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

SCM Repository

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

Diff of /branches/pure-cfg/TODO

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

revision 783, Thu Apr 7 23:44:08 2011 UTC revision 948, Fri Apr 22 19:19:03 2011 UTC
# Line 1  Line 1 
 ======================  
 BUGS =================  
 ======================  
   
 test/mip-cam.diderot:  
     // generated C code looks like "(float)p_ui_0--0.5e0f"  
     //real rayU = 2.0*camUmax*(real(ui) - -0.5)/real(imgResU) - camUmax;  
   
 test/vr-kcomp.diderot:  
     // HEY (scoping BUG): the strand parameters (e.g. ui, vi) ...  
   
 test/vr-kcomp.diderot:  
           // HEY (BUG) stabilize function not working  
           // setting rgba should be done there  
           rgba = [gray, gray, gray, 1.0-transp];  
   
 test/vr-lite-cam.diderot:  
 // HEY (BUG): these:  
 //   vec3 lightVspDir = [1.0, -0.0, 0.0];  
 //   vec3 lightVspDir = [1.0, 0.0, -0.0];  
 // work okay but this:  
 //   vec3 lightVspDir = [1.0, 0.0, 0.0]; ...  
   
 test/zslice2.diderot:  
 // but is this not valid syntax for creating field in one shot?  
 //field#2(3)[] F = (load("../data/zimg112.nrrd")) ⊛ bspln3;  
 // It is valid syntax, but there is a bug in the conversion from HighIL to MidIL  
   
 test/zslice2.diderot:  
 // HEY (bug) bspln5 leads to problems ...  
 //  uncaught exception Size [size]  
 //    raised at c-target/c-target.sml:47.15-47.19  
 //field#4(3)[] F = img ⊛ bspln5;  
   
1  ========================  ========================
2  SHORT TERM =============  (for curvature-based VR)  SHORT TERM =============  (for curvature-based VR)
3  ========================  ========================
4    
5  Outer products  IL support for higher-order tensor values (matrices, etc).
6      syntax [DONE]      tensor construction [DONE]
7      typechecking      tensor indexing [DONE]
8      IL and codegen      tensor slicing
9        verify that hessians work correctly [DONE]
10    
11  Add M dot v, v dot M, and M dot N  Outer products [DONE]
12    
13  Identity matrix [DONE up to code generation]  Add M dot v, v dot M, and M dot N [DONE]
14    
15  determinant ("det") for tensor[3,3]  Identity matrix [DONE]
16    
17  trace [DONE]  Zero tensor [DONE]
18    
19  expand trace in mid to low translation  trace [DONE]
20    
21  extend norm (|exp|) to all tensor types  extend norm (|exp|) to tensor[3,3] [DONE]
22    
23  extend normalize to all tensor types  Matrix addition, subtraction, and scaling  [DONE]
24    
25  Use ∇⊗ etc syntax  Use ∇⊗ etc. syntax
26      syntax [DONE]      syntax [DONE]
27      typechecking      typechecking
28      IL and codegen      IL and codegen
# Line 66  Line 33 
33          value construction: '{' e1 ',' … ',' en '}'          value construction: '{' e1 ',' … ',' en '}'
34          indexing: e '{' e '}'          indexing: e '{' e '}'
35    
36  IL support for higher-order tensor values (matrices, etc).  Infix dot product and cross product [DONE]
     tensor construction  
     tensor indexing and slicing  
     verify that hessians work correctly  
   
 Add type aliases for color types  
     rgb = real{3}  
     rgba = real{4}  
37    
38  stabilize {} code block  lerp on scalars and vectors [DONE]
39    
40  Decide if we want to allow redefinitions of variables  Infix "^" operator for pow() [DONE]
   (as in vr-lite-cam.diderot)  
41    
42  DONE:  Code generation support for 1D image data, such as RGBA transfer functions [DONE]
   Infix dot product and cross product  
   lerp on scalars and vectors  
43    
44  ==============================  ==============================
45  other SHORT TERM =============  (needed for LIC)  other SHORT TERM =============  (including needed for LIC)
46  ==============================  ==============================
47    
48  vector fields: convolution on vector images  test/uninit.diderot:
49    documents need for better compiler error messages when output variables
50    are not initialized; the current messages are very cryptic
51    
52    determinant ("det") for tensor[3,3]
53    
54    extend norm (|exp|) to all tensor types [DONE for vectors and matrices]
55    
56    expand trace in mid to low translation
57    
58    value-numbering optimization
59    
60    Add type aliases for color types
61        rgb = real{3}
62        rgba = real{4}
63    
64  ==============================  ==============================
65  MEDIUM TERM ================== (needed for streamlines & tractography)  MEDIUM TERM ================== (including needed for streamlines & tractography)
66  ==============================  ==============================
67    
68    Want: allow X *= Y, X /= Y, X += Y, X -= Y to mean what they do in C,
69    provided that X*Y, X/Y, X+Y, X-Y are already supported.
70    Nearly every Diderot program would be simplified by this.
71    
72    Want: ability to apply "normalize" to a field itself, e.g.
73      field#1(2)[2] V = normalize(Vimg ⊛ ctmr);
74    so that V(x) = normalize((Vimg ⊛ ctmr)(x)).
75    (For now, it would be okay for the differentability of V to be 0;
76    later we can teach Diderot the quotient rule of derivatives.)
77    Having this would simplify expression of standard LIC method, and
78    would also help express other vector field expressions that arise
79    in vector field feature exraction
80    Related to this and possibly simpler:
81      image(2)[2] Vimg = load(...);
82      field#1(2)[] Vlen = |Vimg ⊛ ctmr|;
83    to get a scalar field of vector length, or
84      field#1(2)[] F = Fimg ⊛ ctmr;
85      field#1(2)[] Gmag = |∇F|;
86    to get a scalar field of gradient magnitude, or
87      field#1(2)[] F = Fimg ⊛ ctmr;
88      field#1(2)[] Gmag = ∇F•∇F;
89    to get a scalar field of squared gradient magnitude
90    (which is simpler to differentiate)
91    
92    ability to declare a field in such a way so that probe
93    positions are *always* clamped to the support of "inside";
94    there are many cases where this is the sensible behavior
95    
96  ability to emit/track/record variables into dynamically re-sized  ability to emit/track/record variables into dynamically re-sized
97  runtime buffer  runtime buffer
98    
# Line 101  Line 100 
100    
101  tensor fields: convolution on general tensor images  tensor fields: convolution on general tensor images
102    
103    Use of Teem's "hest" command-line parser for getting
104    any input variables that are not defined in the source file
105    
106    Save Diderot output to nrrd, instead of "mip.txt"
107      For grid of strands, save to similarly-shaped array
108      For list of strands, save to long 1-D (or 2-D for non-scalar output) list
109      For ragged things (like tractography output), will need to save both
110        complete list of values, as well as list of start indices and lengths
111        to index into complete list
112    
113  ==============================  ==============================
114  other MEDIUM TERM ============ (needed for particles)  other MEDIUM TERM ============ (needed for particles)
115  ==============================  ==============================
# Line 114  Line 123 
123    
124  spatial data structure that permits strands' queries of neighbors  spatial data structure that permits strands' queries of neighbors
125    
126    proper handling of stabilize method
127    
128    test/vr-kcomp2.diderot: Add support for code like
129    
130            (F1 if x else F2)@pos
131    
132    This will require duplication of the continuation of the conditional (but we should only
133    duplicate over the live-range of the result of the conditional.
134    
135    ==============================
136    other MEDIUM TERM ============
137    ==============================
138    
139    want: warnings when "D" (reserved for differentiation) is declared as
140    a variable name (get confusing error messages now)
141    
142    support for Python interop and GUI
143    
144  ==============================  ==============================
145  LONG TERM ====================  LONG TERM ====================
146  ==============================  ==============================
147    
148    Better handling of variables that determines the scope of a variable
149    based on its actual use, instead of where the user defined it.  So,
150    for example, we should lift strand-invariant variables to global
151    scope.  Also prune out useless variables, which should include field
152    variables after the translation to mid-il.
153    
154  co- vs contra- index distinction  co- vs contra- index distinction
155    
156  add ":" for tensor dot product (contracts out two indices  add ":" for tensor dot product (contracts out two indices
# Line 134  Line 167 
167  Einstein summation notation  Einstein summation notation
168    
169  "tensor comprehension" (like list comprehension)  "tensor comprehension" (like list comprehension)
170    
171    Python/ctypes interface to run-timez
172    
173    ======================
174    BUGS =================
175    ======================
176    
177    test/fields.diderot:
178    documents various bugs/questions associated with field expressions
179    
180    test/mip-cam.diderot:
181        // generated C code looks like "(float)p_ui_0--0.5e0f"
182        //real rayU = 2.0*camUmax*(real(ui) - -0.5)/real(imgResU) - camUmax;
183    
184    test/vr-kcomp.diderot:
185        // HEY (scoping BUG): the strand parameters (e.g. ui, vi) ...
186    
187    test/zslice2.diderot:
188    // but is this not valid syntax for creating field in one shot?
189    //field#2(3)[] F = (load("../data/zimg112.nrrd")) ⊛ bspln3;
190    // It is valid syntax, but there is a bug in the conversion from HighIL to MidIL
191    
192    test/zslice2.diderot:
193    // HEY (bug) bspln5 leads to problems ...
194    //  uncaught exception Size [size]
195    //    raised at c-target/c-target.sml:47.15-47.19
196    //field#4(3)[] F = img ⊛ bspln5;

Legend:
Removed from v.783  
changed lines
  Added in v.948

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