نتایج جستجو برای: irregular terrain
تعداد نتایج: 48573 فیلتر نتایج به سال:
We investigated the origin of unusual pitted terrain on asteroid Vesta, revealed in images from the Dawn spacecraft. Pitted terrain is characterized by irregular rimless depressions found in and around several impact craters, with a distinct morphology not observed on other airless bodies. Similar terrain is associated with numerous martian craters, where pits are thought to form through degass...
This paper uses methods of terrain representation, creation and realism described in literature. In particular a combination of terrain synthesis using Fractional Brownian Motion, and erosion procedures is examined, as well as the procedural formation of rivers via squig curves. Other techniques are examined, such as Triangulated Irregular Networks and ridges generation are discarded in terms o...
Terrain modeling has been an important area of computer graphics and GIS for more than 20 years and despite this long history many problems still prevail. One of the important challenges is an interactive physics-based authoring and editing of large scale terrains. Most of published work use a regular grid to represent a terrain elevation data. Due to the simplicity of this representation, visu...
Although walking machines exhibit many advantages over wheeled or tracked vehicles, legged vehicles have yet to be introduced in real applications because of the primitive development of specific techniques such as gait generation. This article addresses the design, implementation and experimentation of gaits to negotiate uneven terrain with a real machine. The gaits presented are a mixture of ...
The following paper proposes an alternative approach to the real-time adaptive triangulation problem. A new region-based multiresolution approach for terrain rendering is described which improves on-the-fly the distribution of the density of triangles inside the tile after selecting appropriate Level-Of-Detail by an adaptive sampling. This proposed approach organizes the heightmap into a QuadTr...
Running over uneven ground requires visually regulating step length to secure proper footing. To examine how this is achieved, we studied subjects running on a treadmill on a series of irregularly spaced targets. The movements of their lower limbs and coccyx relative to the targets were monitored opto-electronically by a Selspot system. The results indicated that step length was adjusted to str...
This paper presents an on-line technique for constructing walking gaits for legged robots on irregular terrain. The approach involves designating sequences of closed-loop control laws derived from a control basis. A control basis is a set of artiicial potential functions that are device and task independent. A variety of walking contexts can be achieved by varying the sequence of controllers dr...
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