Research On The Method Of Greenery Landscape Modeling

This text takes some landscape factors such as terrain, plant and water as research objects. Based on the principle of Computer Graphics. The purpose is providing necessary and exact modeling basic for landscape programming, agriculture and forest research and 3D expression. Moreover, it can enrich the technology of Digital Landscape and Digital Agriculture, take them a continuance development.This paper chose to modeling, powerful, the use of a wide range of 3ds max as a three-dimensional expression of the software platform to study the topography, vegetation, water body three-dimensional modeling of the general approach. The terrain modeling discussed the Extrude,method of Terrain,method of grey plan Displace ,method of Patch Grid, method of random creation and method of software creation. The 3D modelling of plant talk over method of cross tree, method of silhouette, method of samdwich crown, Geometric parameter trees,plant model made by cylinders, Composite plant model, programmable three dimensional model of plant and model of software creation, and stresses the use of fractal theory of L-systems approach to modeling plant .This article take the Chinese pine as an example, establishes mathematics equation of the plant growth through the determination to the Chinese pine bough length, the branch length, the winding point, the branching angle and proportionality factor's. Utilizes the L- system theory, uses the VB programming, simulates the three-dimensional model to the single plant, and discussed its application in reality through the model research. The 3D modelling of water debated water surface model,surface corrugation and solid model, and applyied the technique of water color, water transparency,reflection, refraction etc to simulate water's vein, utilized the method of plastering picture and ripple to simulate corrugation effection, used particle system to simulate the effect of water moving to fountain, rain, snow and so on.This article emphatically has carried on the comparative analysis to the various landscapes element's modeling methods, and proposed three landscape elements as well as the landscape synthesis applied research in reality, then draws the following conclusions:1. Terrain modeling can use method of Terrain , grey plan Displace and Patch Grid method in the case of having a precise topographic map data. Terrain which is generated three-dimensional topography of the best, most accurate, most intuitive approach, Patch Grid of times. Grey plan is more difficult to handle in the application so there are some certain gap between the actual terrain and three-dimensional topography by method of grey plan Displace. The terrain does not require precise, just as the King of vision or with the terrain, can be used method of grey plan Displace ,method of Patch Grid, method of random creation . Method of random creation is the most natural effect of the topography, and this method is more simple. The method of grey plan Displace is a little worse. Patch Grid law is not more simple and convient than the two methods ahead in generating the terrain due to manual control the modified of point level. We have to use Patch Grid if there is not terrain data and the terrain contour is requested because it can easily control the requirements of the terrain shape.2.Tree storm generated by the plant model is the best through a comparative analysis to method of cross tree, geometric parameter model, the software directly Generation Model Law (3ds max software and plug-Tree storm), 2D map drawn by plant modelling. Followed by other 2D map drawn, 3ds max, method of cross tree and geometric parameter model. It can be seen the plant produced good results and easier to operate using the Tree storm and 2D map drawn. But Tree storm-generated three-dimensional model is pure, more observation, strong sense of perspective.However, Tree storm's speed will be very slow with the increasing of the trees model.So we can use Tree storm + Cross tree in pure three-dimensional model, close-range trees with Tree storm generated and in the long-term use the cross tree. You can meet a good three-dimensional effects, effectiveness and realistic perspective, but also solved the shortcoming of the slow speed in this way.3.Surface water modeling commonly used to model performance because it easily manipulated and can carry out the deformation, textures and other operations above it though solid model is generally used to drop performance of entities, such as deformation. Utilized the method of plastering picture and ripple to simulate corrugation effection is more simple and better effect of simulated ripple so it has a high utilization rate in the design. The best way to produce the landscape effects of fountains , falls, rain and snow is particle system. Particle systems are generally used to water the dynamic performance effects and 2D textures commonly be used to replace the three-dimensional model method.You can save time and maybe have more sense of reality.4. We can draw the operational methods of landscape through landscape planning and design examples. Three landscape synthesis methods can be used flexibly in accordance with design requirements. You may use three-dimensional model of purely visual synthesis methods in small scenes of landscape planning design and can create animation. When we produce large landscape planning design, it will take up too much time and memory to make pure three-dimensional model while the two-dimensional model will use a lot of perspective, the shadow processing in large scene production so we do not advice to use them. We can use the landscape synthesis methods of three-dimensional model + two-dimensional model and choose the reasonable topography, vegetation, water modeling, then select a suitable view to rendering in the three-dimensional software and graphics software in a post-processing. 5.Three-dimensional model based on the L-system theory of simulated has a realistic and can be used in practice. In addition, the model is the programming with VB and the efficiency and flexibility of VB make it is possible to improve and expand the latter part of the model. The research and practice of L-theory used to construct three-dimensional will be reference to other materials three-dimensional construction.6. The 3ds max software has powerful features, a rich modeling tool, the top rendering and animation capabilities in the application. Topography, vegetation and water landscape elements in 3ds max can be very good in the modeling and rendering, However, in order to establish good 3ds max effect of landscape, it is necessary to use 3ds max plug-in the production environment, plug-in trees, landscape plug-in, etc. In addition, we can also use other image processing software to create visual effects synthesis.There are two innovations in this text. First, based on the modeling method of terrain, plant and water, provided the maneuverable steps of landscape composing. It has important and directive significance to aftertime study and work. Second, this text provided a modeling method based on L-System, simulated plant growth, which with physiological characteristic and configuration.