CN108268257B - Line track drawing method and system applied to VR scene - Google Patents
Line track drawing method and system applied to VR scene Download PDFInfo
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- CN108268257B CN108268257B CN201611242442.2A CN201611242442A CN108268257B CN 108268257 B CN108268257 B CN 108268257B CN 201611242442 A CN201611242442 A CN 201611242442A CN 108268257 B CN108268257 B CN 108268257B
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Abstract
The invention provides a line track drawing method and system applied to a VR scene, wherein the method comprises the following steps: uniformly packaging a bottom layer SDK of operating equipment of VR sensing equipment; providing an input callback interface and operation information of the operation equipment to a service layer, wherein the operation information comprises a space coordinate and a rotation angle; through creating a LineRender track brush in a brush manager of a service layer, after operation information of an operation device is acquired, the operation device is rendered into a VR scene, and a corresponding operation track is generated. The invention is based on the Unity engine, uses the LineRender component, the particle system component and the 2D picture component in the Unity engine to form a set of track brush components under VR by matching with the operation equipment, provides related functional support for external programs in the form of Unity plug-in, can be quickly integrated into VR products developed by Unity, and provides corresponding functional support.
Description
Technical Field
The invention relates to the field of VR (virtual reality), in particular to a line track drawing method and system applied to a VR scene.
Background
At present, a line trace Brush component applied to a virtual reality (VR for short) product in the market is 'Tilt Brush' of google corporation, and the product is application software for performing 3D space drawing in a VR scene under HTCVive equipment. However, because the Tilt Brush is an independent closed-source application software, there are disadvantages that the user is not supported to perform corresponding secondary development based on the closed-source factor. If a user wants to have a Tilt Brush-like drawing function in his VR project, the developer needs to research and develop the drawing again. In a specific application scenario in the prior art, if a certain VR product needs to mark a certain part of an automobile in a VR scenario, and the marking mode is to mark the part through an HTC handle, a related developer needs to develop the function of such a brush pen, but cannot directly render a required line effect in the VR scenario through marking.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the line track drawing method and system applied to the VR scene are universal and can be directly applied without secondary development of painting brush application.
In order to solve the technical problems, the invention adopts the technical scheme that:
the line track drawing method applied to the VR scene comprises the following steps:
uniformly packaging a bottom layer SDK of operating equipment of VR sensing equipment;
providing an input callback interface and operation information of the operation equipment to a service layer, wherein the operation information comprises a space coordinate and a rotation angle;
through creating a LineRender track brush in a brush manager of a service layer, after operation information of an operation device is acquired, the operation device is rendered into a VR scene, and a corresponding operation track is generated.
The invention provides another technical scheme as follows:
be applied to line track drawing system in VR scene, include:
the packaging module is used for uniformly packaging the bottom layer SDK of the operating equipment of the VR sensing equipment;
the providing module is used for providing an input callback interface and operation information of the operation equipment for a service layer, wherein the operation information comprises a space coordinate and a rotation angle;
and the first track generation module is used for rendering the operation information of the operation equipment into a VR scene to generate a corresponding operation track after the operation information of the operation equipment is acquired through a LineRender track brush created in a brush manager of the service layer.
The invention has the beneficial effects that: the drawing tool different from the prior art has no universality in the function of 3D space drawing in a VR scene, and needs to be developed again by a user. The invention uses the form of the dynamic library to uniformly package the bottom layer SDK of the painting brush, so that the attention to the bottom layer code is not needed, and the use of a developer is more convenient; by providing an input callback interface and operation information of the operation equipment for a service layer of the operation system, the service layer does not need to acquire related data information of the operation equipment in a complicated way; and rendering an operation track in a VR scene by directly using a LineRender track brush under the Unity engine to obtain operation information of the service layer, and realizing opening to the outside in a form of a Unity plug-in. The invention provides related functional support for external programs in a Unity plug-in form, can be quickly integrated into VR products, supports the presentation of line tracks, realizes the universality of a line track drawing tool in a VR scene, does not need a user to perform corresponding secondary development, obviously improves the convenience of use, and is more beneficial to popularization and use.
Drawings
FIG. 1 is a schematic flow chart of a line trajectory drawing method applied to a VR scene according to the present invention;
FIG. 2 is a schematic flow chart according to a first embodiment of the present invention;
FIG. 3 is a schematic flow chart of a second embodiment of the present invention;
FIG. 4 is a schematic diagram showing the structural components of functional modules of the line trace drawing system applied to a VR scene according to the present invention;
fig. 5 is a schematic structural diagram of a functional module according to a fourth embodiment of the present invention.
Description of reference numerals:
1. packaging the module; 2. providing a module; 3. a first trajectory generation module;
4. a second trajectory generation module; 5. a filtration module; 6. a third trajectory generation module;
7. a first calculation module; 8. a second calculation module; 9. a storage module; 10. and a drawing module.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The most key concept of the invention is as follows: uniformly packaging the bottom layer SDK of the painting brush; providing an input callback interface and operation information of an operation device for a service layer of an operation system; and directly rendering the operation track of the operation information acquired by the service layer in the VR scene by using a LineRender track brush under the Unity engine.
The technical terms related to the invention are explained as follows:
referring to fig. 1, the present invention provides a line trajectory drawing method applied to a VR scene, including:
uniformly packaging a bottom layer SDK of operating equipment of VR sensing equipment;
providing an input callback interface and operation information of the operation equipment to a service layer, wherein the operation information comprises a space coordinate and a rotation angle;
through creating a LineRender track brush in a brush manager of a service layer, after operation information of an operation device is acquired, the operation device is rendered into a VR scene, and a corresponding operation track is generated.
Further, the method also comprises the following steps:
and after the particle system track paintbrush in the paintbrush manager acquires the operation information, generating a corresponding operation track in a VR scene through a particle emitter according to the operation information.
As can be seen from the above description, the brush manager of the present invention further supports a trajectory brush function based on a particle system, and can draw a corresponding operation trajectory having a cool 3D particle special effect in a VR scene according to operation information through the functional component.
Further, the method also comprises the following steps:
after the plane track paintbrush in the paintbrush manager acquires the operation information, filtering out the space coordinates of the repeated positions in the operation information according to a density filtering algorithm;
and splicing the operation tracks by the sprite technology according to the filtered space coordinates.
As can be seen from the above description, the brush manager of the present invention further supports a 2D picture-based trace brush function, and can present an operation trace in a planar brush effect form, thereby implementing diversified presentation of the operation trace and providing more brush functions for a user.
Further, the method also comprises the following steps:
storing a collision body node under each node of the operation track, and calculating and acquiring capsule collision bodies of two adjacent nodes through the relationship between two points;
and connecting adjacent capsule collision bodies through Joint nodes, thereby calculating the line collision body of the operation track.
As can be seen from the above description, the present invention embeds collision bodies in each node of the operation trajectory in a capsule shape having a simple structure, achieving superiority in collision performance; the joint nodes are connected according to the adjacent capsule collision bodies, so that the line collision body of the operation track is obtained through calculation, the operation of the operation track is realized, the operations of grabbing, deleting and the like of the operation track are supported, a user can edit the operation track conveniently, and the application function is enriched.
Further, the method also comprises the following steps:
storing a line track file comprising operation information, data of an operation track and data of a line collision body to the local in a PB format;
and drawing an operation track in the VR scene by using a brush manager through reading and analyzing the line track file.
As can be seen from the above description, the present invention stores data in PB format, and has the advantages of large data storage amount and small storage occupation space; and the reproduction function of the operation track is realized by reading the analysis line track file.
The invention provides another technical scheme as follows:
referring to fig. 4, a line trajectory drawing system applied to a VR scene includes:
the packaging module is used for uniformly packaging the bottom layer SDK of the operating equipment of the VR sensing equipment;
the providing module is used for providing an input callback interface and operation information of the operation equipment for a service layer, wherein the operation information comprises a space coordinate and a rotation angle;
and the first track generation module is used for rendering the operation information of the operation equipment into a VR scene to generate a corresponding operation track after the operation information of the operation equipment is acquired through a LineRender track brush created in a brush manager of the service layer.
Further, the method also comprises the following steps:
and the second track generation module is used for generating a corresponding operation track in a VR scene through the particle emitter according to the operation information after the operation information is acquired by the particle system track paintbrush in the paintbrush manager.
Further, the method also comprises the following steps:
the filtering module is used for filtering out the spatial coordinates of repeated positions in the operation information according to a density filtering algorithm after the operation information is acquired by the planar track paintbrush in the paintbrush manager;
and the third track generation module is used for splicing the operation tracks by the sprite technology according to the filtered space coordinates.
Further, the method also comprises the following steps:
the first calculation module is used for storing a collision body node under each node of the operation track and calculating and acquiring a capsule collision body of two adjacent nodes through a two-point relation;
and the second calculation module is used for connecting the adjacent capsule collision bodies through Joint nodes so as to calculate and obtain the line collision body of the operation track.
Further, the method also comprises the following steps:
the storage module is used for storing a line track file comprising operation information, data of an operation track and data of a line collision body to the local in a PB format;
and the drawing module is used for drawing the operation track in the VR scene by reading and analyzing the line track file and using the brush manager.
Example one
Referring to fig. 2, the embodiment provides a line trajectory drawing method applied to a VR scene, and a set of trajectory brush components under VR is formed by using related components in an engine and cooperating with an operating device based on a Unity engine, so that a related function support is provided for an external program in a Unity plug-in form, and the method can be quickly integrated into a VR product developed by Unity to provide a corresponding function support.
The operating equipment of the VR sensing equipment in this embodiment is described by taking an HTC Vive handle as an example;
the line trajectory drawing method of this embodiment may specifically include the following steps:
s1: uniformly packaging a bottom layer SDK of operating equipment of VR sensing equipment;
specifically, the bottom layer codes of the SDK of the HTC Vive handle provided by the HTC Vive official are packaged in a unified mode, and after the unified packaging is carried out, developers do not need to care about the bottom layer codes of the operating equipment, so that the development is more convenient to use. The developer only needs to import the DLL in the project and some referenced resources in the project, and can use the brush function by calling a plurality of simple interfaces. Without developing from the beginning of the development of the bottom layer and without concern for how the bottom layer is specifically implemented. After the bottom layer operation is finished, the space coordinate information, the interaction information and the like which may be needed by the developer are fed back to the developer, so that the developer can call and acquire data conveniently.
S2: providing an input callback interface and operation information of the operation equipment to a service layer, wherein the operation information comprises a space coordinate and a rotation angle;
specifically, the hardware input callback interface of the HTC Vive handle and the operation information obtained through the hardware input callback interface are provided for the service layer on the upper layer, such as a space coordinate, a rotation angle and the like, so that the upper layer service does not need to obtain the operation information of the HTC Vive handle in a complicated manner.
S3: by creating various types of track brushes provided by a brush manager in a service layer, after operation information of operation equipment is acquired, a corresponding operation track is generated in a VR scene according to the operation information.
Specifically, after acquiring the operation information of the HTC Vive handle through a painting brush manager created in a service layer, storing the operation information into an array memory; operation traces for different effects may then be generated by following types of trace brushes based on the Unity engine provided by the brush manager.
S31: and a LineRender track brush in the brush manager assigns the operation information in the array memory to a LineRender component, renders the coordinate information in the operation information to a VR scene through the LineRender component, and generates a corresponding operation track.
Based on the operation track drawn by the LineRender track brush, more operations can be performed on lines in the track, such as setting colors, widths and the like.
S32: and generating a corresponding operation track in the VR scene through the particle emitter according to the operation information by a particle system track brush in the brush manager.
Specifically, by placing a particle emitter at the vertex of the trajectory, the emitter will move according to the coordinate information in the array memory, the lifetime of the particle emitter is set to be infinite long, and particles are generated within a short distance, thereby forming an operation trajectory with particle effects.
The operation track drawn by the track brush based on the particle system has more cool and more various special effect presentation effects, such as a wash ink special effect, a glare special effect, an FT shadow special effect and the like.
S33: filtering out the spatial coordinates of the repeated positions in the operation information according to a density filtering algorithm by a plane track paintbrush in a paintbrush manager, and creating a sprite to be spliced into an operation track at a corresponding coordinate point according to the filtered spatial coordinates;
specifically, because the 2D plane is different from the display effect of the three-dimensional space that the 3D plane has, after the three-dimensional space coordinate system that the VR sensing device based on 3D obtained is changed into the two-dimensional space coordinate system of the 2D plane, there will be coordinate overlapping of many repeated positions, consequently, through the filtration to resetting the coordinate, can obtain the coordinate system that is succinct relatively, the 2D plane operation track that draws in view of the above is also more accurate.
The steps S31-S33 are parallel coexistence steps, and after the user selects one of the types of the track brushes through the brush manager, the user executes a corresponding track brush operation to generate an operation track corresponding to an effect in a VR scene.
The line track drawing method applied to the VR scene in the embodiment can be opened outwards in the form of a Unity plug-in (a LineRender track painting brush, a particle system track painting brush and a plane track painting brush), and a user can directly call a painting brush manager through a service layer of an operating system to draw a line track in real time in the VR scene without carrying out secondary development on a drawing tool; and the operation tracks with various forms of effects are presented, and the requirements of users on different drawing effects of the line tracks are met.
Example two
Referring to fig. 3, in the embodiment, on the basis of the first embodiment, the line trajectory is further extended, the function of drawing the line trajectory is enriched, and the storage mode of the operating system is optimized. Specifically, the same points are not described repeatedly, and the differences are as follows:
after the step of S3, after generating the operation trajectory, the method further includes:
s4: storing a collision body node under each node of the operation track, and calculating and acquiring capsule collision bodies of two adjacent nodes through the relationship between two points; and connecting adjacent capsule collision bodies through Joint nodes, thereby calculating the line collision body of the operation track.
Specifically, the operation trajectory is composed of a plurality of nodes, and capsule collision bodies are built in each node, and the front and rear capsule collision bodies are connected by Joint nodes to calculate a line collision body of the operation trajectory. Therefore, editable operation of the operation track in the VR scene is realized, and the operation track can be grabbed, deleted, moved and the like based on the capsule collision body; optimizing the VR experience for the user.
In a specific embodiment, the method further includes the step of localizing the storage:
s5: and storing a line trace file comprising the operation information, the data of the operation trace and the data of the line collision body into the local in a PB format for calling.
Specifically, by integrating the PB in Unity, the PB is used to store all data including operation information, trajectory data of an operation trajectory, texture data, and the like, and is stored locally in the. The method and the device can realize that a large amount of data is stored in a small resource occupation space, and have the advantages of large storage capacity and small occupation space.
In a specific embodiment, the method further includes a function of implementing operation track reproduction based on the line track file stored locally. Specifically, the method comprises the following steps:
s6: and obtaining related data by reading and analyzing the line track file, and then drawing an operation track in a VR scene by using a brush manager according to the obtained data. Therefore, the operation track is redrawn in the VR scene according to the requirement in the subsequent application.
The method provided by the embodiment is based on the Unity engine, uses the LineRender component, the particle system component and the 2D picture component in the Unity engine, and cooperates with the operation device to form a set of track brush components under VR, and provides related functional support for external programs in the form of Unity plug-in, so that the method can be quickly integrated into VR products developed by Unity to provide corresponding functional support.
EXAMPLE III
The embodiment is a specific application scenario provided based on the second embodiment.
A certain VR product needs to mark a certain part of an automobile in a VR scene, the marking mode is that the marking mode is marked through an HTC Vive handle, a related developer does not need to develop the functions of the painting brush, the developer only needs to introduce the DLL and the resource file in the project into the project, and then an interface for starting the painting brush is called at a place where the painting brush function needs to be started. The user can draw through the HTC device, and the brush component feeds back data such as spatial coordinates, rotation angle and the like to the developer in real time during the drawing process, and the developer can perform logic operations related to specific services through the data. And secondary development can be carried out on the basis.
Example four
Referring to fig. 5, the present embodiment is a line trajectory drawing system applied to a VR scene based on the second embodiment, and specifically includes:
the packaging module 1 is used for uniformly packaging a bottom layer SDK of operating equipment of VR sensing equipment;
the providing module 2 is used for providing an input callback interface and operation information of the operation equipment for a service layer, wherein the operation information comprises a space coordinate and a rotation angle;
the first track generation module 3 is configured to render the operation information of the operation device into a VR scene after obtaining the operation information of the operation device through a LineRender track brush created in a brush manager of the service layer, and generate a corresponding operation track;
the second trajectory generation module 4 is configured to generate, by a particle emitter, a corresponding operation trajectory in a VR scene according to the operation information after the operation information is acquired by a particle system trajectory brush in the brush manager;
the filtering module 5 is used for filtering out the spatial coordinates of the repeated positions in the operation information according to a density filtering algorithm after the operation information is acquired by the planar track paintbrush in the paintbrush manager;
the third track generation module 6 is used for splicing into an operation track through a sprite technology according to the filtered space coordinates;
the first calculation module 7 is used for storing a collision body node under each node of the operation track and calculating and acquiring a capsule collision body of two adjacent nodes through a two-point relationship;
the second calculating module 8 is used for connecting the adjacent capsule collision bodies through Joint nodes, so that a line collision body of the operation track is calculated;
the storage module 9 is configured to store a line trace file including operation information, data of an operation trace and data of a line collision in a PB format to a local;
and the drawing module 10 is configured to draw an operation track in a VR scene by reading and analyzing the line track file using a brush manager.
In summary, the line track drawing method and system applied to the VR scene provided by the invention do not need to care about the bottom layer code, and are more convenient for developers to use; the service layer does not need to acquire related data information of the operating equipment in a complicated way; meanwhile, related function support is provided for an external program in a Unity plug-in form, the function support can be quickly integrated into a VR product, the line track presentation is supported, the universality of a line track drawing tool in a VR scene is realized, a user does not need to perform corresponding secondary development, the use convenience is obviously improved, and the popularization and the use are facilitated; furthermore, the operation tracks with various forms of effects are presented, and the requirements of users on different drawing effects of the line tracks are met; furthermore, operations such as grabbing, deleting and moving of operation tracks are supported, and VR experience of users is optimized; finally, the data storage mode also has the advantages of large storage capacity and small occupied space.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (4)
1. The line track drawing method applied to the VR scene is characterized by comprising the following steps:
uniformly packaging a bottom layer SDK of operating equipment of VR sensing equipment;
providing an input callback interface and operation information of the operation equipment to a service layer, wherein the operation information comprises a space coordinate and a rotation angle;
through a LineRender track painting brush created in a painting brush manager of a service layer, after operation information of operation equipment is acquired, the operation information is rendered into a VR scene, and a corresponding operation track is generated;
further comprising:
after a particle system track brush in the brush manager acquires the operation information, generating a corresponding operation track in a VR scene through a particle emitter according to the operation information;
further comprising:
after the plane track paintbrush in the paintbrush manager acquires the operation information, filtering out the space coordinates of the repeated positions in the operation information according to a density filtering algorithm;
splicing into an operation track by a sprite technology according to the filtered space coordinates;
further comprising:
storing a collision body node under each node of the operation track, and calculating and acquiring capsule collision bodies of two adjacent nodes through the relationship between two points;
and connecting adjacent capsule collision bodies through Joint nodes, thereby calculating the line collision body of the operation track.
2. The method of line trajectory rendering for application to a VR scene of claim 1, further comprising:
storing a line track file comprising operation information, data of an operation track and data of a line collision body to the local in a PB format;
and drawing an operation track in the VR scene by using a brush manager through reading and analyzing the line track file.
3. Be applied to line track drawing system in VR scene, its characterized in that includes:
the packaging module is used for uniformly packaging the bottom layer SDK of the operating equipment of the VR sensing equipment;
the providing module is used for providing an input callback interface and operation information of the operation equipment for a service layer, wherein the operation information comprises a space coordinate and a rotation angle;
the first track generation module is used for rendering operation equipment into a VR scene after acquiring operation information of the operation equipment through a LineRender track brush created in a brush manager of a service layer to generate a corresponding operation track;
further comprising:
the second track generation module is used for generating a corresponding operation track in a VR scene through the particle emitter according to the operation information after the operation information is acquired by the particle system track paintbrush in the paintbrush manager;
further comprising:
the filtering module is used for filtering out the spatial coordinates of repeated positions in the operation information according to a density filtering algorithm after the operation information is acquired by the planar track paintbrush in the paintbrush manager;
the third track generation module is used for splicing into an operation track through a sprite technology according to the filtered space coordinates;
further comprising:
the first calculation module is used for storing a collision body node under each node of the operation track and calculating and acquiring a capsule collision body of two adjacent nodes through a two-point relation;
and the second calculation module is used for connecting the adjacent capsule collision bodies through Joint nodes so as to calculate and obtain the line collision body of the operation track.
4. The line trace rendering system for application to a VR scene of claim 3, further comprising:
the storage module is used for storing a line track file comprising operation information, data of an operation track and data of a line collision body to the local in a PB format;
and the drawing module is used for drawing the operation track in the VR scene by reading and analyzing the line track file and using the brush manager.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1763784A (en) * | 2005-11-23 | 2006-04-26 | 北京航空航天大学 | Three-dimensional scene real-time drafting framework and drafting method |
| CN104536743A (en) * | 2014-12-19 | 2015-04-22 | 中国电子科技集团公司第十五研究所 | Map plotting method and system based on Android operating system |
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| US9767618B2 (en) * | 2015-01-28 | 2017-09-19 | Samsung Electronics Co., Ltd. | Adaptive ambisonic binaural rendering |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1763784A (en) * | 2005-11-23 | 2006-04-26 | 北京航空航天大学 | Three-dimensional scene real-time drafting framework and drafting method |
| CN104536743A (en) * | 2014-12-19 | 2015-04-22 | 中国电子科技集团公司第十五研究所 | Map plotting method and system based on Android operating system |
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