CN113609642A - Virtual visualization method for engineering machinery product in immersive virtual reality environment - Google Patents
Virtual visualization method for engineering machinery product in immersive virtual reality environment Download PDFInfo
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
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- G06F30/17—Mechanical parametric or variational design
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Abstract
The invention discloses a virtual visualization method for a engineering mechanical product in an immersive virtual reality environment, which comprises the steps of importing a CAD (computer-aided design) engineering data model of the engineering mechanical product into virtual visualization software Deltagen to generate a virtual visualization model; exporting files of the moving part model group needing animation editing; importing the exported file into animation editing software Maya, performing animation production and animation fitting on the moving part model in the Maya, performing animation baking on the edited animation model, and exporting wrl animation data information file; and importing the exported wrl animation data information file into a Deltagen animation editor, capturing a Deltagen picture and realizing the stereoscopic display of the virtual visualization model in the POWELLLWALL projection display system. The invention realizes the virtual visual display of the engineering mechanical product in the immersive virtual reality environment.
Description
Technical Field
The invention belongs to the technical field of virtual reality, and particularly relates to a virtual visualization method for a mechanical product of a project in an immersive virtual reality environment.
Background
Engineering machinery belongs to complex industrial products, in order to improve design research and development efficiency and avoid trial-manufacturing risks of a prototype, the appearance and interior of the product are developed by using a virtual visualization technology, human-computer work efficiency research can be carried out, design details can be observed or operation posture simulation can be carried out in a real product in a design stage in advance, and before trial-manufacturing of the prototype, the reliability and the rationality of a design scheme are further improved. Deltagen is a top-level virtual visual evaluation tool under the Dasuo system flag, is widely applied to product research and development in the fields of vehicles, aerospace and the like, and can display a high-quality 3D visual model in a POWER WALL virtual environment in real time. In the prior art, virtual visualization schemes include, for example, a method for developing and designing an automobile product based on virtual reality and a VR system are disclosed in chinese patent application CN201910776303.5, and a method for converting an automobile CAD model into a virtual visualization model is proposed. The patent application CN201310600848 of the present invention discloses a method for realizing visualization and interaction of virtual products in CAVE environment, and the patent provides technical ideas and methods in the aspects of construction and optimization of virtual product visualization models, material mapping and real-time rendering of virtual product visualization models, real-time visualization display and interactive application in CAVE environment, and the like.
In the field of engineering machinery, because product working devices and motion devices often relate to complex mechanism action display, the conventional Deltagen software only supports two simple object motion animation editing modes of displacement and rotation, the motion situation of the engineering machinery working devices cannot be reproduced in a POWER WALL immersive virtual environment, and the decision of designers on a virtual prototype is not facilitated. In addition, when the movable part moves in real-time virtual review according to the prior art, the baking shadow map which is calculated on the movable part and the adjacent parts is still in a state before the movable part and the adjacent parts move, so that the reality of a virtual product visualization model is greatly reduced, and the review effect is influenced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a virtual visualization method for a mechanical engineering product in an immersive virtual reality environment, and realizes the three-dimensional display of a virtual visualization model in a POWER WALL projection display system.
In order to solve the technical problem, the invention provides a virtual visualization method of a engineering mechanical product in an immersive virtual reality environment, which comprises the following steps:
importing a CAD (computer-aided design) engineering data model of an engineering mechanical product into virtual visualization software Deltagen to generate a virtual visualization model;
preprocessing a virtual visualization model in a Deltagen, arranging motion component models of a motion mechanism unit in a group form, and exporting a motion component model group needing animation editing into a CSB format file;
continuously executing UV calculation and lighting shadow baking calculation on the virtual visualization model in the Deltagen, and adding a virtual environment effect matched with the virtual visualization model in the scene;
importing the exported CSB format file into animation editing software Maya, performing animation production and animation fitting on the moving part model in the Maya, performing animation baking on the edited animation model, and exporting an wrl animation data information file;
in Deltagen, importing a wrl animation data information file in an export file into a Deltagen animation editor, and dragging moving part models in a virtual visualization model into corresponding animation editors one by one to complete animation import;
adding a switching variable and a trigger to the virtual visualization model so as to switch the virtual visualization model in real time in a virtual environment;
capturing the Deltagen frame enables stereoscopic display of the virtual visualization model in the powerwall projection display system.
Optionally, after the generating the virtual visualization model, the method further includes:
and checking the virtual visualization model generated in the Deltagen software in the Deltagen, if the virtual visualization model is found to have a defective part model, performing modeling again on the defective part in the three-dimensional modeling software, and introducing the reconstructed part model into the Deltagen to complete the virtual visualization model.
Optionally, the preprocessing includes performing data weight reduction processing on the virtual visualization model:
removing invisible surfaces and repeated objects from the virtual visualization model;
merging virtual visual model data according to the system and position conditions of the product parts;
and subdividing and topologically arranging the surface of the virtual visual model according to the requirement of the fineness of part display.
Optionally, the preprocessing includes adjusting a normal direction:
and checking the normal direction of the surface of the virtual visualization model in the Deltagen, and adjusting the normal of the negative direction to be a positive direction.
Optionally, the organizing of the moving part models of the moving mechanism units in the form of a group includes:
firstly, adjusting local coordinates in the virtual visual model to align the forward direction of mechanism motion with the forward direction of a world coordinate y axis, and then executing freeze transformation to eliminate all transformation history information of the virtual visual model;
adjusting the virtual visual model structure tree according to the product structure and the motion state, so that the model groups of all systems of the engineering machinery are divided into respective system Group groups on the same Root tree; each model system Group also comprises subgroups, and the subgroups also comprise subgroups to form system subtrees;
dividing the moving parts of each system into a driving part and a follow-up part, dividing the driving part model at the top of the level of each system subtree, and arranging the follow-up part movably connected with the driving part below the level of the driving part; the moving part models in each moving mechanism unit are independently grouped;
and adjusting local coordinate axes of the Group where the moving part models in the moving mechanism units are located, enabling the local coordinate axes of the Group where the moving units are located to be on the rotating center of each moving part model, and enabling the local coordinate x axis of the Group where the moving part models are located to be aligned with the rotating shaft of each moving part model.
Optionally, the light shadow baking calculation includes:
respectively creating a main light source, an auxiliary light source and a contour light in a scene according to the modeling characteristics of a product;
shadow baking calculations were performed on the moving part model.
Optionally, the shadow baking calculation is performed using an isolation baking method.
Optionally, the importing the exported CSB format file into the animation editing software Maya further includes:
the CSB format file is imported into Maya, the imported model is rotated by 90 degrees along the x axis, and the y axis and the Z axis of the local coordinate of the transformed model are aligned with the Z axis and the-y axis of the world coordinate respectively.
Optionally, the switching variable includes any one or more of camera switching, color switching, geometry switching, logic editing switching, material switching, object switching, combination switching, and front display switching.
Compared with the prior art, the invention has the following beneficial effects: compared with the virtual visualization method in the prior art, the method has better real-time display and review effects of the animation of the complex mechanism, can fully exert the vivid presenting capability of the material and the light and shadow of the Deltagen software, breaks through the animation display limitation of the Deltagen software, and realizes the reproduction of the complex motion condition of the engineering machinery working device in the immersive virtual environment, thereby entering the 'real' product in the design stage to comprehensively observe the design details and the motion interference check of the product design, further improving the reliability and the rationality of the design scheme, and avoiding the trial-production risk of a prototype.
Drawings
FIG. 1 is a schematic flow diagram of the process of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
According to the virtual visualization method for the engineering mechanical product in the immersive virtual reality environment, complex animation editing such as binding and constraint of skeleton skin of the engineering machinery is carried out in professional animation software Maya, all animations are converted into data only containing displacement and rotation, and the data are led into virtual visualization software Deltagen to be continuously and completely processed to form a complete virtual visualization model for the engineering mechanical product. Referring to fig. 1, the following process is included:
1) the method comprises the steps of importing a CAD (computer-aided design) engineering data model (including a complete machine model and all part models) of an engineering mechanical product into virtual visualization software Deltagen to generate a virtual visualization model, checking the virtual visualization model generated in the Deltagen software, if a defective part model exists in the virtual visualization model, re-modeling the defective part in three-dimensional modeling software, importing the reconstructed part model into the Deltagen to complete the virtual visualization model, and ensuring the data integrity and correct assembly relation of the engineering mechanical product.
2) Data are lightened in Deltagen so as to reduce the data volume and reduce the operation load of a computer.
The specific operation of data lightweight comprises the following steps:
removing the invisible surface (B-side) and the repeated object from the virtual visual model;
executing the combination of Alt + C command virtual visual model data according to the conditions of the system, the position, the material and the like of the product parts, and reducing the number of body and object in the visual model structure tree;
the method comprises the steps of subdividing and topological the surface of a virtual visualization model according to requirement of part display fineness, selecting the part model needing to adjust grid fineness in the virtual visualization model, setting a Tolerance (Tolerance) value in subdivision according to the display fineness, setting a recommended range to be 0.01-0.1, finely subdividing the grid when the Tolerance (Tolerance) value is smaller, subdividing the grid, performing Tessellate (subdivision), performing topological operation on the model after subdivision, firstly setting the Tolerance (Tolerance) value in the topology, setting a recommended value to be 0.05, and then performing Topolopy (topology). In order to improve the real-time display effect, the surface curved surface quality of the appearance part needs to be improved, the surface subdivision is provided with a higher precision value, the requirement of the internal structure part on the surface quality is not high, and the surface subdivision can be provided with a lower precision value, so that the data volume is further reduced on the premise of ensuring the display effect.
3) The normal direction of the virtual visualization model surface is checked in Deltagen, and the normal of the negative direction is adjusted to be the positive direction, because the model surface with wrong normal information cannot absorb the illumination information during the shadow baking calculation.
For a solid surface, pointing from the inside of the solid to the outside is the positive normal, i.e. the internal normal, and vice versa is the negative normal. When the model surface is a normal line of a positive direction, the model surface has no special mark color, and if the model surface is a negative direction, the model surface mark is defaulted to purple in the software.
And starting a normal inspection mode through a Backspace key, and turning all the normal (purple) model surfaces in the reverse direction to the positive direction through a shortcut key N (normal turning operation) under the condition of default material, so that the effect that all the model surfaces of the virtual visual model can uniformly absorb correct illumination information is ensured.
4) In the Deltagen, the data arrangement is carried out on the virtual visual model after the normal adjustment in the last step, the purpose is to summarize model data, the models are grouped according to animation or materials, the workload in the later period can be reduced, the material endowment accuracy of the virtual model can be ensured, and the movement mechanism units are arranged in a group form, so that the movement axis can be conveniently defined, and the animation can be successfully edited.
The specific process of data arrangement comprises the following steps:
firstly, adjusting local coordinates in the virtual visual model to align the forward direction of mechanism motion with the forward direction of a world coordinate y axis, and then executing Alt + F command freeze transformation to eliminate all transformation history information of the virtual visual model; the Local Coordinate system (Local Coordinate) is a Coordinate system that uses the center of the object as the origin of coordinates, and the rotation or translation of the object is performed around the Local Coordinate system, and in this case, when the object model performs the rotation or translation, the Local Coordinate system also performs the corresponding rotation or translation. The aim of adjusting the alignment of the local coordinates and the world coordinates is to introduce animation in Deltagen for correct demonstration after animation software Maya edits the animation.
Adjusting the virtual visual model structure tree according to the product structure and the motion state, so that the model groups of all systems of the engineering machinery are divided into respective system Group groups on the same Root tree; each model system Group also comprises subgroups, and the subgroups also comprise subgroups to form system subtrees.
The moving parts of each system are divided into a driving part and a follow-up part, the driving part model is divided at the top of the hierarchy of each system subtree, and the follow-up part movably connected with the driving part is arranged below the hierarchy of the driving part. The motion mechanism unit is composed of a plurality of motion parts, and the motion part models in each motion mechanism unit are independently grouped. If the four-bar linkage mechanism is a movement mechanism unit, the movement mechanism unit comprises four connecting bars, and each connecting bar is an independent movement part;
each moving part model is in a separate subset, each subset having a respective center of rotation. And adjusting local coordinate axes of the Group where the moving part models in the moving mechanism units are located, enabling the local coordinate axes of the Group where the moving units are located to be on the rotating center of each moving part model, enabling the local coordinate x axes of the Group where the moving part models are located to be aligned with the rotating shaft of each moving part model, storing the file, and selecting and exporting the Group of the system moving part models needing animation editing into a CSB format file.
5) In Deltagen, the spread UV calculation in a UV editor is performed on the virtual visual model obtained after the last step of storage according to the shape of the graph, the built model is spread into a plane, and materials and the like can be made on the plane. So as to ensure that the virtual visual model can correctly express the texture effect of the material; the mapping effect of the model is more real.
Then creating lamplight in the scene, performing lamplight shadow baking calculation, wherein the lamplight creating method is to create a main light source, an auxiliary light source and contour light according to the product modeling characteristics, the light source type generally selects direct light (direct lamplight), Local surrounding (Local environment) and the like, the lamplight is placed on an affected model system Group or each system sub-tree, if a cab exists, outdoor lamplight and indoor lamplight are set respectively, and the total number of the lamplight in the whole scene cannot be more than 8 (the default number of the lamplight in the Deltagen environment is at most 8); in the calculation of the virtual visualization model lighting Shadow baking, in order to obtain higher baking Quality, generally, Quality under General is set to be 7, Details under Shadow texture UVs is set to be 20, and Bounce under induction lighting is set to be 2;
in the motion mechanism model shadow baking calculation process, an isolation baking method is adopted, wherein the isolation baking method is used for carrying out local shadow calculation baking on each motion unit of a motion mechanism model in Deltagen, other objects except the motion unit to be subjected to shadow baking are hidden before the local shadow calculation baking, and each motion unit is the minimum motion unit of the motion mechanism capable of carrying out degree of freedom conversion, so that the shadow mapping with too deep color is avoided being calculated due to too close distance of the two models.
6) In the Deltagen, a material and a map are given to the virtual visualization model after shadow baking calculation, then a virtual environment effect matched with the virtual visualization model is added into a scene, and the virtual environment effect form comprises two forms of a high dynamic range environment map or a three-dimensional entity model.
7) Importing the CSB format file exported from Deltagen in the step 4) into animation editing software Maya, performing world coordinate transformation and local coordinate adjustment in Maya, wherein Deltagen and Maya both belong to right-handed Cartesian coordinate systems, but the default upward directions of the Deltagen and the Maya are different, firstly performing coordinate system adjustment, setting the world coordinate of Maya to be in the Z-axis direction, then importing the CSB format file which needs to be subjected to animation editing into Maya, and rotating the imported model by 90 degrees along the x-axis to enable the y-axis and the Z-axis of the local coordinate of the transformed model to be aligned with the Z-axis and the-y-axis of the world coordinate respectively.
8) In Maya, animation and animation fitting are performed on a motion mechanism, and an edited animated model is subjected to animation baking and is derived in a CSB _3 dextile type.
The method comprises the steps of copying a model integrally in situ to obtain a replica model and hiding an original model, carrying out operations such as bone skin binding, constraint setting, path animation editing and the like on the replica model, setting actions according to the motion requirements of an engineering mechanical mechanism, recording key frames for the set actions, finishing animation production of the engineering mechanical mechanism, enabling Deltagen to only read displacement and rotation animation data derived from Maya, enabling the original model to be unhidden, enabling the positions of all parts of the original model in each frame to be completely overlapped with the positions of the parts corresponding to the replica model by using a moving and rotating tool, recording the key frames, enabling the actions of the original model and the replica model to be completely consistent, selecting the original model to bake the animation, deriving the animation and deriving files according to CSB-3 DEXCITE types, and deriving files comprising CSB files and wrl animation data information files.
9) In Deltagen, wrl animation data information files in the Maya export file are imported into an animation editor of Deltagen, at this time, animation record groups which have already been animated appear in an animation list in animation (animation editor), the name of each animation record Group is consistent with that of a system Group or each system sub-tree Group in a virtual visualization model structure tree, the system Group or each system sub-tree Group in the virtual visualization model structure tree is dragged into Targets of the animation record groups in the animation list corresponding to animation (animation editor) one by one, animation import is completed, and composite animation such as complete machine (displacement, rotation and scaling) animation and camera animation is continuously completed in time.
In Maya, animation of each mechanism is only made, not the whole mechanism, after the animation of each mechanism is introduced into Deltagen, animation of each mechanism is combined together, for example, after an arm digging animation of the excavator and a track animation are combined together, complete machine turntable animation is made in the Deltagen, rotation and digging are realized while track motion is carried out, and meanwhile, camera animation is required to be made.
10) In Deltagen, variables (camera switching, color switching, geometry switching, logic editing switching, look switching, object switching, package switching, overlay switching) and triggers are added to the virtual visualization model, so that real-time switching of multiple scheme elements (material, modeling and the like) of the virtual visualization model in a virtual environment is realized, and a final virtual visualization model is obtained.
11) The Deltagen picture is captured through the multichannel fusion software TechViz, the three-dimensional display of the virtual visualization model in the POWELLLWALL projection display system is achieved, the virtual peripheral equipment and the motion capture system are used for carrying out real-time interaction on the virtual visualization model, and therefore observation and interactive application of the virtual product in various states are achieved.
The equipment required by the method comprises the following steps:
the POWELLLWALL projection display system mainly comprises a projector, stereo spectrum glasses, a projector bracket and a projection screen;
the virtual peripheral equipment and the motion capture system comprise a tracking control machine, a tracking camera, a handheld interactive three-dimensional mouse and a tracking equipment submachine;
the image cluster system comprises a computer graphic workstation, a video matrix, a network switch and a display;
the central control and signal switching system (connected with the image cluster system to control the graphic image and the sound signal) comprises a central control device and a KVM; UPS electrical power generating system, stereo set.
The realistic presentation capability of the material and the light and shadow of the Deltagen software can be fully exerted through the technical process method, the animation display limitation of the Deltagen software is broken through, the real-time display and review effects of the animation of the complex mechanism are better, the complex motion situation of the engineering machinery working device is repeated in the immersive virtual environment, the design details and the motion interference check of the product design can be comprehensively observed in the real product in the design stage, the reliability and the rationality of the design scheme are further improved, and the trial production risk of a prototype is avoided.
Example 1:
the following description will be given by taking an XE35U electric excavator as an example:
1) importing a CAD engineering data model of an XE35U electric excavator into Deltagen, comparing and checking the whole digital mechanical parts in a PDM system with a virtual visualization model generated in Deltagen software, if the defective parts exist in the virtual visualization model, re-modeling the defective parts in the three-dimensional modeling software, and importing the reconstructed parts model into the Deltagen until the virtual visualization model is complete in data and correct in assembly relation.
2) In Deltagen, carrying out data weight reduction on the XE35U electric excavator virtual visual model obtained in step 1), deleting an invisible surface (B-side) and repeated objects and empty groups, executing Alt + C command combination virtual visual model data according to the conditions of a system, a position, materials and the like where parts of an XE35U electric excavator product are located, reducing the number of bodies and objects in a visual model structure tree, subdividing and topological the surface of the virtual visual model according to the part display requirements, and improving the real-time display effect by improving the surface curved surface quality of appearance parts of the XE35U electric excavator, such as hoods, interior trim parts and the like, wherein the surface subdivision precision value is set to be 0.001, the surface quality requirement of internal structure parts is not high, and the surface subdivision precision value is set to be 0.01, so that the data volume is further reduced on the premise of ensuring the display effect.
3) In Deltagen, the normal direction of the surface of the XE35U electric excavator virtual visualization model after the previous step of light weight reduction is checked, the model surface with wrong normal information cannot absorb the illumination information during shadow baking calculation, a normal checking mode is started through a Backspace key, all purple model surfaces are turned into the color of the default material through a shortcut key N under the condition of the default material, and the effect that all model surfaces of the XE35U electric excavator virtual visualization model can uniformly absorb the correct illumination information is ensured.
4) In Deltagen, data sorting is carried out on the XE35U electric excavator virtual visual model after the normal adjustment in the previous step, firstly, local coordinates of the XE35U electric excavator virtual visual model are adjusted to be aligned with the motion forward direction of a world coordinate y axis, Alt + F command freezing transformation is carried out to eliminate all transformation history information of the XE35U electric excavator virtual visual model, a virtual visual model structure tree is adjusted according to the product structure and the motion state of a working device of the XE35U electric excavator, the virtual visual model structure tree is firstly divided into an getting-on system, a getting-off system and the like, model groups of all systems are divided into system Group groups on the same Root tree, and the getting-on system is divided into the following sub-trees according to the difference of the systems, positions, materials and states of parts: the system comprises a working device system subtree, an interior system subtree, a hood system subtree, a cab door system subtree, a cab window system subtree, a plurality of system subtrees divided according to materials and the like; the getting-off system is divided into a walking system subtree and the like. Continuously dividing a system subtree in a system subtree of a working device according to the installation and motion dependency of movable part parts such as a movable arm, an arm, a bucket, a movable arm hydraulic cylinder, an arm hydraulic cylinder, a bucket hydraulic cylinder and the like, dividing a driving part model at the top of the hierarchy of each system subtree, arranging a follow-up part movably connected with the driving part below the hierarchy of the driving part, and dividing each hierarchy into each hierarchy Group as a motion unit of the movable part; and adjusting the local coordinate axes of the Group in which each motion unit is positioned, enabling the local coordinate axes of the Group in which each motion unit is positioned to be positioned at the rotation center of each motion unit, simultaneously enabling the local coordinate x axes of each motion unit to be aligned with the rotation axis of each motion unit, and selecting and exporting the Group of the working device system needing animation editing into a CSB format file.
5) Performing extended UV calculation in a UV editor on the XE35U electric excavator virtual visualization model obtained in the last step according to the shape of a graph to ensure that the virtual visualization model can correctly express the texture effect of a material, then creating lamplight in a scene, and performing lamplight shadow baking calculation, wherein the lamplight creating method comprises the steps of creating a main light source, an auxiliary light source and a contour light according to the modeling characteristics of a product, the types of the light sources are selected from direct light, Local lighting and the like, the lamplight is placed on a model system Group or each system sub-tree affected by the lamplight, and outdoor lamplight and indoor lamplight are respectively set; in the calculation of the lighting Shadow baking of the virtual visualization model of the XE35U electric excavator, in order to obtain higher baking Quality, Quality under General is set to be 7, Details under Shadow texture UVs is set to be 20, and Bounce under induction illumination is set to be 2; in the motion mechanism model shadow baking calculation process, an isolation baking method is adopted, wherein the isolation baking method is used for carrying out local shadow calculation baking on each motion unit of a motion mechanism model in Deltagen, other objects except the motion unit to be subjected to shadow baking are hidden before the local shadow calculation baking, and each motion unit is the minimum motion unit of the motion mechanism capable of carrying out degree of freedom conversion, so that the shadow mapping with too deep color is avoided being calculated due to too close distance of the two models.
6) Giving materials and maps to the XE35U electric excavator visualization model after shadow baking calculation in the Deltagen, and then adding a virtual environment effect matched with the visualization model in a scene, wherein the virtual environment effect is in the form of a high dynamic range environment map.
7) Importing a CSB format file into animation editing software Maya, performing world coordinate transformation and local coordinate adjustment in Maya, wherein both Deltagen and Maya belong to right-hand Cartesian coordinate systems, but default upward directions of the Deltagen and the Maya are different, firstly performing coordinate system adjustment, setting the world coordinate of the Maya to be in the Z-axis direction, then importing the XE35U electric excavator working device which needs to perform animation editing, importing the CSB format file into the Maya, rotating the imported model by 90 degrees along the x-axis, and enabling the y-axis and the Z-axis of the local coordinate of the transformed model to be respectively aligned with the Z-axis and the-y-axis of the world coordinate.
8) In Maya, animation production and animation fitting are carried out on an XE35U electric excavator working device, the model is integrally copied in situ and an original model is hidden, animation production of the excavator working device such as bone covering binding, constraint setting and the like is carried out on a copy model, key frames are recorded on the set animation, as Deltagen can only read displacement and rotation animation data derived from Maya, after the original model needs to be unhidden, moving and rotating tools are used for enabling the positions of all parts of the XE35U electric excavator working device in each frame to be completely overlapped with the corresponding part positions of the copy model and recording the key frames, and after the actions of the original model and the copy model are completely consistent, the original model is selected to bake the animation and is derived in a CSB _3 DEITEXC type.
9) In Deltagen, wrl animation data information files in a Maya export file are imported into a Deltagen animation editor, a work device system sub-tree Group in a virtual visual model structure tree of an XE35U electric excavator is dragged into Targets corresponding to animation one by one, the animation import of the XE35U electric excavator work device is completed, and the composite animation production such as object (displacement, rotation and scaling) animation and camera animation is continuously completed in time.
10) In the Deltagen, adding variables (camera, color, geometry, logic, look, object, package, overlay) and a trigger to the XE35U electric excavator virtual visualization model to obtain a final XE35U electric excavator virtual visualization model.
11) The method includes the steps that a Deltagen picture is captured through multi-channel fusion software TechViz, stereoscopic display of a XE35U electric excavator virtual visualization model in a POWER WALL projection display system is achieved, real-time interaction is conducted on the XE35U electric excavator virtual visualization model through virtual peripheral equipment and an action capture system, and therefore observation and interactive application of virtual products in various states are achieved.
The realistic presentation capability of the material and the light and shadow of the Deltagen software can be fully exerted through the technical process method, the animation display limitation of the Deltagen software is broken through, the real-time display and review effects of the animation of the complex mechanism are better, the complex motion situation of the engineering machinery working device is repeated in the immersive virtual environment, the design details and the motion interference check of the product design can be comprehensively observed in the real product in the design stage, the reliability and the rationality of the design scheme are further improved, and the trial production risk of a prototype is avoided.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A virtual visualization method for a mechanical product of a construction machine in an immersive virtual reality environment is characterized by comprising the following steps:
importing a CAD (computer-aided design) engineering data model of an engineering mechanical product into virtual visualization software Deltagen to generate a virtual visualization model;
preprocessing a virtual visualization model in a Deltagen, arranging motion component models of a motion mechanism unit in a group form, and exporting a motion component model group needing animation editing into a CSB format file;
continuously executing UV calculation and lighting shadow baking calculation on the virtual visualization model in the Deltagen, and adding a virtual environment effect matched with the virtual visualization model in the scene;
importing the exported CSB format file into animation editing software Maya, performing animation production and animation fitting on the moving part model in the Maya, performing animation baking on the edited animation model, and exporting an wrl animation data information file;
importing wrl animation data information files in the export files into a Deltagen animation editor, and dragging the moving part models in the virtual visual model into the corresponding animation editor one by one to complete animation import;
in the Deltagen, a switching variable and a trigger are added to the virtual visualization model so as to switch the virtual visualization model in real time in a virtual environment;
capturing the Deltagen frame enables stereoscopic display of the virtual visualization model in the powerwall projection display system.
2. The virtual visualization method for the engineering machinery product in the immersive virtual reality environment according to claim 1, wherein after the generating the virtual visualization model, the method further comprises:
and checking the virtual visualization model generated in the Deltagen software in the Deltagen, if the virtual visualization model is found to have a defective part model, performing modeling again on the defective part in the three-dimensional modeling software, and introducing the reconstructed part model into the Deltagen to complete the virtual visualization model.
3. The method for virtually visualizing the work machine product in the immersive virtual reality environment as recited in claim 1, wherein the preprocessing comprises performing data weight reduction processing on the virtual visualization model:
removing invisible surfaces and repeated objects from the virtual visualization model;
merging virtual visual model data according to the system and position conditions of the product parts;
and subdividing and topologically arranging the surface of the virtual visual model according to the requirement of the fineness of part display.
4. A method for virtual visualization of a work machine product in an immersive virtual reality environment as recited in claim 3, wherein the preprocessing further comprises adjusting a normal direction:
and checking the normal direction of the surface of the virtual visualization model in the Deltagen, and adjusting the normal of the negative direction to be a positive direction.
5. The virtual visualization method for the engineering machinery product in the immersive virtual reality environment according to claim 1, wherein the organizing of the moving part models of the moving mechanism units in the form of groups comprises:
adjusting local coordinates in the virtual visual model to align the forward direction of mechanism motion with the forward direction of a world coordinate y axis, and executing freeze transformation to eliminate all transformation history information of the virtual visual model;
adjusting the virtual visual model structure tree according to the product structure and the motion state, so that the model groups of all systems of the engineering machinery are divided into respective system Group groups on the same Root tree; each model system Group also comprises subgroups, and the subgroups also comprise subgroups to form system subtrees;
dividing the moving parts of each system into a driving part and a follow-up part, dividing the driving part model at the top of the level of each system subtree, and arranging the follow-up part movably connected with the driving part below the level of the driving part; the moving part models in each moving mechanism unit are independently grouped;
and adjusting local coordinate axes of the Group where the moving part models in the moving mechanism units are located, enabling the local coordinate axes of the Group where the moving units are located to be on the rotating center of each moving part model, and enabling the local coordinate x axis of the Group where the moving part models are located to be aligned with the rotating shaft of each moving part model.
6. The method of claim 1, wherein the light shadow baking calculation comprises:
respectively creating a main light source, an auxiliary light source and a contour light in a scene according to the modeling characteristics of a product;
shadow baking calculations were performed on the moving part model.
7. The virtual visualization method for the engineering mechanical product in the immersive virtual reality environment of claim 6, wherein the shadow baking calculation is performed by an isolation baking method.
8. The method for virtually visualizing a work machine product in an immersive virtual reality environment of claim 1, wherein importing the exported. CSB-format file into the animation editing software Maya further comprises:
the CSB format file is imported into Maya, the imported model is rotated by 90 degrees along the x axis, and the y axis and the Z axis of the local coordinate of the transformed model are aligned with the Z axis and the-y axis of the world coordinate respectively.
9. The virtual visualization method for the engineering mechanical product in the immersive virtual reality environment according to claim 1, wherein the switching variables comprise any one or more of camera switching, color switching, geometry switching, logic editing switching, material switching, object switching, combination switching and front display switching.
10. The virtual visualization method for the engineering mechanical product in the immersive virtual reality environment as claimed in claim 1, wherein a Deltagen picture is captured by using a multichannel fusion software TechViz.
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