Visualization for Project Development (2006) / Chapter Skim
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Although effective, hand renderings only provided a limited number of viewpoints for the project. They were also based on artistic interpretation and thus were only approximate in their accuracy.
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could only be created by an experienced CADD operator. Throughout the 1980s, CADD primarily ran on mainframe computers.
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With this mindset, the public expects and demands to see similar visuals at public presentations. This pressure has driven transportation agencies to develop and implement visual tools for public outreach.FIGURE 4 2-D CADD roadway alternative plan.
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Critical issues such as line-of-sight and site impacts can be better understood through the use of visual tools. Because engineers are currently charged with the task of designing 3-D projects, it seems particularly practical to use 3-D tools (see Figure 5)
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Project goals cannot be met unless the staff available has the correct skill set. Types of Visual Tools Hand Rendering Hand rendering is the oldest visual tool used within the transportation design community.
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. Inserting these variables into a rendering program and creating realistic output takes an artistic eye and can be one of the most time10 FIGURE 8 Hand rendering; the oldest visual tool used within the transportation design community.
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The computer systems must generate all the renderings necessary to create an animation, and it takes 30 frames (that is, renderings) to generate 1 s of computer animation (see Figure 13)
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Users of this technology need to be aware that, unlike FIGURE 13 Frame count needed to generate 1 s of computer animation.
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computer animation, real-time simulation cannot render multiple light sources, shadows, or reflectivity. These capabilities are currently available only with computer rendering or animation.
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FIGURE 18 Public outreach website.
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Video Production Video production combines the visual tools of photo-simulation, 3-D digital modeling and animation, and computergenerated graphics to create an informative depiction of a project (see Figure 20)
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