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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 813, Tue Apr 12 18:02:15 2011 UTC revision 947, Fri Apr 22 14:54:00 2011 UTC
# Line 2  Line 2 
2  SHORT TERM =============  (for curvature-based VR)  SHORT TERM =============  (for curvature-based VR)
3  ========================  ========================
4    
 For RGB color output of 2D transfer function (indexed by  
 kappa1,kappa2), or for a 1D transfer function, will need  
 something akin to convolution on vector images  
   
5  IL support for higher-order tensor values (matrices, etc).  IL support for higher-order tensor values (matrices, etc).
6      tensor construction [DONE]      tensor construction [DONE]
7      tensor indexing [DONE]      tensor indexing [DONE]
8      tensor slicing      tensor slicing
9      verify that hessians work correctly      verify that hessians work correctly [DONE]
10    
11  Outer products  Outer products [DONE]
     syntax [DONE]  
     typechecking  
     IL and codegen  
12    
13  Add M dot v, v dot M, and M dot N [DONE]  Add M dot v, v dot M, and M dot N [DONE]
14    
15  Identity matrix [DONE up to code generation]  Identity matrix [DONE]
16    
17    Zero tensor [DONE]
18    
19  trace [DONE]  trace [DONE]
20    
21  extend norm (|exp|) to tensor[3,3]  extend norm (|exp|) to tensor[3,3] [DONE]
22    
23    Matrix addition, subtraction, and scaling  [DONE]
24    
25  Use ∇⊗ etc. syntax  Use ∇⊗ etc. syntax
26      syntax [DONE]      syntax [DONE]
# Line 40  Line 37 
37    
38  lerp on scalars and vectors [DONE]  lerp on scalars and vectors [DONE]
39    
40    Infix "^" operator for pow() [DONE]
41    
42    Code generation support for 1D image data, such as RGBA transfer functions [DONE]
43    
44  ==============================  ==============================
45  other SHORT TERM =============  (including needed for LIC)  other SHORT TERM =============  (including needed for LIC)
46  ==============================  ==============================
47    
48  determinant ("det") for tensor[3,3]  test/uninit.diderot:
49    documents need for better compiler error messages when output variables
50  Decide if we want to allow redefinitions of variables  are not initialized; the current messages are very cryptic
   (as in vr-lite-cam.diderot)  
51    
52  extend norm (|exp|) to all tensor types  determinant ("det") for tensor[3,3]
   
 extend normalize to all tensor types  
53    
54  vector fields: convolution on vector images  extend norm (|exp|) to all tensor types [DONE for vectors and matrices]
55    
56  expand trace in mid to low translation  expand trace in mid to low translation
57    
# Line 64  Line 62 
62      rgba = real{4}      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    
81    ability to declare a field in such a way so that probe
82    positions are *always* clamped to the support of "inside";
83    there are many cases where this is the sensible behavior
84    
85  ability to emit/track/record variables into dynamically re-sized  ability to emit/track/record variables into dynamically re-sized
86  runtime buffer  runtime buffer
87    
# Line 74  Line 89 
89    
90  tensor fields: convolution on general tensor images  tensor fields: convolution on general tensor images
91    
92    Use of Teem's "hest" command-line parser for getting
93    any input variables that are not defined in the source file
94    
95    Save Diderot output to nrrd, instead of "mip.txt"
96      For grid of strands, save to similarly-shaped array
97      For list of strands, save to long 1-D (or 2-D for non-scalar output) list
98      For ragged things (like tractography output), will need to save both
99        complete list of values, as well as list of start indices and lengths
100        to index into complete list
101    
102  ==============================  ==============================
103  other MEDIUM TERM ============ (needed for particles)  other MEDIUM TERM ============ (needed for particles)
104  ==============================  ==============================
# Line 89  Line 114 
114    
115  proper handling of stabilize method  proper handling of stabilize method
116    
117  Add support for code like  test/vr-kcomp2.diderot: Add support for code like
118    
119          (F1 if x else F2)@pos          (F1 if x else F2)@pos
120    
# Line 100  Line 125 
125  other MEDIUM TERM ============  other MEDIUM TERM ============
126  ==============================  ==============================
127    
128  support fog Python interop and GUI  want: warnings when "D" (reserved for differentiation) is declared as
129    a variable name (get confusing error messages now)
130    
131    support for Python interop and GUI
132    
133  ==============================  ==============================
134  LONG TERM ====================  LONG TERM ====================
135  ==============================  ==============================
136    
137  Better handling of variables that determines the scope of a variable based on its actual use,  Better handling of variables that determines the scope of a variable
138  instead of where the user defined it.  So, for example, we should lift strand-invariant variables  based on its actual use, instead of where the user defined it.  So,
139  to global scope.  Also prune out useless variables, which should include field variables after the  for example, we should lift strand-invariant variables to global
140  translation to mid-il.  scope.  Also prune out useless variables, which should include field
141    variables after the translation to mid-il.
142    
143  co- vs contra- index distinction  co- vs contra- index distinction
144    
# Line 128  Line 157 
157    
158  "tensor comprehension" (like list comprehension)  "tensor comprehension" (like list comprehension)
159    
160    Python/ctypes interface to run-timez
161    
162  ======================  ======================
163  BUGS =================  BUGS =================
164  ======================  ======================
165    
166    test/fields.diderot:
167    documents various bugs/questions associated with field expressions
168    
169  test/mip-cam.diderot:  test/mip-cam.diderot:
170      // generated C code looks like "(float)p_ui_0--0.5e0f"      // generated C code looks like "(float)p_ui_0--0.5e0f"
171      //real rayU = 2.0*camUmax*(real(ui) - -0.5)/real(imgResU) - camUmax;      //real rayU = 2.0*camUmax*(real(ui) - -0.5)/real(imgResU) - camUmax;
# Line 149  Line 183 
183  //  uncaught exception Size [size]  //  uncaught exception Size [size]
184  //    raised at c-target/c-target.sml:47.15-47.19  //    raised at c-target/c-target.sml:47.15-47.19
185  //field#4(3)[] F = img ⊛ bspln5;  //field#4(3)[] F = img ⊛ bspln5;
   
   

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