar rule is performed based on cable data, to the multiple of generation
Cable model is further processed, and obtains the second cable basic model；
By that analogy, until having performed the strictly all rules in default grammar rule, establishment obtains three-dimensional cable model.
Specifically, after program operation, with addition rule, control point is increased to cable basic model；In cable basis mould
Type automatically generates cable tracer after control point is increased according to curve equation；By cable tracer and cable basic model knot
Close, carry out cable splice, and remove the summit of repetition, the cable model for making to obtain after splicing is integrated into one；It is finally comprehensive to use
Addition rule, subtraction rule and transformation rule are finely adjusted to the cable model obtained after splicing, obtain three-dimensional cable model.
Finally, it is to be noted that, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or equipment including a series of elements not only include that
A little key elements, but also the other element including being not expressly set out, or also include for this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged
Except other identical element in the process including the key element, method, article or equipment being also present.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (6)
- A kind of 1. creation method of three-dimensional cable model, it is characterised in that including：To cable basic model, each rule in default grammar rule is performed successively based on cable data, establishment obtains three Cable model is tieed up, wherein, the default grammar rule is the shape grammar being pre-designed；The three-dimensional cable model that establishment obtains is submitted into graphics processor using 3D engines to be rendered, generates three-dimensional electricity Cable model image.
- 2. creation method according to claim 1, it is characterised in that it is described to cable basic model, based on cable data Each rule in default grammar rule is performed successively, and establishment, which obtains three-dimensional cable model, to be included：To the cable basic model, the first rule in the default grammar rule is performed based on the cable data, it is raw Into the first cable basic model；The first cable basic model is resolved into the cable model of multiple two-dimensional shapes；Next rule of the first rule described in the default grammar rule is performed based on the cable data, to generation Multiple cable models are further processed, and obtain the second cable basic model；By that analogy, until having performed the strictly all rules in the default grammar rule, establishment obtains the three-dimensional cable model.
- 3. creation method according to claim 1, it is characterised in that the default grammar rule includes：Addition rule, subtract Method rule and transformation rule；The addition rule, for after performing model and performing completion, generating new model；The subtraction rule, for being new submodel by the execution model decomposition after performing model and performing completion；The transformation rule, for after performing model and performing completion, changing the shape and attribute of the execution model.
- A kind of 4. establishment system of three-dimensional cable model, it is characterised in that including：Creating unit, for cable basic model, performing each rules and regulations in default grammar rule successively based on cable data Then, create and obtain three-dimensional cable model, wherein, the default grammar rule is the shape grammar being pre-designed；Rendering unit, graphics processor progress wash with watercolours is submitted to for the obtained three-dimensional cable model will to be created using 3D engines Dye, generates three-dimensional cable model image.
- 5. establishment system according to claim 4, it is characterised in that the creating unit is specifically used for：To the cable basic model, the first rule in the default grammar rule is performed based on the cable data, it is raw Into the first cable basic model；The first cable basic model is resolved into the cable model of multiple two-dimensional shapes；Next rule of the first rule described in the default grammar rule is performed based on the cable data, to generation Multiple cable models are further processed, and obtain the second cable basic model；By that analogy, until having performed the strictly all rules in the default grammar rule, establishment obtains the three-dimensional cable model.
- 6. establishment system according to claim 4, it is characterised in that the default grammar rule includes：Addition rule, subtract Method rule and transformation rule；The addition rule, for after performing model and performing completion, generating new model；The subtraction rule, for being new submodel by the execution model decomposition after performing model and performing completion；The transformation rule, for after performing model and performing completion, changing the shape and attribute of the execution model.
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| CN109214133A (en) * | 2018-11-02 | 2019-01-15 | 国家电网有限公司 | Intelligent substation secondary debugging emulation method and system based on VR technology |
| CN110838167A (en) * | 2019-11-05 | 2020-02-25 | 网易（杭州）网络有限公司 | Model rendering method and device and storage medium |
| CN110838167B (en) * | 2019-11-05 | 2024-02-06 | 网易（杭州）网络有限公司 | Model rendering method, device and storage medium |
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