Application of dynamic perspective in highway design?

The application of dynamic perspective in highway design is very important. Knowing every detail is the key to better implement the link and achieve the expected effect. Zhong Da Consulting will explain the application of dynamic perspective in highway design.

1, overview

With the improvement of road grade, people pay more and more attention to the coordination between the aesthetic requirements of road alignment and the surrounding landscape. From the past two-dimensional drawings to the present three-dimensional model space analysis, computer-aided design will occupy an increasingly important position in the process of road landscape design. Applying the latest computer technology to the design work will help to reflect the design content more intuitively, improve the coordination between the design and the surrounding environment, and greatly improve the design efficiency.

Road perspective is an important part of the design of route computer-aided design system, which enables designers to obtain a vivid panoramic view of the road in the design stage, check the linear quality of route design and the harmony between the road and the surrounding environment, and take this as the basis for modifying the design. Using the advanced computer-aided software system to establish the dynamic perspective technology of highway three-dimensional model can check and evaluate the highway design scheme more conveniently and quickly, and using the dynamic perspective real-time roaming system can let drivers feel the comfort and safety of driving on the highway in advance. Dynamic perspective technology has broad application prospects in highway landscape design. By using this technology, the highway landscape along the highway can be truly reflected before the expressway is completed, and the comfort and safety of driving can be intuitively displayed. It also has reference function for highway design, traffic planning and marking design, and provides basis for leadership decision-making and engineering practice.

2. The main content of dynamic perspective system.

In the field investigation, the original data are mainly collected and processed from the comprehensive application of high and new technologies such as aerial survey, remote sensing and UYS. In interior design, it mainly includes the establishment of three-dimensional digital ground model, the integration technology of highway CAI and the three-dimensional visualization technology of roads, and integrates the above technologies to realize the integration of survey and design. The interior design stage mainly includes the establishment of 3D digital ground model, highway CAD integration technology and highway 3D visualization technology. And integrate the above technologies to realize the integration of survey and design.

The main workflow of dynamic three-dimensional perspective includes the collection and arrangement of original data, field investigation and field picture collection, computer-aided system software to establish three-dimensional model, rendering and final synthesis.

2. 1 collection of original data and establishment of digital terrain model

The original data mainly include highway design data, terrain data and landscape data along the line. Collecting and processing real and accurate raw data is the basis of making dynamic perspective view in line with the actual situation. To check the perspective of highway alignment, we must first establish a three-dimensional model of designed highway, which can be divided into two categories: one is simply designed highway model; The second is the design highway model with terrain. The establishment of the first model: directly enter the computer digital model management, create a new digital model number, and then read the data of the designed highway from the cross-sectional database and the vertical database to build the network and model; The establishment of the second model: On the basis of the first model, the topographic points in the topographic map database are read into the digital model, and the Russian topographic points within the highway boundary are eliminated. Then, you should use all the points in the network to build the model.

2.2 The general principle of dynamic perspective and the computer software used in the production process.

The modeling of the road itself can be completed by using secondary development software such as Di Wei 5.6 under AutoCAl software. The digital-analog triangulation constructed above can also output N format, and this function can be handed over to third-party rendering software such as 3I? Max lightscape provides data model data. In order to build a better model, it is necessary to collect images of ground objects, plants and roads. , so as to establish a more realistic material library. Usually, image editing software such as Photoshop and CORELDRAW can be used to process the collected image data.

The establishment of three-dimensional model is the core of dynamic perspective, and a complete three-dimensional model should include a complete three-dimensional scene, including three-dimensional models of various elements and related supporting material maps. Through related programs, the three-dimensional model of highway can be quickly established under auto-CAD. Using related professional software such as HinCADS.6, Haitian Highway Software and Wuhan Lijie Highway Comprehensive Design Software, the three-dimensional model of the highway can be established. After the integration of horizontal, vertical and horizontal design, Li Jie's plane 3D animation system can automatically generate real 3D models according to templates or vertical and horizontal ground line files and route design information, automatically generate structures such as railings, carriageways and median, set background materials at will, directly convert the models into 3DMAX rendering software for effect processing, and finally generate real 3D renderings and dynamic AVI files, which will soon generate route perspective views and 3D panoramic views, and realize 3D expressways by using advanced virtual reality technology. You can play three-dimensional animation according to the specified path, observe the road design effect from different angles and heights, and check and evaluate the design results. BID-VRS, a highway virtual landscape real-time roaming system developed by China Communications Second Highway Survey and Design Institute, directly receives the orthophoto data generated by the digital photogrammetry system, superimposes the image with the comprehensive model formed by the digital ground model, the three-dimensional geometric model of highway route and interchange, and the three-dimensional geometric model of highway bridge, arranges the scene, and dynamically roams the highway design virtual landscape in real time. The combination of dynamic perspective real image and highway design truly and dynamically reflects the results of highway survey and design, which provides a brand-new visual means and tools for design evaluation and environmental protection.

Hard3D is a set of real-time 3D graphics generation and rendering system developed by Xi Anhaidi Computer Software Development Co., Ltd., which is specially used for highway 3D model making and dynamic playback. It has the advantages of simple use, high production efficiency and clear picture, and the generated animation is operable and can truly and reliably reflect the design intention. In the process of real-time dynamic playback, the system can display all the technical indicators of the road section one by one (including the technical indicators such as filling and excavation area, filling and excavation height, subgrade width, superelevation, geodetic coordinates and so on). ), it is convenient for the audience to grasp the information of each section at any time. In the process of dynamic playback, users can grab wonderful pictures (original bmp files) at any time and save them on the hard disk for making engineering renderings. The system can also record animation continuously, including background music and sounds explained by designers. The system automatically synthesizes audio and video (generates avi files). It has the maneuverability of animation and the dynamic display of various route information. This system can be widely used in the three-dimensional demonstration, rendering production, project evaluation and engineering design bidding process of highway engineering projects to show your strength and provide powerful visual support for the reasonable optimization of the project. Because the 3D graphics engine based on Hard3D provides powerful dynamic modeling, dynamic rendering and model management functions, and benefits from Microsoft's continuous upgrading of DirectX graphics driving performance, Hard3D has reached the absolute leading level in the dynamic rendering of graphics and dynamic testing of models in China, completely getting rid of the traditional practice of rendering first and then playing 3DMAX, and making highway 3D enter a brand-new stage.

2.3 Rendering of 3D model

The 3D model is rendered in 3DS series software 3DS}MAX}VIZ}, and the specific contents include: setting lights, setting cameras, pasting materials, setting backgrounds, and finally rendering into static panoramic perspective.

2.4 Post-processing of Rendered Drawings

Post-processing is very important for making high-quality renderings.

2.5 Animation and video output

In addition to the same requirements as static rendering, you also need to set the camera path and render frame by frame. The rendered picture is played at a certain number of frames per second (which can be determined according to the moving speed of the car) to become a dynamic panoramic perspective. The last step is to edit, synthesize and dub the animation clips through related software, and finally get the finished product.

3. Practical application

Relying on the oil pipeline project from Bulong to Rudong County in Naqu, Xizang Autonomous Region, the dynamic perspective research of the whole pipeline was carried out, and the dynamic three-dimensional perspective of the key section of the whole pipeline and about 10Km was completed. In the preliminary design stage and the construction drawing design stage, the panoramic perspective effect diagram of complex road sections and the dynamic perspective diagram of simulated cars are generated, which plays a guiding role in the comparison of schemes, the quality of sight distance and the appropriateness of vertical and horizontal combination.

Files needed for modeling: cross-section hat file and topographic point data. Other files include: structure file, cross-section file, superelevation file, superelevation map file, geological section file, feature point file, plane line file, plane curve file and cross-section file. Limited by space, the detailed process of making dynamic perspective by using highway design and plane three-dimensional animation system is not introduced here. Now, the general production process is described as follows: (1) establishing digital terrain model; (2) establishing real three-dimensional model of route; (03) generating sign structure, etc. (4) Set colors and materials; (5) Output 3DS files; (6) Form 3D animation.

4. Conclusion

The principle of dynamic perspective provides a brand-new method for vividly displaying three-dimensional virtual reality scenes. It can automatically generate interactive three-dimensional panorama by processing the images obtained from real scenes, so that users can conveniently watch the three-dimensional panorama interactively from multiple angles, and provide a comprehensive solution for virtual reality graphics and visual project recording. The dynamic perspective technology system can be widely used in the three-dimensional demonstration, rendering, project evaluation and engineering design bidding process of highway engineering projects, giving new vitality to the display and record of engineering construction projects.

For more information about project/service/procurement bidding, and to improve the winning rate, please click on the bottom of official website Customer Service for free consultation:/#/? source=bdzd