Weil, J. (1986). The synthesis of cloth objects. In Evans, D. C. and Athay, R. J., editors, Computer Graphics (SIGGRAPH '86 Proceedings), volume 20, pages 49--54.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....the number of parameters for improving the interface between the animator and the physics based model. Keywords and phrases: cloth animation, garment design, discretization, dynamic constraints, collision responses, deformable surface model 1. Introduction In recent years, several models [17,15,7,6,1,5,11] have been proposed to animate deformable and soft objects such as rubber, paper, cloth, and so on. However, no complete methodology has been proposed to perform cloth modelling and animation for the complex case of synthetic actors [9] 1. 5255 ....

Weil Jerry. The Synthesis of Cloth Objects. In Proc. pp.49-54.

....surfaces mixed with particle systems, as we can see in [11] Physically based models are well suited to provide natural motion for flexible objects. One of the first physically based models was developed by Weil and used to simulate cloth by interpolating the surfaces between catenary curves [36]. Barr, Terzopoulos, Platt and Fleisher have used discrete molecular components to model the elastic behavior of objects [22] Terzopoulos and Fleischer have extended the model mixing flexible and rigid components [33] and to simulate also inelastic behavior [32] Many other techniques have been ....

Weil, J. "The Synthesis of Cloth Objects", Computer Graphics, v. 22, n. 4, p. 269-278, 1988.

....reasons, cloth animation needs to be based on a precise model, able to take into account both geometric and physical properties of the fibres. On one hand, the literature abounds in papers dealing with woven cloth. In the early eighties, Jerry Weil proposed a geometric model for hanging cloth [Wei186]. The introduction of dynamics in the woven cloth modelling scheme [Terzopoulos87] Breen92] Eberhardt96] induced real improvements, leading to realistic animation of virtual clothes [Carignan92] Volino95] Provot95] On the other hand, the knitted cloth study is still marginal. This fact can ....

Weil,J. : The synthesis of cloth objects, Computer Graphics, Vol.20, No.4, pp 49-53, 1986.

....1 Introduction 1. 1 Background Woven fabrics have been widely studied in computer graphics in order to find appropriate models describing their particular properties, namely their static behavior (e.g. drape) and their dynamic behavior (e.g. buckling propagation) Early studies can be found in [1, 2, 3, 4], but regarding cloth animation with which we were mostly concerned, physically based models have proved to be both the most efficient and realistic. Among the physicallybased models used in cloth animation, elastically deformable models have been used successfully in order to give a ....

Weil Jerry. The Synthesis of Cloth Objects.

....to produce anomalous events, given fixed initial conditions, the ability to produce a variety of visualizations for evaluating a fitting result. 2 3 A Tchebychev Net Cloth Model Within computer graphics cloth models [20] are identified as either physically based [1, 7, 33] geometry based [37], or a combination of both [8, 27] We present a geometry based cloth model called a Tchebychev net in which cloth is assumed to be made of inextensible threads. Ever since Tchebychev proposed a model of cloth in his lecture in the late 19th century [32] Tchebychev nets have been investigated ....

Weil, J. (1986), The Synthesis of Cloth Objects, Computer Graphics, Vol. 20, No. 4, pp. 359-376. 25

....and interactive manipulation methods for controlling the shape of the resulting tensor product surfaces [fowl92] celn92] Free form surfaces have been animated by specifying time dependent changes in the values of the underlying surface controls. For example, Weil s geometric model for cloth [weil86] has been animated by specifying the motion paths of the control points. By moving the control points and then applying the relaxation step between animation frames, the quality of the resulting animation is due primarily to the motion of the control points. However, most surface models do not ....

J. Weil. "The synthesis of cloth objects". Computer Graphics (SIGGRAPH '86 Proceedings), Vol. 20, No. 4, pp. 49--54, August 1986.

....on several layers or, more generally, any other kind of surface not necessarily discretised into uniform triangulation. 2 Previous work Previous works on deformable object animation using physically based models have permitted animation of cloth like objects in many kinds of situations. Weil [35] pioneered cloth animation using an approximated model based on relaxation of the surface. Haumann et al. produced animations with flags or leaves moving in the wind, or curtains blowing in a breeze [16] Kunii and Gotoda used a hybrid model incorporating physical and geometrical techniques to ....

: J. Weil, "The synthesis of Cloth Objects", Computer Graphics (proc. SIGGRAPH'86), 4, pp 49-54, 1986.

....REVIEW Generally speaking, there are two categories of techniques for the simulation of cloth deformation: the geometric and the physically based approaches. The geometric techniques are usually less expensive, but do not take the physical and mechanical properties of cloth into account. Weil [Weil86] represented a hanging cloth as a grid of points. The cloth s shape was represented by fitting catenary curves between the hanging points and the constrained points. Agui, Nagao and Nakajma [Agui90] used a hollow cylinder consisting of a series of circular rings to model a sleeve on a bending arm. ....

Weil, J., 1986, The synthesis of cloth objects, Computer Graphics (Proc. SIGGRAPH), Vol. 20, pp. 49-54.

....and includes a skeleton, joints and muscles. Many researchers are working in the cloth design, modelling and animation [4] 10] with various approaches. Both physical and geometric methods have been used to model cloth. Geometric approaches try to imitate the shape of cloth. For example, Weil [20] uses catenary curves to approximate the appearance of hanging cloth from its corners. Hybrid techniques combine geometric approaches with some sort of physical phase. Rudomn [13] approximates the initial state of draping cloth on an object with its convex hull, then continues with physical ....

J. Weil. The synthesis of cloth objects. Computer Graphics (SIGGRAPH '86 Proceedings), 20(4):49--54, August 1986.

....can have a large influence on the appearence of a person (wide or tight trousers, different jackets, etc. Clothing can also cause complex illumination phenomena that, in addition, change during movement (compare with efforts in the field of computer graphics to simulate such phenomena, e.g. Weil [28] ) Because of these difficulties most of the previous approaches assume the joints of the human body to be marked (e.g. Rashid [20] Webb Aggarwal [27] Goddard [7] Chen Lee [5] Quian Huang [19] or investigate synthetic images (e.g. O Rourke Badler [17] Tsuji et al. 25] Among those ....

J. Weil, The Synthesis of Cloth Objects, Computer Graphics 20 (1986) 4, 49-54

....for visualization and modeling of woven materials and knitted fabrics were already proposed in computer graphics literature. Researches were mainly done in two directions: investigation of physical and mechanical phenomena of woven textiles (such as deformation, wrinkling and crumpling) [2, 4]; investigation of optical properties of the cloth [1, 3, 5] From the optical point of view the realism of an image is the result of a good correspondence of the local light scattering model applied. Some classes of objects are satisfactory described by computationally simple nonphysically ....

Jerry Weil. The Synthesis of Cloth Objects. ACM SIGGRAPH-86, Vol. 20, No. 4, pp. 49-54.

....to be solved: the motion of the cloth without collision detection and the collision detection of the cloth with the body and with itself. Previous works on deformable object animation using physically based models have permitted animation of cloth like objects in many kinds of situations. Weil [3] pioneered cloth animation using an approximated model based on relaxation of the surface. Haumann and Parent [4] produced animations with flags or leaves moving in the wind, or curtains blowing in a breeze. Kunii and Godota [5] used a hybrid model incorporating physical and geometrical techniques ....

J. Weil, "The synthesis of Cloth Objects", Computer Graphics (proc. SIGGRAPH'86), 4, pp 49-54, 1986.

....State of art in cloth synthesis and animation The evolution of cloth synthesis has gone though several phases. The first one, and the most important, has been to simulate efficiently fabric motion and deformations using mechanical computer simulation. These techniques have been pioneered by Weil [C23], Terzopoulos et al. 1987) and Haumann and Parent (1988) using different kinds of mechanical models based on triangular discretisation of the simulated surface. More recently, several other techniques have been explored, such as polynomial surfaces (Witkin and Welch [C25] Baraff and Witkin ....

Weil J. (1986), "The synthesis of Cloth Objects", Proc. SIGGRAPH'86, Computer Graphics, 4, pp 49-54.

....are attempting to create an engineering model of cloth that draws heavily on modeling and visualization techniques that have been explored most fully by the computer graphics community. 2.2. 1 Computer Animation Models The first published model of cloth for computer animation was presented by Weil [61]. He describes a twostep geometric process that models a rectangular cloth structure hanging from several constraint points. The first step of his algorithm recursively connects the constraint points with catenary curves. The second step uses a relaxation technique to enforce distance constraints ....

Weil, J., "The Synthesis of Cloth Objects," Computer Graphics (Proc. SIGGRAPH), Vol. 20, No. 4, pp. 359-376, 1986.

....systems has lead to a variety of explorations into specialized modeling and visualization tools [6, 24, 25, 47] into computational issues [26, 27, 34] and CAD technologies [3, 4] 2.2 Cloth modeling 2.2. 1 computer animation models The first computer animation model of cloth was by Weil [50], who used a two step geometric process to model a rectangular cloth hanging from several constraint points. Dhande et al. 17] present a hybrid drape model, which relates the parameters of a swept surface to fabric mechanical properties. Feynman [19] developed the first true physically based ....

Weil, J., "The Synthesis of Cloth Objects," Computer Graphics (Proc. SIGGRAPH), Vol. 20, No. 4, pp. 359-376, 1986.

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Weil, J. (1986). The synthesis of cloth objects. In Evans, D. C. and Athay, R. J., editors, Computer Graphics (SIGGRAPH '86 Proceedings), volume 20, pages 49--54.

No context found.

Weil J. The synthesis of cloth objects. SIGGRAPH 86 conference proceedings, annual conference series. vol. 20. Reading, MA: Addison Wesley; 1986 p. 49--54.

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J. Weil. The synthesis of cloth objects. Computer Graphics, 20(4):49--54, 1986.

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J. Weil. The synthesis of cloth objects. In ACM Computer Graphics (Proceedings of SIGGRAPH'86), pages 49--53, 1986.

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J. Weil. The synthesis of cloth objects. Comput. Graph. (SIGGRAPH Proc.), pages 49--54, 1986.

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Weil, J. The synthesis of cloth objects. Proceedings of SIGGRAPH'86 (Dallas, August 18--22, 1986.

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J. Weil. The synthesis of cloth objects. Computer Graphics (Proc. of SIGGRAPH) , Vol. 20, No. 4, pages 49-53, 1986.

No context found.

Weil, J. (1986). The synthesis of cloth objects. In Evans, D. C. and Athay, R. J., editors, Computer Graphics (SIGGRAPH '86 Proceedings), volume 20, pages 49--54.

No context found.

Weil J. The synthesis of cloth objects, in Proceedings Computer Graphic, Annual Conference Series, (ACM SIGGRAPH, August 1986), 49-53.

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J. Weil, The Synthesis of Cloth Objects, Computer Graphics, Proceedings SIGGRAPH'86,

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