Fig 4 - uploaded by Alexander Pasko
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Interactive modeling applied to texture a BRep object. (Left) Several B-spline primitives are used to define the space partitions. (Right) The corresponding textured BRep object rendered using a surface ray-tracing engine.
Source publication
In this paper, we propose a framework for modeling and deforming heterogeneous volumetric objects defined as point sets with attributes. We propose to use constructive hypervolume objects, where the function representation (FRep) is used as the basic model for both object geometry and attributes represented independently using real-valued scalar fu...
Contexts in source publication
Context 1
... the case of a geometric model other than FRep, the only difference in the modeling process is that the geometric model should be imported first, as Fig. 4 shows. In this example, a standard B-rep object (the polygonal "Stanford Bunny") has been loaded, and different space partitions were modelled using the B-spline modeller. In this example, several cubic B-spline primitives were used to create space partitions for photometric attributes (colours and other shading parameters). While ...
Context 2
... a standard B-rep object (the polygonal "Stanford Bunny") has been loaded, and different space partitions were modelled using the B-spline modeller. In this example, several cubic B-spline primitives were used to create space partitions for photometric attributes (colours and other shading parameters). While modeling, simple colours are used as in Fig. 4(left) to show which partition a vertex belongs to. One can then export the object to POV-Ray [39] or other formats for rendering. For each vertex defined in the B-rep model, a tree traversing procedure is executed, and depending on the partition the vertex belongs to, a texture index is ...
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Citations
... These methods are more focused on drawing a specific shape, and cannot directly be applied for rendering the energy-wave. Pasko [11], Schmitt [12] and Børlum [13] can express transparency and intensity. These methods are, however, for simulating the optical phenomenon of the incoming light within the geometric shape, and not suitable for the energy-wave expression in which the space itself emits the light. ...
... 1. Solve equation (12) and find real solutions that are within the parameter domain of the curve (eg. 0 ≤ t i ≤ 1 if the curve is a Bézier curve,) which are denoted as {t 1 , t 2 , t 3 }. ...
A visual expression called Energy-Wave, which shows light emission from high-energy fields, is popularly used in creative contents such as animations and computer games. This research proposes a new method for representing energy-Wave in real-time 3D graphics. Conventional energy-wave rendering techniques use the animation texture or the particle animation. However, the animation-texture method restricts the view point, and the boundaries of the energy-wave appear too clearly. The particle-animation method is not suitable for showing a dense energy field and not appropriate for covering a wide region. This paper presents a new method in which the energy distribution is described as a continuous scalar function. The new method is advantageous over the conventional methods since there is no restriction of the view point, resolution, and the covering region. The proposed method also utilizes GPGPU, and the output images are dynamically created from small input and can quickly deform the shape of the energy wave. The previous work of this research was able to deal with point-centered and line-centered energy-distribution functions. The new method can deal with torus-shaped and quadratic curve-centered distribution functions quickly.
