Source Code 1994 March

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Text File | 1993-08-11 | 66.4 KB | 2,694 lines

Newsgroups: comp.sources.misc From: casey@gauss.llnl.gov (Casey Leedom) Subject: v38i105: lic - LLNL Line Integral Convolution, v1.2, Part02/10 Message-ID: <1993Aug12.013754.13937@sparky.sterling.com> X-Md4-Signature: b6ad5468c8b8d4c9f0c5c12e2ca54eb4 Sender: kent@sparky.sterling.com (Kent Landfield) Organization: Sterling Software Date: Thu, 12 Aug 1993 01:37:54 GMT Approved: kent@sparky.sterling.com Submitted-by: casey@gauss.llnl.gov (Casey Leedom) Posting-number: Volume 38, Issue 105 Archive-name: lic/part02 Environment: UNIX #! /bin/sh # This is a shell archive. Remove anything before this line, then feed it # into a shell via "sh file" or similar. To overwrite existing files, # type "sh file -c". # Contents: lic.1.2/MEMO lic.1.2/doc/siggraph93/paper.ps.C # Wrapped by kent@sparky on Wed Aug 11 19:38:02 1993 PATH=/bin:/usr/bin:/usr/ucb:/usr/local/bin:/usr/lbin ; export PATH echo If this archive is complete, you will see the following message: echo ' "shar: End of archive 2 (of 10)."' if test -f 'lic.1.2/MEMO' -a "${1}" != "-c" ; then echo shar: Will not clobber existing file \"'lic.1.2/MEMO'\" else echo shar: Extracting \"'lic.1.2/MEMO'\" $912 characters$ sed "s/^X//" >'lic.1.2/MEMO' <<'END_OF_FILE' X Monday, May 17, 1993 X XTo: Marliss Rash X XFrom: Leith (Casey) Leedom X XRegarding: Memo of understanding for release of ``LIC'' software X X XMarliss, X XThe Line Integral Convolution (LIC) software is a prototype Ximplementation of a new vector visualization algorithm that Brian XCabral and I have jointly developed. The algorithm is described in a Xpaper written by us in the upcoming 1993 SIGGRAPH conference: X``Imaging Vector Fields Using Line Integral Convolution.'' X XThe SIGGRAPH conference is putting together a CD-ROM of conference Xpaper materials. SIGGRAPH would like to include source code whenever Xpossible in order that other researchers be able to duplicate results Xpresented in the papers. We would like to supply SIGGRAPH with our Xexperimental software since this will significantly enhance our Xability to work with other researchers in this area. X X X Yours sincerely, X X Leith (Casey) Leedom END_OF_FILE if test 912 -ne `wc -c <'lic.1.2/MEMO'`; then echo shar: \"'lic.1.2/MEMO'\" unpacked with wrong size! fi # end of 'lic.1.2/MEMO' fi if test -f 'lic.1.2/doc/siggraph93/paper.ps.C' -a "${1}" != "-c" ; then echo shar: Will not clobber existing file \"'lic.1.2/doc/siggraph93/paper.ps.C'\" else echo shar: Extracting \"'lic.1.2/doc/siggraph93/paper.ps.C'\" $61490 characters$ sed "s/^X//" >'lic.1.2/doc/siggraph93/paper.ps.C' <<'END_OF_FILE' XLT0 X1008 1938 M X1008 1938 L X1068 2328 L X1128 2727 L X1189 3122 L X1249 3497 L X1309 3839 L X1369 4136 L X1429 4377 L X1490 4553 L X1550 4659 L X1610 4689 L X1670 4643 L X1731 4524 L X1791 4334 L X1851 4081 L X1911 3774 L X1971 3424 L X2032 3044 L X2092 2647 L X2152 2248 L X2212 1862 L X2272 1502 L X2333 1180 L X2393 910 L X2453 701 L X2513 559 L X2574 491 L X2634 499 L X2694 582 L X2754 737 L X2814 960 L X2875 1241 L X2935 1571 L X2995 1938 L X3055 2328 L X3115 2727 L X3176 3122 L X3236 3497 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The images in all the) 54 403.43 P X(\336gures are contrast stretched.) 54 392.93 T X0 F X(4.3 IMPLEMENT) 54 372.93 T X(A) 123.75 372.93 T X(TION AND APPLICA) 129.57 372.93 T X(TION) 214.29 372.93 T X1 F X1.63 (The LIC algorithm is designed as a function which maps an) 63 359.93 P X0.36 (input vector \336eld and texture to a \336ltered version of the input tex-) 54 349.44 P X0.03 (ture. The dimension of the output texture is that of the vector \336eld.) 54 338.95 P X0.1 (If the input texture is smaller than the vector \336eld the implementa-) 54 328.45 P X0.77 (tion of the algorithm wraps the texture using a toroidal topology) 54 317.96 P X0.77 (.) 291.75 317.96 P X1.33 (That is, the right and left edges wrap as do the top and bottom) 54 307.47 P X1.12 (edges. If the texture is too lar) 54 296.97 P X1.12 (ge it is cropped to the vector \336eld) 165.62 296.97 P X0.3 (dimensions. 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The LIC) 317.29 518.25 P X-0.18 (implementation is a module in a data \337ow system like that found in) 317.29 508.25 P X0.37 (a number of public domain and commercial products. This imple-) 317.29 498.25 P X0.36 (mentation allows for rapid exploration of various combinations of) 317.29 488.25 P X(operators.) 317.29 478.25 T X0 F X(4.3.1 POST PROCESSING) 317.29 459.65 T X1 F X0.2 (The output of the LIC algorithm can be operated on in a variety) 326.29 448.05 P X1.46 (of ways. In this section several standard techniques are used in) 317.29 438.05 P X(combination with LIC to produce novel results.) 317.29 428.05 T X2.87 (An interesting example of constant kernel normalization is) 326.29 416.45 P X0.53 (shown in \336gure 9. A simple basket weave pattern is generated by) 317.29 406.45 P X3.12 (alternating vector directions in a checkerboard fashion. Each) 317.29 396.45 P X1.61 (checker is surrounded by null vectors. 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The [\336xed normalization] \337uid dynamics \336eld of \336gure 8) 81.17 393.43 P X-0.06 (is multiplied by a color image of the vector magnitude. The advan-) 54 383.43 P X1.92 (tage of this approach over variable length LIC is that the \336ne) 54 373.43 P X1.29 (grained detail generated by \336xed length LIC is retained even in) 54 363.43 P X(low magnitude areas.) 54 353.43 T X-0.01 (The LIC algorithm can be used to process an image using a vec-) 63 340.64 P X-0.05 (tor \336eld generated from the image itself. In \336gure 12, a vector \336eld) 54 330.64 P X0.31 (is generated from the input image by low-pass \336ltering the image,) 54 320.64 P X0.49 (taking the gradient of the resulting image and rotating the vectors) 54 310.64 P X(by 90) 54 300.64 T X4 F X(\260) 74.22 300.64 T X1 F X(.) 77.82 300.64 T X0.87 (The LIC algorithm can also be used to post process images to) 63 287.86 P X0.98 (generate motion blur) 54 277.86 P X0.98 (. A rendering algorithm or paint system can) 130.36 277.86 P X0.01 (easily specify a pixel by pixel velocity \336eld for objects. By using a) 54 267.86 P X0.79 (biased triangle \336lter[10] and variable length LIC the input image) 54 257.86 P X-0.1 (can be motion blurred in the direction of apparent motion. This has) 54 247.86 P X0.84 (precisely the desired results for motion blurring as seen in \336gure) 54 237.86 P X(13.) 54 227.86 T X0 F X(4.4 THREE-DIMENSIONAL LIC) 317.29 732 T X1 F X2.47 (The LIC algorithm easily generalizes to higher dimensions.) 326.29 721.25 P X0.69 (Equations \0501\051, \0503\051 and \0505\051 trivially extend to three dimensions. In) 317.29 711.25 P X0.19 (the three-dimensional case, cell edges are replaced with cell faces.) 317.29 701.25 P X0.34 (Both the input vector \336eld and input texture must be three-dimen-) 317.29 691.25 P X1.81 (sional. The output of the three-dimensional LIC algorithm is a) 317.29 681.25 P X2.39 (three-dimensional image or scalar \336eld. This \336eld is rendered) 317.29 671.25 P X-0.06 (using volume rendering techniques such as those found in [21] and) 317.29 661.25 P X([6].) 317.29 651.25 T X1.48 (Figure 14 is a three-dimensional rendering of an electrostatic) 326.29 640.5 P X0.07 (\336eld with two point char) 317.29 630.5 P X0.07 (ges placed a \336xed distance apart from one) 405.79 630.5 P X0.57 (another) 317.29 620.5 P X0.57 (. In this volumetric rendering, the magnitude of the vector) 343.74 620.5 P X1.13 (\336eld is used to control the opacity transfer functions. Great ef) 317.29 610.5 P X1.13 (\336-) 549.3 610.5 P X0.33 (ciency gains can be achieved if the LIC algorithm exploits this by) 317.29 600.5 P X0.79 (avoiding rendering for vector \336eld cells whose magnitude is out-) 317.29 590.5 P X(side of the volume renderer) 317.29 580.5 T X(\325) 416.45 580.5 T X(s min/max threshold window) 418.95 580.5 T X(.) 522.97 580.5 T X0 F X(5. PERFORMANCE) 317.29 562.75 T X1 F X1.38 (There is a distinct performance and quality trade-of) 326.29 552 P X1.38 (f between) 520.72 552 P X0.36 (the DDA convolution algorithm and LIC. LIC is roughly an order) 317.29 542 P X0.21 (of magnitude slower than the DDA method. Both algorithms were) 317.29 532 P X2.03 (timed using cells processed per second \050CPS\051 as the \336gure of) 317.29 522 P X-0.22 (merit. The tests were run on an unloaded IBM 550 RISC 6000. The) 317.29 512 P X1.2 (DDA algorithm averages about 30,000 CPS while LIC averages) 317.29 502 P X(about 3,000 CPS.) 317.29 492 T X1.67 (The three-dimensional algorithm only mar) 326.29 481.26 P X1.67 (ginally degrades in) 485.56 481.26 P X0.42 (performance with the increase in dimensionality) 317.29 471.26 P X0.42 (, processing some) 492.29 471.26 P X3.51 (1,200 CPS. Since the algorithm remains one-dimensional in) 317.29 461.26 P X1.26 (nature, the cost per cell only increases by a factor of three as a) 317.29 451.26 P X-0.2 (function of dimension. Using the thresholding described above, the) 317.29 441.26 P X0.09 (performance of the three-dimensional LIC algorithm has exceeded) 317.29 431.26 P X(30,000 CPS.) 317.29 421.26 T X0 F X(6. FUTURE WORK) 317.29 403.51 T X1 F X1.73 (A number of research directions relating to LIC remain out-) 326.29 392.76 P X(standing.) 317.29 382.76 T X1.29 (Currently no methods exist for determining the accuracy of a) 326.29 372.01 P X1.31 (vector \336eld representation, such as those created by LIC or any) 317.29 362.01 P X-0.11 (other method. These accuracy metrics would necessarily be related) 317.29 352.01 P X54 413.93 293.98 738 C X54 413.93 293.98 738 R X7 X X0 K XV X54 413.93 293.98 440.93 R XV X5 8 Q X0 X X(Figur) 54 435.6 T X(e 12: A photograph \050top\051 of the Flavian Amphitheater is) 72.09 435.6 T X-0.14 (used to cr) 54 426.6 P X-0.14 (eate a vector \336eld. The \336eld is then used to image a) 92.29 426.6 P X(\322painted\323 version of the same photograph \050bottom\051) 54 417.6 T X7 F X(.) 256.43 417.6 T X54.72 446.18 293.26 737.28 R X7 X XV X0.1 H X2 Z X14 X XN X0 0 612 792 C X54 72 293.98 220.54 C X54 72 293.98 220.54 R X7 X X0 K XV X54 72 293.98 99 R XV X5 8 Q X0 X X(Figur) 54 93.67 T X(e 13: The original photo on the left shows no motion blur-) 72.09 93.67 T X(ring The photo on the right uses variable length LIC to motion) 54 84.67 T X(blur Boris Y) 54 75.67 T X(eltsin\325s waving ar) 93.71 75.67 T X(m, simulating a slower shutter) 159.61 75.67 T X54.72 104.26 293.26 219.82 R X7 X XV X0.1 H X2 Z X14 X XN X0 0 612 792 C X317.3 72 557.28 343.51 C X317.3 72 557.28 343.51 R X7 X X0 K XV X317.3 72 557.28 99 R XV X5 8 Q X0 X X(Figur) 317.3 93.67 T X(e 14: A thr) 335.4 93.67 T X(ee-dimensional 512) 374.19 93.67 T X5 6 Q X(3) 449.27 96.87 T X5 8 Q X( electr) 452.59 93.67 T X(ostatic \336eld is) 477.06 93.67 T X-0.1 (imaged by volumetrically ray tracing a thr) 317.3 84.67 P X-0.1 (ee-dimensional sca-) 479.2 84.67 P X(lar \336eld pr) 317.3 75.67 T X(oduced using LIC over white noise.) 355.2 75.67 T X318.02 104.26 556.56 342.79 R X7 X XV X0.1 H X2 Z X14 X XN X0 0 612 792 C XFMENDPAGE X%%EndPage: "7" 8 X%%Page: "8" 8 X612 792 0 FMBEGINPAGE X1 9 Q X0 X X0 K X0.03 (to the dif) 54 732 P X0.03 (ferential topology of the entire vector \336eld. As mentioned) 86.35 732 P X-0.12 (above, much work in theoretical and applied mathematics has been) 54 722 P X-0.11 (done in this area. This work needs to be studied and applied to ef) 54 712 P X-0.11 (\336-) 286.01 712 P X(cient vector \336eld imaging algorithms.) 54 702 T X2.37 (LIC is conceptually independent of the advection algorithm) 63 691.67 P X2.07 (used to de\336ne the parametric support used by the convolution) 54 681.67 P X0.39 (operation. The method described here might be best characterized) 54 671.67 P X2.08 (as a variable step Euler) 54 661.67 P X2.08 (\325) 146 661.67 P X2.08 (s method. Other techniques such as a) 148.5 661.67 P X2.11 (fourth order Runge-Kutta could produce dif) 54 651.67 P X2.11 (fering or improved) 221.89 651.67 P X2.26 (results. A thorough investigation into this issue is beyond the) 54 641.67 P X0.65 (scope of this paper) 54 631.67 P X0.65 (. It does, however) 123.1 631.67 P X0.65 (, represent an area deserving) 188.83 631.67 P X(special attention.) 54 621.67 T X1.73 (V) 63 611.33 P X1.73 (isualizing the orthogonal complement of a two-dimensional) 68.95 611.33 P X0.08 (vector \336eld is accomplished by rotating the individual vectors 90) 54 601.33 P X4 F X0.08 (\260) 288.16 601.33 P X1 F X0.08 (.) 291.75 601.33 P X1.03 (However) 54 591.33 P X1.03 (, in three-dimensional vector \336elds the orthogonal com-) 86.58 591.33 P X0.53 (plement of a vector is a plane. This suggests that a generalization) 54 581.33 P X0.07 (of the one-dimensional LIC \336lter would be a two-dimensional sur-) 54 571.33 P X0.32 (face \336lter) 54 561.33 P X0.32 (. This \336lter would have as its geometric support a dif) 88.01 561.33 P X0.32 (fer-) 281.03 561.33 P X0.16 (ential surface whose normals would be de\336ned by the vector \336eld,) 54 551.33 P X1.37 (thus creating a Surface Integral Convolution \050SIC\051. As with the) 54 541.33 P X-0.04 (LIC, an arbitrary two-dimensional \336lter could then be used to \336lter) 54 531.33 P X(the three-dimensional input image.) 54 521.33 T X-0.21 (Another direction for generalization is to develop versions of the) 63 511 P X2.37 (algorithm which operate directly on curvilinear and arbitrarily) 54 501 P X1.37 (grided vector \336elds without resampling the input data. The LIC) 54 491 P X0.96 (algorithm could easily be modi\336ed to handle arbitrary line inter-) 54 481 P X0.35 (sections and topologies of both type of grids. As with the rectilin-) 54 471 P X6.05 (ear LIC, it would have an analogous three-dimensional) 54 461 P X0.05 (generalization. T) 54 451 P X0.05 (wo additional problems remain however: generat-) 114.32 451 P X1.36 (ing curvilinear and arbitrarily girded textures and output resam-) 54 441 P X(pling.) 54 431 T X0.12 (One possible image processing application of LIC is the deblur-) 63 420.67 P X1.59 (ring of motion blurred images. Images acquired with a moving) 54 410.67 P X1.43 (CCD camera often exhibit such blurring. If the CCD frequency) 54 400.67 P X1.58 (response curves and the camera motion are known, one-dimen-) 54 390.67 P X0.04 (sional deconvolution techniques could be used in conjunction with) 54 380.67 P X(LIC to deblur the images.) 54 370.67 T X0.19 (The local nature of the LIC algorithm suggests a parallel imple-) 63 360.33 P X1.26 (mentation. Such an implementation could, in principle, compute) 54 350.33 P X0.21 (all pixels simultaneously) 54 340.33 P X0.21 (. This would allow for interactive genera-) 143.22 340.33 P X(tion of periodic motion animations and special ef) 54 330.33 T X(fects.) 230.32 330.33 T X0 F X(7. SUMMAR) 54 313 T X(Y) 106.59 313 T X1 F X0.55 (Line integral convolution represents a new and general method) 63 302.67 P X1.39 (for imaging two- and three-dimensional vector \336elds. The algo-) 54 292.67 P X0.37 (rithm \336lters an input image along local stream lines de\336ned by an) 54 282.67 P X0.54 (input vector \336eld and generates an output image. The one-dimen-) 54 272.67 P X0.83 (sional \336lter shape is independent of either input and can be arbi-) 54 262.67 P X2.16 (trary) 54 252.67 P X2.16 (. T) 70.38 252.67 P X2.16 (o indicate directional \337ow of the vector \336eld, a whole) 81.9 252.67 P X0.21 (family of continuous motion \336lters has been introduced. These \336l-) 54 242.67 P X0.67 (ters give apparent motion in the direction of the vector \336eld. The) 54 232.67 P X0.71 (technique can also be used to create special ef) 54 222.67 P X0.71 (fects. Additionally) 224.73 222.67 P X0.71 (,) 291.75 222.67 P X0.07 (the local nature of the algorithm lends itself to ef) 54 212.67 P X0.07 (\336cient and simple) 229.95 212.67 P X(implementations.) 54 202.67 T X0 F X(8. ACKNOWLEDGMENTS) 54 185.33 T X1 F X-0.11 (This work was performed under the auspices of the U.S. Depart-) 63 175 P X2.83 (ment of Ener) 54 165 P X2.83 (gy by Lawrence Livermore National Laboratory) 106.41 165 P X1.11 (under contract W) 54 155 P X1.11 (-7405-ENG-48. The SIGGRAPH \32493 reviewers) 118.11 155 P X0.14 (provided many helpful comments and suggestions. Thanks to Nel-) 54 145 P X0.29 (son Max who suggested using higher order functions within a cell) 54 135 P X1.77 (and who provided critical assessment all along the way) 54 125 P X1.77 (. Roger) 265.77 125 P X0.17 (Craw\336s deserves special thanks for various conversations over the) 54 115 P X1.31 (past couple of years on the topic of vector visualization. Chuck) 54 105 P X0.05 (Grant provided helpful suggestions clarifying the language used to) 54 95 P X0.34 (discuss periodic motion \336lters. John Bell and Jef) 54 85 P X0.34 (f Greenough pro-) 230.94 85 P X0.34 (vided the turbulent computational \337uid dynamics data used in \336g-) 54 75 P X0.14 (ures 2, 4, 8 and 1) 317.29 732 P X0.14 (1 and for using the algorithm in their work. Dean) 379.3 732 P X-0.06 (W) 317.29 722 P X-0.06 (illiams and Jerry Potter provided the North America wind veloc-) 325.41 722 P X-0.21 (ity data. Lastly) 317.29 712 P X-0.21 (, thanks to John Zych who helped with the rendering) 369.96 712 P X(of the North America image.) 317.29 702 T X0 F X(REFERENCES) 317.29 684.44 T X1 F X(1.) 317.29 673.88 T X0.98 (Bresenham, J. Algorithm for Computer Control of a Digital) 335.29 673.88 P X(Plotter) 335.29 663.88 T X(. 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V) 482.59 531.08 P X0.23 (olume Rendering.) 492.65 531.08 P X3 F X(Computer Graphics) 335.29 521.08 T X1 F X( 22, 4 \050August 1988\051, 65-74.) 406.93 521.08 T X(7.) 317.29 508.52 T X0.63 (Dumortier) 335.29 508.52 P X0.63 (, F) 372.37 508.52 P X0.63 (., Roussarie, R., Sotomayor) 381.77 508.52 P X0.63 (, J. and Zoladek, H.,) 482.14 508.52 P X1.34 (Study of Field Bifurcations.) 335.29 498.52 P X3 F X1.34 (Lectur) 443.26 498.52 P X1.34 (e Notes in Mathematics) 466.39 498.52 P X1 F X1.34 (,) 555.04 498.52 P X(Springer) 335.29 488.52 T X(-V) 366.06 488.52 T X(erlag \0501991\051.) 374.54 488.52 T X(8.) 317.29 475.96 T X1.85 (Freeman, W) 335.29 475.96 P X1.85 (., Adelson, E. and Heeger) 380.73 475.96 P X1.85 (, D. Motion without) 480.09 475.96 P X(Movement.) 335.29 465.96 T X3 F X(Computer Graphics) 378.72 465.96 T X1 F X( 25, 4 \050July 1991\051, 27-30.) 450.37 465.96 T X(9.) 317.29 453.4 T X0.94 (Haeberli, P) 335.29 453.4 P X0.94 (. 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A 3-D Streamline T) 335.29 385.72 P X0.33 (racking) 530.33 385.72 P X0.45 (Algorithm Using Dual Stream Functions.) 335.29 375.72 P X3 F X0.45 (IEEE V) 488.34 375.72 P X0.45 (isualization) 515.33 375.72 P X(\32492 Confer) 335.29 365.72 T X(ence Pr) 374.15 365.72 T X(oceedings) 401.51 365.72 T X1 F X( \050October 1992\051, 62-68.) 437.45 365.72 T X(13.) 317.29 353.16 T X(Max, Nelson. Personal Communication \0501992\051.) 335.29 353.16 T X(14.) 317.29 340.6 T X1.16 (Perlin, K. An Image Synthesizer) 335.29 340.6 P X1.16 (.) 456.27 340.6 P X3 F X1.16 (Computer Graphics) 461.92 340.6 P X1 F X1.16 ( 19, 3) 534.74 340.6 P X(\050August 1985\051, 287-296.) 335.29 330.6 T X(15.) 317.29 318.04 T X3.01 (Perlin, K. Hypertexture.) 335.29 318.04 P X3 F X3.01 (Computer Graphics) 433.17 318.04 P X1 F X3.01 ( 23, 3 \050July) 507.82 318.04 P X(1989\051, 253-262.) 335.29 308.04 T X(16.) 317.29 295.48 T X1.45 (Pratt, W) 335.29 295.48 P X1.45 (.) 365.87 295.48 P X3 F X1.45 (Digital Image Pr) 371.81 295.48 P X1.45 (ocessing) 435.8 295.48 P X1 F X1.45 (. 2nd ed. John W) 466.75 295.48 P X1.45 (iley &) 533.11 295.48 P X(Sons, Inc. \0501991\051, 243-245.) 335.29 285.48 T X(17.) 317.29 272.92 T X1.19 (Sims, K. Arti\336cial Evolution for Computer Graphics.) 335.29 272.92 P X3 F X1.19 (Com-) 537.32 272.92 P X(puter Graphics) 335.29 262.92 T X1 F X( 25, 4 \050August 1991\051, 319-328.) 389.96 262.92 T X(18.) 317.29 250.36 T X0.41 (Sims, K. Choreographed Image Flow) 335.29 250.36 P X0.41 (.) 470.66 250.36 P X3 F X0.41 (The Journal of V) 475.57 250.36 P X0.41 (isual-) 536.81 250.36 P X0.44 (ization and Computer Animation) 335.29 240.36 P X1 F X0.44 ( 3, 1 \050January-March 1992\051,) 454.7 240.36 P X(31-43.) 335.29 230.36 T X(19.) 317.29 217.8 T X2.17 (T) 335.29 217.8 P X2.17 (ufte, E. The V) 340.46 217.8 P X2.17 (isual Display of Quantitative Information.) 397.59 217.8 P X3 F X(Chesir) 335.29 207.8 T X(e, CT) 358.92 207.8 T X(: Graphics Pr) 377.9 207.8 T X(ess) 427.5 207.8 T X1 F X( \0501983\051.) 438.48 207.8 T X(20.) 317.29 195.24 T X1.79 (T) 335.29 195.24 P X1.79 (urk, G. Generating T) 340.46 195.24 P X1.79 (extures on Arbitrary Surfaces Using) 420.33 195.24 P X0.52 (Reaction-Dif) 335.29 185.24 P X0.52 (fusion T) 382.05 185.24 P X0.52 (extures.) 412.14 185.24 P X3 F X0.52 (Computer Graphics) 443.11 185.24 P X1 F X0.52 ( 25, 4 \050July) 515.28 185.24 P X(1991\051, 289-298.) 335.29 175.24 T X(21.) 317.29 162.68 T X0.55 (Upson, C. and Keeler) 335.29 162.68 P X0.55 (, M. V) 414.2 162.68 P X0.55 (-Buf) 437.94 162.68 P X0.55 (fer: V) 454.25 162.68 P X0.55 (isible V) 475.47 162.68 P X0.55 (olume Render-) 503.07 162.68 P X(ing.) 335.29 152.68 T X3 F X(Computer Graphics) 351.27 152.68 T X1 F X( 22, 4 \050August 1988\051, 59-64.) 422.91 152.68 T X(22.) 317.29 140.12 T X-0.05 (V) 335.29 140.12 P X-0.05 (an Gelder) 340.78 140.12 P X-0.05 (, A. and W) 375.55 140.12 P X-0.05 (ilhelms, J. Interactive Animated V) 414.24 140.12 P X-0.05 (isual-) 537.32 140.12 P X0.61 (ization of Flow Fields.) 335.29 130.12 P X3 F X0.61 (Pr) 421.36 130.12 P X0.61 (oceedings of the W) 430.01 130.12 P X0.61 (orkshop on V) 499.15 130.12 P X0.61 (ol-) 547.3 130.12 P X(ume V) 335.29 120.12 T X(isualization) 357.33 120.12 T X1 F X(, Kaufman and Lorensen Eds. \0501992\051.) 399.29 120.12 T X(23.) 317.29 107.56 T X-0.1 (V) 335.29 107.56 P X-0.1 (an W) 340.78 107.56 P X-0.1 (ijk, J. Spot Noise T) 359.54 107.56 P X-0.1 (exture Synthesis for Data V) 427.92 107.56 P X-0.1 (isualiza-) 526.84 107.56 P X(tion.) 335.29 97.56 T X3 F X(Computer Graphics) 353.76 97.56 T X1 F X( 25, 4 \050July 1991\051, 309-318.) 425.41 97.56 T X(24.) 317.29 85 T X0.78 (W) 335.29 85 P X0.78 (itkin, A. and Kass, M. Reaction-Dif) 343.41 85 P X0.78 (fusion T) 475.72 85 P X0.78 (extures.) 506.08 85 P X3 F X0.78 (Com-) 537.32 85 P X(puter Graphics) 335.29 75 T X1 F X(25, 4 \050July 1991\051, 299-308.) 392.2 75 T XFMENDPAGE X%%EndPage: "8" 9 X%%Trailer X%%BoundingBox: 0 0 612 792 X%%Pages: 8 1 X%%DocumentFonts: Helvetica-Bold X%%+ Times-Roman X%%+ Times-Bold X%%+ Times-Italic X%%+ Symbol X%%+ AvantGarde-Book X%%+ AvantGarde-BookOblique X%%+ AvantGarde-DemiOblique END_OF_FILE if test 61490 -ne `wc -c <'lic.1.2/doc/siggraph93/paper.ps.C'`; then echo shar: \"'lic.1.2/doc/siggraph93/paper.ps.C'\" unpacked with wrong size! elif test -f 'lic.1.2/doc/siggraph93/paper.ps.A' && test -f 'lic.1.2/doc/siggraph93/paper.ps.B'; then echo shar: Combining \"'lic.1.2/doc/siggraph93/paper.ps'\" $170079 characters$ cat 'lic.1.2/doc/siggraph93/paper.ps.A' 'lic.1.2/doc/siggraph93/paper.ps.B' 'lic.1.2/doc/siggraph93/paper.ps.C' > 'lic.1.2/doc/siggraph93/paper.ps' if test 170079 -ne `wc -c <'lic.1.2/doc/siggraph93/paper.ps'`; then echo shar: \"'lic.1.2/doc/siggraph93/paper.ps'\" combined with wrong size! else rm lic.1.2/doc/siggraph93/paper.ps.A lic.1.2/doc/siggraph93/paper.ps.B lic.1.2/doc/siggraph93/paper.ps.C fi fi # end of 'lic.1.2/doc/siggraph93/paper.ps.C' fi echo shar: End of archive 2 $of 10$. cp /dev/null ark2isdone MISSING="" for I in 1 2 3 4 5 6 7 8 9 10 ; do if test ! -f ark${I}isdone ; then MISSING="${MISSING} ${I}" fi done if test "${MISSING}" = "" ; then echo You have unpacked all 10 archives. rm -f ark[1-9]isdone ark[1-9][0-9]isdone else echo You still must unpack the following archives: echo " " ${MISSING} fi exit 0 exit 0 # Just in case...