CN112131724A - Three-dimensional design simulation system and method for knitted product - Google Patents
Three-dimensional design simulation system and method for knitted product Download PDFInfo
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Abstract
The invention discloses a three-dimensional design simulation system and method for a knitted product, and belongs to the technical field of knitted product simulation. The system comprises a fabric tissue library module, a yarn texture library module, a product model library module, a parameter setting module, a process weaving diagram module, a three-dimensional simulation module and a three-dimensional virtual display module; the method designs the pattern area of the whole forming fabric, a process weaving graph is presented in a rectangle, and the non-pattern area is filled with coil types and is not woven for distinguishing, so that the rapid design of the whole pattern is realized; a three-dimensional simulation structure diagram generated by the system is used as a texture 1:1 to be positioned and mapped on the surface of a product model to obtain a three-dimensional virtual display diagram, so that the pattern effect of a formed product is simulated more accurately; a MapReduce programming mode is adopted, the task is automatically divided into a plurality of subtasks, the scheduling and distribution of the task in large-scale computing nodes are realized through Map and Reduce, and three-dimensional rapid simulation and real-time display of large patterns of knitted fabrics are realized.
Description
Technical Field
The invention relates to a three-dimensional design simulation system and method for a knitted product, and belongs to the technical field of knitted product simulation.
Background
The development of the knitting technology guides the continuous promotion of new knitting products, the small waste of raw materials, the fit and comfort and the like, so that the knitting products are popular with enterprises and consumers. Knitted forming products are various in variety, comfortable, fit, fashionable and changeable knitted forming products increasingly meet the pursuit of people for fashioning delicate flower patterns, and the market demands for formed sweaters, seamless underwear, seamless pantyhose and other clothes are large. In addition, the knitting technology has been used in the industrial fields of knitting and forming filter materials and the like and in the medical fields of artificial blood vessels and the like, and the application range and the development prospect of knitting and forming products are wide.
With the development of the computer age, the knitting computer aided design system can effectively improve the design efficiency and shorten the product development period by using a computer and a graphic processing device to carry out design work. Currently, there are available in the market the pattern design software M1 PLUS developed by STOLL corporation of Germany, the transverse CAD system such as SDS-ONE APEX developed by SHIMA SEIKI corporation of Japan, the weft-knitting CAD system developed by Mayer & Cie and Terrot, and the WKCAD2.0 warp-knitting CAD system developed by Jiangnan university. In order to further shorten the production cycle of products and reduce the proofing and rework time, the computer aided design system is not limited to the rapid design of knitted fabrics, and the simulation research of knitted fabrics becomes a scientific research hotspot and is gradually developed and applied.
However, the research content and technical inventions for the computer aided design and simulation of the knitting forming products are not many, and most of the computer aided design and simulation are pattern design and two-dimensional simulation (such as the existing CAD system on the market), and the pattern design effect and the application effect of the knitting products cannot be visually checked, and the design is quickly corrected, so that the quick design and production cannot be realized. Therefore, a three-dimensional design simulation system for a knitted and formed product, which integrates pattern design, three-dimensional simulation, three-dimensional virtual display and three-dimensional design, is needed to improve the production efficiency of enterprises and meet high-end customization requirements.
Disclosure of Invention
In order to solve the existing problems, the invention provides a three-dimensional design simulation system of a knitted forming product, which comprises:
the system comprises a fabric tissue library module, a yarn texture library module, a product model library module, a parameter setting module, a process weaving diagram module, a three-dimensional simulation module and a three-dimensional virtual display module;
the system sets the fabric texture library module, the yarn texture library module and the corresponding fabric texture, texture and model parameters in the product model library module through the parameter setting module; the system generates coils at corresponding space coordinate positions according to a process weaving mathematical model in a process weaving pattern module, establishes a three-dimensional matrix S to describe a three-dimensional simulation structure, and endows yarn textures designed in a yarn texture library module to the coils or the tissue surface by a particle system model method to obtain a three-dimensional simulation pattern of a knitting forming product.
Optionally, the fabric weave library module is divided into a weft knitting fabric weave library and a warp knitting fabric weave library, and is used for storing and selecting knitting basic weave, knitting change weave, design and color weave and self-defined new weave; weave mathematical model of various fabric weaves in two-dimensional matrix TmnRepresents:
m is 1 and 2, the values 1 and 2 respectively represent a weft knitting fabric tissue bank and a warp knitting fabric tissue bank, and n represents the tissue of the corresponding code in each tissue bank; w and h represent the width and height of the tissue, ti,jFor the i-th row of the fabric weave pattern library moduleThe coil type code of row j.
Optionally, the process weaving pattern module is configured to display a process weaving pattern according to the set width and height of the weaving pattern; a process weaving mathematical model two-dimensional matrix K is established in the process weaving diagram module:
w and H represent the width and height of the weave pattern, respectively, and ki,jAnd marking the coil type of the ith column and the jth row in the process weaving pattern module.
Optionally, the process knitting drawing is presented in a rectangle, and the non-pattern area is filled with the coil type for distinguishing, so as to realize the overall pattern design of the knitting forming product.
Optionally, the three-dimensional simulation module is configured to display a three-dimensional simulation graph of the fabric, where the three-dimensional simulation graph is obtained by generating coils at corresponding spatial coordinate positions according to a process knitting mathematical model, and establishing a three-dimensional matrix S to describe three-dimensional simulation structure information, where the three-dimensional matrix S is:
wherein the content of the first and second substances,
the code number of the coil type value point of the ith row and the jth line is ki,jThe coil space type value point coordinates.
Optionally, the product model library module establishes various product original models by using model design software and derives corresponding OBJ files, where the OBJ files include texture coordinates and size data of the product model.
The invention also provides a three-dimensional design simulation method of the knitted forming product, which adopts the three-dimensional design simulation system of the knitted forming product to simulate, and comprises the following steps:
generating coils at corresponding space coordinate positions according to a process weaving mathematical model in a process weaving pattern module, establishing a three-dimensional matrix S to describe a three-dimensional simulation structure, endowing yarn textures designed in a yarn texture library module to the coils or the tissue surface by a particle system model method, and obtaining a three-dimensional simulation pattern of a knitting forming product.
Optionally, the method for establishing the yarn texture library in the three-dimensional design simulation system of the knitted forming product includes:
scanning the real yarn: scanning various yarns by a scanner under black and white backgrounds, extracting real yarn textures under the black and white backgrounds, and inputting and storing corresponding real yarn data, wherein the real yarn data comprises yarn names, components, fineness, yarn number and twist;
manufacturing a virtual yarn: classifying the obtained scanning yarns according to yarn types, obtaining rules of different types of yarns, and generating virtual yarns with virtual textures, thicknesses and twists;
simulation of yarn reality: on the basis of the virtual yarn, secondary design and simulation are carried out on the color, the fineness, the hairiness length and the twist of the virtual yarn, and the yarn realistic texture meeting the requirements is generated through a particle system model in the space.
Optionally, the method includes:
the method comprises the following steps: establishing an initial pattern;
step two: determining a product model to be displayed;
step three: setting the width and height of a process weaving pattern, the size of the product model, the fabric transverse and longitudinal density and the threading information according to the product model; the process weaving pattern is presented in a rectangle all the time, the width of the weaving pattern is the maximum width of the product model, and the height of the weaving pattern is the maximum height of the product model;
step four: selecting a needed tissue, and filling the selected tissue into a specified area;
step five: selecting yarn textures and raw materials which are close to those adopted in actual machine weaving, inputting parameter information of the raw materials, wherein the parameter information comprises types, colors and thicknesses, and designing hairiness and twist;
step six: yarn texture, hairiness and twist are reflected in the fabric three-dimensional simulation module and the three-dimensional virtual display module through a particle system model in the space, and a fabric three-dimensional simulation structure diagram and a three-dimensional product model display diagram are respectively generated.
Optionally, the method further includes:
when the organizational structure and the texture in the three-dimensional simulation structure chart need to be changed, the corresponding texture is selected from the fabric organizational module library to replace the texture of the designated area, and the system takes the modified three-dimensional simulation chart as the texture 1:1 to be positioned and mapped on the surface of the sleeveless sweater forming model to be displayed in real time.
The invention has the beneficial effects that:
1. the design simulation system provided by the invention is provided with a fabric tissue library, a product model library and a yarn texture library, wherein the fabric tissue library and the product model library can realize quick calling of tissues and models, can store new fabric tissues after self design definition, and can also introduce new models and modify the sizes of the models. The yarn texture library can guide the scanned yarn texture, design the parameters of the raw materials and endow the fabric with a three-dimensional simulation appearance sense of reality by utilizing a particle system model.
2. The design simulation system of the invention is different from the prior art in design simulation method aiming at knitting forming products, the design is not local design, but the whole forming fabric pattern area is designed, the process weaving pattern is presented in rectangle, the filling coil type of the non-pattern area is not distinguished (coil code number 0), and the rapid design of the whole pattern of the knitting forming products is realized.
3. The three-dimensional simulation structure chart only simulates a flower-shaped area through recognizing the process woven chart, the three-dimensional simulation and the three-dimensional virtual display are synchronously displayed, the simulation structure can be designed and modified in a three-dimensional state, and the real-time viewing is carried out until a satisfactory virtual display effect is achieved, so that the problems that the simulation and the display cannot be linked in the conventional auxiliary design system and the design still stays on a two-dimensional layer are solved, and the three-dimensional design and the simulation in a real sense are realized.
4. The three-dimensional virtual display diagram is formed by taking a three-dimensional simulation structure diagram generated by a system as a texture 1:1 positioning mapping on the surface of a product model, and is different from a four-side continuous mapping in the prior art, the pattern position designed by the method is more absolute, the pattern effect of a final formed product can be more accurately simulated, the requirement of a consumer on the pattern type can be further met, and the satisfaction degree of the consumer is improved.
5. The invention utilizes the parallel computing technology of the cloud computing technology, adopts a MapReduce programming mode, automatically divides a task into a plurality of subtasks, realizes the scheduling and distribution of the task in a large-scale computing node through two steps of Map and Reduce, and provides a new method for realizing three-dimensional rapid simulation and real-time display of a large-pattern knitted fabric by using the flexible and extensible capability of cloud computing.
6. Different from the process weaving graph information one-way generation simulation graph in the prior art, the design simulation system of the invention can output process weaving information data in a reversible way and export an on-machine file for weaving after modifying and determining the organization structure in the three-dimensional simulation module, and realizes three-dimensional design according to the real-time virtual display effect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is an overall architecture diagram of a three-dimensional design simulation system of a knitted formed product according to an embodiment of the present invention.
Fig. 2 is a relational block diagram of a three-dimensional design simulation system of a knitted fabric according to an embodiment of the present invention.
Fig. 3 is a flowchart of a three-dimensional design simulation method of a knitted and formed product according to an embodiment of the present invention.
FIG. 4 is a schematic illustration of a process knitting for designing and simulating a sleeveless sweater according to an embodiment of the invention.
FIG. 5 is a three-dimensional simulation block diagram of the design and simulation of a sleeveless sweater in accordance with one embodiment of the present invention.
FIG. 6 is a three-dimensional virtual representation of a sleeveless shaped sweater design and simulation, in front elevation, right side elevation, and left side elevation, according to one embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The first embodiment is as follows:
the present embodiment provides a three-dimensional design simulation system of a knitted forming product, referring to fig. 1, the system including:
the system comprises a fabric tissue library module, a yarn texture library module, a product model library module, a parameter setting module, a process weaving diagram module, a three-dimensional simulation module and a three-dimensional virtual display module;
the fabric tissue library module is used for storing and selecting knitting basic tissues, knitting change tissues and pattern tissues and is divided into a weft knitting fabric tissue library and a warp knitting fabric tissue library. The knitting basic structure is divided into a weft knitting basic structure and a warp knitting basic structure; the basic weft-knitting structure comprises a weft plain stitch, a rib stitch, a cotton wool structure, a links-stitch structure, a warp plain structure, a satin structure, a double-back structure and the like, and the basic warp-knitting structure comprises a chaining structure, a warp plain structure, a warp satin structure, a double-warp structure and the like. The knitting variation is the combination of the knitting basic stitch. The design and color textures are also divided into weft knitting design and color textures and warp knitting design and color textures, wherein the weft knitting design and color textures comprise jacquard weave, tuck weave, plating weave, lining weave, transfer weave and the like, and the warp knitting design and color textures comprise pad missing weave, lining weave, yarn pressing weave, jacquard weave, miss-pressing weave and the like.
As shown in fig. 2, a user sets parameters of corresponding fabric tissues, textures and models in a fabric tissue library module, a yarn texture library module and a product model library module through a parameter setting module so that the three-dimensional simulation module selects corresponding fabric tissues, textures and models according to the corresponding parameters when simulating, meanwhile, the three-dimensional simulation module is connected with a process weaving map module and a three-dimensional virtual display module, a process weaving mathematical model in the process weaving map module generates coils at corresponding space coordinate positions, a three-dimensional matrix S is established to describe a three-dimensional simulation structure, the yarn texture designed in the yarn texture library module is endowed to the coil or tissue surface through a particle system model method to obtain a three-dimensional simulation map of a knitted forming product, then the three-dimensional simulation map of the knitted forming product is displayed through the three-dimensional virtual display module, so that the user can directly view a virtual display effect, if some places do not meet the design requirements, corresponding parameters can be directly modified through the parameter setting module until a satisfactory design effect is obtained.
The establishment of the fabric tissue library is realized by customizing and storing the knitting basic tissue, the knitting change tissue and the design and color tissue, establishing the tissue mathematical model of various fabric tissues and using a two-dimensional matrix TmnAnd (4) showing. Meanwhile, new tissues can be defined by tissue design and stored in corresponding fabric tissue libraries as required, so that subsequent calling is facilitated.
Two-dimensional matrix TmnComprises the following steps:
in the formula: m is 1 and 2, 1 and 2 represent weft knitting fabric tissue bank and warp knitting fabric tissue bank respectively, n is 1,2,3 … … represents the tissue of corresponding code number in each tissue bank, such as T11And a weave mathematical model representing the weave No. 1 in the weft-knitted fabric weave library. w and h represent the width and height of the tissue, ti,jThe coil type in the ith column and the jth row in the fabric weave library module is coded.
The yarn texture library module is used for storing and selecting various scanned yarns including spun yarns, chemical fiber filaments, fancy yarns and the like. The variety, color, fineness, hairiness, twist and the like of the used raw materials can be designed, and the three-dimensional simulation effect of the fabric can be influenced by the design.
The establishment of the yarn texture library mainly comprises three steps of scanning real yarns, manufacturing virtual yarns and simulating yarn reality. The scanning of the real yarn is to scan the common fineness of the short fiber yarn, the filament yarn, the fancy yarn and the like under black and white backgrounds by a scanner, extract the texture of the real yarn under the black and white backgrounds, and input and store the corresponding real yarn data such as yarn name components, fineness, yarn strand number, twist and the like. The step of manufacturing the virtual yarns is to classify the obtained scanning yarns according to the yarn types, summarize the corresponding yarn rules and generate the virtual yarns with certain virtual textures, thickness and twist. The yarn reality simulation is to perform secondary design and simulation on the color, the fineness, the hairiness length, the twist and the like of the virtual yarn on the basis of the virtual yarn, and generate the yarn reality texture meeting the requirement through a particle system model in the space.
The product model library module is used for storing and selecting various formed product models, including garment models such as a formed sweater model, a seamless underwear model, a seamless pantyhose model, a formed vamp, a formed knee and wrist protecting model, industrial models such as a knitting biaxial filter screen cylindrical model, medical models such as an artificial blood vessel and the like.
The product model library is mainly used for establishing various product original models by using other model design software such as 3DMAX, 3DCLO and the like and deriving corresponding OBJ files, wherein the OBJ files comprise texture coordinates, size data and other information of the product models.
And the parameter setting module is used for setting information such as width and height of the process weaving pattern, size of the product model, fabric transverse and longitudinal density, fabric threading and the like.
And the process weaving pattern module is used for displaying the process weaving pattern according to the set width and height of the weaving pattern, and establishing a two-dimensional matrix K of a process weaving mathematical model in order to realize the design and three-dimensional simulation of the process weaving pattern by using the tissues in the fabric tissue library. The coil type at the current position can be replaced by selecting the coil type through a left mouse button, the required tissue can be selected in the fabric tissue library module to perform tissue tiling and filling in a designated area, and operations such as designated area moving, mirror image copying and pasting can also be performed.
In the formula: w and H represent the width and height of the weave pattern, respectively, and ki,jAnd marking the coil type of the ith column and the jth row in the process weaving pattern module.
And the three-dimensional simulation module is used for displaying a three-dimensional simulation graph of the fabric, wherein the three-dimensional simulation graph is formed by generating coils at corresponding space coordinate positions according to the process weaving mathematical model and establishing a three-dimensional matrix S to describe three-dimensional simulation structure information. In the three-dimensional simulation, the coils are connected left and right and sleeved up and down, and the yarn textures designed in the yarn texture library are endowed to the surfaces of the coils or the tissues by a particle system model method, so that the realistic appearance of the fabric can be simulated.
Wherein the content of the first and second substances,
the code number of the coil type value point of the ith row and the jth line is ki,jThe coil space type value point coordinates.
The three-dimensional simulation can control the simulation diagram to rotate 360 degrees through a right mouse button, and the fabric texture and the yarn texture can be modified in the three-dimensional simulation process. In the process of modifying the three-dimensional simulation organizational chart, the coil type at the current position of the three-dimensional simulation chart can be replaced by selecting the coil type through the left mouse button, the system can identify and read the coil type code number selected by the left mouse button, judge that the coordinates of the target modification position on the three-dimensional simulation chart are positioned in the i column and the j row in the three-dimensional simulation structure model matrix, and use the new coordinates of the coil space type value point coordinates
Replacement of
(k’i,jIndicates a new coil type, ki,jRepresenting the type of the previous coil), and drawing a three-dimensional simulation graph again according to the three-dimensional simulation structure model and the yarn texture information.
And the yarn texture which meets the actual requirement is newly manufactured and designed in the yarn texture library, the threading information is input in the parameter setting module, and the set yarn texture can be mapped to the surface of the three-dimensional simulation structure chart through a particle system model in the space according to the threading information, so that the sense of reality of the fabric is enhanced.
The spring-mass point model is adopted in the three-dimensional simulation, so that the detailed characteristics of the cloth, such as fold deformation and the like, can be enriched, and the authenticity of the simulation effect can be greatly improved. The method comprises the steps of independently calculating stress of each mass point by using cloud computing, dividing each mass point into pieces in MapReduce, processing stress calculation, numerical solution and collision detection and response of each mass point by parallel computing, dividing pattern data in ASP.NET (background), transmitting the data to HDFS (Hadoop platform) for storage, and performing parallel computing on the divided data by using a MapReduce model. For the stretching model in the spring-mass point model, because each mass point receives larger association of adjacent mass points, the computation time is not reduced because the communication between services is increased when parallel computation is adopted, and the stretching process is computed as a whole. After the deformation of the fabric is completed by using a spring-mass point model in the fabric simulation, the position of each mass point and the shape of each coil in the fabric are simulated by using a particle system on the basis, each coil can be separately calculated, each coil is divided, and the simulation of the yarn by using the particle system is processed by using parallel calculation. And finally, returning the coordinates, brightness, size and color of particles in the fabric after all cloud computing is completed, transmitting the result to a foreground in a file mode, and rendering by using WebGL to obtain the three-dimensional simulation effect of the fabric.
And the three-dimensional virtual display module is used for displaying a three-dimensional virtual display model, the three-dimensional virtual display model is selected from the product module library, the size of the model can be modified in the parameter setting module, the three-dimensional simulation diagram is mapped on the model in a ratio of 1:1 by adopting a texture mapping method, the model can be controlled to rotate for 360 degrees by a left mouse button, and a user can view the three-dimensional virtual display model in an all-round way.
Example two
The embodiment provides a three-dimensional design simulation method of a knitted and formed product, which is used for simulating by using the three-dimensional design and simulation system of the knitted and formed product provided by the embodiment I, and comprises the following steps:
s1, creating a new pattern after a user logs in an interface, selecting different types, machine numbers and needle bed configurations, inputting parameter information such as the width and the height of the pattern, and creating an initial pattern;
the system can automatically generate an initial organization according to the model and the needle bed configuration selected by the user. The needle bed of the single-side machine is configured to be zero, and the initial tissue is weft plain stitch tissue; the needle bed configuration of the double-sided machine is divided into rib configuration and cotton wool configuration, and the initial tissues are rib tissues and cotton wool tissues respectively.
S2, entering a process weaving pattern module after the user creates a new pattern, and before designing the module, selecting a product model to be displayed in a product model library by the user;
a user can use 3D model making software to make a required model and import the system to be stored in a product model library module, so that subsequent calling is facilitated. The sizes of the models in the product model library can be changed, and the product model library is suitable for clothes with different specifications and human bodies with different body types.
S3, setting parameters such as width and height of a process knitting diagram, size of a product model, fabric transverse and longitudinal density, threading information and the like according to the selected product model in the parameter setting module by a user;
because the sizes of all positions of the product model are different, the process weaving graph in the system is presented in a rectangular shape all the time, the width of the weaving graph is the maximum width of the product model, and the height of the weaving graph is the maximum height of the product model.
S4, a user can click and select a coil graphic primitive to be pasted at a designated position in the process woven graph module, can also select a required tissue in the fabric tissue library module, fills the selected tissue into a designated area, and can perform operations such as designated area movement, mirror image copying and pasting and the like to complete the primary design of the fabric process woven graph;
the user can design and define new organizations to be stored in the fabric organization library according to the needs, and the subsequent calling is convenient. In the weave pattern design of the variable-size model, a weave pattern region of an extra width or height is denoted by a designated stitch number 0.
S5, selecting yarn textures and raw materials close to those adopted in actual machine weaving in the yarn texture library module by a user, inputting the types, colors and thicknesses of the raw materials, and designing parameter information such as hairiness and twist;
the information of yarn texture, hairiness, twist and the like is reflected on a three-dimensional simulation diagram and a three-dimensional virtual display diagram of the fabric through a particle system model in the space, so that the sense of reality of the fabric and the yarn is reflected.
S6, a user clicks a simulation button, the system synchronously generates a fabric three-dimensional simulation structure diagram and a three-dimensional product model display diagram according to the process weaving information, and the three-dimensional simulation module and the three-dimensional virtual display module are simultaneously displayed in a system interface;
due to the fact that the number of the coils is large, the calculation amount is large, the system applies a cloud computing technology, a MapReduce model is used for conducting parallel operation, the data segmentation and task division characteristics of the parallel computation in the cloud computing are analyzed, the data are segmented according to the characteristics of knitted fabric simulation and display, the calculation tasks are distributed on a plurality of nodes of a cloud platform, and rapid operation and graphic interaction of three-dimensional knitting simulation and virtual display are achieved in the platform. The fabric three-dimensional simulation structure diagram is stored in a Canvas in a texture diagram form 1:1, the content on the Canvas is mapped to the surface of a product model of three-dimensional virtual display as the texture 1:1, the three-dimensional simulation structure diagram and the three-dimensional virtual display diagram can both rotate by 360 degrees, and a user can view the design effect in all directions.
S7, according to the real-time effect displayed in the three-dimensional virtual display module, a user can use a mouse to click the coil type to modify the coil structure at the current position of the three-dimensional simulation structure chart, and can also select an organization in a fabric organization module library to perform organization replacement on the specified area of the three-dimensional simulation structure chart until a satisfactory virtual display effect is achieved;
once the three-dimensional simulation structure chart is modified, the system adopts a method of positioning texture mapping, and immediately maps the three-dimensional simulation chart on the surface of a product model as the 1:1 positioning of the texture, so as to achieve the three-dimensional design of a knitted product in the real sense.
And S8, reversely outputting process weaving information data by a user according to the three-dimensional simulation structure information after the final design modification, generating and exporting a computer-on file, and weaving on a computer to obtain a finished product similar to that in the virtual display module.
The process weaving information and the three-dimensional simulation structure information can be mutually converted, and the three-dimensional simulation structure diagram can only generate a three-dimensional virtual display texture diagram in a one-way mode for display.
EXAMPLE III
The present embodiment provides a practical case of a three-dimensional design simulation method for a knitted and formed product, which takes a sleeveless sweater as an example, and performs simulation by using the three-dimensional design and simulation system for the knitted and formed product provided in the first embodiment, and performs design simulation according to the method described in the second embodiment, specifically:
s1, a user logs in a knitting forming product design and simulation system to newly create a pattern, CMS530[0] with the model of STOLL is selected, the width of the machine is 1270mm, the machine number is 7.2 needles/inch, the needle pitch is 1.81mm, the initial wale with the width of 100 is input, and the wale with the height of 100 is initialized. After the parameter information is input, the system can automatically generate an initial organization according to the selected model and the needle bed configuration. The machine type in this embodiment is a double-sided machine, the needle bed configuration is a cotton-wool configuration, and the obtained initial tissue is a cotton-wool tissue.
S2, the user selects a product model from the product model library according to the product requirement, and the sleeveless sweater garment model is selected in the embodiment.
S3, correcting the size of the product model according to the actual size of the human body in the parameter setting module by a user, wherein the two-dimensional size of the sleeveless sweater forming clothes model in the embodiment is 570mm in length, 410mm in width of the lower hem, 390mm in waist, 420mm in chest circumference, 350mm in shoulder width, 150mm in collar depth, 35mm in shoulder drop and 200mm in shoulder hanging; the longitudinal density of the fabric is 58 wales/10 cm, and the transverse density is 44 courses/10 cm; the new process width is about 244 × 2 to 488 columns and the process height is about 251 rows according to the parameter information, and the initial tissue is redrawn.
S4, a user can click a coil graphic primitive to be pasted at a designated position by using a left mouse button in the process woven graph module, can select a required tissue in the fabric tissue library module, fills the selected tissue into a designated area, and can perform operations of designated area movement, mirror image copying and pasting and the like to complete the preliminary design of the fabric process woven graph. For some common organizations which are not in the fabric organization library module, new organizations can be designed and defined by self to be stored in the fabric organization library, so that the subsequent calling is convenient. Since the sleeveless sweater in this embodiment has various sizes of portions and belongs to a variable-size model, the knitting diagram area of the extra portion is filled with a predetermined stitch type "no knit" (stitch number 0) in the knitting diagram design.
As shown in the schematic process knitting diagram in fig. 3, zone 1 is a pattern knitting zone; region 2 is a non-woven region and the region 2 portion will not participate in the three-dimensional simulation.
S5, selecting yarn textures and raw materials which are close to those adopted in actual on-machine weaving in a yarn texture library by a user, wherein the raw materials used in the on-machine weaving in the embodiment are blue and white 30/2S wool, double-strand wool yarn textures are selected in the yarn texture library, color and yarn fineness are input, the yarn textures can generate new color yarn textures according to the input color, hairiness is set to be short hairiness, the twisting direction is S twist, the twist degree is 180 twist/m, and the system reflects the information of the yarn textures, the hairiness, the twist degree and the like on a three-dimensional simulation graph and a three-dimensional virtual display graph of the fabric through a particle system model in a space, so that the sense of reality of the fabric and the yarn is reflected.
S6, clicking a simulation diagram button by a user, performing parallel operation by using a MapReduce model by the system by using a cloud computing technology, analyzing the characteristics of data segmentation and task division of the parallel operation in the cloud computing, segmenting data according to the characteristics of simulation and display of knitted fabrics, distributing computing tasks on a plurality of nodes of a cloud platform, and realizing rapid operation and graphic interaction of three-dimensional simulation and virtual display of knitting in the platform. As shown in fig. 3, the system synchronously generates a fabric three-dimensional simulation structure diagram according to process weaving information, yarn texture information, parameter information and the like through a cloud computing technology and displays the fabric three-dimensional simulation structure diagram in a three-dimensional simulation module, stores the three-dimensional simulation structure diagram in a Canvas in a texture diagram form 1:1, and maps the content on the Canvas to the surface of a sleeveless formed sweater model which is virtually displayed in a three-dimensional mode as the texture 1: 1. The three-dimensional simulation module (left side) and the three-dimensional virtual display module (right side) are displayed in the system interface simultaneously and can rotate 360 degrees, and a user can view a design result in an all-round mode.
S7, according to the real-time effect displayed in the three-dimensional virtual display module on the right side of the system interface, the user can use the mouse to click the coil type in the three-dimensional simulation module on the left side of the interface to modify the coil structure of the current position of the three-dimensional simulation structure diagram, and can also select the tissue in the fabric tissue module library to perform tissue replacement on the specified area of the three-dimensional simulation structure diagram. Once the three-dimensional simulation structure chart is modified, the modified three-dimensional simulation chart is immediately and directly used as texture 1:1 to be positioned and mapped on the surface of the sleeveless formed sweater model to be displayed in real time until a satisfactory virtual display effect is achieved, and the three-dimensional design of the knitted product in the real sense is completed.
And S8, reversely outputting process knitting information data by a user according to the three-dimensional simulation structure information after the final design modification, generating and deriving a machine-on file, and weaving on a machine to obtain a finished sleeveless formed sweater similar to that in the virtual display module.
Some steps in the embodiments of the present invention may be implemented by software, and the corresponding software program may be stored in a readable storage medium, such as an optical disc or a hard disk.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A three-dimensional design simulation system for a knitted shaped product, the system comprising:
the system comprises a fabric tissue library module, a yarn texture library module, a product model library module, a parameter setting module, a process weaving diagram module, a three-dimensional simulation module and a three-dimensional virtual display module;
the system sets the fabric texture library module, the yarn texture library module and the corresponding fabric texture, texture and model parameters in the product model library module through the parameter setting module; the system generates coils at corresponding space coordinate positions according to a process weaving mathematical model in a process weaving pattern module, establishes a three-dimensional matrix S to describe a three-dimensional simulation structure, and endows yarn textures designed in a yarn texture library module to the coils or the tissue surface by a particle system model method to obtain a three-dimensional simulation pattern of a knitting forming product.
2. The system of claim 1, wherein the fabric weave library module is divided into a weft knitting fabric weave library and a warp knitting fabric weave library for storing and selecting a knitting basic weave, a knitting change weave, a pattern weave and a self-defined new weave; weave mathematical model of various fabric weaves in two-dimensional matrix TmnRepresents:
m is 1 and 2, the values 1 and 2 respectively represent a weft knitting fabric tissue bank and a warp knitting fabric tissue bank, and n represents the tissue of the corresponding code in each tissue bank; w and h represent the width and height of the tissue, ti,jThe coil type in the ith column and the jth row in the fabric weave library module is coded.
3. The system of claim 2, wherein the artwork map module is configured to display an artwork map according to a set artwork width height; a process weaving mathematical model two-dimensional matrix K is established in the process weaving diagram module:
w and H represent the width and height of the weave pattern, respectively, and ki,jAnd marking the coil type of the ith column and the jth row in the process weaving pattern module.
4. The system of claim 3, wherein the technical weave pattern is presented in a rectangle and the non-patterned areas fill the stitch pattern to differentiate the stitch type to achieve an overall pattern design for the knit formed product.
5. The system of claim 4, wherein the three-dimensional simulation module is configured to display a three-dimensional simulation graph of the fabric, the three-dimensional simulation graph is generated by generating coils at corresponding spatial coordinate positions according to a process knitting mathematical model, and a three-dimensional matrix S is established to describe three-dimensional simulation structure information, the three-dimensional matrix S is:
wherein the content of the first and second substances,
the code number of the coil type value point of the ith row and the jth line is ki,jThe coil space type value point coordinates.
6. The system of claim 5, wherein the product model library module builds various types of product original models by using model design software and derives corresponding OBJ files, and the OBJ files comprise texture coordinates and size data of the product models.
7. A three-dimensional design simulation method of a knitted product, characterized in that the method is simulated by using the three-dimensional design simulation system of the knitted product according to any one of claims 1 to 6, and the method comprises:
generating coils at corresponding space coordinate positions according to a process weaving mathematical model in a process weaving pattern module, establishing a three-dimensional matrix S to describe a three-dimensional simulation structure, endowing yarn textures designed in a yarn texture library module to the coils or the tissue surface by a particle system model method, and obtaining a three-dimensional simulation pattern of a knitting forming product.
8. The method of claim 7, wherein the method for creating the yarn texture library in the three-dimensional design simulation system of the knitted forming product comprises the following steps:
scanning the real yarn: scanning various yarns by a scanner under black and white backgrounds, extracting real yarn textures under the black and white backgrounds, and inputting and storing corresponding real yarn data, wherein the real yarn data comprises yarn names, components, fineness, yarn number and twist;
manufacturing a virtual yarn: classifying the obtained scanning yarns according to yarn types, obtaining rules of different types of yarns, and generating virtual yarns with virtual textures, thicknesses and twists;
simulation of yarn reality: on the basis of the virtual yarn, secondary design and simulation are carried out on the color, the fineness, the hairiness length and the twist of the virtual yarn, and the yarn realistic texture meeting the requirements is generated through a particle system model in the space.
9. The method of claim 8, wherein the method comprises:
the method comprises the following steps: establishing an initial pattern;
step two: determining a product model to be displayed;
step three: setting the width and height of a process weaving pattern, the size of the product model, the fabric transverse and longitudinal density and the threading information according to the product model; the process weaving pattern is presented in a rectangle all the time, the width of the weaving pattern is the maximum width of the product model, and the height of the weaving pattern is the maximum height of the product model;
step four: selecting a needed tissue, and filling the selected tissue into a specified area;
step five: selecting yarn textures and raw materials which are close to those adopted in actual machine weaving, inputting parameter information of the raw materials, wherein the parameter information comprises types, colors and thicknesses, and designing hairiness and twist;
step six: yarn texture, hairiness and twist are reflected in the fabric three-dimensional simulation module and the three-dimensional virtual display module through a particle system model in the space, and a fabric three-dimensional simulation structure diagram and a three-dimensional product model display diagram are respectively generated.
10. The method of claim 9, further comprising:
when the organizational structure and the texture in the three-dimensional simulation structure chart need to be changed, the corresponding texture is selected from the fabric organizational module library to replace the texture of the designated area, and the system takes the modified three-dimensional simulation chart as the texture 1:1 to be positioned and mapped on the surface of the sleeveless sweater forming model to be displayed in real time.
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