CN105005642A - Three-dimensional model batch format conversion and weight reduction method - Google Patents
Three-dimensional model batch format conversion and weight reduction method Download PDFInfo
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Abstract
The invention provides a three-dimensional model batch format conversion and weight reduction method, and belongs to the field of computer simulation. The method has the following flow processes of: performing batch conversion for converting the format of three-dimensional entity model files into the stp format by CATIA (Computer-graphics Aided Three-dimensional Interactive Application) software; using a program 3DVIA Sync in the 3DVIA Composer to perform batch format conversion and weight reduction processing on the obtained stp format models to obtain 3ds format models; and using the Unity 3D tool for importing the three-dimensional entity models subjected to weight reduction. The method has the advantages that indexes such as the model conversion effect, whether the batch processing can be achieved or not and the input/output format are comprehensively considered; proper processing software and a reasonable format conversion and weight reduction processing mode are used; and on the premise of ensuring the model display effect, the file size, the model conversion time and the cost are effectively reduced.
Description
Technical field
The present invention is the conversion of a kind of three-dimensional model batch format and light weight method, is specifically related to the processes such as the derivation of model, model format conversion and model import again, belongs to Computer Simulation field.
Background technology
At present in Computer Simulation field, a vital job carries out format conversion and light-weight technologg to the three-dimensional model in correlation computer Autocad, by reasonable, practical, efficient processing mode, realize the cross-platform operation of the multimedia objects such as three-dimensional model, and then the mobile platform increasingly extensive with application combines.This wherein, the quality of three-dimensional model format conversion and light-weight technologg mode just seems especially important, because three-dimensional model contains a lot of parameter information, its file size is usually very large, just for the model cross-platform interchange equipment in later stage proposes very high requirement, make the efficiency of model treatment reduce simultaneously.
High-quality format conversion and light-weight technologg mode both can support satisfactory input, output format, can carry out again the batch processing of data, must take into account the display effect after model conversion and light weight degree in addition.Along with the development of correlation technique, in Computer Simulation field, model to be dealt with is bound to more complicated various, and this just requires that three-dimensional model format conversion and lightweight mode have more optimal effect.
Summary of the invention
The invention provides a kind of three-dimensional model format conversion and light weight method, under the prerequisite ensureing models show effect, effectively reduce file size, reduce the model conversion time, reduce costs.Through experimental test verification, the present invention selects to change and lightweight scheme based on the batch format of CATIA, 3DVIA Composer two kinds of softwares, thus reaches Efficient Conversion and the adjustable object of light weight degree.
Three-dimensional model format conversion of the present invention and light weight method, implementation step is as follows:
Step 1, uses script to call CATIA, carries out batch processing, save as stp form model to catproduct and catpart form model;
Step 1.1, compile script obtains the store path of the file of required format transformation;
Step 1, uses script to call CATIA, carries out batch processing, save as stp form model to catproduct and catpart form model;
Step 1.1, compile script obtains the store path of the file of required format transformation;
Step 1.1.1, open notepad, enroll code " dir/b/s*.catpart>file.txt " and be called the path of the file of catpart for obtaining suffix in current file folder, or enroll code " dir/b/s*.catproduct>file.txt " and be called the path of the file of catproduct for obtaining suffix in current file folder, the notepad enrolling code is preserved into bat formatted file;
Step 1.1.2, arranges the file of required format transformation, is placed in same file folder, the bat formatted file in step 1.1.1 is put into this file;
Step 1.1.3, double-clicks and runs bat file, generate the txt formatted file that comprises the path of all models that meets the demands;
Step 1.1.4, with the txt file generated in excel opening steps 1.1.3, adds blank the first row, fills in the sum of the model that meets the demands, preserve into xls form in the first row first row form;
Step 1.2, compile script calls CATIA, and the files in batch of required format transformation is converted to stp form;
Step 1.2.1, opens notepad, enrolls batch format transcode, writes complete, preserves into catvbs form;
Step 1.2.2, runs catvbs formatted file, and realize automatically opening CATIA and carry out format conversion one by one to model, the stp form model storage after conversion is in original folder.
Step 2, uses the program 3DVIA Sync in 3DVIA Composer to carry out format conversion and light-weight technologg to gained stp form model, obtains 3ds form model.
Step 3, importing in Unity3D by having processed the 3ds form model obtained, using Unity3D to do three-dimensional display to model.
Advantage of the present invention and good effect are: the inventive method consider modelling effect after the conversion of multiple process software, whether can the index such as batch processing and I/O call format, select most suitable process software, provide suitable format conversion and light-weight technologg mode, under the prerequisite ensureing models show effect, effective reduction file size, reduce the model conversion time, reduce cost.The present invention devises script and calls CATIA and carry out batch processing to catproduct and catpart form model, realizes the files in batch conversion treating format transformation, decreases the model conversion time.
Accompanying drawing explanation
Fig. 1 is three-dimensional model format conversion of the present invention and light-weighted overall flow schematic diagram;
Fig. 2 is CATIA batch processing modular concept flow process of the present invention.
Embodiment
The three-dimensional model batch format conversion proposed the present invention below in conjunction with accompanying drawing and light weight method are described in detail.It should be noted that the file path of this patent indication is the path not comprising Chinese.
First software used in the inventive method is described.CATIA is the product development flagship solution of French Da Suo company (Dassault).Work in coordination with an important component part of solution as PLM, it can help manufacturer to design the product in their future, and supports from item current stage, concrete design and analysis, simulates, is assembled into and is maintained in interior whole industrial design flow processs.The embodiment of the present invention is based on CATIA V5R19 version.3DVIA Composer is proposed a graphics software issued for 3D product documentation by French Da Suo company (Dassault), and 3DVIA Sync is its subsidiary program, and the embodiment of the present invention is based on 2013 simplified form of Chinese Character versions.Unity3D be developed by Unity Technologies company easily can create the multi-platform comprehensive instrument that such as 3 D video plays, builds the type interaction contents such as visual, realtime three dimensional animation.The embodiment of the present invention is based on the Unity3D of 4.6.3 version.
First the present invention considers four aspect factors: input/output format meets the demands; Model display effect after conversion; Light weight degree; Batch processing etc. can be carried out.3DVIA Composer is selected as fundamental operating software from common 5 kinds of format conversion and lightweight instrument Deep Exploration, NGRAIN, Inventor Publisher, GPure, 3DVIA Composer.
The present invention is the conversion of a kind of three-dimensional model batch format and light weight method, and flow process as shown in Figure 1, the following describes each step.
Step 1: use script to call CATIA, batch processing is carried out to catproduct and catpart form model, saves as stp form model.This step realization CATIA software carries out the Batch conversion of stp form to three-dimensional entity model file, main flow as shown in Figure 2.
Step 1.1, compile script obtains the store path of the file of required format transformation.
Step 1.1.1, opens notepad, enrolls code " dir/b/s*.catpart>file.txt ", and function obtains suffix in current file folder to be called the path of the file of catpart; Or enroll code " dir/b/s*.catproduct>file.txt ", function obtains suffix in current file folder to be called the path of the file of catproduct, inputs complete, preserve into bat formatted file.
Order dir is for the file in Display directory and sub-directory list, and/b represents use space formula, and/s represents the file in display assigned catalogue and all sub-directories.Catpart and catproduct represents file suffixes type.
Step 1.1.2, arranges the file of required format transformation, is placed in same file folder, bat formatted file in step 1.1.1 is put into this file.
Step 1.1.3, double-clicks and runs bat file, generate the txt formatted file that comprises the path of all models that meets the demands.
Step 1.1.4, with txt file in excel opening steps 1.1.3, adds blank the first row, fills in the sum of the model that meets the demands, preserve into xls form in its first row form;
Step 1.2, compile script calls CATIA, and the files in batch of format transformation required in step 1.1 is converted to stp form.
Step 1.2.1, opens notepad, writes batch format transcode, writes complete, preserves into catvbs form.The function that batch format transcode realizes is, the xls formatted file that read step 1.1.4 obtains, acquisition model sum, obtain the store path of the file of required format transformation successively, under utilizing CATIA software acquisition approach, corresponding movable assembly carries out format conversion, exports the assembly of stp form.
Following batch format transcode is enrolled in notepad:
After writing, notepad is preserved into catvbs formatted file.
Step 1.2.2, catvbs formatted file in operating procedure 1.2.1, namely automatically opens CATIA and carries out format conversion one by one to model, and the stp form model after conversion is stored in the file needed residing for format transformation file.
Step 2: use the program 3DVIA Sync in 3DVIA Composer to carry out batch format conversion and light-weight technologg to step 1 gained stp form model, obtain 3ds form model.
Step 2.1, opens 3DVIA Sync program.
Step 2.2, clicks the Section 1 " file " in the left side, interface menu bar, selects local institute to want light-weighted stp formatted file or comprise the file of stp formatted file, click " adding list to " button.As needed batch-processed files or file, repeat this step.
Step 2.3, clicks the Section 2 " issue " in the menu bar of the left side, interface, selects or inputs the file after converting and store path in " destination folder "." 3D studio Mesh (.3ds) " is selected in " CAD output format ".
Step 2.4, the Section 4 clicked in the menu bar of the left side, interface " is repaired/is refined ", selects light weight degree as required, has " relatively refining " and " definitely refining " two kinds of modes to select.
Step 2.5, click " conversion " button, program brings into operation, and namely end of run completes second step of the present invention.
Step 3: import the three-dimensional entity model after lightweight with Unity3D.
Run Unity3D software, in master menu, select " Asset/Import New Asset ", in the selective listing of ejecting, select the 3ds file that will carry out importing, click " Import " button, namely complete the conversion of three-dimensional model batch format and lightweight mode.
The input format that the present invention supports 3DVIA Composer and the output format that CATIA supports contrast, and choose total part, namely form the mode of three kinds of format conversion.Three kinds of schemes are respectively: (a) directly uses 3DVIA Composer to process catproduct/catpart form model; B () uses CATIA model to be saved as 3dxml form model, re-use 3DVIA Composer and process 3dxml form model; C () uses CATIA model to be saved as stp form model, re-use 3DVIA Composer and process stp form model.
For above-mentioned three kinds of schemes, the Flight Control System Model that before changing with, size is 248M is as an example, good and bad by test and comparison three.Test result show, needed for (a), (b), (c) three kinds of schemes, switching time is respectively: more than two hours, 9 points 32 seconds, 11 points 21 seconds; Size after model conversion is respectively: unknown, 79.4M, 26.4M; After the conversion of b, c scheme, model display effect is better; The adjustable light weight degree of a, c scheme.In sum, scheme c not only can regulate light weight degree, also shorter on switching time.The present invention calls CATIA by compile script and carries out batch processing Batch conversion to catproduct and catpart form model, decreases the model conversion time.
Claims (3)
1. three-dimensional model format conversion and a light weight method, is characterized in that, the performing step of the method is as follows:
Step 1: use script to call CATIA, batch processing is carried out to catproduct and catpart form model, saves as stp form model;
Step 1.1, compile script obtains the store path of the file of required format transformation;
Step 1.1.1, open notepad, enroll code " dir/b/s*.catpart>file.txt " and be called the path of the file of catpart for obtaining suffix in current file folder, or enroll code " dir/b/s*.catproduct>file.txt " and be called the path of the file of catproduct for obtaining suffix in current file folder, the notepad enrolling code is preserved into bat formatted file;
Step 1.1.2, arranges the file of required format transformation, is placed in same file folder, the bat formatted file in step 1.1.1 is put into this file;
Step 1.1.3, double-clicks and runs bat file, generate the txt formatted file that comprises the path of all models that meets the demands;
Step 1.1.4, with the txt file generated in excel opening steps 1.1.3, adds blank the first row, fills in the sum of the model that meets the demands, preserve into xls form in the first row first row form;
Step 1.2, compile script calls CATIA, and the files in batch of required format transformation is converted to stp form;
Step 1.2.1, opens notepad, enrolls batch format transcode, writes complete, preserves into catvbs form;
Step 1.2.2, runs catvbs formatted file, and realize automatically opening CATIA and carry out format conversion one by one to model, the stp form model storage after conversion is in original folder;
Step 2: use the program 3DVIA Sync in 3DVIA Composer to carry out batch format conversion and light-weight technologg to step 1 gained stp form model, obtain 3ds form model;
Step 3: importing in Unity3D by having processed the 3ds form model obtained, using Unity3D to do three-dimensional display to model.
2. a kind of three-dimensional model format conversion according to claim 1 and light weight method, it is characterized in that, batch format transcode described in step 1.2.1, the function realized is: the xls formatted file that read step 1.1.4 obtains, acquisition model sum, obtain the store path of the file of required format transformation successively, under utilizing CATIA software acquisition approach, corresponding movable assembly carries out format conversion, exports the assembly of stp form.
3. a kind of three-dimensional model format conversion according to claim 1 and light weight method, it is characterized in that, described step 2 is when using 3DVIA Sync, local all files wanted light-weighted stp formatted file or comprise stp formatted file are selected in the File Options of menu bar, in the Publish option in menu bar, select or input the file after converting and store path, in " CAD output format ", select " 3D studio Mesh (.3ds) ".
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