CN110795829A - Virtual human rapid modeling method for ship virtual reality field - Google Patents
Virtual human rapid modeling method for ship virtual reality field Download PDFInfo
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Abstract
The invention discloses a virtual human rapid modeling method for the field of ship virtual reality, which comprises the following steps: 1) determining a required module according to the modeling requirement of the customized virtual human; 2) judging whether each module in the model database meets the modeling requirement or not; 3) determining modules needed by modeling of virtual people which are lacked in a model library, and judging whether modules with reference values exist or not; 4) carrying out parameter modification modeling on a module with a reference value; 5) carrying out model reconstruction on modules which are missing and have no reference value; 6) carrying out rapid combined modeling on modules meeting customization requirements to generate a virtual person model; 7) and carrying out global welding and sewing treatment on the virtual human model to complete model establishment. The invention adopts a virtual human modeling mode combining modular modeling, parametric modeling and personality characteristic modeling, liberates technical personnel from the wiring modeling work of a bottom model, shortens the modeling period and reduces the modeling workload and cost.
Description
Technical Field
The invention relates to a virtual reality technology, in particular to a virtual human rapid modeling method for the field of ship virtual reality.
Background
With the continuous enhancement of the application depth and the application breadth of the virtual reality technology in the ship field, the ship engineering field puts a great deal of demands on the advanced customization and personalized design of virtual people with different roles. The ship field has the characteristics of high customization degree of virtual people, good uniform of uniform, large population and various sizes of human bodies.
The conventional virtual human modeling method comprises the following steps: modeling from the bottom layer up is done in three-dimensional software (e.g., 3ds max) according to customization requirements. The modeling period is long, the workload is large, the modeling cost is high, and the requirement on software operation skills of technicians is extremely high.
Therefore, scholars at home and abroad research various virtual human rapid modeling methods, which mainly comprise human three-dimensional scanning modeling, image-based virtual human modeling and parameterized human modeling. However, the method still has obvious defects in the aspects of application feasibility and application range, and is specifically represented as follows:
(1) the human body three-dimensional scanning modeling relates to the problems that scanning equipment is high in price, scanned data is low in identifiability, and the data analysis processing technology is difficult, so that the human body three-dimensional scanning modeling is not suitable for large-scale application and popularization.
(2) The image-based virtual human construction method has high requirements on the image and the professional level of technicians, and is not suitable for common modeling personnel to operate and apply.
(3) The existing human body parametric modeling can realize virtual human modeling with different size parameters, but only variable parameter modeling can be carried out on the basis of a given human body model, and obviously, the requirements of multiple application scenes on personalized modeling in aspects of virtual human roles, clothes, model textures and the like cannot be met.
Disclosure of Invention
The invention aims to solve the technical problem of providing a virtual human rapid modeling method for the field of ship virtual reality, aiming at the defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a virtual human rapid modeling method for the field of ship virtual reality comprises the following steps:
1) determining modules required by virtual human modeling according to the modeling requirements of the customized virtual human;
2) traversing the model database, and judging whether each module in the model database meets the modeling requirement of the module required by the virtual human modeling; if yes, turning to step 6); if not, turning to the step 3);
3) determining modules which are needed by virtual human modeling and are lacked in a model library, traversing the modules which do not meet modeling requirements in the model library, selecting modules with reference values according to the similarity (setting a similarity threshold), and adjusting parameters of geometric shape forms, skin color textures and clothing textures of the selected model modules; if a required model is formed, turning to the step 4); if not, turning to the step 5);
4) if a module which does not meet the requirement but has a reference value exists in the model library, performing parameter modification modeling on the module according to the modeling requirement of the virtual human, wherein the parameter modification modeling comprises the following steps: size and appearance, judging whether the modules of the modified model can completely meet the customization requirements; if yes, turning to step 6); if not, importing the modified module into 3ds max general software through an intermediate format, and performing individual characteristic modeling to obtain a module meeting customization requirements;
5) importing modules which are missing in the model base and have reference values into 3ds max general software from the model base through an intermediate format, and carrying out model reconstruction on the missing modules without the reference values to obtain modules meeting customization requirements;
6) rapidly combining and modeling all modules meeting the customization requirements to generate a required virtual person model, and importing the virtual person model into 3ds max general modeling software through an intermediate format file;
7) and carrying out global welding and stitching treatment on the generated virtual human model to complete the establishment of the virtual human model.
According to the scheme, the modeling requirements of the customized virtual human are analyzed in the step 1), module objects in the analysis process are consistent with the division of a model base module, and the modeling requirements of the body part and the clothing part of the virtual human in the aspects of size and appearance are determined, wherein the body part comprises a head module, a trunk module, an upper limb module, a lower limb module and other modules (such as beards); the clothing part comprises a hat module, a coat module, a trousers module, a shoes module and other modules (such as glasses and earrings).
According to the scheme, the model database in the step 2) comprises all the component modules of a body part and a clothing part; wherein the body part comprises a head module, a body module, an upper limb module, a lower limb module and other modules (such as beard); the clothing part comprises a hat module, a coat module, a trousers module, a shoes module and other modules (such as glasses and earrings).
According to the scheme, the rapid model combination process in the step 6) is completed on the basis of realizing the standardized definition of the interfaces among the modules in the model database by adopting a modeling tool.
According to the scheme, the parameter modification modeling process in the step 4) is completed on the basis that the adopted modeling tool realizes the encapsulation of the parameter modeling function of each module.
According to the scheme, the personality modeling in the step 4) is executed in the general modeling software 3ds max, and the model geometry modification and the model texture mapping modification are included.
According to the scheme, the model reconstruction in the step 5) is executed in the universal modeling software 3ds max, and the method comprises the steps of wiring geometric modeling of the missing part model, model UV unfolding and UV mapping drawing.
According to the scheme, the data is imported into the 3ds max general modeling software process through the intermediate format file, and is executed among different modeling software through a shared obj intermediate format data interface.
According to the scheme, the welding and sewing of the model in the step 7) are executed in the general modeling software 3ds max, and the operation comprises the deletion of the inter-module intersection points and the integrated welding operation of the module transition points.
The invention has the following beneficial effects:
(1) the modeling tool adopted by the method constructs a model database with rich modularization, is matched with a parameterized modeling function for encapsulating each module, and is combined with an individualized characteristic modeling mode, so that the customized modeling requirements of virtual people in each engineering field can be met, and the method has good universal applicability.
(2) The method breaks through the conventional bottom-up modeling mode, and releases technicians from the complicated bottom model wiring modeling work by adopting a virtual human modeling mode combining modular modeling, parametric modeling and personality characteristic modeling, thereby shortening the modeling period and reducing the modeling workload and cost.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a flow chart of a method of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a module hierarchy partitioning of a model database according to an embodiment of the present invention;
fig. 3 is a diagram and a wire frame diagram for realizing the effect of a 07-style navy military uniform cloth cap soldier in an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in FIG. 1, the invention provides a virtual human rapid modeling method for the field of ship virtual reality, which has universality and high efficiency and can meet the customization requirements of virtual humans in the field of ships.
The 3dsmax has an intermediate conversion format, the traditional intermediate format is constructed and formulated based on data conversion standards (such as stp, iges and the like), and the consistency with the mixamo fuse used by the later-stage virtual human processing is better.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the modeling method comprises the steps of analyzing customization requirements of a virtual human model by using two types of software, namely MixamoFuse modular modeling software and 3ds max universal modeling software, as basic modeling tools, and performing condition-based modeling according to the satisfaction degree of a model base on the modeling requirements.
The method mainly comprises the following modeling application processes:
A. analyzing the modeling requirement of the customized virtual human, traversing the model database, and judging whether all modules in the model database meet the modeling requirement. If yes, executing step B; if not, executing step C.
And step A is executed on the basis that the software completes the construction of a model database, wherein the model database in the step A comprises a body part and a clothing part. The body part comprises a head module, a trunk module, an upper limb module, a lower limb module and other modules (such as beards), and the clothing part comprises a hat module, a coat module, a trousers module, a shoes module and other modules (such as glasses and earrings).
Step a, analyzing modeling requirements of the customized virtual human, wherein an analysis object in the analysis process is consistent with model base module division, and fig. 2 is a module hierarchical structure division mode of the model database, and the modeling requirements of the virtual human body part (head, trunk, upper limbs, lower limbs and the like) and the clothing part (coat, trousers, shoes, hat and the like) in the aspects of size and appearance are determined.
B. And carrying out rapid combined modeling on the modules meeting the customization requirements in the model library to generate the required virtual person model, and importing the virtual person model into 3ds max general modeling software through an intermediate format file.
And B, performing the rapid model combination process on the basis of realizing the interface standardization definition among the modules in the model database by adopting a modeling tool.
C. And comparing the modules which do not meet the customization requirements in the model library, and judging whether the modules have reference values in the aspects of shape or appearance. If yes, executing step D; if not, executing step E.
D. And carrying out modification modeling on the size and appearance parameters of the modules which do not meet the requirements but have reference values in the model library. And judging whether all the modules of the modified model can completely meet the customization requirements. If yes, executing step B; if not, executing step F.
And D, modifying and modeling the size and appearance parameters, and finishing the modification and modeling process on the basis of realizing the encapsulation of the parameterized modeling function of each module by adopting a modeling tool.
E. And importing the modules meeting the requirements into 3ds max general software through an intermediate format, and performing model reconstruction on the modules which are missing and have no reference value. And E, performing model reconstruction of the missing module in the step E in the general modeling software 3ds max, wherein the model reconstruction comprises elements such as wiring geometric modeling, model UV unfolding and UV mapping drawing of the missing part model.
F. And importing all the constructed modules into 3ds max general software through an intermediate format, and performing modified modeling on part of models which do not meet requirements but have reference values.
The modification with reference value model described in step F is performed in the general modeling software 3ds max, including model geometry modification or model texture map modification.
And F, modifying the model with the reference value in the step F on the basis of realizing the UV expansion of the model when only modifying the texture mapping of the model is carried out, wherein the derived model finishes the UV expansion work and does not need repeated operation.
G. And performing global welding and sewing on the model to complete the establishment of the virtual human model, wherein the finally generated virtual human model is a 3ds max file. Model welding and sewing in the step G are executed in the general modeling software 3ds max, and the model welding and sewing method mainly comprises the integrated welding operation of deleting intersection points among modules and integrally welding transition points among the modules.
In the above step, the process of importing to the 3ds max universal modeling software through the intermediate format file in step B, E, F is executed on the basis that a common obj intermediate format data interface exists between different modeling software. B. E, F, importing the intermediate format file into the 3d max general modeling software operation process, and managing the same path for the map file and the model file.
The method takes a virtual human model of a Chinese navy soldier with a customized 07-type cloth hat as an embodiment.
The embodiment of the invention relates to a virtual human rapid modeling method for the field of ship virtual reality, which mainly comprises the following modeling processes:
s1: referring to a module hierarchical structure division mode of a model database in fig. 2 and fig. 3, modeling requirement analysis is performed on the customized 07-style cloth cap chinese navy soldier virtual human, and modeling requirements on the size and appearance of a virtual human body part (head, trunk, upper limbs, lower limbs, and the like) and a clothing part (jacket, trousers, shoes, hats, and the like) are determined.
S2: and traversing the model database by combining the modeling requirements of the customized virtual human, and judging whether all the modules in the model database meet the modeling requirements. The condition that the modeling requirements of the model database and each module of the customized 07-type cloth cap Chinese navy soldier meet is shown in table 1.
Table 1 model database each module and navy model customization requirement conformity situation table
S3-2: and judging whether the modules which do not meet the customization requirements in the model library have reference values in the aspects of shape or appearance.
According to table 1, the head module shape does not meet the requirements but has a reference value; the shapes of the coat module, the trousers module and the shoes module meet the requirements, and the textures do not meet the requirements; the hat part is not satisfactory and of no reference value. And carrying out classification operation according to the analysis result.
The main modeling operation contents of S3-2-1 are as follows:
and carrying out size parameter modification modeling on the head module, and carrying out texture parameter modification modeling on the coat module, the trousers module and the shoe module.
And judging the modified model, wherein the jacket model cannot meet the requirements in the aspects of chest badge and armband.
Importing the models which are constructed in each step and meet the requirements into virtual reality general modeling software 3ds max through an obj intermediate format file, and carrying out UV mapping reconstruction on the coat model.
S3-2-2: and (3) performing model reconstruction on the missing military cap module in a general modeling software 3ds max by taking the derived model meeting the requirements as a size reference, wherein the model reconstruction comprises the elements of wiring geometric modeling of the military cap model, model UV expansion and UV mapping drawing.
S4: in the general modeling software 3dsmax, welding and sewing operations are carried out on each module model meeting the requirements, and the operations mainly comprise deleting of intersection points among modules and integral welding of module transition points.
And finishing modeling of the virtual human, wherein the finally generated virtual human model is a 3ds max file.
In conclusion, in the method application modeling process, the modular modeling, the parametric modeling and the individual characteristic modeling are combined, a large amount of bottom layer wiring modeling work is avoided, the rapid construction of the 07-type cloth cap Chinese navy soldier virtual human model is realized through embodiment operation, and the universality and the high efficiency of the method in the virtual human application modeling process are shown.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (9)
1. A virtual human rapid modeling method for the field of ship virtual reality is characterized by comprising the following steps:
1) determining modules required by virtual human modeling according to the modeling requirements of the customized virtual human;
2) traversing the model database, and judging whether each module in the model database meets the modeling requirement of the module required by the virtual human modeling; if yes, turning to step 6); if not, turning to the step 3);
3) determining modules which are needed by virtual human modeling and are lacked in a model library, traversing the modules which do not meet modeling requirements in the model library, selecting and sequencing the modules with reference values according to the similarity of the modules, and adjusting parameters of geometric shape forms, skin color textures and clothing textures of the selected model modules; if a required model is formed, turning to the step 4); if not, turning to the step 5);
4) carrying out parameter modification modeling on modules which do not meet the requirements but have reference values in a model library according to the modeling requirements of the virtual human, wherein the parameter modification modeling comprises the following steps: size, appearance; judging whether the modules of the modified model can completely meet the customization requirements or not; if yes, turning to step 6); if not, importing the modified module into 3dsmax general software through an intermediate format, and performing individual characteristic modeling to obtain a module meeting customization requirements;
5) importing modules which are missing in the model base and have reference values into 3ds max general software from the model base through an intermediate format, and carrying out model reconstruction on the missing modules without the reference values to obtain modules meeting customization requirements;
6) rapidly combining and modeling all modules meeting the customization requirements to generate a virtual person model, and importing the virtual person model into 3ds max universal modeling software through an intermediate format file;
7) and carrying out global welding and stitching treatment on the generated virtual human model to complete the establishment of the virtual human model.
2. A virtual human rapid modeling method oriented to the field of ship virtual reality according to claim 1, wherein modeling requirements of the customized virtual human are analyzed in step 1), module objects in the analysis process are consistent with the division of a model base module, and the modeling requirements of a virtual human body part and a clothing part in the aspects of size and appearance are determined, wherein the body part comprises a head module, a trunk module, an upper limb module and a lower limb module; the clothes part comprises a hat module, a coat module, a trousers module and a shoe module.
3. A virtual human rapid modeling method oriented to the field of ship virtual reality according to claim 1, wherein the model database in the step 2) comprises each component module of a body part and a clothing part; the body part comprises a head module, a trunk module, an upper limb module and a lower limb module; the clothes part comprises a hat module, a coat module, a trousers module and a shoe module.
4. A virtual human rapid modeling method oriented to the field of ship virtual reality according to claim 1, wherein the rapid model combination process in step 6) is completed on the basis of the standardized definition of interfaces among modules in a model database realized by a modeling tool.
5. A virtual human rapid modeling method oriented to the field of ship virtual reality according to claim 1, wherein the parameter modification modeling process in the step 4) is completed on the basis of encapsulation of the parameterization modeling function of each module by an adopted modeling tool.
6. A virtual human rapid modeling method oriented to the ship virtual reality field according to claim 1, wherein the personality modeling in the step 4) is executed in a general modeling software 3ds max, and comprises model geometric shape modification and model texture mapping modification.
7. A virtual human quick modeling method oriented to the ship virtual reality field according to claim 1, wherein model reconstruction in the step 5) is performed in general modeling software 3ds max, and the method comprises wiring geometric modeling of a missing part model, model UV unfolding and UV mapping drawing.
8. A virtual human rapid modeling method oriented to the ship virtual reality field according to claim 1, wherein the import to the 3ds max general modeling software process through the intermediate format file is executed between different modeling software through a common.obj intermediate format data interface.
9. A virtual human rapid modeling method oriented to the ship virtual reality field according to claim 1, wherein the model welding and stitching in the step 7) are executed in a general modeling software 3ds max, and the model welding and stitching include an inter-module intersection point deletion and a module transition point integrated welding operation.
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| CN113591212A (en) * | 2021-07-14 | 2021-11-02 | 中国舰船研究设计中心 | Ship equipment arrangement method based on packaging unit and information association |
| CN114851565A (en) * | 2022-04-12 | 2022-08-05 | 深圳市广德教育科技股份有限公司 | Method for manufacturing fitting model by using 3D printing technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111619755A (en) * | 2020-06-09 | 2020-09-04 | 中国船舶科学研究中心 | Hull profile design method based on convolutional neural network |
| CN111619755B (en) * | 2020-06-09 | 2021-05-04 | 中国船舶科学研究中心 | Hull profile design method based on convolutional neural network |
| CN112230893A (en) * | 2020-10-16 | 2021-01-15 | 北京中船信息科技有限公司 | Ship manufacturing-oriented multi-industrial mechanism model one-stop construction system and method |
| CN113591212A (en) * | 2021-07-14 | 2021-11-02 | 中国舰船研究设计中心 | Ship equipment arrangement method based on packaging unit and information association |
| CN113591212B (en) * | 2021-07-14 | 2024-04-09 | 中国舰船研究设计中心 | Ship equipment arrangement method based on packaging unit and information association |
| CN114851565A (en) * | 2022-04-12 | 2022-08-05 | 深圳市广德教育科技股份有限公司 | Method for manufacturing fitting model by using 3D printing technology |
| CN114851565B (en) * | 2022-04-12 | 2024-03-29 | 深圳市广德教育科技股份有限公司 | Method for manufacturing fitting model by using 3D printing technology |
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