Diff of /branches/pure-cfg/TODO

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	revision 1048, Mon May 2 20:00:02 2011 UTC	revision 1049, Tue May 3 15:20:16 2011 UTC
#	Line 1	Line 1
1	NOTE: GLK's approximate ranking of 5 most imporant tagged with	NOTE: GLK's approximate ranking of 5 most important tagged with
2	[GLK:1], [GLK:2], ...	[GLK:1], [GLK:2], ...
3
4	========================	==============================
5	SHORT TERM =============  (for curvature-based VR)	other SHORT TERM =============  (including needed for LIC)
6	========================	==============================
7
8		[GLK:1] Add sequence types (needed for evals & evecs)
9		syntax
10		types: ty '{' INT '}'
11		value construction: '{' e1 ',' … ',' en '}'
12		indexing: e '{' e '}'
13
14	IL support for higher-order tensor values (matrices, etc).	IL support for higher-order tensor values (matrices, etc).
15	tensor construction [DONE]	tensor construction [DONE]
#	Line 16	Line 22
22	typechecking	typechecking
23	IL and codegen	IL and codegen
24
	Add sequence types
	syntax
	types: ty '{' INT '}'
	value construction: '{' e1 ',' … ',' en '}'
	indexing: e '{' e '}'
	==============================
	other SHORT TERM =============  (including needed for LIC)
	==============================
25	test/uninit.diderot:	test/uninit.diderot:
26	documents need for better compiler error messages when output variables	documents need for better compiler error messages when output variables
27	are not initialized; the current messages are very cryptic	are not initialized; the current messages are very cryptic
28
29	determinant ("det") for tensor[3,3]	determinant ("det") for tensor[3,3]
30
	extend norm (|exp|) to all tensor types [DONE for vectors and matrices]
31	expand trace in mid to low translation	expand trace in mid to low translation
32
33	value-numbering optimization	value-numbering optimization
#	Line 46	Line 40
40	MEDIUM TERM ================== (including needed for streamlines & tractography)	MEDIUM TERM ================== (including needed for streamlines & tractography)
41	==============================	==============================
42
43	[GLK:2] evals & evecs for symmetric tensor[3,3] (requires sequences)	[GLK:1] evals & evecs for symmetric tensor[3,3] (requires sequences)
44
45	[GLK:3] Save Diderot output to nrrd, instead of "mip.txt"	[GLK:2] Save Diderot output to nrrd, instead of "mip.txt"
46	For grid of strands, save to similarly-shaped array	For grid of strands, save to similarly-shaped array
47	For list of strands, save to long 1-D (or 2-D for non-scalar output) list	For list of strands, save to long 1-D (or 2-D for non-scalar output) list
48	For ragged things (like tractography output), will need to save both	For ragged things (like tractography output), will need to save both
49	complete list of values, as well as list of start indices and lengths	complete list of values, as well as list of start indices and lengths
50	to index into complete list	to index into complete list
51
52	[GLK:4] Use of Teem's "hest" command-line parser for getting	[GLK:3] Use of Teem's "hest" command-line parser for getting
53	any input variables that are not defined in the source file	any input variables that are not defined in the source file
54
55	[GLK:5] ability to declare a field in such a way so that probe	[GLK:4] ability to declare a field in such a way so that probe
56	positions are *always* clamped to the support of "inside";	positions are *always* clamped to the support of "inside";
57	there are many cases where this is the sensible behavior.	there are many cases where this is the sensible behavior.
58	(More generally, we could also have "repeat" declaration,	(could also have "repeat" declaration, to mimic GL_REPEAT texturing)
59	copying action of GL_REPEAT in texturing)
60		extend norm (|exp|) to all tensor types [DONE for vectors and matrices]
61
62	ability to emit/track/record variables into dynamically re-sized	ability to emit/track/record variables into dynamically re-sized
63	runtime buffer	runtime buffer
#	Line 98	Line 93
93	other MEDIUM TERM ============ (needed for particles)	other MEDIUM TERM ============ (needed for particles)
94	==============================	==============================
95
96	run-time birth and death of strands	[GLK:5] run-time death of strands; test/iso2d.diderot provides
97		great initial test for "die" command.
98
99		run-time birth of strands
100
101	"initially" supports lists	"initially" supports lists
102
#	Line 117	Line 115
115	(but we should only duplicate over the live-range of the result of the	(but we should only duplicate over the live-range of the result of the
116	conditional.	conditional.
117
118		add ":" for tensor dot product (contracts out two indices
119		instead of one like •), valid for all pairs of tensors with
120		at least two indices
121
122	==============================	==============================
123	other MEDIUM TERM ============	other MEDIUM TERM ============
124	==============================	==============================
#	Line 126	Line 128
128
129	support for Python interop and GUI	support for Python interop and GUI
130
131		Python/ctypes interface to run-time
132
133	==============================	==============================
134	LONG TERM ====================	LONG TERM ====================
135	==============================	==============================
#	Line 138	Line 142
142
143	co- vs contra- index distinction	co- vs contra- index distinction
144
	add ":" for tensor dot product (contracts out two indices
	instead of one like •), valid for all pairs of tensors with
	at least two indices
145	some indication of tensor symmetry	some indication of tensor symmetry
146	(have to identify the group of index permutations that are symmetries)	(have to identify the group of index permutations that are symmetries)
147
#	Line 153	Line 153
153
154	"tensor comprehension" (like list comprehension)	"tensor comprehension" (like list comprehension)
155
	Python/ctypes interface to run-time
156	======================	======================
157	BUGS =================	BUGS =================
158	======================	======================
159
160	[GLK:1] test/fields.diderot:	test/fields.diderot:
161	documents various bugs/questions associated with simple field expressions	Can't assign on field to another.
	(negation, addition, scalar multiplication)
162
163	test/read2vecs.diderot:	test/read2vecs.diderot:
164	// HEY (BUG?) shouldn't it be a type error to load this 2-D array of	// HEY (BUG?) shouldn't it be a type error to load this 2-D array of

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