CN113240818A - Method for simulating and displaying dummy model clothes - Google Patents
Method for simulating and displaying dummy model clothes Download PDFInfo
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- CN113240818A CN113240818A CN202110474856.2A CN202110474856A CN113240818A CN 113240818 A CN113240818 A CN 113240818A CN 202110474856 A CN202110474856 A CN 202110474856A CN 113240818 A CN113240818 A CN 113240818A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T19/00—Manipulating 3D models or images for computer graphics
- G06T19/006—Mixed reality
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T19/00—Manipulating 3D models or images for computer graphics
- G06T19/20—Editing of 3D images, e.g. changing shapes or colours, aligning objects or positioning parts
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2210/00—Indexing scheme for image generation or computer graphics
- G06T2210/16—Cloth
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2210/00—Indexing scheme for image generation or computer graphics
- G06T2210/44—Morphing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2219/00—Indexing scheme for manipulating 3D models or images for computer graphics
- G06T2219/20—Indexing scheme for editing of 3D models
- G06T2219/2021—Shape modification
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Abstract
The invention discloses a method for simulating and displaying a dummy model garment, which comprises the steps of S100, through data stored in a memory of a computer; s200, a computer of a dummy model with a representation of the seam line, with a surface represented by data stored in a memory; s300, placing the clothing piece on the surface of the model; s400, connecting the clothes pieces together along the seam lines of the clothes pieces, wherein the selected deformation is the deformation of space, not only the deformation of the fabric. Thus, each point is displaced according to its position in three dimensions, rather than as a function of the position relative to its neighbors. The deformations may then be selected to conform to the topological relationship of euclidean space. The result of this choice is that it is not necessary to calculate fabric collisions: the lining can no longer penetrate the cloth, the sleeves no longer touch the small sides, the garment can no longer penetrate the dummy, and the choice is dense enough to make the spatial deformation around the basic triangle considered linear.
Description
Technical Field
The invention relates to the technical field of garment effect simulation calculation, in particular to a method for simulating and displaying a dummy model garment.
Background
At present, the styles of the human body model toys are various, the appearance of each human body model toy is different greatly, and in order to enable the appearance of the human body model toys to be expressed more like the human body, written filling cotton or cloth is filled at the more prominent parts (such as pectoral muscles, abdominal muscles and dorsal muscles) of the human body when a toy coat is manufactured, so that the coat of the human body model toys is more vivid and has stronger texture.
The apparel industry is increasingly using databases where apparel is archived or indexed in two dimensions. The goal is to use the data contained in these databases to simulate the finishing of a dummy without having to finish on a "real" traditional dummy, which represents about 1.5 square meters (m) of fabric (shirt). The average mesh size was 1 square centimeter (cm2), and the garment mesh contained about 15,000 elements. Each calculation step requires measuring the force applied to each element, and therefore at least the distance between it and the adjacent element (warp, weft and shear), representing 12 subtractions, 12 multiplications, and most importantly 4 square root extracts in 3D. Thus, for each time step, at least about 60,000 square root extractions and 180,000 multiplications need to be performed.
The computational expansion is very complex, it involves identifying corresponding feature points on the dummy and on each garment, and calculating the length of a feature arc through some of the feature points. For example, the characteristic arc passes through the neck, shoulder or chest.
The complexity of the calculations and the length of the calculation time also have a significant influence on the formation of the parts by cutting them out of a textile fabric or some other material, for which purpose a method of simulating and displaying a dummy model garment is proposed.
Disclosure of Invention
The present invention is directed to a method for simulating and displaying a dummy model garment to solve the problems set forth in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a method of simulating and displaying a dummy model garment, comprising:
s100, data stored in a memory of a computer are passed;
s200, a computer of a dummy model with a representation of the seam line, with a surface represented by data stored in a memory;
s300, placing the clothing piece on the surface of the model;
s400, connecting the garment pieces together along the seam lines of the garment pieces;
s500, relaxing each clothing sheet from the position of the clothing sheet on the surface of the dummy model to the balance position of the clothing sheet on the dummy model; .
The invention is further preferred: -establishing a bijective and continuous relationship between at least a portion of the piece of clothing and a corresponding portion of the surface of the virtual model, -placing the piece of clothing on the surface of the virtual model by establishing a bijective and continuous relationship between points representing the piece of clothing and points on the corresponding portion of the surface of the virtual model.
The invention is further preferred: triangulation of the garment piece; and the triangle of the part is deformed to conform to the projection.
The invention is further preferred: the triangulation of the component is deformed by: displacing a point defining a contour of the component to a point on a contour of the projection; and moves the point that is the vertex of the triangle within the pawn's outline.
The invention is further preferred: the triangulation deforms while satisfying the constraints whereby the triangulated triangle of the part is not flipped.
The invention is further preferred: subdividing the garment panel into a first set of portions; and deforming the set of portions while minimizing an energy function of the garment piece, subdividing the garment piece into a second set of portions smaller than the portions of the first set; and deforming the second set of portions while minimizing an energy function of the garment.
The invention is further preferred: the energy function represents the traction energy of the garment panel, which is calculated in two dimensions with respect to the position of the panel and is a function of the value of the stiffness K of the fabric.
The invention is further preferred: said pre-storing of data corresponding to said field lines, said parts of said first and second set of parts being connection areas of said garment piece.
Compared with the prior art, the invention has the beneficial effects that:
the deformation selected is a deformation in space and not just a deformation of the fabric. Thus, each point is displaced according to its position in three dimensions, rather than as a function of the position relative to its neighbors. The deformations may then be selected to conform to the topological relationship of euclidean space. The result of this choice is that it is not necessary to calculate fabric collisions: the lining can no longer penetrate the cloth, the sleeves no longer touch the small sides, the garment can no longer penetrate the dummy, and the choice is dense enough to make the spatial deformation around the basic triangle considered linear.
Drawings
FIG. 1 is a schematic view of the flow structure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
the invention provides a method for simulating and displaying a dummy model garment as shown in figure 1, which comprises the following steps:
s100, data stored in a memory of a computer are passed;
s200, a computer of a dummy model with a representation of the seam line, with a surface represented by data stored in a memory;
s300, placing the clothing piece on the surface of the model;
s400, connecting the garment pieces together along the seam lines of the garment pieces;
s500, relaxing each clothing sheet from the position of the clothing sheet on the surface of the dummy model to the balance position of the clothing sheet on the dummy model; .
In this embodiment, specifically: -establishing a bijective and continuous relationship between at least a portion of the piece of clothing and a corresponding portion of the surface of the virtual model, -placing the piece of clothing on the surface of the virtual model by establishing a bijective and continuous relationship between points representing the piece of clothing and points on the corresponding portion of the surface of the virtual model.
In this embodiment, specifically: triangulation of the garment piece; and the triangle of the part is deformed to conform to the projection.
In this embodiment, specifically: the triangulation of the component is deformed by: displacing a point defining a contour of the component to a point on a contour of the projection; and moves the point that is the vertex of the triangle within the pawn's outline.
In this embodiment, specifically: the triangulation deforms while satisfying the constraints whereby the triangulated triangle of the part is not flipped.
In this embodiment, specifically: subdividing the garment panel into a first set of portions; and deforming the set of portions while minimizing an energy function of the garment piece, subdividing the garment piece into a second set of portions smaller than the portions of the first set; and deforming the second set of portions while minimizing an energy function of the garment.
In this embodiment, specifically: the energy function represents the traction energy of the garment panel, which is calculated in two dimensions with respect to the position of the panel and is a function of the value of the stiffness K of the fabric.
In this embodiment, specifically: said pre-storing of data corresponding to said field lines, said parts of said first and second set of parts being connection areas of said garment piece.
The morphing algorithm used first moves the points of the contour in each step to a new position closer to the desired contour while respecting the constraint of not flipping the triangle, while ensuring that the new contour remains a simple polygon, i.e. it is not self-intersecting; the triangles may be superimposed in two ways: by triangular flipping, i.e. upside down, or the polygon is a complex polygon; then all other points of the triangulation are shifted to the position of the mean around their points, while respecting the constraints of the non-flipped triangle; for each point, calculating the barycenter of its neighbors, and thus the point follows the barycenter;
the layers making up the garment (lining, cloth, neck, etc.) are placed in 3D in successive layers, separated by a thickness small enough to retain biological activity; the thickness is related to the minimum radius of curvature of the surface of the dummy;
more precisely, for each part of the dummy, the thickness between two successive layers is chosen to be very small compared to the radius of curvature of said part of the dummy, and the sum of the successive thicknesses is less than the same radius of curvature; the innermost layer preferably presses against the dummy; in other words, the thickness between the innermost layer and the surface of the dummy is zero;
then, seams or connections between the garment pieces are formed along their seam lines, i.e. points belonging to the seam edges and sides are merged (the double makes it possible to find them); at the end of the step of placing them on the surface of the dummy, this operation is performed on the data representative of the piece;
the purpose of the relaxation is to move each garment towards its equilibrium state. More precisely, due to the topological processing explained above, the energy state of the fabric is initially very high and it is reduced to a value close to the minimum, compatible with the simulation of the emission of the material. Various algorithms are possible, and by directly inserting such models, models that can have various simplifications and/or realisms can be used to simulate the fabric (to handle collisions).
Comparison of various properties of the fabric indicates that the (usually) dominant energy factor (for any displacement) is the traction strength. For typical curvatures, the traction strength is usually at least 100 times greater than the shear strength, and even greater relative to the bending strength. If an attempt is made to fold the fabric into an acute angle, the bending strength becomes non-negligible;
an image representing the dummy selected by the operator may be displayed on the screen. As described above, the operator also selects pieces of clothing to be placed on the surface of the dummy, regardless of their physical characteristics. Intermediate displays may also be made on the device of the garment pressed against the dummy and thus in its compressed state, before slackening. Then, an operation of joining these components together is performed, followed by a relaxation step.
The operator may then view the garment, analyze the construction or the overall impression, and if the operator is dissatisfied with something, may select a new piece of the garment to replace the previous piece, or may modify the piece of the garment.
After passing the simulated authentication member, the garment can also be physically manufactured, for example by an operation of cutting pieces of fabric.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A method of simulating and displaying a dummy model garment, comprising:
s100, data stored in a memory of a computer are passed;
s200, a computer of a dummy model with a representation of the seam line, with a surface represented by data stored in a memory;
s300, placing the clothing piece on the surface of the model;
s400, connecting the garment pieces together along the seam lines of the garment pieces;
s500, each garment piece is loosened from its position on the surface of the dummy model to its equilibrium position on the dummy model.
2. The method of simulating and displaying dummy model clothing of claim 1, wherein: -establishing a bijective and continuous relationship between at least a portion of the piece of clothing and a corresponding portion of the surface of the virtual model, -placing the piece of clothing on the surface of the virtual model by establishing a bijective and continuous relationship between points representing the piece of clothing and points on the corresponding portion of the surface of the virtual model.
3. The method of simulating and displaying dummy model clothing of claim 1, wherein: triangulation of the garment piece; and the triangle of the part is deformed to conform to the projection.
4. A method of simulating and displaying dummy model clothing in accordance with claim 1, wherein: the triangulation of the component is deformed by: displacing a point defining a contour of the component to a point on a contour of the projection; and moves the point that is the vertex of the triangle within the pawn's outline.
5. The method of simulating and displaying dummy model clothing of claim 1, wherein: the triangulation deforms while satisfying the constraints whereby the triangulated triangle of the part is not flipped.
6. The method of simulating and displaying dummy model clothing of claim 1, wherein: subdividing the garment panel into a first set of portions; and deforming the set of portions while minimizing an energy function of the garment piece, subdividing the garment piece into a second set of portions smaller than the portions of the first set; and deforming the second set of portions while minimizing an energy function of the garment.
7. The method of simulating and displaying dummy model clothing of claim 1, wherein: the energy function represents the traction energy of the garment panel, which is calculated in two dimensions with respect to the position of the panel and is a function of the value of the stiffness K of the fabric.
8. The method of simulating and displaying dummy model clothing of claim 1, wherein: said pre-storing of data corresponding to said field lines, said parts of said first and second set of parts being connection areas of said garment piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110474856.2A CN113240818A (en) | 2021-04-29 | 2021-04-29 | Method for simulating and displaying dummy model clothes |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110474856.2A CN113240818A (en) | 2021-04-29 | 2021-04-29 | Method for simulating and displaying dummy model clothes |
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| CN113240818A true CN113240818A (en) | 2021-08-10 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040049309A1 (en) * | 2001-01-19 | 2004-03-11 | Gardner James Holden Patrick | Production and visualisation of garments |
| US6968297B1 (en) * | 1999-10-08 | 2005-11-22 | Lectra Sa | Method and device for simulating and representing the dressing of a mannequin |
| CN103946732A (en) * | 2011-09-26 | 2014-07-23 | 微软公司 | Video display modification based on sensor input for a see-through near-to-eye display |
| US9868302B1 (en) * | 2016-06-20 | 2018-01-16 | Amazon Technologies, Inc. | Fluorescent ink printing, cutting, and apparel assembly |
| WO2019221820A1 (en) * | 2018-05-17 | 2019-11-21 | Ifgcure Holdings, Llc | Postural recovery garment device systems and methods for manufacture of same |
| US20200250884A1 (en) * | 2019-01-31 | 2020-08-06 | Loud & Clear Products, LLC | Method for creating a curved covering from flat material |
-
2021
- 2021-04-29 CN CN202110474856.2A patent/CN113240818A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6968297B1 (en) * | 1999-10-08 | 2005-11-22 | Lectra Sa | Method and device for simulating and representing the dressing of a mannequin |
| US20040049309A1 (en) * | 2001-01-19 | 2004-03-11 | Gardner James Holden Patrick | Production and visualisation of garments |
| CN103946732A (en) * | 2011-09-26 | 2014-07-23 | 微软公司 | Video display modification based on sensor input for a see-through near-to-eye display |
| US9868302B1 (en) * | 2016-06-20 | 2018-01-16 | Amazon Technologies, Inc. | Fluorescent ink printing, cutting, and apparel assembly |
| WO2019221820A1 (en) * | 2018-05-17 | 2019-11-21 | Ifgcure Holdings, Llc | Postural recovery garment device systems and methods for manufacture of same |
| US20200250884A1 (en) * | 2019-01-31 | 2020-08-06 | Loud & Clear Products, LLC | Method for creating a curved covering from flat material |
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