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[diderot] Diff of /branches/pure-cfg/TODO
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Diff of /branches/pure-cfg/TODO

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revision 1046, Mon May 2 11:54:09 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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