| Wernecke, John. The Inventor Mentor. Reading, Mass. Addison-Wesley, 1994. 60 |
....of the texture determined directly by the stroke. Camera Placement: Camera control is a fundamental problem for 3D graphics applications. Several techniques on user interfaces for camera control have been proposed, including orbiting techniques mapping 2D motion into 3D interaction [CMS88, PBG92, Wer94, ZF99] use of image plane constraints [GW92, PFC 97] and direct camera manipulation using a 6DOF input device [WO90] Our approach differs from many of the existing techniques that use 2D input devices to directly manipulate the viewpoint. Our main focus in ArtNova is to achieve automatic ....
Josie Wernecke. The Inventor Mentor. Addison-Wesley, 1994.
....solvent accessible surface and the Lee Richards solvent contact surface of a molecule. In our approach we combine the use of efficient data structures [20] that have already been shown useful for molecular modeling [26] with the use of standard graphics libraries such as OpenGL and OpenInventor [47]. The basic idea is to dynamically maintain the primary structures and exactly compute and update representations (tensor product rational B splines, trimmed NURBS) of the molecular surface which are directly displayed by optimized trimmed NURBS rendering functions of OpenGL. In particular we ....
J. Wernecke. The Inventor Mentor. Addison--Wesley, 1994.
....as well as haptic modeling and 3D painting. 2 Related Work Camera control is a fundamental problem for 3D graphics applications. Several techniques on user interfaces for camera control have been proposed, including orbiting techniques mapping 2D motion into 3D interaction [CMS88, PBG92, Wer94, ZF99] use of image plane constraints [GW92, PFC 97b] and direct camera manipulation using a 6DOF input device [WO90] Our approach differs from many of the existing techniques on using 2D input devices to directly manipulate the viewpoint. It shares some similarity with [MCR90] on moving ....
Josie Wernecke. The Inventor Mentor. Addison-Wesley, 1994.
....for parallel scene graph traversals. E#cient view frustum culling. All these specific optimization approaches are well hidden from the application programmer. He normally does not need to concern himself with the details of either of these mechanisms. 2.1. 2 OpenInventor OpenInventor[68, 83, 84] is a 3D graphics toolkit with a strong focus on interaction support and extensibility. It s scene graph structure and file format was chosen as the basis for the VRML1.0[6] standard, the predecessor of the VRML97 and X3D standards. OpenInventor is an object oriented toolkit aimed at developers ....
Wernecke, J. The Inventor Mentor. Addison-Wesley, 1994.
....to the PGO editor. Finally, the application of Open Inventor and the PGO editor is compared with the construction and the use of an example interface. 6.2. 1 Open Inventor Architecture Inventor is a library of objects and methods for the creation of interactive 3D graphics applications [SC92, Wer94] The first release of Inventor was called IRIS Inventor which was based on the IRIS GL graphics programming library. Its successor is called Open Inventor and is built on top of OpenGL. In this chapter, the word Inventor is used as synonym for Open Inventor. The architecture of Inventor is ....
J. Wernecke. The Inventor Mentor. Addison-Wesley, Reading, Mass., 1994.
....is not su#cient for the representation of a problem then the directed graph can be replaced with a general graph with some loss in e#ciency. A Scene graph appears to be a suitable representation of the physical simulation of the vocal tract, even if its not very common. For this project, Inventor [24] is chosen as a scene graph library mainly since it is well established in the graphics community . Our system architecture needs to be designed to support a variety of cross compatible modeling techniques and several modeling representations. During the design process we decided that a geometric ....
....intermediate layer. Each of this nodes are represented by muscles, tissues, bones, and ligaments in the bottom layer. Attributes and methods of each structure are defined on a suitable level in order work su#ciently. The core simulation engine is built on a high level graphics library Inventor [24], which supports scene graph structures for graphics and animations. Created from data and analytic methods are nodes for specifying graphical models, including shapes, cameras, lights, properties, transformation, engines, selection, view, and so forth. Inventor allows the extension of its class ....
J. Wernecke. Inventor Mentor. Addison-Wesley, 1994.
....follow some basic criteria: The model must be accurate . The model must be easily interpreted . The model must be compatible with VR display systems . Each model should have various levels of detail The most common representation of a VR model is by the use of a scene graph technique [11]. Contrary to a pure geometrical representation where no optimization is possible, a scene graph can be optimized to hide various latencies of the display and communication system. This is because a scene graph is a structured representation of the various relationships between elements of a ....
Wernecke, J., "The Inventor Mentor", AddisonWesley Publishing Company, ISBN 0-201-624959, 1994.
....desktop might not mean lack of access to more powerful hardware elsewhere. A separate workspace process, which can be hosted on some cycle server, minimizes the penalty paid. If one has access to a graphics workstation, then a higher performance user interface currently based on Open Inventor [12] would be available, and there would be the option of running the workspace on the same workstation or another machine. Current LOGOS development is performed on Silicon Graphics workstations. There is one additional way that some users might want to access the system. Instead of using the ....
J. Wernecke. The Inventor Mentor. Addison-Wesley, Reading, MA, 1994.
....can now work with the surface in any algorithm which only assumes a parameterization. For example, the surface can be rendered by evaluating it on a suitably dense set of points and displaying the resulting piecewise linear approximation, just as is done in standard NURBS display libraries (e.g. [30]) Instead of taking this point of view we treat the surface as the limit of repeated knot insertion, or subdivision. Figure 3 shows the Loop knot insertion stencils. The coefficient # depends on the valence of the central point and can be taken to be # =3 8k for k 3 and # =3 16 for k =3(this set ....
....some profile function. For each feature curve the user may choose a scale space V l in which the feature should first appear. The curve is drawn onto an adaptive tessellation of the surface corresponding to the chosen subdivision level, using direct manipulation in 3D of a standard dragger tool [30]. The curve is represented as a quadratic spline control polygon. Its edges have to be inside triangles of the control mesh at level l.Ifanysegments intersects an edge of a level l control triangle, the segment is split (see Figure 5) Figure 5: The user draws directly onto the surface at a ....
WERNECKE,J.The Inventor Mentor. Addison-Wesley, 1994.
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Wernecke, John. The Inventor Mentor. Reading, Mass. Addison-Wesley, 1994. 60
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J. Wernecke. The Inventor Mentor. Addison-Wesley, 1994.
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Wernecke, J., The Inventor Mentor. Addison-Wesley, 1994.
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Josie Wernecke, The Inventor Mentor, Addison Wesley, 1994.
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Josie Wernecke. The Inventor Mentor. Addison-Wesley, 1994.
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Wernecke, J., The Inventor Mentor, Addison-Wesley, 1994.
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Josie Wernecke. The Inventor Mentor. Addison-Wesley Publishing Company, 1994.
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Josie Wernecke. The Inventor Mentor. Addison-Wesley Publishing Company, 1994.
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J. Wernecke. The Inventor Mentor. Addison-Wesley, 1994.
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Josie Wernecke. The Inventor Mentor. Addison-Wesley, Reading, Massachusetts, U.S.A., September 1999.
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Josie Wernecke. The Inventor Mentor. Addison-Wesley, Reading, MA, 1998. 2
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J. Wernecke, The Inventor Mentor. Addison-Wesley, Reading, Massachusetts, 1994.
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Josie Wernecke. The Inventor Mentor. Reading, MA, Addison-Wesley Publishing Company. 1994.
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Wernecke, J.: The Inventor Mentor, Addison-Wesley Publishing Co. (1994)
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Wernecke J: The Inventor Mentor, Addison-Wesley, 1994
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Wernecke, J., "The Inventor Mentor", Addison-Wesley Publishing Company, ISBN 0-201-62495-9, 1994.
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