Home My Page Projects Code Snippets Project Openings diderot
Summary Activity Tracker Tasks SCM

SCM Repository

[diderot] Diff of /branches/vis12/TODO
ViewVC logotype

Diff of /branches/vis12/TODO

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 1257, Tue May 24 18:47:46 2011 UTC revision 1442, Sun Jul 10 08:09:50 2011 UTC
# Line 5  Line 5 
5  SHORT TERM ============= (*needed* for streamlines & tractography)  SHORT TERM ============= (*needed* for streamlines & tractography)
6  ========================  ========================
7    
8  Remove CL from compiler  [GLK:2] Add sequence types (needed for evals & evecs)
   
 [GLK:3] Add sequence types (needed for evals & evecs)  
9      syntax      syntax
10          types: ty '{' INT '}'          types: ty '{' INT '}'
11          value construction: '{' e1 ',' … ',' en '}'          value construction: '{' e1 ',' … ',' en '}'
12          indexing: e '{' e '}'          indexing: e '{' e '}'
13    
14  [GLK:4] evals & evecs for symmetric tensor[2,2] and  [GLK:3] evals & evecs for symmetric tensor[2,2] and
15  tensor[3,3] (requires sequences)  tensor[3,3] (requires sequences)
16    
17  ability to emit/track/record variables into dynamically re-sized  ability to emit/track/record variables into dynamically re-sized
18  runtime buffer  runtime output buffer
19    
20  tensor fields: convolution on general tensor images  [GLK:4] tensor fields from tensor images: Initially need at least
21    convolution on tensor[2,2] and tensor[3,3] (the same component-wise
22    convolution as for vectors).
23    
24  ========================  ========================
25  SHORT-ISH TERM ========= (to make using Diderot less annoying to  SHORT-ISH TERM ========= (to make using Diderot less annoying to
26  ========================  program in, and slow to execute)  ========================  program in, and slow to execute)
27    
 value-numbering optimization [DONE]  
   
28  Allow ".ddro" file extensions in addition to ".diderot"  Allow ".ddro" file extensions in addition to ".diderot"
29    
30  Be able to output values of type tensor[2,2] and tensor[3,3];  Be able to output values of type tensor[2,2] and tensor[3,3];
31  (currently only scalars & vectors).  Want to add some regression tests  (currently only scalars & vectors).  Want to add some regression tests
32  based on this and currently can't  based on this and currently can't
33    
34  [GLK:1] Add a clamp function, which takes three arguments; either  [GLK:1] Proper handling of stabilize method
 three scalars:  
   clamp(lo, hi, x)  = max(lo, min(hi, x))  
 or three vectors of the same size:  
   clamp(lo, hi, [x,y])  = [max(lo[0], min(hi[0], x)),  
                            max(lo[1], min(hi[1], y))]  
 This would be useful in many current Diderot programs.  
 One question: clamp(x, lo, hi) is the argument order used in OpenCL  
 and other places, but clamp(lo, hi, x) is much more consistent with  
 lerp(lo, hi, x), hence GLK's preference  
35    
36  [GLK:2] Proper handling of stabilize method  Convolution on general tensor images (order > 2)
37    
38  allow "*" to represent "modulate": per-component multiplication of  allow "*" to represent "modulate": per-component multiplication of
39  vectors, and vectors only (not tensors of order 2 or higher).  Once  vectors, and vectors only (not tensors of order 2 or higher).  Once
# Line 54  Line 43 
43  implicit type promotion of integers to reals where reals are  implicit type promotion of integers to reals where reals are
44  required (e.g. not exponentiation "^")  required (e.g. not exponentiation "^")
45    
46  [GLK:5] Save Diderot output to nrrd, instead of "mip.txt"  [Nick working on this] Save Diderot output to nrrd, instead of "mip.txt"
47    For grid of strands, save to similarly-shaped array    For grid of strands, save to similarly-shaped array
48    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
49    For ragged things (like tractography output), will need to save both    For ragged things (like tractography output), will need to save both
50      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
51      to index into complete list      to index into complete list
52    
53  [GLK:6] Use of Teem's "hest" command-line parser for getting  [GLK:6] ability to declare a field so that probe positions are
 any "input" variables that are not defined in the source file.  
   
 [GLK:7] ability to declare a field so that probe positions are  
54  *always* "inside"; with various ways of mapping the known image values  *always* "inside"; with various ways of mapping the known image values
55  to non-existant index locations.  One possible syntax emphasizes that  to non-existant index locations.  One possible syntax emphasizes that
56  there is a index mapping function that logically precedes convolution:  there is a index mapping function that logically precedes convolution:
# Line 87  Line 73 
73      rgb = real{3}      rgb = real{3}
74      rgba = real{4}      rgba = real{4}
75    
76    Revisit how images are created within the language.
77    The "load" operator should probably go away, and its strangs
78    that strings are there only as a way to refer to nrrd filenames
79    
80  ==============================  ==============================
81  MEDIUM TERM ================== (*needed* for particles)  MEDIUM TERM ================== (*needed* for particles)
82  ==============================  ==============================
83    
84  run-time birth of strands  [Lamont working on this] run-time birth of strands
85    
86  "initially" supports lists  "initially" supports lists
87    
# Line 100  Line 90 
90  e.g. using output of iso2d.diderot for one isovalue to seed the input  e.g. using output of iso2d.diderot for one isovalue to seed the input
91  to another invocation of the same program)  to another invocation of the same program)
92    
93  Communication between strands: they have to be able to learn each  [Lamont working on this] Communication between strands: they have to
94  other's state (at the previous iteration).  Early version of this can  be able to learn each other's state (at the previous iteration).
95  have the network of neighbors be completely static (for running one  Early version of this can have the network of neighbors be completely
96  strand/pixel image computations).  Later version with strands moving  static (for running one strand/pixel image computations).  Later
97  through the domain will require some spatial data structure to  version with strands moving through the domain will require some
98  optimize discovery of neighbors.  spatial data structure to optimize discovery of neighbors.
99    
100  ============================  ============================
101  MEDIUM-ISH TERM ============ (to make Diderot more useful/effective)  MEDIUM-ISH TERM ============ (to make Diderot more useful/effective)
102  ============================  ============================
103    
104    [GLK:5] Want code-generation working for tensors of order three.
105    Order three matters for edge detection in scalar fields (to get
106    second derivatives of gradient magnitude), second derivatives
107    of vector fields (for some feature extraction), and first
108    derivatives of diffusion tensor fields.
109    
110  Python/ctypes interface to run-time  Python/ctypes interface to run-time
111    
112  support for Python interop and GUI  support for Python interop and GUI
# Line 118  Line 114 
114  Allow integer exponentiation ("^2") to apply to square matrices,  Allow integer exponentiation ("^2") to apply to square matrices,
115  to represent repeated matrix multiplication  to represent repeated matrix multiplication
116    
 Alow X *= Y, X /= Y, X += Y, X -= Y to mean what they do in C,  
 provided that X*Y, X/Y, X+Y, X-Y are already supported.  
 Nearly every Diderot program would be simplified by this.  
   
117  Put small 1-D and 2-D fields, when reconstructed specifically by tent  Put small 1-D and 2-D fields, when reconstructed specifically by tent
118  and when differentiation is not needed, into faster texture buffers.  and when differentiation is not needed, into faster texture buffers.
119  test/illust-vr.diderot is good example of program that uses multiple  test/illust-vr.diderot is good example of program that uses multiple
120  such 1-D fields basically as lookup-table-based function evaluation  such 1-D fields basically as lookup-table-based function evaluation
121    
 expand trace in mid to low translation  
   
122  extend norm (|exp|) to all tensor types [DONE for vectors and matrices]  extend norm (|exp|) to all tensor types [DONE for vectors and matrices]
123    
124  determinant ("det") for tensor[3,3]  determinant ("det") for tensor[3,3]
# Line 152  Line 142 
142      tensor construction [DONE]      tensor construction [DONE]
143      tensor indexing [DONE]      tensor indexing [DONE]
144      tensor slicing      tensor slicing
     verify that hessians work correctly [DONE]  
145    
146  Better handling of variables that determines the scope of a variable  Better handling of variables that determines the scope of a variable
147  based on its actual use, instead of where the user defined it.  So,  based on its actual use, instead of where the user defined it.  So,
# Line 166  Line 155 
155  (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
156  conditional.  conditional.
157    
158  [GLK:8] Want: non-trivial field expressions & functions.  [GLK:7] Want: non-trivial field expressions & functions.
159  scalar fields from scalar fields F and G:  scalar fields from scalar fields F and G:
160    field#0(2)[] X = (sin(F) + 1.0)/2;    field#0(2)[] X = (sin(F) + 1.0)/2;
161    field#0(2)[] X = F*G;    field#0(2)[] X = F*G;
# Line 219  Line 208 
208    field#0(2)[] F = lambda([x,y], Ft([x,y,42.0]))     // restriction to time=42.0    field#0(2)[] F = lambda([x,y], Ft([x,y,42.0]))     // restriction to time=42.0
209    vec2 grad = ∇F([x,y]);                             // 2D gradient    vec2 grad = ∇F([x,y]);                             // 2D gradient
210    
 Tensors of order 3 (e.g. gradients of diffusion tensor fields, or  
 hessians of vector fields) and order 4 (e.g. Hessians of diffusion  
 tensor fields).  
   
211  representation of tensor symmetry  representation of tensor symmetry
212  (have to identify the group of index permutations that are symmetries)  (have to identify the group of index permutations that are symmetries)
213    
# Line 268  Line 253 
253  //  uncaught exception Size [size]  //  uncaught exception Size [size]
254  //    raised at c-target/c-target.sml:47.15-47.19  //    raised at c-target/c-target.sml:47.15-47.19
255  //field#4(3)[] F = img ⊛ bspln5;  //field#4(3)[] F = img ⊛ bspln5;
256    

Legend:
Removed from v.1257  
changed lines
  Added in v.1442

root@smlnj-gforge.cs.uchicago.edu
ViewVC Help
Powered by ViewVC 1.0.0