CN103310488A - mental ray rendering-based virtual reality rendering method - Google Patents
mental ray rendering-based virtual reality rendering method Download PDFInfo
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- CN103310488A CN103310488A CN2013100893539A CN201310089353A CN103310488A CN 103310488 A CN103310488 A CN 103310488A CN 2013100893539 A CN2013100893539 A CN 2013100893539A CN 201310089353 A CN201310089353 A CN 201310089353A CN 103310488 A CN103310488 A CN 103310488A
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Abstract
The invention belongs to the virtual reality technology, and particularly relates to a virtual reality technique adopting mental ray rendering, i.e. a mental ray rendering-based virtual reality rendering method. The rendering method includes pre-production and post-processing, and is characterized in that: pre-production includes the following steps: (A) a mental ray renderer is adopted to render object models; (B) textures are set for the object models in a scene, and Arch and Design textures, Autodesk textures and building textures in the mental ray rendering engine are adopted; (C) photometric directional lights, free lights and a daylight system in the mental ray rendering engine are adopted to set lighting sources in the scene; (D) rendering parameters are set, and an mr photographic exposure control system is called to accurately control scene illumination to test the scene-rendering effect; (E) Render To Texture parameters are set, Render To Texture is performed, and object models undergoing Render To Texture and corresponding textures are generated. The rendering method can enhance the Render To Texture effect of virtual reality, increases the degree of realism of display and improve the immersion of users.
Description
Technical field
The invention belongs to virtual reality technology, particularly the virtual reality technology played up of a kind of mental of employing ray.
Background technology
Virtual reality technology (be called for short VR) claims clever border technology again, be the property immersed, interactivity and imagination be the computer advanced man-machine interface of essential characteristic.It has fully utilized computer graphics, emulation technology, multimedia technology, artificial intelligence technology, computer networking technology, parallel processing technique and multi-sensor technology, sense organ functions such as anthropomorphic dummy's vision, the sense of hearing, sense of touch, the people can be immersed in the virtual boundary of computing machine generation, and can carry out real-time, interactive with it by modes such as language, gesture, mouse and keyboards, created a kind of multidimensional information space of getting married, be one developing, have a new technology of far-reaching potential application direction.
At present, the VRP technology platform that allusion quotation numeral scientific ﹠ technical corporation develops is looked in being by domestic most widely used virtual reality technology system general, that visual effect is best.In to look allusion quotation numeral scientific ﹠ technical corporation be virtual reality technology solution provider and related service provider leading in the world, VRP software is its product platform with independent intellectual property right.With regard to the present actual level that reaches, the VRP platform is done perfectly relatively in mutual this link, but because the technology of commonly using of playing up is not the technology of international highest level, thereby true to nature not enough to the visual simulation reproduction of objective world, influenced the virtual effect of immersing and conceiving two links.
Computer system is set up virtual three-dimensional environment by vector calculus, and the three-dimensional body of creating not only has specific shape and position, and can give specific material properties, places under the irradiation of specific light source, and can influence each other.But because vector image itself does not have true fine and smooth visual effect as the photo, therefore can not make the user produce feeling of immersion.For this reason, we can use rational render engine, set out by specific viewpoint, by playing up computing three-dimensional scenic is carried out the digitizing description, generation has the spatial image (being the two-dimensional bitmap of photo level) of correct color relations, shadow relation and material texture, yet thisly plays up computing and need expend the regular hour.
Different with general Computerized three-dimensional technology is that virtual reality technology must possess the function that allows the user independently roam in its virtual environment.Autonomous roaming is feature with the viewpoint that changes the observer constantly, and according to usual method, viewpoint of every conversion all will be played up once again, to obtain corresponding spatial image.For the sense of reality that realizes roaming, require thisly to play up computing and consider all physical factors in the scene as far as possible; For the smoothness sense that realizes roaming, require again to play up the consuming time close to 0 of computing, be limited to present computer hardware level and play up technology, these two is difficult to unified.The general technology of curing that adopts of existing VR-Platform solves this contradiction, namely according to setting color and the material properties of different three-dimensional bodies, be recorded on its each face by the method that each three-dimensional body is played up respectively its due visual signature under the light irradiation that scene sets in advance, because for each three-dimensional body in the scene has been played up such one " coat " (technical term is " curing pinup picture ") in advance, just need not go again in the roam procedure and play up that (actual is to advance to the production phase with playing up computing, decompose each face of each three-dimensional body, undertaken by the form of curing), such method just that the VRP platform adopts.
VRP software is that in the deficiency aspect the visual effect light source of the render engine commonly used during it is curing and material system do not support the simulation to light diffuse reflection phenomenon, its later stage manufacturing technology is not enough to remedy this shortcoming again, the several obvious defects that so just caused its virtual scene: 1, nature light and shade variation and shadow variation abundant, soft, lively exquisiteness is reduced to highlights and the dark two large divisions of portion cursorily, virtual scene so become thin (even increase many light sources artificially, also can not change this situation effectively); 2, the smooth and coarse, hard and soft of object is to express by its reflecting effect to surrounding environment to a great extent, there is not the diffuse reflection of light, just there is not object to the true reflection of surrounding environment, thereby just the exquisiteness of object texture is not expressed yet, it is false that therefore virtual scene becomes, this defective is especially obvious when the silvery white metal of performance and glass; 3, the mutual influence of color between the object also realizes there is not diffuse reflection by light diffuse reflection phenomenon, and the inherent color contact of scene has just been isolated, and therefore virtual scene becomes messy.In the VRP12.0 version of " in look allusion quotation numeral scientific ﹠ technical corporation " up-to-date release, although increased the Material Editor of a special-purpose material of cover and a special use, owing to still do not making a breakthrough aspect illumination and the reflection, above defective still exists.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, the treatment process in the virtual reality technology is improved, proposed the rendering intent of the virtual reality of a new mental ray.
The rendering intent of the virtual reality of playing up based on mental ray: described rendering intent comprises to be made and post-processed early stage, and it is characterized in that: make and comprise the steps: described early stage
A, employing mental ray renderer are played up the object model,
B, for the object model in the scene arranges material, adopt Arch﹠amp in the mental ray render engine; Design material, Autodesk material and building material,
In photometry oriented lamp, free lamp and day photosystem scape on the scene in C, the employing mental ray render engine lighting source is set,
Parameter is played up in D, setting, and calls mr photoexposure control system scene lighting is accurately controlled, and scene effect is played up in test;
E, arrange and to cure parameter, and cure, and generate object model through curing, and the corresponding pinup picture that cures;
Described post-production may further comprise the steps:
F, according to actual requirement of playing up, the reflective-mode of base attribute and the material of material is set,
G, virtual reality are selected and are loaded and make the pinup picture of producing that cures early stage according to the parameter that arranges in the F step, form the scene rendering model of finishing.
The present invention has the following advantages: the present invention improves the baking method of early stage in the manufacturing process of virtual reality technology, by using material or Autodesk material and the building material in the mental ray render engine, and the photometry oriented lamp in the employing mental ray render engine, in free lamp and day photosystem scape on the scene lighting source is set, effectively improved the simulation of virtual reality technology in light diffuse reflection phenomenon, the texture of metal and the volume sense of glass in the virtual reality technology have been improved, improved the exquisiteness sense of virtual reality technology to the expression of object, make the more true of virtual reality technology performance, improve user's feeling of immersion, adopt rendering intent of the present invention that the work of truly playing up in the scene is all finished in making early stage simultaneously, just call in the post production process and make the pinup picture of producing that cures early stage, can effectively shorten the time of the post-production of virtual reality technology, can fast the scene with true effect be presented in the user at the moment, shorten user's stand-by period.
Embodiment
The rendering intent of the virtual reality of playing up based on mental ray: described rendering intent comprises to be made and post-processed early stage, and it is characterized in that: make and comprise the steps: described early stage
A, employing mental ray renderer are played up the object model,
B, for the object model in the scene arranges material, adopt Arch﹠amp in the mental ray render engine; Design material, Autodesk material and building material, adopting above-mentioned material can be to cure to attach to prepare reflection scope body to the reflection of surrounding environment;
In photometry oriented lamp, free lamp and day photosystem scape on the scene in C, the employing mental ray render engine lighting source is set, step C and step B are used in combination, realized that the global illumination in the process of curing is bright, namely comprised the complete illumination of direct illumination and diffuse illumination simultaneously;
Parameter is played up in D, setting, and calls mr photoexposure control system scene lighting is accurately controlled, and scene effect is played up in test; Adopt mr photoexposure control system to realize the science of scene lighting is simulated,
E, arrange and to cure parameter, and cure, and generate object model through curing, and the corresponding pinup picture that cures; Cure and also be RenderToTextures, it is CG animation industry a kind of pinup picture technology commonly used, briefly be exactly a kind of pinup picture that illumination information in the 3dsmax scene and color information are played up three-dimensional model, the pinup picture after then this being cured pastes the technology of going in the scene of getting back to again.This technology is calculated time-consuming luminous energy transmission and has been advanceed to the pre-making stage, in the workload that alleviates CPU greatly in service of virtual reality, recreation and Simulation of Building Roam animation, has ensured the fluency of operational process.
Described post-production may further comprise the steps:
F, according to actual requirement of playing up, the reflective-mode of base attribute and the material of material is set,
G, virtual reality are selected and are loaded and make the pinup picture of producing that cures early stage according to the parameter that arranges in the F step, form the scene rendering model of finishing.
The present invention has the following advantages: the present invention improves the baking method of early stage in the manufacturing process of virtual reality technology, by using material or Autodesk material and the building material in the mental ray render engine, and the photometry oriented lamp in the employing mental ray render engine, in free lamp and day photosystem scape on the scene lighting source is set, effectively improved the simulation of virtual reality technology in light diffuse reflection phenomenon, the texture of metal and the volume sense of glass in the virtual reality technology have been improved, improved the exquisiteness sense of virtual reality technology to the expression of object, make the more true of virtual reality technology performance, improve user's feeling of immersion, adopt rendering intent of the present invention that the work of truly playing up in the scene is all finished in making early stage simultaneously, just call in the post production process and make the pinup picture of producing that cures early stage, can effectively shorten the time of the post-production of virtual reality technology, can fast the scene with true effect be presented in the user at the moment, shorten user's stand-by period.
Claims (1)
1. the rendering intent of the virtual reality of playing up based on mental ray: described rendering intent comprises to be made and post-processed early stage, and it is characterized in that: make and comprise the steps: described early stage
A, employing mental ray renderer are played up the object model,
B, for the object model in the scene arranges material, adopt Arch﹠amp in the mental ray render engine; Design material, Autodesk material and building material,
In photometry oriented lamp, free lamp and day photosystem scape on the scene in C, the employing mental ray render engine lighting source is set,
Parameter is played up in D, setting, and calls mr photoexposure control system scene lighting is accurately controlled, and scene effect is played up in test;
E, arrange and to cure parameter, and cure, and generate object model through curing, and the corresponding pinup picture that cures;
Described post-production may further comprise the steps:
F, according to actual requirement of playing up, the reflective-mode of base attribute and the material of material is set,
G, virtual reality are selected and are loaded and make the pinup picture of producing that cures early stage according to the parameter that arranges in the F step, form the scene rendering model of finishing.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106056658A (en) * | 2016-05-23 | 2016-10-26 | 珠海金山网络游戏科技有限公司 | Virtual object rendering method and virtual object rendering device |
| CN107016718A (en) * | 2017-02-20 | 2017-08-04 | 北京奇艺世纪科技有限公司 | A kind of scene rendering method and apparatus |
| CN108537874A (en) * | 2017-03-01 | 2018-09-14 | 黎志毅 | The method that three-dimensional light data is automatically switched to UE4 |
| CN109102560A (en) * | 2018-08-09 | 2018-12-28 | 腾讯科技（深圳）有限公司 | Threedimensional model rendering method and device |
| CN111445567A (en) * | 2020-04-08 | 2020-07-24 | 广州工程技术职业学院 | Baking method and device for dynamic object, computer equipment and storage medium |
| CN113808246A (en) * | 2021-09-13 | 2021-12-17 | 深圳须弥云图空间科技有限公司 | Method and device for generating map, computer equipment and computer readable storage medium |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106056658A (en) * | 2016-05-23 | 2016-10-26 | 珠海金山网络游戏科技有限公司 | Virtual object rendering method and virtual object rendering device |
| CN106056658B (en) * | 2016-05-23 | 2019-01-25 | 珠海金山网络游戏科技有限公司 | A kind of virtual objects rendering method and device |
| CN107016718A (en) * | 2017-02-20 | 2017-08-04 | 北京奇艺世纪科技有限公司 | A kind of scene rendering method and apparatus |
| CN107016718B (en) * | 2017-02-20 | 2020-06-19 | 北京奇艺世纪科技有限公司 | Scene rendering method and device |
| CN108537874A (en) * | 2017-03-01 | 2018-09-14 | 黎志毅 | The method that three-dimensional light data is automatically switched to UE4 |
| CN109102560A (en) * | 2018-08-09 | 2018-12-28 | 腾讯科技（深圳）有限公司 | Threedimensional model rendering method and device |
| CN109102560B (en) * | 2018-08-09 | 2023-03-28 | 腾讯科技（深圳）有限公司 | Three-dimensional model rendering method and device |
| CN111445567A (en) * | 2020-04-08 | 2020-07-24 | 广州工程技术职业学院 | Baking method and device for dynamic object, computer equipment and storage medium |
| CN111445567B (en) * | 2020-04-08 | 2023-04-14 | 广州工程技术职业学院 | Baking method and device for dynamic object, computer equipment and storage medium |
| CN113808246A (en) * | 2021-09-13 | 2021-12-17 | 深圳须弥云图空间科技有限公司 | Method and device for generating map, computer equipment and computer readable storage medium |
| CN113808246B (en) * | 2021-09-13 | 2024-05-10 | 深圳须弥云图空间科技有限公司 | Method and device for generating map, computer equipment and computer readable storage medium |
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