CN102254344A - Method for dynamically visualizing interactive virtual plants - Google Patents
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- 230000002452 interceptive effect Effects 0.000 title claims abstract description 13
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Abstract
一种交互式虚拟植物动态可视化方法，包括以下步骤：(1)实验记录植物拓扑结构、几何形态；(2)拓扑结构的提取、器官形态库的建立：植物拓扑结构的参数化L系统描述；(3)参数化L系统的改进：改进的参数化L系统是在代表枝、茎、叶、果、花等植物器官的字符中，加入年龄参数，并在枝、茎、叶器官参数中加入表现外力作用的偏转角参数，使用角度的变化来表现植物在外界作用下形态变化；(4)通过用户输入的静态环境因素，根据预先的条件判定函数，计算出植物模型的形态参数；(5)动态可视化虚拟植物模型。本发明能有效提升动态交互性、具有良好实用性。
An interactive virtual plant dynamic visualization method, comprising the following steps: (1) experimentally recording plant topological structure and geometric form; (2) extraction of topological structure and establishment of organ shape library: parametric L system description of plant topological structure; (3) Improvement of the parameterized L system: The improved parameterized L system is to add age parameters to the characters representing plant organs such as branches, stems, leaves, fruits, flowers, etc., and to add The deflection angle parameter that expresses the effect of external force, using the change of angle to express the morphological change of the plant under the external influence; (4) calculate the morphological parameters of the plant model according to the static environmental factors input by the user and according to the pre-conditional judgment function; (5) ) dynamically visualizes the virtual plant model. The invention can effectively improve dynamic interactivity and has good practicability.
Description
Technical field
The present invention relates to computer graphics techniques, especially a kind of computer graphics techniques is applied to the sense of reality analogy method of plant in natural scene.
Background technology
The growth of plant be unable to do without external environment.Temperature, illumination, moisture, nutrition etc. not only have influence on output, the quality of plant, also have influence on the form of plant.Plant growth under the different growing environments has different architectural features.The hydrotropism of root, day long influence to photosensitive plant florescence etc. illustrate that external environment has guidance quality to plant.In the research in recent years, begun physiological ecological model and visual plant model based on the mechanism process are combined.Use the former emulated ecological environment and cultivation step to the biomass of plant, the influence of organ formation and development; Use the microclimate condition of morphosis, the canopy of Visualization Model simulating plant, to obtaining of resource etc.Model after the two combination is combined closely environmental baseline, phytomorph structure and physiological and ecological process with parallel mechanism, and the feedback capability that makes model have structure and function more meets the plant growth mechanism.Though this class model combines plant and environment, aspect visual, also mainly be the growthform variation of plant, seldom there is the Real-time and Dynamic that adds external environment factor and plant mutual.
Summary of the invention
In order to overcome the deficiency that dynamic interaction is poor, practicality is relatively poor of existing virtual plant and factor of natural environment, the invention provides a kind of effective lifting dynamic interaction, have the interactive virtual plant dynamic and visual method of good practicality.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of interactive virtual plant dynamic and visual method, described method for visualizing may further comprise the steps:
(1) experimental record plant topological structure, geometric shape, described topological structure recorded content comprises kind, quantity, position and the structural relation each other of the organ that each growth phase can grow, described geometric shape recorded content comprises the profile of organ and color, size, angle, sets the record cycle of plant topological structure;
The foundation in (2) extraction of topological structure, organ morphology storehouse: the plant topological structure of record is described with parameterized Lindenmayer system, preserve the plant organ geometric shape of record by the graphics technology that uses a computer in the geometric shape storehouse with three-dimensional visualization form in the computing machine;
(3) improvement of parametrization Lindenmayer system: improved parametrization Lindenmayer system be represent branch, stem, leaf, really, in the character of flowering plant organ, add the age parameter, and in branch, stem, foliage organ parameter, adding the deflection angle parameter that shows the external force effect, the variation of use angle shows plant metamorphosis under external influence;
(4) by the static environment factor of user's input,, calculate the morphological parameters of plant model according to condition criterion function in advance;
(5) dynamic and visual virtual plant model: model is by constantly changing the iteration of improving parametrization Lindenmayer system character string and the age parameter of each organ, and carries out patterned explanation, thereby realizes the dynamic and visual of virtual plant.
Further, described method for visualizing is further comprising the steps of:
(6) virtual plant is under the influence of real time environment factor, and the virtual plant model is by changing the external force deflection angle parameter in the improved parametrization Lindenmayer system, thereby makes the visual form generation of virtual plant real-time change.
Further again, in the described step (6), plant stem and branch are divided into some rigidity internodes, and an end is made as stiff end, one end is made as free end, by the computing formula of elastic rod deflection angle, calculates the deflection angle parameter of each refresh time external force effect in branch, stem, the foliage organ parameter.
Further, in the described step (6), to leaving the equilibrium position after the branch stem generation deformation, be not subjected to free end points that external force does the time spent as the equilibrium position internode, under the effect of damping force, amplitude reduces gradually, finally gets back to the equilibrium position when not being subjected to external force.
Described method for visualizing is further comprising the steps of: the output of (7) virtual plant morphological parameters: virtual plant stops deformation in predetermined period, and exports the morphological parameters of the virtual plant under this state.
Described method for visualizing is further comprising the steps of: (8) user is according to the morphological parameters of system output, by compare to determine with truth under the difference of phytomorph, obtain the guidance of agricultural experts by man-machine interaction about cultivation step.
Technical conceive of the present invention is: the raising of, hardware performance soft along with computing machine, and the development of computer graphics, Flame Image Process, virtual reality technology, people require also to improve day by day to the authenticity of virtual plant.Independent plant strain growth metamorphosis can not satisfy the demand of scene drawing, based on virtual plant, sets up the interaction models of plant and envirment factor, makes that the growth of virtual plant is more true to nature, is only the development trend of new agricultural technology.Simultaneously, by utilizing computer technology that real plants information and virtual plant form are compared, and obtain the guidance of agricultural experts' experimental knowledge by man-machine interaction, and instruct the scientific and reasonable cultivated plant of plant culture person, can be with the maximization of economic benefit of cultivated plant.
The application of elastic rod principle is that plant stem and branch are divided into some rigidity internodes, and an end is made as stiff end, one end is made as free end, by the computing formula of elastic rod deflection angle, calculates the deflection angle parameter of each refresh time external force effect in the organ parameters such as branch, stem, leaf;
The application of the principle of damped vibration is to leaving the equilibrium position after the branch stem generation deformation, is not subjected to free end points that external force does the time spent as the equilibrium position internode, and under the effect of damping force, amplitude reduces gradually, finally gets back to the equilibrium position when not being subjected to external force.
Beneficial effect of the present invention mainly shows: the metamorphosis of the plant that the appliance computer graphics simulates in physical environment, can be applicable to virtual plant microcomputer modelling and visual simulating, virtual scene generates, video display stunt and advertising creative are made, three-dimensional animation production and the research of plant growth rhythm.The output of the final form of virtual plant model can be instructed the scientific and reasonable cultivated plant of plant culture person.
Description of drawings
Fig. 1 is the process flow diagram of interactive virtual plant dynamic and visual method.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
With reference to Fig. 1, a kind of interactive virtual plant dynamic and visual method may further comprise the steps:
(1) topological structure of experimental record plant, geometric shape.To plant record of topological structure and geometric shape under varying environment is modeling virtual plant model based, topological structure recorded content such as phyllotaxy, inflorescence, the kind of organ, quantity, position and structural relation each other etc., to organ geometric shape recorded content with the profile of organ and color, size, angle etc.The record cycle of plant topological structure is 7 days 1 time.
The foundation in (2) extraction of topological structure, organ morphology storehouse.The parametrization Lindenmayer system is a kind of form generation model commonly used in the virtual plant modeling.The plant topological structure of record is described with parameterized Lindenmayer system, and deposits in the calculator memory.Preserve the plant organ geometric shape of record by the graphics technology that uses a computer in the organ morphology storehouse with three-dimensional visualization form in the computing machine.
(3) improvement of parametrization Lindenmayer system.Improved parametrization Lindenmayer system be represent branch, stem, leaf, really, in the character of plant organ such as flower, add the age parameter, and in branch, stem, foliage organ parameter, adding the deflection angle parameter that shows the external force effect, the variation of use angle shows plant metamorphosis under external influence
When plant is not subjected to environmental factor or man's activity, outer force parameter is set to 0, and the morphosis that does not influence in the growing process changes;
When plant is subjected to environmental factor or man's activity, outer force parameter changes according to the elastic rod principle in the mechanics of materials, cause the variation of deflection angle, thereby influence the metamorphosis of plant, and after external force disappears, the restoration path when calculating plant recovery to stressing conditions not according to the damped vibration principle;
(4) the static environment factor is to the simulation of plant growth effect.By the static environment factor of user input, as accumulated temperature, soil constituent factor, system calculate the morphological parameters of plant model, as blade amt, the blade total area, plant height etc. according in advance condition criterion function.
(5) dynamic and visual virtual plant model.Model is by constantly changing the iteration of improving parametrization Lindenmayer system character string and the age parameter of each organ, and carries out patterned explanation, thereby realizes the dynamic and visual of virtual plant.
(6) the real time environment factor is to the influence of virtual plant.Virtual plant is at real time environment factor such as wind, various natural factors such as rain, perhaps under the influence of human factor such as artificial collision, the virtual plant model is by changing the outer force parameter in the improved parametrization Lindenmayer system, thereby makes the virtual plant model that real-time metamorphosis take place.
(7) output of virtual plant morphological parameters.Virtual plant stops deformation in predetermined period, and exports the morphological parameters of the virtual plant under this state, as plant height, and the blade total area, fruit number etc.
(8) cultivation suggestion.The user is according to the morphological parameters of output, compare to determine with truth under the difference of form of plant, obtain the instruction of agricultural experts by man-machine interaction about cultivation step.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102637218A (en) * | 2012-02-24 | 2012-08-15 | 浙江工业大学 | Computer simulation method for plant and raindrop real-time interaction process |
| CN102938162A (en) * | 2012-10-18 | 2013-02-20 | 深圳先进技术研究院 | Plant model establishing device and method based on sample |
| CN103021012A (en) * | 2012-12-31 | 2013-04-03 | 中国科学院自动化研究所 | Method for combining static structure and utilizing computer to draw dynamic 3D (three-dimension) plant |
| CN104504752A (en) * | 2015-01-06 | 2015-04-08 | 中国农业大学 | Visual simulation method for virtual growth of jujube trees |
| CN104965997A (en) * | 2015-06-05 | 2015-10-07 | 浙江工业大学 | Crop virtual breeding method based on plant function and structure model |
| CN105160629A (en) * | 2015-09-22 | 2015-12-16 | 上海斐讯数据通信技术有限公司 | Method of forecasting flower color and system |
| CN106406912A (en) * | 2016-10-27 | 2017-02-15 | 赵长江 | Virtual reality-based simulation game system and implementation method |
| CN106651621A (en) * | 2017-01-06 | 2017-05-10 | 广东小天才科技有限公司 | Virtual planting method and device for plants |
| CN107256454A (en) * | 2017-05-31 | 2017-10-17 | 安徽农业大学 | A kind of plant three-dimensional shape sample method by growth elements affect |
| CN107533580A (en) * | 2015-04-16 | 2018-01-02 | 索尼公司 | The multiple parameters for the biological information that part as live plant is shown over the display |
| CN109410343A (en) * | 2018-09-30 | 2019-03-01 | 申旭 | A kind of BIOLOGICAL TEST METHODS and system based on virtual reality |
| CN111435260A (en) * | 2019-01-14 | 2020-07-21 | 胡欣然 | Plant growth environment parameter monitoring and environment simulation system |
| CN112632752A (en) * | 2020-12-02 | 2021-04-09 | 中国科学院空天信息创新研究院 | Method and system for continuously and automatically simulating vegetation growth state |
| US20220358265A1 (en) * | 2021-05-04 | 2022-11-10 | X Development Llc | Realistic plant growth modeling |
| CN117173367A (en) * | 2023-08-09 | 2023-12-05 | 中国建筑西南设计研究院有限公司 | Method and equipment for establishing dynamic landscape plant component library based on Rhino |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102637218A (en) * | 2012-02-24 | 2012-08-15 | 浙江工业大学 | Computer simulation method for plant and raindrop real-time interaction process |
| CN102938162A (en) * | 2012-10-18 | 2013-02-20 | 深圳先进技术研究院 | Plant model establishing device and method based on sample |
| CN103021012A (en) * | 2012-12-31 | 2013-04-03 | 中国科学院自动化研究所 | Method for combining static structure and utilizing computer to draw dynamic 3D (three-dimension) plant |
| CN104504752A (en) * | 2015-01-06 | 2015-04-08 | 中国农业大学 | Visual simulation method for virtual growth of jujube trees |
| CN107533580A (en) * | 2015-04-16 | 2018-01-02 | 索尼公司 | The multiple parameters for the biological information that part as live plant is shown over the display |
| CN104965997A (en) * | 2015-06-05 | 2015-10-07 | 浙江工业大学 | Crop virtual breeding method based on plant function and structure model |
| CN104965997B (en) * | 2015-06-05 | 2017-12-29 | 浙江工业大学 | A kind of virtual breeding method of crop based on plant function and structural model |
| CN105160629B (en) * | 2015-09-22 | 2018-09-28 | 上海斐讯数据通信技术有限公司 | Predict the method and system of flower color |
| CN105160629A (en) * | 2015-09-22 | 2015-12-16 | 上海斐讯数据通信技术有限公司 | Method of forecasting flower color and system |
| CN106406912A (en) * | 2016-10-27 | 2017-02-15 | 赵长江 | Virtual reality-based simulation game system and implementation method |
| CN106651621A (en) * | 2017-01-06 | 2017-05-10 | 广东小天才科技有限公司 | Virtual planting method and device for plants |
| CN107256454A (en) * | 2017-05-31 | 2017-10-17 | 安徽农业大学 | A kind of plant three-dimensional shape sample method by growth elements affect |
| CN109410343A (en) * | 2018-09-30 | 2019-03-01 | 申旭 | A kind of BIOLOGICAL TEST METHODS and system based on virtual reality |
| CN111435260A (en) * | 2019-01-14 | 2020-07-21 | 胡欣然 | Plant growth environment parameter monitoring and environment simulation system |
| CN112632752A (en) * | 2020-12-02 | 2021-04-09 | 中国科学院空天信息创新研究院 | Method and system for continuously and automatically simulating vegetation growth state |
| CN112632752B (en) * | 2020-12-02 | 2024-02-09 | 中国科学院空天信息创新研究院 | Method and system for continuously and automatically simulating vegetation growth state |
| US20220358265A1 (en) * | 2021-05-04 | 2022-11-10 | X Development Llc | Realistic plant growth modeling |
| CN117173367A (en) * | 2023-08-09 | 2023-12-05 | 中国建筑西南设计研究院有限公司 | Method and equipment for establishing dynamic landscape plant component library based on Rhino |
| CN117173367B (en) * | 2023-08-09 | 2024-06-04 | 中国建筑西南设计研究院有限公司 | Method and equipment for establishing dynamic landscape plant component library based on Rhino |
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Application publication date: 20111123 |