Computer graphics processing and selective visual display system – Computer graphics processing – Three-dimension
Reexamination Certificate
2006-08-29
2006-08-29
Zimmerman, Mark (Department: 2671)
Computer graphics processing and selective visual display system
Computer graphics processing
Three-dimension
C345S423000, C345S424000
Reexamination Certificate
active
07098910
ABSTRACT:
A method for rendering hair particles includes determining a grid with vertices and voxels bounding the hair particles, determining hair densities for the vertices, smoothing the hair densities, solving a distance function to form a distance field in response to the smooth hair densities, wherein a distance function returns zero at a pre-determined hair particle density, determining a surface normal direction for a hair particle in response to the distance field values, determining a hair illumination value in response to a first illumination source, and determining a shading value for the hair particle using the hair illumination value and the surface normal direction for the hair particle.
REFERENCES:
patent: 4866612 (1989-09-01), Takagi et al.
patent: 4914589 (1990-04-01), Crawford
patent: 5644689 (1997-07-01), Ban et al.
patent: 5758046 (1998-05-01), Rouet et al.
patent: 5777619 (1998-07-01), Brinsmead
patent: 5793375 (1998-08-01), Tanaka
patent: 6040835 (2000-03-01), Gibson
patent: 6559849 (2003-05-01), Anderson et al.
patent: 6600487 (2003-07-01), Henn et al.
patent: 6720962 (2004-04-01), Alter
Kim et al., “Interactive Muliresolution Hair Modeling and Editing”, 2002, pp. 620-629, ACM 1-58113-521.
Perlin, “Hypertexture”, 1989, pp. 253-261, ACM-0-89791-312.
Kajiya, “Rendering fur with three dimensional textures”, 1989, pp. 271-280, ACM-0-89791-312.
Drebin et al, “Volume Rendering”, 1988, pp. 65-74, ACM-0-89791-275.
Lokovic, “Deep Shadow Maps”, 2000, pp. 385-392, ACM 2000-1-58113-208.
Breen et al., 3D Scan Convertion of CSG Models into Distance Volumes, Califronia Institute of Technology, University of Tennessee, Knoxville.
Huang et al., A Complete Distance Field Representation, Computer and Information Science, the Ohio State University, Columbus, OH.
Jones, The Production of Volume Data from Triangular Meshes Using Voxelisation, Vol. 15, 1996, No. 5, pp. 311-318.
Jones et al., Shape Representation Using Space Filled Sub-Voxel Distance Fields, Department of Computer Science, University of Wales, Swansea, Singleton Park, Swansea, United Kingdom.
Satherly et al., Hybrid Distance Field Comoputation, University of Wales, Swansea, Singleton Park, Swansea, SA2 8PP, United Kingdom.
Sethian, Level Set Methods and Fast Marching Methods, Evolving INterfaces in Computational Geometry, Fluid Mechanics, Computer Vision, and Materials Science, Cambridge University Press, 1999, downloaded from http://math.berkeley.edu/˜sethia/level_set.html.
Anderson John R.
Petrovic Lena
Townsend and Townsend / and Crew LLP
Wallace Scott
Zimmerman Mark
LandOfFree
Hair rendering method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hair rendering method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hair rendering method and apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3658944