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1	% shadow.bib: bibliography on shadow algorithms,
2	% direct illumination,
3	% area light sources,
4	% soft shadows,
5	% texture mapping on graphics workstations,
6	% and related topics including hemicubes and form factor calculation.
7	%
8	% Paul Heckbert, January 1997
9	%
10	% many entries copied from the CS bibliography at
11	% http://liinwww.ira.uka.de/bibliography/index.html
12
13	@INPROCEEDINGS{Herf96sketch,
14	AUTHOR={Michael Herf and Paul S. Heckbert},
15	TITLE={Fast Soft Shadows},
16	BOOKTITLE={Visual Proceedings, SIGGRAPH 96},
17	MONTH={Aug.},
18	YEAR={1996},
19	PAGES={145},
20	KEYWORDS={penumbra, graphics workstation, accumulation buffer, texture mapping},
21	}
22
23	@TECHREPORT{Heckbert97shadow,
24	AUTHOR={Paul S. Heckbert and Michael Herf},
25	TITLE={Simulating Soft Shadows with Graphics Hardware},
26	INSTITUTION={CS Dept., Carnegie Mellon U.},
27	MONTH={Jan.},
28	YEAR=1997,
29	NOTE={CMU-CS-97-104, http://www.cs.cmu.edu/~ph},
30	KEYWORDS={penumbra, texture mapping, graphics workstation,
31	interaction, real-time, SGI Reality Engine},
32	}
33
34	@MISC{Herf97shadow,
35	AUTHOR={Michael Herf and Paul S. Heckbert},
36	TITLE={Soft Shadow Textures},
37	NOTE={Submitted for publication},
38	YEAR=1997,
39	}
40
41	@INPROCEEDINGS{Nishita83,
42	AUTHOR={Tomoyuki Nishita and Eihachiro Nakamae},
43	TITLE={Half-Tone Representation of 3-{D} Objects Illuminated by Area Sources
44	or Polyhedron Sources},
45	BOOKTITLE={COMPSAC '83, Proc. IEEE 7th Intl. Comp. Soft.
46	and Applications Conf.},
47	MONTH={Nov.},
48	YEAR={1983},
49	PAGES={237-242},
50	KEYWORDS={shading, shadow, penumbra},
51	}
52
53	@INPROCEEDINGS{Nakamae84,
54	AUTHOR={Eihachiro Nakamae and Hideo Yamashita and Kohichi Harada and Tomoyuki Nishita},
55	TITLE={Computer Graphics for Visualizing Simulation Results},
56	BOOKTITLE={Eurographics '84},
57	MONTH={Sept.},
58	YEAR={1984},
59	PAGES={419-432},
60	KEYWORDS={shadow, penumbra},
61	}
62
63	@ARTICLE{Nishita85,
64	AUTHOR={Tomoyuki Nishita and Eihachiro Nakamae},
65	TITLE={Continuous Tone Representation of 3-{D} Objects Taking Account of
66	Shadows and Interreflection},
67	JOURNAL={Computer Graphics
68	(SIGGRAPH '85 Proceedings)},
69	VOLUME={19},
70	NUMBER={3},
71	MONTH={July},
72	YEAR={1985},
73	PAGES={23-30},
74	KEYWORDS={shading, penumbra, radiosity},
75	}
76
77	@TECHREPORT{Campbell91tr1,
78	AUTHOR={Campbell, III, A. T. and Donald S. Fussell},
79	TITLE={Analytic Illumination with Polygonal Light Sources},
80	NOTE={TR-91-15},
81	INSTITUTION={CS Dept, U of Texas at Austin},
82	MONTH={April},
83	YEAR={1991},
84	KEYWORDS={shadow},
85	ANNOTE={object space shadow algorithm, like Nishita83},
86	}
87
88	@TECHREPORT{Campbell91tr2,
89	AUTHOR={Campbell, III, A. T. and Donald S. Fussell},
90	TITLE={An Analytic Approach to Illumination with Area Light Sources},
91	NOTE={TR-91-25},
92	INSTITUTION={CS Dept, U of Texas at Austin},
93	MONTH={August},
94	YEAR={1991},
95	KEYWORDS={shadow},
96	ANNOTE={An early draft of chapters 5 and 6 of his dissertation},
97	}
98
99	@MastersThesis{Woo89,
100	author = "Andrew C. H. Woo",
101	title = "Accelerators for Shadow Determination in Ray Tracing",
102	pages = "136",
103	month = feb,
104	year = "1989",
105	school = "Department of Computer Science, University of
106	Toronto",
107	keywords = "ray tracing, regular grid subdivision, voxel, shadow,
108	efficiency, cull",
109	}
110
111	@InProceedings{Woo90voxel,
112	author = "Andrew Woo and John Amanatides",
113	title = "Voxel Occlusion Testing: {A} Shadow Determination
114	Accelerator for Ray Tracing",
115	pages = "213--220",
116	booktitle = "Proceedings of Graphics Interface '90",
117	year = "1990",
118	month = may,
119	conference = "Halifax, Canada",
120	keywords = "grid, intersection culling, occlusion, penumbra, ray
121	tracing, shadows, umbra, voxel traversal",
122	abstract = "
123	A shadow determination accelerator for ray tracing is
124	presented. It is built on top of the uniform voxel
125	traversal grid structure. The accelerator proves to be
126	rather efficient, requires little additional memory and
127	the worst case scenario per shadow determination just
128	reduces down to traditional voxel traversal. It can
129	also be extended to model linear, area lights, as well
130	as atmospheric shadows.
131	",
132	}
133
134	@ARTICLE{Woo90survey,
135	AUTHOR={Andrew Woo and Pierre Poulin and Alain Fournier},
136	TITLE={A Survey of Shadow Algorithms},
137	JOURNAL={IEEE Computer Graphics and Applications},
138	VOLUME={10},
139	NUMBER={6},
140	MONTH={Nov.},
141	YEAR={1990},
142	PAGES={13-32},
143	ABSTRACT={
144	Essential to realistic and visually appealing images,
145	shadows are difficult to compute in most display
146	environments. This survey characterizes the various
147	types of shadows. It also describes most existing
148	shadow algorithms and discusses their complexities,
149	advantages, and shortcomings. We examine hard shadows,
150	soft shadows, shadows of transparent objects, and
151	shadows for complex modeling primitives. For each type,
152	we examine shadow algorithms within various rendering
153	techniques. This survey attempts to provide readers
154	with enough background and insight on the various
155	methods to allow them to choose the algorithm best
156	suited to their needs. We also hope that our analysis
157	will help identify the areas that need more research
158	and point to possible solutions.
159	},
160	}
161
162	@INCOLLECTION{Woo92,
163	AUTHOR={Andrew Woo},
164	TITLE={The Shadow Depth Map Revisited},
165	BOOKTITLE={Graphics Gems III},
166	EDITOR={David Kirk},
167	PUBLISHER={Academic Press},
168	ADDRESS={Boston, MA},
169	YEAR={1992},
170	PAGES={338-342, 582},
171	KEYWORDS={z-buffer shadow, aliasing},
172	annote = "includes code",
173	}
174
175	@Article{Woo93,
176	author = "Andrew Woo",
177	title = "Efficient shadow computations in ray tracing",
178	journal = "IEEE Computer Graphics and Applications",
179	pages = "78--83",
180	volume = "13",
181	number = "5",
182	month = sep,
183	year = "1993",
184	annote = "Two simple techniques speed up shadows in ray tracing.
185	Both require little memory and easily extend to other
186	ray types. One can also benefit radiosity-related
187	computations.",
188	}
189
190	@InProceedings{Poulin90shadow,
191	author = "Pierre Poulin and John Amanatides",
192	title = "Shading and Shadowing with Linear Light Sources",
193	pages = "377--386",
194	booktitle = "Eurographics '90",
195	year = "1990",
196	month = sep,
197	publisher = "North-Holland",
198	keywords = "soft shadow",
199	}
200
201
202	@ARTICLE{Bao93,
203	AUTHOR={Hujun Bao and Qunsheng Peng},
204	TITLE={Shading Models for Linear and Area Light Sources},
205	JOURNAL={Computers and Graphics},
206	VOLUME={17},
207	NUMBER={2},
208	YEAR={1993},
209	PAGES={137-145},
210	KEYWORDS={shadow, penumbra},
211	}
212
213	@INPROCEEDINGS{Vedel93,
214	AUTHOR={Christophe Vedel},
215	TITLE={Computing Illumination from Area Light Sources by Approximate Contour
216	Integration},
217	BOOKTITLE={Proc. Graphics Interface '93},
218	PUBLISHER={Canadian Inf. Proc. Soc.},
219	ADDRESS={Toronto, Ontario},
220	MONTH={May},
221	YEAR={1993},
222	PAGES={237-244},
223	KEYWORDS={shadow, penumbra},
224	}
225
226	@InProceedings{Chin90,
227	AUTHOR={Norman Chin and Steven Feiner},
228	TITLE={Near Real-Time Shadow Generation Using {BSP} Trees},
229	booktitle={Proceedings of SIGGRAPH '90},
230	MONTH={Aug.},
231	YEAR={1990},
232	PAGES={99-106},
233	}
234
235	@INPROCEEDINGS{Chin92,
236	AUTHOR={Norman Chin and Steven Feiner},
237	TITLE={Fast Object-Precision Shadow Generation for Area Light Sources using
238	{BSP} Trees},
239	BOOKTITLE={1992 Symp. on Interactive 3D Graphics},
240	PUBLISHER={ACM SIGGRAPH},
241	MONTH={Mar.},
242	YEAR={1992},
243	PAGES={21-30},
244	}
245
246	@TechReport{Chin90t,
247	author = "Norman Chin",
248	title = "Near Real-Time Object-Precision Shadow Generation
249	Using {BSP} Trees---Master Thesis",
250	institution = "University of Columbia",
251	number = "CUCS-068-90",
252	year = "1990",
253	abstract = "This master's thesis describes an object-precision
254	shadow generation algorithm for static polygonal
255	environments illuminated by movable point light
256	sources. The algorithm can be easily implemented on any
257	graphics system that provides fast polygon
258	scan-conversion and achieves near real-time performance
259	for environments of modest size. It combines elements
260	of two kinds of current shadow generation algorithms:
261	two-pass object-precision approaches and shadow volume
262	approaches. This algorithm is an example of a new
263	paradigm for shadow generation. Previously, the
264	shadowing the problem can be viewed as solving the
265	visible-surface problem from the point of view of a
266	point light source. Another way to look at them, is
267	from a geometric modeling point of view. By creating
268	shadow volumes and then classifying polygons
269	analytically against it, shadows can also be computed.
270	Several optimizations are discussed. A way of reducing
271	the amount of polygon fragmentation is shown by
272	coalescing the fragments on the fly. Two methods of
273	parallelizing the algorithm is presented. One method
274	determines shadow fragments in parallel for a given
275	light source. And more importantly, a method to handle
276	shadowing from multiple point light sources independent
277	of the number of light sources on workstations with
278	alpha blending capabilities is described. Finally this
279	algorithm has been extended to generate soft shadows by
280	modeling area light sources. By initially meshing the
281	scene into penumbra/umbra regions, and by adaptively
282	meshing the penumbra regions with concentric contours
283	similiar in shape to the outer penumbra region and by
284	applying the point light source shadow algorithm to
285	compute what fraction of an area light source is seen
286	by a point to be rendered in the interior of the
287	penumbra region and finally, by smooth shading the
288	results, fuzzy shadows can be rendered. The future work
289	section talks about combining all of the above to
290	produce higher quality shadows in radiosity
291	environments through adaptive meshing of the scene
292	along penumbra/umbra boundaries via the area light
293	source shadow algorithm and through analytically
294	computing form-factors via the point light source
295	shadow algorithm. Pseudocode is provided along with
296	pictures and timings from an interactive
297	implementation.",
298	}
299
300	@InProceedings{Fuchs80,
301	AUTHOR={Henry Fuchs and Zvi M. Kedem and Bruce F. Naylor},
302	TITLE={On Visible Surface Generation by A Priori Tree Structures},
303	booktitle={Proceedings of SIGGRAPH '80},
304	MONTH={July},
305	YEAR={1980},
306	PAGES={124-133},
307	KEYWORDS={hidden surface, BSP tree},
308	}
309
310	@ARTICLE{Brotman84,
311	AUTHOR={Lynne Shapiro Brotman and Norman I. Badler},
312	TITLE={Generating Soft Shadows with a Depth Buffer Algorithm},
313	JOURNAL={IEEE Computer Graphics and Applications},
314	VOLUME={4},
315	NUMBER={10},
316	MONTH={Oct.},
317	YEAR={1984},
318	PAGES={5-24},
319	}
320
321	@ARTICLE{Crow77,
322	AUTHOR={Franklin C. Crow},
323	TITLE={Shadow Algorithms for Computer Graphics},
324	JOURNAL={Computer Graphics
325	(SIGGRAPH '77 Proceedings)},
326	VOLUME={11},
327	NUMBER={2},
328	MONTH={Summer},
329	YEAR={1977},
330	}
331
332	@INPROCEEDINGS{Meyer90,
333	AUTHOR={U. Meyer},
334	TITLE={Hemi-Cube Ray Tracing: A Method for Generating Soft Shadows},
335	BOOKTITLE={Eurographics '90},
336	PAGES={365-376},
337	}
338
339	@ARTICLE{Williams78,
340	AUTHOR={Lance Williams},
341	TITLE={Casting Curved Shadows on Curved Surfaces},
342	JOURNAL={Computer Graphics
343	(SIGGRAPH '78 Proceedings)},
344	VOLUME={12},
345	NUMBER={3},
346	MONTH={Aug.},
347	YEAR={1978},
348	PAGES={270-274},
349	}
350
351	@ARTICLE{Reeves87,
352	AUTHOR={William T. Reeves and David H. Salesin and Robert L. Cook},
353	TITLE={Rendering Antialiased Shadows with Depth Maps},
354	JOURNAL={Computer Graphics
355	(SIGGRAPH '87 Proceedings)},
356	VOLUME={21},
357	NUMBER={4},
358	MONTH={July},
359	YEAR={1987},
360	PAGES={283-291},
361	}
362
363	@ARTICLE{Atherton78,
364	AUTHOR={Peter R. Atherton and Kevin Weiler and Donald P. Greenberg},
365	TITLE={Polygon Shadow Generation},
366	JOURNAL={Computer Graphics
367	(SIGGRAPH '78 Proceedings)},
368	VOLUME={12},
369	NUMBER={3},
370	MONTH={Aug.},
371	YEAR={1978},
372	PAGES={275-281},
373	KEYWORDS={hidden surface},
374	}
375
376	@ARTICLE{Heckbert86,
377	AUTHOR={Paul S. Heckbert},
378	TITLE={Survey of Texture Mapping},
379	JOURNAL={IEEE Computer Graphics and Applications},
380	VOLUME={6},
381	NUMBER={11},
382	MONTH={Nov.},
383	YEAR={1986},
384	PAGES={56-67},
385	}
386
387	@ARTICLE{Heckbert90,
388	AUTHOR={Paul S. Heckbert},
389	TITLE={Adaptive Radiosity Textures for Bidirectional Ray Tracing},
390	JOURNAL={Computer Graphics
391	(SIGGRAPH '90 Proceedings)},
392	VOLUME={24},
393	NUMBER={4},
394	MONTH={Aug.},
395	YEAR={1990},
396	PAGES={145-154},
397	KEYWORDS={global illumination},
398	}
399
400	@PHDTHESIS{Heckbert91,
401	AUTHOR={Paul S. Heckbert},
402	TITLE={Simulating Global Illumination Using Adaptive Meshing},
403	SCHOOL={CS Division, UC Berkeley},
404	MONTH={June},
405	YEAR={1991},
406	NOTE={Tech. Report UCB/CSD 91/636},
407	KEYWORDS={radiosity, ray tracing, adaptive mesh, integral equation,
408	thermal radiation, visibility},
409	}
410
411	@ARTICLE{Diefenbach94,
412	AUTHOR={Paul J. Diefenbach and Norman I. Badler},
413	TITLE={Pipeline Rendering: Interactive Refractions, Reflections, and Shadows},
414	JOURNAL={Displays},
415	ANNOTE={Special issue on Interactive Computer Graphics},
416	NOTE={http://www.cis.upenn.edu/~diefenba/home.html},
417	VOLUME={15},
418	NUMBER={3},
419	YEAR={1994},
420	PAGES={173-180},
421	KEYWORDS={beam tracing, hardware, real time},
422	}
423
424	@PHDTHESIS{Diefenbach96,
425	AUTHOR={Paul J. Diefenbach},
426	TITLE={Pipeline Rendering: Interaction and Realism through Hardware-Based
427	Multi-Pass Rendering},
428	SCHOOL={U. of Pennsylvania},
429	YEAR=1996,
430	KEYWORDS={beam tracing, hardware, real time, Phong illumination},
431	NOTE={http://www.cis.upenn.edu/~diefenba/home.html},
432	}
433
434	@INPROCEEDINGS{Diefenbach97inter,
435	AUTHOR={Paul J. Diefenbach and Norman I. Badler},
436	title={Multi-pass Pipeline Rendering: Realism for Dynamic Environments},
437	BOOKTITLE={1997 Symposium on Interactive 3D Graphics},
438	publisher={ACM SIGGRAPH},
439	YEAR=1997,
440	KEYWORDS={texture mapping},
441	NOTE={To appear},
442	}
443
444	@InProceedings{Cohen85,
445	AUTHOR={Michael F. Cohen and Donald P. Greenberg},
446	TITLE={The Hemi-Cube: A Radiosity Solution for Complex Environments},
447	JOURNAL={Computer Graphics (SIGGRAPH '85 Proceedings)},
448	MONTH={July},
449	YEAR={1985},
450	PAGES={31-40},
451	KEYWORDS={shading, diffuse reflection},
452	}
453
454	@ARTICLE{Cohen88,
455	AUTHOR={Michael F. Cohen and Shenchang Eric Chen and John R. Wallace and Donald P. Greenberg},
456	TITLE={A Progressive Refinement Approach to Fast Radiosity Image Generation},
457	JOURNAL={Computer Graphics
458	(SIGGRAPH '88 Proceedings)},
459	VOLUME={22},
460	NUMBER={4},
461	MONTH={Aug.},
462	YEAR={1988},
463	PAGES={75-84},
464	ANNOTE={progressive radiosity},
465	}
466
467	@BOOK{Cohen93,
468	AUTHOR={Michael F. Cohen and John R. Wallace},
469	TITLE={Radiosity and Realistic Image Synthesis},
470	PUBLISHER={Academic Press},
471	ADDRESS={Boston},
472	YEAR={1993},
473	}
474
475	@ARTICLE{Cook86,
476	AUTHOR={Robert L. Cook},
477	TITLE={Stochastic Sampling in Computer Graphics},
478	JOURNAL={ACM Trans. on Graphics},
479	VOLUME={5},
480	NUMBER={1},
481	MONTH={Jan.},
482	YEAR={1986},
483	PAGES={51-72},
484	KEYWORDS={ray tracing, antialiasing, motion blur},
485	ANNOTE={came out 1987},
486	}
487
488	@ARTICLE{Baum91,
489	AUTHOR={Daniel R. Baum and Stephen Mann and Kevin P. Smith and James M. Winget},
490	TITLE={Making Radiosity Usable: Automatic Preprocessing and Meshing Techniques
491	for the Generation of Accurate Radiosity Solutions},
492	MONTH={July},
493	YEAR={1991},
494	JOURNAL={Computer Graphics
495	(SIGGRAPH '91 Proceedings)},
496	VOLUME={25},
497	NUMBER={4},
498	PAGES={51-60},
499	KEYWORDS={mesh generation},
500	}
501
502	@ARTICLE{Hanrahan91,
503	AUTHOR={Pat Hanrahan and David Salzman and Larry Aupperle},
504	TITLE={A Rapid Hierarchical Radiosity Algorithm},
505	MONTH={July},
506	YEAR={1991},
507	JOURNAL={Computer Graphics
508	(SIGGRAPH '91 Proceedings)},
509	VOLUME={25},
510	NUMBER={4},
511	PAGES={197-206},
512	ANNOTE={adaptive sampling of kernel in quadtree-like fashion
513	motivated by Greengard's fast n-body algorithm},
514	}
515
516	@INPROCEEDINGS{Heckbert92discon,
517	AUTHOR={Paul S. Heckbert},
518	TITLE={Discontinuity Meshing for Radiosity},
519	BOOKTITLE={Third Eurographics Workshop on Rendering},
520	MONTH={May},
521	YEAR={1992},
522	ADDRESS={Bristol, UK},
523	PAGES={203-216},
524	KEYWORDS={radiosity, adaptive mesh, visibility},
525	}
526
527	@ARTICLE{Lischinski92,
528	AUTHOR={Dani Lischinski and Filippo Tampieri and Donald P. Greenberg},
529	TITLE={Discontinuity Meshing for Accurate Radiosity},
530	JOURNAL={IEEE Computer Graphics and Applications},
531	VOLUME={12},
532	NUMBER={6},
533	MONTH={November},
534	YEAR={1992},
535	PAGES={25-39},
536	}
537
538	@PHDTHESIS{Campbell91,
539	AUTHOR = {Campbell, III, A. T.},
540	TITLE = "Modeling Global Diffuse Illumination for Image Synthesis",
541	SCHOOL = "CS Dept, University of Texas at Austin",
542	YEAR = 1991,
543	MONTH = {Dec.},
544	NOTE = {Tech. Report TR-91-39},
545	keywords = {mesh generation, radiosity, penumbra, shadow},
546	pages = "155",
547	keywords = "Computational geometry data structure diffuse global
548	illumination mesh generation optimization penumbra
549	radiosity sampling shadow.",
550	abstract = "Rapid developments in the design of algorithms for
551	rendering globally illuminated scenes have taken place
552	in the past five years. Net energy methods such as
553	radiosity algorithms have become effective at
554	computing the energy balance for scenes containing
555	diffusely reflecting objects. Such methods first break
556	up a scene description into a large set of elements, or
557	possibly several levels of elements. Energy transfers
558	among these elements are then determined using a
559	variety of means. While much progress has been made in
560	the design of energy transfer algorithms, little or no
561	attention has been paid to the proper generation of the
562	mesh of surface elements. This dissertation presents a
563	technique for adaptively creating a mesh of surface
564	elements as the energy transfers are computed. The
565	method allows large numbers of small elements to be
566	placed at parts of the scene where the most active
567	energy transfers occur without requiring that other
568	parts of the scene be subdivided needlessly to the same
569	degree. As a result, the computational effort in the
570	energy transfer computations can be concentrated where
571	it has the most effect. Since the sources of direct and
572	indirect illumination in the scene are polygonal
573	elements, the effects of light sources with finite area
574	must be computed. Most methods simplify the problem by
575	approximating the area source with a collection of
576	point sources. We present an object space algorithm to
577	model illumination from polygonal light sources
578	analytically. The result is a collection of
579	smooth-shaded polygonal facets that may be rendered
580	from any viewing position. Binary Space Partitioning
581	trees are used to compute umbra and penumbra boundaries
582	efficiently. Fast analytic techniques are developed
583	for illumination calculations. Numerical optimization
584	methods ensure that the shading function is sampled
585	finely enough to find all significant illumination
586	gradations. Illumination calculations are optimized to
587	concentrate computational effort on parts of the scene
588	where they are most needed.",
589	note = "price (\$5.00)",
590	}
591
592
593
594	@ARTICLE{Ward88,
595	AUTHOR={Gregory J. Ward and Francis M. Rubinstein and Robert D. Clear},
596	TITLE={A Ray Tracing Solution for Diffuse Interreflection},
597	JOURNAL={Computer Graphics
598	(SIGGRAPH '88 Proceedings)},
599	VOLUME={22},
600	NUMBER={4},
601	MONTH={Aug.},
602	YEAR={1988},
603	PAGES={85-92},
604	ANNOTE={cache diffuse samples},
605	}
606
607	@InProceedings{ward91a,
608	author = "Gregory Ward",
609	title = "Adaptive shadow testing for ray tracing",
610	booktitle = "Eurographics Workshop on Rendering",
611	month = "May",
612	year = "1991",
613	conference = "Barcelona",
614	pages = "11--20",
615	keywords = "efficiency",
616	abstract = "Method for reducing the number of shadow rays for
617	scenes with a large number of light sources. The
618	sources are sorted on their contribution, and only for
619	the most important sources rays are cast. The influence
620	of the other sources is estimated statistically. Tests
621	are done with different tolerances (threshold to
622	determine whether sources are important) and
623	certainties (rate of accuracy). The method gives good
624	reduction and is able to find the most important
625	shadows because it selects contrast as criterion.",
626	annote = "avoid shooting rays at lights determined to not affect
627	perception of image",
628	}
629
630	@TECHREPORT{Garland95tr,
631	AUTHOR={Michael Garland and Paul S. Heckbert},
632	TITLE={Fast Polygonal Approximation of Terrains and Height Fields},
633	INSTITUTION={CS Dept., Carnegie Mellon U.},
634	MONTH={Sept.},
635	YEAR={1995},
636	NOTE={CMU-CS-95-181, http://www.cs.cmu.edu/~garland/scape},
637	KEYWORDS={surface simplification, Delaunay triangulation,
638	data-dependent triangulation, triangulated irregular network, TIN,
639	multiresolution modeling, greedy insertion},
640	}
641
642	@ARTICLE{Blinn88,
643	AUTHOR={James F. Blinn},
644	TITLE={Me and My (Fake) Shadow},
645	JOURNAL={IEEE Computer Graphics and Applications},
646	VOLUME={8},
647	NUMBER={1},
648	MONTH={Jan.},
649	YEAR={1988},
650	PAGES={82-86},
651	KEYWORDS={projection, homogeneous matrix},
652	}
653
654	@ARTICLE{Heidmann91,
655	AUTHOR={Tim Heidmann},
656	TITLE={Real Shadows, Real Time},
657	JOURNAL={Iris Universe},
658	NOTE={Silicon Graphics, Inc.},
659	VOLUME={18},
660	YEAR={1991},
661	PAGES={28-31},
662	KEYWORDS={soft shadow, SGI Reality Engine, stencil buffer, shadow volume},
663	ANNOTE={includes C, GL code},
664	}
665
666	@PHDTHESIS{Grant92,
667	AUTHOR={Charles W. Grant},
668	TITLE={Visibility Algorithms in Image Synthesis},
669	SCHOOL={U. of California, Davis},
670	YEAR={1992},
671	KEYWORDS={z buffer, ray tracing, shadow, taxonomy},
672	annote={partial electronic version available from grant1@llnl.gov,
673	A successor to Sutherland-Sproull-Schumacker, Comput. Surv. 74},
674	}
675
676	@ARTICLE{Tessman89,
677	AUTHOR={Thant Tessman},
678	TITLE={Casting Shadows on Flat Surfaces},
679	JOURNAL={Iris Universe},
680	NOTE={Silicon Graphics, Inc.},
681	MONTH={Winter},
682	YEAR={1989},
683	PAGES={16-19},
684	KEYWORDS={projection, homogeneous matrix},
685	ANNOTE={includes C, GL code},
686	}
687
688	@BOOK{Neider93,
689	AUTHOR={Jackie Neider and Tom Davis and Mason Woo},
690	TITLE={{OpenGL} Programming Guide},
691	PUBLISHER={Addison-Wesley},
692	ADDRESS={Reading MA},
693	YEAR={1993},
694	KEYWORDS={computer graphics, graphics workstation, SGI},
695	ANNOTE={shadows on a plane p. 401},
696	}
697
698	@BOOK{McReynolds96,
699	editor={Tom McReynolds},
700	title={Programming with {OpenGL}: Advanced Rendering},
701	note={SIGGRAPH '96 course notes},
702	year=1996,
703	keywords={Silicon Graphics, graphics workstation,
704	texture mapping, stencil buffer, accumulation buffer, shadow},
705	annote={article and code at
706	http://www.sgi.com/Technology/openGL/advanced_sig96.html},
707	}
708
709	@INPROCEEDINGS{Akeley93,
710	AUTHOR={Kurt Akeley},
711	TITLE={{RealityEngine} Graphics},
712	BOOKTITLE={SIGGRAPH '93 Proc.},
713	MONTH={Aug.},
714	YEAR={1993},
715	PAGES={109-116},
716	KEYWORDS={hardware, texture mapping, graphics workstation, SGI},
717	}
718
719	@ARTICLE{Clark76,
720	AUTHOR={James H. Clark},
721	TITLE={Hierarchical Geometric Models for Visible Surface Algorithms},
722	JOURNAL={CACM},
723	VOLUME={19},
724	NUMBER={10},
725	MONTH={Oct.},
726	YEAR={1976},
727	PAGES={547-554},
728	KEYWORDS={bounding volume, spatial data structure},
729	}
730
731	@ARTICLE{Haeberli90accum,
732	AUTHOR={Paul Haeberli and Kurt Akeley},
733	TITLE={The Accumulation Buffer: Hardware Support for High-Quality Rendering},
734	JOURNAL={Computer Graphics (SIGGRAPH '90 Proceedings)},
735	VOLUME={24},
736	NUMBER={4},
737	MONTH={Aug.},
738	YEAR={1990},
739	PAGES={309-318},
740	KEYWORDS={antialiasing, motion blur, depth of field,
741	soft shadows, stochastic sampling},
742	}
743
744	@ARTICLE{Segal92,
745	AUTHOR={Mark Segal and Carl Korobkin and Rolf van Widenfelt and Jim Foran
746	and Paul Haeberli},
747	TITLE={Fast Shadows and Lighting Effects using Texture Mapping},
748	JOURNAL={Computer Graphics (SIGGRAPH '92 Proceedings)},
749	VOLUME={26},
750	NUMBER={2},
751	MONTH={July},
752	YEAR={1992},
753	PAGES={249-252},
754	KEYWORDS={perspective, scan conversion},
755	}
756
757	@ARTICLE{Chen90,
758	author = "Shenchang Eric Chen",
759	title = "Incremental Radiosity: An Extension of Progressive
760	Radiosity to an Interactive Image Synthesis System",
761	pages = "135-144",
762	journal = "Computer Graphics (SIGGRAPH '90 Proceedings)",
763	volume = "24",
764	number = "4",
765	year = "1990",
766	month = "August",
767	keywords = "animation",
768	}
769
770	@InCollection{Chen91prograd,
771	author = "Shenchang Eric Chen",
772	editor = "James Arvo",
773	title = "Implementing Progressive Radiosity with User-Provided
774	Polygon Display Routines",
775	booktitle = "Graphics Gems II",
776	pages = "295-298, 583-597",
777	publisher = "Academic Press Professional",
778	address = "Boston, MA",
779	year = "1991",
780	note = "includes code",
781	}
782
783	@Article{george90a,
784	author = "David W. George and Francois X. Sillion and Donald P.
785	Greenberg",
786	title = "Radiosity Redistribution for Dynamic Environments",
787	journal = "IEEE Computer Graphics and Applications",
788	pages = "26--34",
789	volume = "10",
790	number = "4",
791	month = jul,
792	year = "1990",
793	keywords = "radiosity, animation, interaction, shadow, negative
794	radiosity",
795	annote = "They present a modification to the progressive
796	radiosity to allow faster radiosity computation for
797	animation sequences where objects can be added, moved,
798	removed or their surface changed properties. When an
799	object is added, radiosity is shot onto these new
800	patches. A shadow volume is determined and a negative
801	radiosity is shot to the patches in shadow. When an
802	object is moved, it is removed from the scene and added
803	to the new position, the radiosity being recomputed at
804	each step. The radiosity recomputed is based on two
805	strategies: redistribute first or interleave
806	redistribution and propagation. Some heuristics are
807	presented to choose the most important patches. This
808	solution is good when just a few objects are involved
809	but as the complexity of the scenes and mostly moving
810	objects increases, the algorithm lost of its
811	interest.",
812	}
813
814	@INCOLLECTION{Sillion91shadow,
815	AUTHOR={Francois Sillion},
816	TITLE={Detection of Shadow Boundaries for Adaptive Meshing in Radiosity},
817	EDITOR={James Arvo},
818	BOOKTITLE={Graphics Gems II},
819	PAGES={311-315},
820	PUBLISHER={Academic Press},
821	ADDRESS={Boston MA},
822	YEAR={1991},
823	KEYWORDS={discontinuity meshing},
824	}
825
826	@Article{haines86a,
827	author = "Eric A. Haines and Donald P. Greenberg",
828	title = "The Light Buffer: {A} Ray Tracer Shadow Testing
829	Accelerator",
830	pages = "6--16",
831	journal = "IEEE Computer Graphics and Applications",
832	volume = "6",
833	number = "9",
834	year = "1986",
835	month = sep,
836	keywords = "shading, ray tracing, shadows, ray tracing shadow
837	cull",
838	abstract = "In one area of computer graphics, realistic image
839	synthesis, the ultimate goal is to produce a picture
840	indistinguishable from a photograph of a real
841	environment. A particularly powerful technique for
842	simulating light reflection---an important element in
843	creating this realism---is called ray tracing. This
844	method produces images of excellent quality, but
845	suffers from lengthy computation time that limits its
846	practical use. \\ This article presents a new method to
847	reduce shadow testing time during ray tracing. The
848	technique involves generating light buffers, each of
849	which partition the environment with respect to an
850	individual light source. These partition descriptions
851	are then used during shadow testing to quickly
852	determine a small subset of objects that may have to be
853	tested for intersection. \\ The results of timing tests
854	illustrate the beneficial performance of these
855	techniques. The tests compare the standard ray-tracing
856	algorithm to light buffers of varying resolution.",
857	}
858
859
860	@InProceedings{bouville88a,
861	author = "C. Bouville and J. L. Dubois and I. Marchal and M. L.
862	Viaud",
863	title = "Monte-Carlo integration applied to an illumination
864	model",
865	pages = "483--498",
866	booktitle = "Eurographics '88",
867	year = "1988",
868	month = sep,
869	editor = "D. A. Duce and P. Jancene",
870	publisher = "North-Holland",
871	conference = "European Computer Graphics Conference and Exhibition;
872	held in Nice, France; 12 -- 16 September 1988",
873	keywords = "illumination model",
874	abstract = "The use of Monte-Carlo integration together with
875	stochastic sampling is very useful for dealing with the
876	scattering phenomena that occur in the propagation and
877	reflection of light. In this paper, these techniques
878	have been applied to the implementation of a
879	physics-based global illumination model. The
880	theoretical basis of this approach is presented briefly
881	and various applications to realistic image are then
882	described. This concerns the rendering of penumbra and
883	scattered reflection effects, antialiasing and accurate
884	color modelling through spectral integration. For all
885	these applications, both theoretical and implementation
886	aspects are developed and it is shown that stochastic
887	techiques can provide very simple and efficient
888	algorithms.",
889	}
890
891	@InProceedings{Drettakis94,
892	author = "George Drettakis and Eugene Fiume",
893	title = "A Fast Shadow Algorithm for Area Light Sources Using
894	Backprojection",
895	booktitle = "SIGGRAPH '94 Proc.",
896	pages = "223--230",
897	year = "1994",
898	keywords = "shadows, umbra, penumbra, discontinuity meshing,
899	global illumination, backprojection",
900	note =
901	"http://safran.imag.fr/Membres/George.Drettakis/pub.html",
902	}
903
904	@InProceedings{Stewart94,
905	author = "A. James Stewart and Sherif Ghali",
906	title = "Fast Computation of Shadow Boundaries using Spatial
907	Coherence and Backprojection",
908	booktitle = "Proceedings of SIGGRAPH '94",
909	pages = "231--238",
910	month = jul,
911	year = "1994",
912	keywords = "shadows, backprojection, discontinuity mesh, aspect
913	graphs, radiosity, visual events, efficient surface
914	enumeration, spatial coherence",
915	}
916
917	@InProceedings{Stewart93,
918	author = "A. James Stewart and Sherif Ghali",
919	title = "An Output Sensitive Algorithm for the Computation of
920	Shadow Boundaries",
921	booktitle = "Canadian Conference on Computational Geometry",
922	pages = "291--296",
923	month = aug,
924	year = "1993",
925	}
926
927	@InProceedings{haines91shaft,
928	author = "Eric Haines and John Wallace",
929	title = "Shaft culling for efficient ray-traced radiosity",
930	booktitle = "Eurographics Workshop on Rendering",
931	month = "may",
932	year = "1991",
933	conference = "Barcelona",
934	keywords = "radiosity, ray tracing, bounding volumes",
935	abstract = "
936	A shaft is a volume between an emitter and receiver. A
937	list of enclosing boxes, c.q. patches that are in that
938	volume is generated. The ray casting to determine
939	visibility between emitter and receiver can be reduced
940	by only testing the rays against the patches in the
941	shaft. Methods to make the shafts, and to determine
942	which object are in the shaft are given.
943	",
944	}
945
946	@InProceedings{shirley91direct,
947	author = "Peter Shirley and Changyaw Wang",
948	title = "Direct lighting calculation by Monte Carlo
949	integration",
950	booktitle = "Eurographics Workshop on Rendering",
951	year = "1991",
952	conference = "held in Barcelona, Spain; 13-15 May 1991",
953	keywords = "monte carlo, illumination",
954	abstract = "Application of Monte Carlo techniques for rendering
955	scenes with multiple light sources. Only one shadow ray
956	per viewing ray is used. Some issues for the design of
957	probability densities for light sources are given.",
958	}
959
960	@InProceedings{kok91a,
961	author = "Arjan Kok and Frederik Jansen",
962	title = "Source selection for the direct lighting component in
963	global illumination",
964	booktitle = "Eurographics Workshop on Rendering",
965	year = "1991",
966	conference = "held in Barcelona, Spain; 13-15 May 1991",
967	keywords = "two pass",
968	abstract = "Describes criteria for deciding which patches should
969	be considered to be light sources in a two pass method
970	in which direct lighting component is calculated
971	separately in the second pass.",
972	}
973
974	@InCollection{Zimmerman95,
975	author = "Kurt Zimmerman",
976	editor = "Alan W. Paeth",
977	title = "Direct Lighting Models for Ray Tracing with
978	Cylindrical Lamps",
979	booktitle = "Graphics Gems V",
980	pages = "285--289",
981	publisher = "Academic Press Professional",
982	address = "Boston, MA",
983	year = "1995",
984	}
985
986	@INCOLLECTION{Zimmerman95twopass,
987	AUTHOR={Kurt Zimmerman and Peter Shirley},
988	TITLE={A Two-Pass Realistic Image Synthesis Method for Complex Scenes},
989	BOOKTITLE={Rendering Techniques '95 (Proceedings of the Sixth Eurographics
990	Workshop on Rendering)},
991	PUBLISHER={Springer-Verlag},
992	ADDRESS={NY},
993	PAGES={284-295},
994	YEAR=1995,
995	NOTE={Also ftp://ftp.cs.indiana.edu/pub/techreports/TR434.ps.Z},
996	KEYWORDS={shadow},
997	}
998
999	@InCollection{Wang92,
1000	author = "Changyaw Wang",
1001	editor = "David Kirk",
1002	title = "Physically Correct Direct Lighting for Distribution
1003	Ray Tracing",
1004	booktitle = "Graphics Gems III",
1005	pages = "307-313, 562-568",
1006	publisher = "Academic Press",
1007	address = "Boston, MA",
1008	year = "1992",
1009	keywords = "monte carlo, area light source, soft shadows",
1010	annote = "includes code",
1011	}
1012
1013	@InProceedings{rossignac89b,
1014	author = "J. Rossignac and J. Wu",
1015	title = "Depth-interval buffer for hardware-assisted shading
1016	from {CSG}: Accurate treatment of coincident faces and
1017	shadows",
1018	booktitle = "Fifth Eurographics Workshop on Graphics Hardware",
1019	year = "1989",
1020	editor = "D. Grimsdale and A. Kaufman",
1021	conference = "held in Lausanne, Switzerland; 2-3 September 1989",
1022	keywords = "hardware",
1023	annote = "Discuss the role of a depth interval buffer using a
1024	new version of the Trickle algorithm for handling
1025	coincident faces and shadows with CSG
1026	representations.",
1027	}
1028
1029
1030	@article{Fuchs85sig,
1031	author = "Henry Fuchs and Jack Goldfeather and Jeff P. Hultquist
1032	and Susan Spach and John D. Austin and Brooks, Jr., Frederick P.
1033	and John G. Eyles and John Poulton",
1034	title = "Fast Spheres, Shadows, Textures, Transparencies, and
1035	Image Enhancements in {Pixel-Planes}",
1036	pages = "111--120",
1037	journal = "Computer Graphics (SIGGRAPH '85 Proceedings)",
1038	volume = "19",
1039	number = "3",
1040	year = "1985",
1041	month = jul,
1042	keywords = "pixel planes, parallel processing",
1043	annote = "Fuchs' Pixel-Planes machine is explained in general.
1044	See [Eyles 87] for a final report. Explanation of how
1045	the machine can process linear equations, and gives
1046	several algorithms for display. Also published in
1047	Advances in Computer Graphics I, EUROGRAPHICS 86.",
1048	}
1049
1050	@Article{eyles87a,
1051	author = "John Eyles and John Austin and Henry Fuchs and Trey
1052	Greer and John Poulton",
1053	title = "{Pixel-Planes} 4: {A} Summary",
1054	pages = "183--207",
1055	journal = "Advances in Computer Graphics Hardware II, Record of
1056	Second Eurographics Workshop on Graphics Hardware",
1057	year = "1987",
1058	keywords = "parallel processing",
1059	annote = "A final report on the Pixel-Planes system. See also
1060	[Fuchs 85].",
1061	}
1062
1063	@InProceedings{amanatides84a,
1064	author = "John Amanatides",
1065	title = "Ray Tracing with Cones",
1066	pages = "129--135",
1067	journal = "Computer Graphics (SIGGRAPH '84 Proceedings)",
1068	volume = "18",
1069	number = "3",
1070	year = "1984",
1071	month = jul,
1072	conference = "held in Minneapolis, Minnesota; 23--27 July 1984",
1073	keywords = "cone tracing, antialiasing, I35 Ray Tracing",
1074	annote = "ray tracing spheres and polygons with circular conical
1075	rays A technique for antialiasing in ray tracing is
1076	presented which utilizes cones instead of rays. Cones
1077	prevent problems generally associated with point
1078	sampling, and therefore allow for more natural images.
1079	The mathematics involved seem only ``pretty'' for
1080	spherical objects, so an acid test has yet to be
1081	performed. \\ A new approach to ray tracing is
1082	introduced. The definition of a ``ray'' is extended
1083	into a cone by including information on the spread
1084	angle and the virtual origin. The advantages of this
1085	approach, which tries to model light propagation with
1086	more fidelity, include a better method of antialiasing,
1087	a way of calculating fuzzy shadows and dull
1088	reflections, a method of calculating the correct level
1089	of detail in a procedural model and texture map, and
1090	finally, a procedure for faster intersection
1091	calculation.",
1092	}
1093
1094	@InProceedings{salesin89a,
1095	author = "David Salesin and Jorge Stolfi",
1096	title = "The {ZZ}-Buffer: a Simple and Efficient Rendering
1097	Algorithm with Reliable Antialiasing",
1098	pages = "451--466",
1099	journal = "Proceedings of the PIXIM '89",
1100	year = "1989",
1101	annote = "The ZZ-buffer is a new rendering algorithm that is
1102	simple, efficient, and produces high-quality images.
1103	The algorithm correctly renders transparent surfaces,
1104	shadows with real penumbrae, and depth of field
1105	effects. The ZZ-buffer algorithm is substantially
1106	faster than ray tracing an nearly as versatile. While
1107	the ZZ-buffer is somewhat slower than the Z-buffer or
1108	A-buffer, it avoids the aliasing and other artifacts of
1109	these algorithms. The algorithm's efficiency comes from
1110	a screen-space object indexing scheme, and from the use
1111	of lazy evaluation for visibility tests. It achieves
1112	reliable antialiasing by employing an adaptive form of
1113	stochastic supersampling. The algorithm is simple
1114	enough that we give most of its code here in this
1115	paper. The algorithm has been implemented as part of a
1116	commercial production system and has proved robust over
1117	a large variety of images.",
1118	}
1119
1120	@InProceedings{Muller:1994:FRR,
1121	author = "Stefan Muller and Frank Schoffel",
1122	booktitle = "Fifth Eurographics Workshop on Rendering",
1123	title = "Fast Radiosity Repropagation for Interactive Virtual
1124	Environments Using a Shadow-Form-Factor-List",
1125	address = "Darmstadt, Germany",
1126	pages = "325--342",
1127	month = jun,
1128	year = "1994",
1129	keywords = "dynamic environments, shadow-form-factor-list, scene
1130	coherence, radiosity repropagation, progressive
1131	refinement radiosity",
1132	bibsource = "sig-11-1994",
1133	}
1134
1135
1136	@TechReport{Seales89,
1137	author = "W. Brent Seales and Charles R. Dyer",
1138	title = "Using the {ASP} for the Interactive Viewing of
1139	Polyhedral Scenes",
1140	institution = "University of Wisconsin",
1141	number = "TR 903",
1142	month = dec,
1143	year = "1989",
1144	abstract = "In this paper we discuss an approach for solving the
1145	problem of interactively viewing a polyhedral scene.
1146	Interactive viewing is the computation and display of
1147	an interactively controlled sequence of views of a
1148	scene corresponding to a viewer's movement along a
1149	continuous viewpath. We present an algorithm for
1150	generating such views with hidden-lines removed, and
1151	consider extensions to solve the problem of generating
1152	views with hidden-surfaces removed. The method relies
1153	on a precomputation phase which constructs the {\it
1154	aspect representation}, or asp. This representation can
1155	be used to interactively view a polyhedral scene at
1156	video rates with hidden-lines or surfaces removed. The
1157	method exploits {\it viewpath coherence}, a form of
1158	frame-to-frame coherence present in such a sequence of
1159	views. The display of polyhedral line drawings with
1160	hidden lines removed makes use of the topology of the
1161	image line drawing and the pre-ordering of visual
1162	events which change that topology. This approach is
1163	extended to interactive viewing with hidden-surfaces
1164	removed and with shading, shadows, and multiple light
1165	sources. The set of object resolution polygons
1166	representing the visible faces and the shadow polygons
1167	for a single frame can be computed efficiently from the
1168	previous frame using the asp. The hidden-line and
1169	hidden-surface algorithms are closely related via the
1170	asp. Interactive viewing with hidden-lines removed is
1171	shown to be about as fast as the interactive display of
1172	a wire-frame scene. The primary on-line cost of
1173	hidden-surface interactive viewing is the cost
1174	associated with scan converting the visible surfaces
1175	and shadow polygons.",
1176	}
1177
1178	@InProceedings{seales90a,
1179	author = "W. Brent Seales and Charles R. Dyer",
1180	title = "Shaded Rendering and Shadow Computation for Polyhedral
1181	Animation",
1182	pages = "175--182",
1183	journal = "Proceedings of Graphics Interface '90",
1184	year = "1990",
1185	month = may,
1186	conference = "held in Halifax, Nova Scotia; 14-18 May 1990",
1187	keywords = "animation, aspect representation, hidden-surface
1188	computation, interactive viewing, viewpath coherence",
1189	}
1190
1191	@InProceedings{wanger92a,
1192	author = "Leonard Wanger",
1193	title = "The effect of shadow quality on the perception of
1194	spatial relationships in computer generated imagery",
1195	pages = "39--42",
1196	journal = "Computer Graphics (1992 Symposium on Interactive 3D
1197	Graphics)",
1198	volume = "25",
1199	number = "2",
1200	year = "1992",
1201	month = mar,
1202	editor = "David Zeltzer",
1203	conference = "held in Boston; 29 March - 1 April 1992",
1204	keywords = "interactive tasks, spatial relations, cue theory",
1205	}
1206
1207	@TechReport{QMW-DCS-521-1990a,
1208	author = "M. Slater",
1209	title = "Dynamic Modification Of Objects In 3{D} Scenes Using
1210	Tiling And {A} {Z} -Buffer",
1211	institution = "Queen Mary College, Department of Computer Science",
1212	year = "1990",
1213	month = nov,
1214	number = "QMW-DCS-1990-521",
1215	scope = "ace",
1216	abstract-url = "http://www.dcs.qmw.ac.uk/publications/report_abstracts/1990/521",
1217	keywords = "Interactive 3D Graphics, Z-Buffer, Tiling, Shadows,
1218	Graphica Objects, Segments.",
1219	}
1220
1221	@InProceedings{Chrysantho1995a,
1222	author = "Yiorgos Chrysanthou and Mel Slater",
1223
1224	booktitle = "ACM SIGGRAPH Symposium on Interactive 3D Graphics,
1225	Monterey, CA",
1226	title = "Shadow Volume {BSP} Trees for Computation of Shadows
1227	in Dynamic Scenes",
1228	year = "1995",
1229	month = apr,
1230	pages = "45--50",
1231
1232	}
1233
1234	@Incollection{arvo89survey,
1235	author = "James Arvo and David Kirk",
1236	title = "A survey of ray tracing acceleration techniques",
1237	pages = "201--262",
1238	booktitle = "An introduction to ray tracing",
1239	year = "1989",
1240	editor = "Andrew S. Glassner",
1241	publisher = "Academic Press",
1242	}
1243
1244	@InProceedings{Arvo95irrad,
1245	author = "James Arvo",
1246	title = "Applications of Irradiance Tensors to the Simulation
1247	of Non-Lambertian Phenomena",
1248	pages = "335--342",
1249	booktitle = "SIGGRAPH 95 Proceedings",
1250	year = "1995",
1251	month = aug,
1252	keywords={shadow, shading},
1253	}
1254
1255	@Article{Hourcade85,
1256	author = "J. C. Hourcade and A. Nicolas",
1257	title = "Algorithms for Antialiased Cast Shadows",
1258	pages = "259--265",
1259	journal = "Computers and Graphics",
1260	volume = "9",
1261	number = "3",
1262	year = "1985",
1263	keywords = "z-buffer shadow",
1264	}
1265
1266	@InProceedings{Tanaka90,
1267	author = "Toshimitsu Tanaka and Tokiichiro Takahashi",
1268	title = "Cross Scanline Algorithm",
1269	pages = "63--74",
1270	booktitle = "Eurographics '90",
1271	year = "1990",
1272	month = sep,
1273	publisher = "North-Holland",
1274	}
1275
1276	@inproceedings{Tanaka91,
1277	author = "Toshimitsu Tanaka and Tokiichiro Takahashi",
1278	title = "Shading with Area Light Sources",
1279	booktitle = "Eurographics '91",
1280	publisher = "North-Holland",
1281	pages = "235--246, 535--537",
1282	month = sep,
1283	year = "1991",
1284	annote = "no shadows",
1285	}
1286
1287	@ARTICLE{Tanaka94,
1288	author = "Toshimitsu Tanaka and Tokiichiro Takahashi",
1289	journal = "Computer Graphics Forum",
1290	title = "Cross Scan Buffer and its Applications",
1291	volume = "13",
1292	number = "3",
1293	publisher = "Basil Blackwell Ltd",
1294	pages = "467--376",
1295	year = "1994",
1296	note = "Eurographics '94 Conference issue",
1297	}
1298
1299	@ARTICLE{Tanaka95,
1300	title = "Fast Shadowing Algorithm for Linear Light Sources",
1301	author = "Toshimitsu Tanaka and Tokiichiro Takahashi",
1302	journal = "Computer Graphics Forum",
1303	volume = "14",
1304	number = "3",
1305	pages = "205--216",
1306	year = "1995",
1307	note = "Eurographics '95 Conference issue",
1308	}
1309
1310	@ARTICLE{Tanaka96,
1311	title={Fast Analytic Shading and Shadowing for Area Light Sources},
1312	author={Toshimitsu Tanaka and Tokiichiro Takahashi},
1313	note={Submitted for publication},
1314	year=1996,
1315	annote={diffuse and specular surfaces},
1316	}
1317
1318	@ARTICLE{Max95,
1319	AUTHOR={Nelson Max},
1320	TITLE={Optimal Sampling for Hemicubes},
1321	JOURNAL={IEEE Trans. on Visualization and Computer Graphics},
1322	VOLUME={1},
1323	NUMBER={1},
1324	YEAR={1995},
1325	KEYWORDS={hemicube, radiosity, form factor, sampling, variance, optimization},
1326	ABSTRACT={
1327	The hemicube estimates of form factors are based on a finite set of
1328	sample directions. We obtain several optimal arrangements of sample
1329	directions, which minimize the variance of these estimates. They are
1330	based on changing the size or shape of the pixels or the shape of the
1331	hemicube, or using non-uniform pixel grids. The best reduces the
1332	variance by 43%.
1333
1334	The variance calculation is based on the assumption that the errors in
1335	the estimate are caused by the projections of single polygon edges, and
1336	that the positions and orientations of these edges are random. This
1337	replaces the infinite dimensional space of possible environments by the
1338	two dimensional space of great circles on the unit sphere, making the
1339	numerical variance minimization possible.
1340	},
1341	}
1342
1343	@InProceedings{Myszkowski94,
1344	title = "Texture Mapping as an Alternative for Meshing During
1345	Walkthrough Animation",
1346	author = "Karol Myszkowski and Tosiyasu L. Kunii",
1347	booktitle = "Fifth Eurographics Workshop on Rendering",
1348	pages = "375--388",
1349	month = jun,
1350	year = "1994",
1351	keywords = "texture mapping, Gouraud shading, meshing, radiosity",
1352	}
1353
1354	@INPROCEEDINGS{Ayatsuka96,
1355	TITLE={Penumbrae for 3D Interactions},
1356	AUTHOR={Yuji Ayatsuka and Satoshi Matsuoka and Jun Rekimoto},
1357	BOOKTITLE={9th Annl. Symp. for User Interface Software and Technology (UIST96)},
1358	MONTH={Nov.},
1359	YEAR=1996,
1360	PAGES={165-166},
1361	ABSTRACT={
1362	We propose a new feedback technique for 3D interaction in augmented
1363	reality using penumbrae which the objects cast. Rather than generating
1364	a real penumbra, which is computationally expensive, a fast, simplified
1365	algorithm is employed, which also is better suited for position
1366	feedback purposes. User studies show that 1) compared to orthographic
1367	shadow projections, 3D spatial recognition and placement tasks are
1368	substantially faster with our penumbrae, and 2) the users feel the
1369	feedback to be more natural, which is especially important in augmented
1370	reality.
1371	from http://www-masuda.is.s.u-tokyo.ac.jp/~aya/works/penumbra.html
1372	},
1373	}
1374
1375	@TECHREPORT{Goslin95,
1376	author={Michael Goslin},
1377	title={Illumination as Texture Maps for Faster Rendering},
1378	SCHOOL={Dept. of CS, U. of North Carolina, Chapel Hill},
1379	year=1995,
1380	note={TR 95-042},
1381	keywords={texture mapping, radiosity, walkthrough, graphics workstation},
1382	note={ftp://ftp.cs.unc.edu/pub/publications/techreports/95.html},
1383	}
1384
1385	@TECHREPORT{Bastos96,
1386	AUTHOR={Rui Bastos and Michael Goslin and Hansong Zhang},
1387	TITLE={Efficient Rendering of Radiosity Using Textures and Bicubic
1388	Reconstruction},
1389	NOTE={TR 96-025},
1390	INSTITUTION={Dept. of CS, U. of North Carolina at Chapel Hill},
1391	YEAR=1996,
1392	KEYWORDS={texture mapping},
1393	NOTE={http://www.cs.unc.edu/~bastos/radiosity.html},
1394	annote={also available at
1395	ftp://ftp.cs.unc.edu/pub/publications/techreports/96.html},
1396	}
1397
1398	@INPROCEEDINGS{Bastos97,
1399	AUTHOR={Rui Bastos and Michael Goslin and Hansong Zhang},
1400	TITLE={Efficient Radiosity Rendering using Textures and Bicubic Reconstruction},
1401	BOOKTITLE={1997 Symposium on Interactive 3D Graphics},
1402	publisher={ACM SIGGRAPH},
1403	YEAR=1997,
1404	KEYWORDS={texture mapping},
1405	NOTE={To appear.
1406	http://www.cs.unc.edu/~bastos/radiosity.html},
1407	}
1408
1409	@Article{Appel67qi,
1410	author = "Arthur Appel",
1411	title = "The Notion of Quantitative Invisibility and the
1412	Machine Rendering of Solids",
1413	year = "1967",
1414	journal = "Proc. ACM Natl. Mtg.",
1415	pages = "387-393",
1416	keywords = "hidden line",
1417	}
1418
1419	@ARTICLE{Ackland81edge,
1420	author = "Bryan D. Ackland and Neil H. Weste",
1421	title = "The edge flag algorithm - a fill method for raster
1422	scan displays",
1423	journal = "IEEE Trans. on Comp.",
1424	volume = "C-30",
1425	year = "1981",
1426	pages = "41--47",
1427	descriptors = "Method; display; realization; two-dimensional plot;
1428	three-dimensional plot; graphics; frame store; polygon
1429	fill; raster scan; computer animation;",
1430	annote = "Contour (polygon) filling is a primitive required in
1431	many application areas of raster scan graphics. The
1432	bit-map memory in a frame-store display is
1433	computationally well suited to this task, as it
1434	provides a large scratch pad working space. In this
1435	paper, a number of contour filling algorithms based on
1436	the read/write properties of the frame-store memory are
1437	compared with the classical {"}ordered-edge-list{"}
1438	approach.",
1439	}
1440
1441	@INPROCEEDINGS{Hardt96,
1442	author={Stephen Hardt and Seth Teller},
1443	title={High-Fidelity Radiosity Rendering at Interactive Rates},
1444	booktitle={Rendering Techniques '96},
1445	publisher={Springer-Verlag},
1446	year=1996,
1447	note={(Proc. Eurographics Workshop on Rendering)},
1448	pages={71-80,283},
1449	keywords={real time},
1450	}
1451
1452	@TECHREPORT{Moller95ms,
1453	author={Tomas M\"oller},
1454	title={Virtual Radiosity},
1455	month={Sept.},
1456	year=1995,
1457	institution={Dept. of Computer Engineering, Lund Inst. of Tech., Sweden},
1458	keywords={texture mapping, graphics workstation, level of detail,
1459	virtual reality},
1460	note={Master's thesis, http://www.clarus.se/People/tompa/reports.html},
1461	annote={radiosity algorithm for graphics workstations that uses
1462	hardware texture mapping and multiple LODs},
1463	}
1464
1465	@TECHREPORT{Moller96lic,
1466	author={Tomas M\"oller},
1467	title={Speed-Up Techniques for Computer Graphics},
1468	month={Dec.},
1469	year=1996,
1470	institution={Dept. of Computer Engineering, Chalmers U. of Tech., Sweden},
1471	note={Technical Report No. 250L, Licenciate thesis,
1472	http://www.clarus.se/People/tompa/reports.html},
1473	annote={66 pp.,
1474	contains four papers:
1475	(1) image resampling (Fast Bitmap Stretching, Gems III),
1476	(2) ray-surface intersection optimization (Faster Ray Tracing Using Scanline
1477	Rejection, Gems V),
1478	(3) texturing for radiosity in VR (Radiosity Techniques for Virtual Reality,
1479	Plzen, Czech, 1996),
1480	(4) faster soft shadows (Speed-Up Techniques for Soft Shadow Generation,
1481	submitted 1996).
1482	},
1483	}
1484

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