Butterworth, J., "3DM: A Three Dimensional Modeler Using a Head-Mounted Display", Computer Graphics: Proceedings of 1992.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....6. Section 7 discusses the achieved results and defines the orientation for future work. 2. RELATED WORK There have been several research efforts to develop assembly simulator environments and much work has been done allowing users to compose scenes within virtual environments, such as 3DM [Butterworth 92], and JDCAD [Liang 94] which tackled many of the issues involved in the interactive creation of 3D objects. Problems with such systems are the absence of constraints when interacting with virtual objects. Users are restricted to gross interactions and are unable to perform precise object ....

Butterworth, J., Davidson, A., Hench, S., Olano, T., "3DM: A Three-Dimensional Modeler Using a Head-Mounted Display", ACM Computer Graphics (1992.

....a number of advantages. Real time head tracked stereoscopic view improves the understanding of shape and spatial relationships. Spatial direct manipulation improves the accessibility to 3 D objects in a quick and intuitive way. For the last decade, a number of immersive modelers have been developed[3, 4, 5, 6]. However, most of them are only able to construct the shape of virtual objects, not to describe their behavior or geometric constraints. We have developed a new method for imposing geometric constraints on virtual objects within an immersive modeler. This method provides a number of geometric ....

J. Butterworth, A. Davidson, S. Hench and T. M. Olano: "3DM: A Three Dimensional Modeler Using a Head-Mounted Display," Proc. of ACM Simpo. on Interactive 3D Graphics, pp.135-139, 1992.

....has a number of advantages. Real time head tracked stereoscopic view improves the traderstanding of shape and spatial relationships. Direct manipulation improves the accessibility to 3 D objects in a quick and intuitive way. For the last decade, a number of immersive modelers have been developed [3, 4, 5, 6], though most of them are only able to construct the shape of virtual objects, not to describe their behavior or geometric constraints. We focus on geometric constraints among a set of properties of reactive 3 D objects as the first step, since most real objects have geometric constraints on ....

Butterworth, J., Davidson, A., Hench, S. and Olano, T. M., "3DM: A Three Dimensional Modeler Using a Head-Mounted Display," Proc. of ACAI Sympo. on Interactive 3D Graphics, pp.135-139, 1992.

....to go beyond straightforward interpretation of physical device data [27] 2] AT T s embryonic CAD modeler [39] is an example of a system showing the importance of pattern recognition coupled to expressive input devices, through the use of thumb posture classification and voice input. UNC s 3DM [5] is a threedimensional surface modeling application using a head mounted display and a custom made 6D mouse. In both systems, the user interface takes little profit of 3D space, mostly using three dimensional menus and limiting direct manipulation to point dragging and transformation ....

Butterworth J., Davidson A., Hench S., Olano TM (1992), 3DM: A Three Dimensional Modeler Using a Head-Mounted Display. Proc. SIGGRAPH Symposium on Interactive 3D Graphics: 135-138.

....MANIPULATE allows the user to alter object parameters. This is explained further in the next section. 4.4 Immersive Design DataVis doesn t allow general manipulation of all of the parameters. This is because DataVis was designed as a specific visualisation tool and not as a 3D Modeller (3DM [3] and Issac [5] Junction poles can be selected TRANSFORMER JP1 JP3 JP2 JP7 JP6 JP8 JP4 JP5 JP9 JP13 JP10 JP11 JP12 JP14 C1 C2 C3 C4 JP# Junction Pole ID C# Consumer ID Visualization of Transformer Zones using a Distributed Virtual Reality Architecture dvr12030.100.doc Version 1.00 ....

- Butterworth, J. et al.1992 3DM: A ThreeDimensional Modeler Using a Head-Mounted Display, Procedures of the Symposium on Interactive 3D Graphics, ACM Press, New York, pp.134-138.

....objects within a virtual environment has a number of advantages such as a real time stereoscopic view of a 3 D scene and spatial manipulation for 3 D objects. In the last decade, a number of immersive modelers using virtual reality techniques have been developed for rapid prototyping of 3 D objects[1, 2, 3, 4]. However, most of existing immersive modelers are only able to construct the shape of objects. Nowadays, the term 3 D computer graphics design implies not only geometric modeling, but also creating geometric constraints, kinetic constraints, animation, behavior and physical properties. Therefore, ....

Butterworth, J., Davidson, A., Hench, S. and Olano, T. M.: "3DM: A Three Dimensional Modeler Using a Head-Mounted Display," Proc. ACM Interactive 3D Graphics, pp. 135--139, 1992.

....comparing it in usability tests with commercially available 3D modelling packages [112] Liang has not, however, performed formal experimental analysis of the factors which contributed to JDCAD s design. Chapter 2: Related Work 26 2.4. 5 Butterworth s 3DM (Three Dimensional Modeler) Butterworth [26] describes a 3D CAD (Computer Aided Design) system for use in head mounted displays. One hand is used for all interactions, including selecting commands from a floating menu, selecting objects, scaling and rotating objects, or grabbing vertices to distort the surface of an object. Modes for ....

....short distance within tracker range; and grabbing the world to drag and rotate it. Butterworth reports that since the user can become disoriented by all of these methods of movement, there is a command that immediately returns the user to the initial viewpoint in the middle of the modeling space [26]. This is evidence of an underlying usability problem; the command to return the user to the initial viewpoint helps, but the reported user disorientation indicates that the underlying problems of navigation and working at multiple scales still need additional research. 2.5 Two handed spatial ....

Butterworth, J., Davidson, A., Hench, S., Olano, T. M., "3DM: A Three Dimensional Modeler Using a Head-mounted Display," Proc. 1992 Symp. on Interactive 3D Graphics, pp. 135-138.

.... et al. 1993] Military : Macedonia, et al. 1994] Maintenance: Wilson, et al. 1995] Wayfinding: Witmer, et al. 1995] Visualization of unrealized or unseeable objects Architecture: Brooks 1986] Fluid Flow: Bryson and Levit 1992] Nano surfaces: Taylor, et al. 1993] Design 3D models: [Butterworth, et al. 1992] Cityscapes: Mapes and Moshell 1995] Table 1: Successful Virtual World Application Domains Figure 1: The precise manipulation of objects is hard in virtual environments. The number of successful virtual environment applications, however, still remains small, with even fewer applications ....

J. Butterworth, A. Davidson, S. Hench and T. Olano (1992). "3DM: A Three Dimensional Modeler Using a Head-Mounted Display." Computer Graphics (Proceedings 1992 Symposium on Interactive 3D Graphics) 25(2): 135-138.

....in the Virtual Habitat We also want the user to be able to apply this newfound knowledge in a real world setting. Therefore, the second component of the virtual habitat application allows immersive design the modification of the existing habitat design while immersed within the habitat (Butterworth et al., 1992, Mine, 1997) Immersive design can tighten the design cycle and allow users to view the effects of changes immediately, but it is also quite different from the way architects are accustomed to designing. They must be able to reason and create in three dimensions, from within the design itself, ....

Butterworth, J., Davidson, A., Hench, S., and Olano, M. (1992). 3DM: A Three Dimensional Modeler Using a Head-Mounted Display. Proceedings of the ACM Symposium on Interactive 3D Graphics, 135-138.

....improvement in ergonomics and precision for engineering tasks. Development of JDCAD system (now called JDCAD ) continues at the University of Alberta with the addition of new animation editing and scene composition functions. One of the few HMD based modelling systems called 3DM was presented by Butterworth et al. 1992). It includes several grid and snap functions, an extrusion tool for surface creation and some other interesting features. It lacks, however, many of the other aids and constraints that since have been found necessary for accomplishing precise work, as rated by Mine (1996) who presented the ....

Butterwort, J., Davidson, A., Hench, S. and Olano, T.M. (1992) 3DM: A Three Dimensional Modeler Using a Head-Mounted Display. Computer Graphics. Proceedings 1992 Symposium on Interactive 3D Graphics 25(2), pp. 135-138.

....(SDL) Alias also has key frame animation. The user can specify motion paths, curve following, and change the interpolation function. Animation sequences produced by Alias are not interactive. Each object is independent and does not react to other objects. Butterworth et al. build the 3DM system [3] at the University of North Carolina. This system uses a Polhemus 3Space Isotrak as an input device. The user of 3DM wears a head mounted display to give the effect of being in the modeling space. 3DM currently does not support behavior or animation. Emanuel Sachs et al. at MIT built the 3 Draw ....

....variable that represents the interpolated matrix between the first and second Transform. Note that time ranges from 0 to 1. Tr = inbetween(finger1 kf[1] finger1 kf[2] time) settrans(finger1,Tr) Tr = inbetween(knuckle1 kf[1] knuckle1 kf[2] time) settrans(knuckle1,Tr) Tr = inbetween(finger2 kf[3],finger2 kf[4] time) settrans(finger2,Tr) Tr = inbetween(knuckle2 kf[1] knuckle2 kf[2] time) settrans(knuckle2,Tr) Tr = inbetween(finger3 kf[3] finger3 kf[4] time) settrans(finger3,Tr) Tr = inbetween(knuckle3 kf[1] knuckle3 kf[2] time) settrans(knuckle3,Tr) Tr = inbetween(finger4 ....

[Article contains additional citation context not shown here]

Butterworth, J., A. Davidson, S. Hench, and T. M. Olano, "3DM: A Three Dimensional Modeler Using a Head-Mounted Display," Proc. 1992 Symposium on Interactive 3D Graphics, Cambridge, Massachusetts, March 29--April 1 1992, 135--138.

.... Training and practice of different skills Surgery: Hunter 1993] Military : Macedonia 1994] Maintenance: Wilson 1995] Wayfinding: Witmer 1995] Visualization of unrealized or unseeable objects Architecture: Brooks 1986] Fluid Flow: Bryson 1992] Nano surfaces: Taylor 1993] Design 3D models: [Butterworth 1992] Cityscapes: Mapes 1995] Table 1: Successful Virtual World Application Domains The number of successful virtual environment applications, however, still remains small, with even fewer applications having gone beyond the research laboratory. Why Many of these successes fall within the realm of ....

Butterworth, J., A. Davidson, S. Hench and T.M. Olano. "3DM: A Three Dimensional Modeler Using a Head-Mounted Display." Computer Graphics. Proceedings 1992 Symposium on Interactive 3D Graphics 25(2): 135-138.

....to go beyond straightforward interpretation of physical device data [27] 2] AT T s embryonic CAD modeler [39] is an example of a system showing the importance of pattern recognition coupled to expressive input devices, through the use of thumb posture classification and voice input. UNC s 3DM [5] is a threedimensional surface modeling application using a head mounted display and a custom made 6D mouse. In both systems, the user interface takes little profit of 3D space, mostly using three dimensional menus and limiting direct manipulation to point dragging and transformation ....

Butterworth J., Davidson A., Hench S., Olano TM (1992), 3DM: A Three Dimensional Modeler Using a Head-Mounted Display. Proc. SIGGRAPH Symposium on Interactive 3D Graphics: 135-138.

....suitable for use in a virtual environment as it is not intuitive or interactive. Although it is possible to make any object with this tool, it is only practical for constructing very simply ones because the process is very slow. 2.2.2. Extrusion Tool An example of an extrusion tool is given in [Butterworth 92] First the user traces out the perimeter of an area. The area is then grabbed and moved. The result is the volume traced out by the area. This tool enables the user to create complex objects rapidly if an input device is used that allows arbitrary rotation of the area during extrusion. Once ....

....devices to obtain maximum intuitiveness and interaction. Another disadvantage is that it uses very heavy computation. It therefore requires an expensive computer system to obtain the speed required for immersive interaction. Page 16 2.2.9. Direct Point Moving This is another tool mentioned in [Butterworth 92] It involves the selection and moving (translating and rotating) of a set of vertices. This tool is best applied to objects constructed purely of triangles. The reason for this is that if a polygon has more than three vertices, the translation of one or more of the vertices can make the set ....

Jeff Butterworth, Andrew Davidson, Stephen Hench and T.Marc Olano. "3DM: A Three Dimensional Modeler Using a Head-Mounted Display". Symposium on Interactive 3D Graphics 1992.

....technology (in particular the tracking technology and graphics system) the system addressed many of the issues that face developers of interactive design systems today. 3DM (Three dimensional modeler) is the interactive design system created at the University of North Carolina in the early 90 s [Butterworth, et al. 1992]. Using a stereo head mounted display and a single 6 DOF bat, 3DM allows users to interactively create geometric objects from within a virtual environment. 3DM includes several grid and snap functions; it lacks, however, many of the other aids and constraints that we since have found necessary for ....

J. Butterworth, A. Davidson, S. Hench and T. Olano (1992). "3DM: A Three Dimensional Modeler Using a Head-Mounted Display." Computer Graphics (Proceedings 1992 Symposium on Interactive 3D Graphics) 25(2): 135-138.

....accelerator, thus largely divorcing rendering from the main CPU. The best known retained mode API is PHIGS which supports a hierarchical display list. The main disadvantage with retained mode is that, for some applications, you must replicate the database. For example, the 3DM application [Butterworth et al. 1992] at UNC (a 3D MacDraw like tool for use under the HMD) maintains an application specific database and issues PHIGS editing commands. This results in two independent copies of the dataset. 4.5.2 Immediate mode Immediate mode is well suited for data that change a great deal every frame. For example, ....

Butterworth, Jeff, Andrew Davidson, Stephen Hench, and Marc T. Olano. 1992. 3DM: A Three Dimensional Modeler Using a Head-Mounted Display, Proc 1992 Workshop on Interactive 3D Graphics, 135-138.

....in his left hand to specify a moving reference frame, and used another sensor (in the form of a stylus) to draw and edit 3D curves in space. A graphics display was used to visualize the scene from a virtual camera position. Butterworth et al. built the 3DM system at University of North Carolina [1]. The system uses a head mounted display to place the designer in the modeling space. The input device is a Polhemus 3Space Isotrak mounted in a hollowed out billiard ball with two buttons on it. The designer used the hand held tracker to select functions from a toolbox, and to create manipulate ....

Butterworth, J., A. Davidson, S. Hench, and T. M. Olano, "3DM: A Three Dimensional Modeler Using a Head-Mounted Display," Proc. 1992 Symposium on Interactive 3D Graphics, Cambridge, Massachusetts, March 29--April 1 1992, 135--138.

....We developed a custom file format called jet (and a parser for it) to represent the compressed vortex geometry. We also developed a custom toolkit to implement 3D menus, buttons, and sliders (figure 2) These widgets have text labels (using Hershey fonts) rather than icons like the menus in 3dm [Butter]. Buttons and menus can be grabbed and repositioned, and they can be dismissed. The widgets are convected downstream with the view position in order to remain within reach of the viewer during the animation. We apply textures to the widgets as well as to the landscape in order to reduce the ....

Jeff Butterworth, Andrew Davidson, Stephen Hench, and T. Marc Olano. "3DM: A Three Dimensional Modeler Using a Head-Mounted Display." Proceedings 1992 Symposium on Interactive 3D Graphics (Cambridge, MA), pp. 135-138.

....3 Draw [Sachs et al. 1991] constructs skeletal objects by tracing curves and cross sections in three dimensions with two Polhemus trackers; one fastened to a pen, with which the wireframe is sketched, and the other to a stylus, which serves as a frame of reference. 3DM (Three Dimensional Modeller) [Butterworth et al. 1992] borrows from the success of two dimensional drawing programs. The user selects from a virtual toolbox with extrusion, sweeping, primitive instancing, cutting, pasting, and copying functions. The system employs a VPL Eyephone head mounted display for stereoscopic viewing, a Polhemus tracker ....

Butterworth J., Davidson A., Hench S. and Olano T. (1992) 3DM: A Three Dimensional Modeler Using a Head-Mounted Display. Proceedings of 1992 Symposium on Interactive 3D Graphics, ACM SIGGRAPH, pp. 135-138.

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Butterworth, J., "3DM: A Three Dimensional Modeler Using a Head-Mounted Display", Computer Graphics: Proceedings of 1992.

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J. Butterworth et al., "3DM: A Three Dimensional Modeler Using a Head-Mounted Display," Proc. ACM Interactive 3D Graphics, ACM, New York, 1992, pp. 135-139.

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J. Butterworth et al., "3DM: A Three-Dimensional Modeler Using a Head-Mounted Display," Proc. the Symp. on Interactive 3D Graphics, ACM Press, New York, 1992, pp. 134-138.

No context found.

Butterworth, Jeff, Andrew Davidson, Stephen Hench, T. Marc Olano. "3DM: A Three Dimensional Modeler Using a Head-Mounted Display." Computer Graphics: 1992 Symposium on Interactive 3D Graphics, March 1992, 135-138.

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Butterworth J, Davidson A, Hench S, Olano TM (1992) 3DM: A Three Dimensional Modeler Using a Head-Mounted Display. Proc. SIGGRAPH Symposium on Interactive 3D Graphics: 135-138.

No context found.

Butterworth J., Davidson A., Hench S., Olano TM (1992) 3DM: A Three Dimensional Modeler Using a HeadMounted Display. Proceedings SIGGRAPH Symposium on Interactive 3D Graphics: 135-138.

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