WO2008016027A1 - Device and its method for dressing simulation and program - Google Patents
Device and its method for dressing simulation and program Download PDFInfo
- Publication number
- WO2008016027A1 WO2008016027A1 PCT/JP2007/064937 JP2007064937W WO2008016027A1 WO 2008016027 A1 WO2008016027 A1 WO 2008016027A1 JP 2007064937 W JP2007064937 W JP 2007064937W WO 2008016027 A1 WO2008016027 A1 WO 2008016027A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polygons
- polygon
- clothing
- fine
- coarse
- Prior art date
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
- G06T17/20—Finite element generation, e.g. wire-frame surface description, tesselation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/12—Cloth
-
- 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
Definitions
- the present invention relates to a garment wearing simulation using a fabric, and more particularly to speeding up the simulation.
- Patent Document 1 discloses that a simulation is performed with a rough model with a small number of polygons, and the next model is changed to a detailed model with a large number of polygons! /.
- Patent Document 1 Japanese Patent Laid-Open No. 2005-11027
- the force acting on each polygon is calculated, the polygon is deformed only once, and further simulation is performed! / Wow! /
- the simulation results in the rough! / Model are basically maintained, and the simulation is completed within the range in which the original model in the rough model is maintained.
- Patent Document 1 Japanese Patent Laid-Open No. 2005-11027
- An object of the present invention is to make it possible to simulate the wearing state of clothing in a short time to an accuracy corresponding to a model using fine polygons.
- An additional problem with the present invention is the appropriate timing from coarse polygons to fine polygons. It is to switch in.
- the present invention divides clothing into a plurality of polygons, and deforms and moves the polygon based on the force acting on the polygons from the human body model, the force between polygons, and gravity, so that the clothing is attached to the human body.
- an apparatus for simulating a state In an apparatus for simulating a state,
- the present invention also divides clothing into a plurality of polygons, and the force acting on the polygons from the human body model.
- Coarse! / Polygonal simulation results as initial values, fine! /, Subdivide clothing with polygons, and at least deform and move the polygons until a dressing state corresponding to the division into fine polygons is obtained It is characterized by simulating the wearing state so that the above is repeated.
- the present invention further divides the clothing into a plurality of polygons, and deforms and moves the polygons based on the force acting on the polygons from the human body model, the force between the polygons, and the gravity, thereby moving the clothing on the human body.
- the command to divide the clothing with coarse polygons and simulate the wearing state and the simulation result with coarse! /, Polygon are the initial values, and fine! /, With polygon Instructions for simulating the wearing state are provided so that the clothing can be subdivided and at least the wearing state corresponding to the division into fine polygons is obtained, so that deformation and movement of the fine polygons are repeated.
- the clothing divided into coarse polygons is moving at a substantially constant speed, and at the time of detection, the coarse, polygon is changed to fine! /, Polygon is changed.
- the description regarding the simulation apparatus applies to the simulation method and the program as it is unless otherwise specified, and the description regarding the simulation method also applies to the simulation apparatus and the program unless otherwise specified.
- the human body model used in the simulation is not a real human body, but for simplicity, the human body model is sometimes called the human body!
- the first half of the simulation is performed with coarse polygons, and the second half is performed with fine polygons.
- the time required for the simulation is shortened, and the wearing result corresponding to the fine polygon can be simulated. This makes it easier to evaluate clothing designs.
- FIG. 1 is a block diagram of a wearing simulation apparatus according to an embodiment.
- FIG. 2 is a flowchart showing a wearing simulation method of the embodiment.
- FIG. 5 A diagram showing another example of coarse! /, Polygon and fine! /, Polygon in the embodiment
- FIG. 7 A diagram showing the relationship between a texture image, fine polygons and coarse polygons in the example.
- FIG. 8 Explains how the clothing divided into coarse! / Polygons moves at almost constant speed in the embodiment.
- FIG.9 Shows wearing simulation results in a comparative example, (A) is fine! /, Results using polygons (B) shows the results of using rough polygons, and shows the skirt polygonal division from the left in the figure, the skirt wearing state in front view, and the skirt wearing state in plan view.
- FIG. 10 Shows the result of wearing simulation in the example, and starts the simulation using the rough polygon in Fig. 9 (B), then changes to (A) fine! / Polygon and ends the simulation. Is.
- the left side of Fig. 10 shows the wearing state of the skirt in front view, and the right side shows the wearing state of the skirt in plan view.
- Pattern data storage unit 22 Polygon generation unit 24 Simulator
- FIG. 1 to FIG. 10 show a wearing simulation apparatus 2, a simulation method, and a simulation program 30 according to the embodiment.
- 4 is a bus
- 6 is a stylus
- 7 is a digitizer
- 8 is a keyboard used for command input
- 10 is a color monitor.
- the clothing is designed with the stylus 6, the design result is displayed on the color monitor 10, and the clothing is designed by correcting again with the stylus 6.
- 12 is a color printer
- 14 is a disk drive, and it can be used for input / output of design results.
- the LAN interface 16 can also be used for input / output of design results.
- Reference numeral 18 denotes a pattern creation unit which edits the design input from the stylus 6 and uses it as clothing pattern data.
- Each pattern of clothing is included in the pattern data.
- the ID of each part and the attribute of the part for example, data such as the front body, back body, collar, right front sleeve, and feature points representing the position of the part such as the armpit are added.
- the stitching line between parts is determined from the correspondence between the feature points.
- the garment that is the subject of this invention is a garment in which a plurality of parts are sewn, and in particular, a garment in which parts made of fabric are sewn.
- Reference numeral 20 denotes a pattern data storage unit which stores pattern data to be subjected to wearing simulation.
- a polygon generation unit 22 divides each part of the pattern data into a plurality of polygons, and in particular, two types of coarse polygons and fine polygons. Divide by polygon.
- Figures 4 and 5 show examples of division into polygons.
- the solid line is a mesh for dividing into rough polygons
- the broken line is a mesh for dividing into fine and high polygons.
- the dividing line to the coarse polygon also serves as the dividing line to the fine polygon, and the fine polygon is inside one coarse polygon.
- Fig. 5 one fine! /
- the dividing line to the polygon is not always fine, and the dividing line to the polygon
- the outline defining the outer shape of the garment and the inner line of the fold or pocket boundary are particularly important points in the design.
- the part boundaries themselves are not clothing outlines. Therefore, only fine polygons and polygons are assigned to the positions that touch the contour lines and internal lines from the beginning, and even when simulating with coarse! / Polygon, the polygons that touch the contour lines and internal lines are fine! /, And polygons. It is preferable to do.
- FIG. 1 24 is a simulator, which obtains the force acting on each polygon, deforms and moves the polygon, and executes a simulation.
- Figure 6 shows the model of the force acting on the polygon.
- gl to g4 are the center of each polygon, and the shape of the polygon may be a triangle or a rectangle.
- L1 to L3 are the three sides of the center polygon, ⁇ is Zg2glg3, and ⁇ is the bending angle when two polygons are bent with side L1 as the boundary.
- the force acting on the central polygon depends on the positional relationship between the centers g2, g3, and g4 of three adjacent polygons, and how the sides L1 to L3 have changed from the pattern data stage. Depending on the bending angle ⁇ between the polygons adjacent to the sides L1 to L3, and depending on how Zg2g lg3 and the like have changed from the pattern data stage. These forces are based on how the polygon is deformed with respect to the pattern data. These forces can be regarded as a panel force proportional to the displacement of the polygon shape at the pattern data stage, which is a stable shape.
- Polygon acceleration corresponds to the translation and rotation of the center and the movement of each side or vertex relative to the center of gravity. Note that the movement of the sides and vertices of the polygon is limited to the polygon plane.
- FIG. 7 shows the correspondence between clothing texture and fine or coarse polygons.
- 71 is a texture image of clothing
- 72 is a fine polygon arrangement
- 73 is a coarse polygon arrangement.
- a rough polygon is used to simulate the wearing state, and a rough polygon arrangement 74 in 3D space is obtained.
- Arrangements 73 and 74 show the arrangement of polygons P1P2P3. Since the position of polygon P1P2P3 is known at arrangement 74, the force at which each point on polygon P1P2P3 at arrangement 73 is mapped to which position in 3D space can be obtained.
- any point other than the polygon P1P2P3 in the arrangement 73 can be obtained as a coordinate when mapped to the arrangement 74 in the 3D space. Therefore, it is possible to determine the fineness at arrangement 72,!, Where the polygon is mapped in 3D space, and also determine the position at which each pixel of texture image 71 is mapped in 3D space. Can do. For example, projective change is used for mapping.
- FIG. 8 shows a change in the sum of absolute values of acceleration acting on the clothing during the simulation process.
- each Solve the polygon equation of motion and find its acceleration.
- the number of times the equation of motion is solved is the number of simulations N
- the sum of the absolute values of acceleration to each polygon is the total acceleration A. If the total acceleration A is large, the clothing is in an unstable state, and if the total acceleration A is 0, the clothing is in a stable state. When the simulation is repeated, the minimum value appears in the total acceleration A and then increases again. If the average of the absolute values of the polygon velocities is taken as the average velocity, the garment will move approximately at a constant speed n, where the total acceleration A is the minimum value, and the average velocity will be constant near this point.
- the number of simulations is n, in other words, the total acceleration A is minimized, and the coarse polygon is changed to the fine polygon in the vicinity of the point where the clothing moves at a substantially constant speed. After the clothing has reached the stable state with a rough polygon by the above procedure, it is replaced with a fine polygon, and a fine texture V that cannot be expressed with a rough polygon is simulated.
- 26 is a polygon switching unit, which monitors the change in the total acceleration of the clothing during the simulation process using coarse polygons, and when the total acceleration passes the minimum value, the total acceleration becomes the minimum value. Coarse to the position! /, Return the polygon position and posture, and change the polygon to a low-power polygon. Since the point where the total acceleration is minimized is overtaken and then restored, it is preferable to store the polygon position and orientation for the past two or three steps, for example.
- the coarse! / Polygon position is the one with the minimum total acceleration, and the initial placement of the fine polygons using the relationship shown in Fig. 7 Decide.
- the speed of the coarse polygon may be transferred to the fine polygon, but the initial speed of the fine polygon is set to 0 in the embodiment.
- the equations of motion are solved by solving the equations of motion based on the positional relationship between the polygons, the interference with the human body model, the gravity acting on the clothing, and the frictional force associated with the movement of the polygons. Repeat deformation and movement to recalculate.
- the simulator 24 executes the simulation again based on the initial arrangement of fine polygons and the initial force.
- a calculation time of about 1: 1 is used for a simulation with a coarse polygon and a simulation with a fine polygon, for example.
- the overall calculation time is low and the clothes using large polygons are in a stable state. It takes about half of the time required to perform simulation with fine polygons from the beginning, and is twice the time required for simulation using only coarse polygons.
- FIG. 2 shows a wearing simulation method of the embodiment.
- Each part of the pattern data is divided into coarse polygons and fine polygons.
- each part is virtually stitched according to the pattern data, and virtually worn on the human body model.
- Simulation is performed on clothing divided into rough polygons until it reaches a stable state.
- the wearing simulation is executed until the clothing shifts to a stable state, in other words, until the total acceleration becomes a predetermined value or less, or until a simulation is performed a predetermined number of times or more.
- FIG. 3 shows the simulation program 30 of the embodiment.
- the polygon generation command 31 divides each part of clothing by rough V, polygon and fine, and polygon, and the stitching command 32 follows the pattern data. Each part is virtually stitched, and the wearing instruction 33 virtually puts the stitched clothes on the human body model.
- simulation command 34 the force acting on each polygon is obtained, the equation of motion of the polygon is solved, and the polygon is deformed and moved.
- Polygon switching command 35 detects that the total acceleration acting on the clothing has been minimized, changes the polygon to coarse, polygon to fine, and polygon, and determines the coarse! / Delivers the force and the polygon arrangement to the simulation command 34 as the initial value of the fine polygon arrangement.
- Fig. 9 and Fig. 10 show the skirt wearing simulation results
- Fig. 9 (A) shows the results of simulation using only fine polygons from the beginning
- (B) shows simulation using only coarse polygons.
- the result is shown.
- the left column in Fig. 9 represents the skirt on the pattern data
- the middle column shows the simulation result in front view
- the right column shows the simulation result in plan view. Coarse! /, Even if the simulation is repeated until a stable state is reached using polygons, the simulation results with fine polygons are different.
- the shape of the skirt folds is different and the draping feel Cannot be expressed.
- Figure 10 shows the results when the simulation was started with coarse polygons and the simulation was continued after changing to fine polygons according to the example.
- the simulation results for both front and plan views are almost the same as those simulated using fine polygons from the beginning.
- the type of force clothing indicating the wearing of the skirt is arbitrary.
- the human body model may be set in the virtually sewn clothing and the clothing may be expanded to the outline of the human body model.
- the human body model can be expressed by a thin axis, and the axis of the human body model is passed through the virtually sewn clothing and the axis is expanded to the human body model.
- the clothing can be deformed so as not to interfere with the human body model. Good.
- a rough simulation is performed, so clothing is divided into rough polygons.
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Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007800290290A CN101501731B (zh) | 2006-08-03 | 2007-07-31 | 穿戴模拟装置及其方法 |
JP2008527749A JP5010603B2 (ja) | 2006-08-03 | 2007-07-31 | 着装シミュレーション装置とその方法及びプログラム |
EP07791622.9A EP2048622A4 (en) | 2006-08-03 | 2007-07-31 | DEVICE AND METHOD FOR SIMULATION OF APPAREL AND PROGRAM |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-211726 | 2006-08-03 | ||
JP2006211726 | 2006-08-03 |
Publications (1)
Publication Number | Publication Date |
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WO2008016027A1 true WO2008016027A1 (en) | 2008-02-07 |
Family
ID=38997203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/064937 WO2008016027A1 (en) | 2006-08-03 | 2007-07-31 | Device and its method for dressing simulation and program |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2048622A4 (ja) |
JP (1) | JP5010603B2 (ja) |
CN (1) | CN101501731B (ja) |
WO (1) | WO2008016027A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010061431A (ja) * | 2008-09-04 | 2010-03-18 | National Institute Of Advanced Industrial Science & Technology | 衣類状態推定方法及びプログラム |
WO2010116876A1 (ja) * | 2009-04-08 | 2010-10-14 | 株式会社島精機製作所 | 着装シミュレーション装置とシミュレーション方法及びシミュレーションプログラム |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105455219B (zh) * | 2014-09-09 | 2018-02-27 | 联想(北京)有限公司 | 一种穿戴设备及数据处理方法 |
CN106343984A (zh) * | 2015-07-17 | 2017-01-25 | 松下知识产权经营株式会社 | 注意信息提示装置和注意信息提示方法 |
US20240169672A1 (en) * | 2022-11-17 | 2024-05-23 | Adobe Inc. | Modeling interfaces with progressive cloth simulation |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10124538A (ja) * | 1996-10-25 | 1998-05-15 | Toray Ind Inc | 組立構造体の組立状態解析方法、組立構造体の製造方法および組立構造体の製造支援装置 |
JPH10134095A (ja) * | 1996-10-28 | 1998-05-22 | Toray Ind Inc | 組立構造体の組立状態解析方法、衣服の着用状態解析方法ならびに衣服の製造方法および製造支援装置 |
-
2007
- 2007-07-31 CN CN2007800290290A patent/CN101501731B/zh not_active Expired - Fee Related
- 2007-07-31 WO PCT/JP2007/064937 patent/WO2008016027A1/ja active Application Filing
- 2007-07-31 JP JP2008527749A patent/JP5010603B2/ja not_active Expired - Fee Related
- 2007-07-31 EP EP07791622.9A patent/EP2048622A4/en not_active Ceased
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10124538A (ja) * | 1996-10-25 | 1998-05-15 | Toray Ind Inc | 組立構造体の組立状態解析方法、組立構造体の製造方法および組立構造体の製造支援装置 |
JPH10134095A (ja) * | 1996-10-28 | 1998-05-22 | Toray Ind Inc | 組立構造体の組立状態解析方法、衣服の着用状態解析方法ならびに衣服の製造方法および製造支援装置 |
Non-Patent Citations (1)
Title |
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See also references of EP2048622A4 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010061431A (ja) * | 2008-09-04 | 2010-03-18 | National Institute Of Advanced Industrial Science & Technology | 衣類状態推定方法及びプログラム |
WO2010116876A1 (ja) * | 2009-04-08 | 2010-10-14 | 株式会社島精機製作所 | 着装シミュレーション装置とシミュレーション方法及びシミュレーションプログラム |
CN102365658A (zh) * | 2009-04-08 | 2012-02-29 | 株式会社岛精机制作所 | 着装模拟装置和模拟方法及模拟程序 |
JP5543962B2 (ja) * | 2009-04-08 | 2014-07-09 | 株式会社島精機製作所 | 着装シミュレーション装置及びシミュレーションプログラム |
Also Published As
Publication number | Publication date |
---|---|
CN101501731A (zh) | 2009-08-05 |
JPWO2008016027A1 (ja) | 2009-12-24 |
EP2048622A1 (en) | 2009-04-15 |
CN101501731B (zh) | 2011-12-21 |
EP2048622A4 (en) | 2014-08-27 |
JP5010603B2 (ja) | 2012-08-29 |
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