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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 763, Thu Apr 7 19:57:56 2011 UTC revision 853, Tue Apr 19 16:34:55 2011 UTC
# Line 1  Line 1 
1  Outer products  ========================
2      syntax [DONE]  SHORT TERM =============  (for curvature-based VR)
3      typechecking  ========================
4      IL and codegen  
5    For RGB color output of 2D transfer function (indexed by
6    kappa1,kappa2), or for a 1D transfer function, will need
7    something akin to convolution on vector images
8    
9  Add M dot v, v dot M, and M dot N  IL support for higher-order tensor values (matrices, etc).
10        tensor construction [DONE]
11        tensor indexing [DONE]
12        tensor slicing
13        verify that hessians work correctly [DONE]
14    
15  Identity matrix [DONE up to code generation]  Outer products [DONE]
16    
17  trace [DONE]  Add M dot v, v dot M, and M dot N [DONE]
18    
19  expand trace in mid to low translation  Identity matrix [DONE]
20    
21  extend norm (|exp|) to all tensor types  Zero tensor [DONE]
22    
23  Infix dot product and cross product [DONE]  trace [DONE]
24    
25  lerp on scalars and vectors [DONE]  extend norm (|exp|) to tensor[3,3] [DONE]
26    
27  Use ∇⊗ etc syntax  Matrix addition, subtraction, and scaling  [DONE]
28    
29    Use ∇⊗ etc. syntax
30      syntax [DONE]      syntax [DONE]
31      typechecking      typechecking
32      IL and codegen      IL and codegen
# Line 28  Line 37 
37          value construction: '{' e1 ',' … ',' en '}'          value construction: '{' e1 ',' … ',' en '}'
38          indexing: e '{' e '}'          indexing: e '{' e '}'
39    
40  IL support for higher-order tensor values (matrices, etc).  Infix dot product and cross product [DONE]
41      tensor construction  
42      tensor indexing and slicing  lerp on scalars and vectors [DONE]
43    
44    Infix "^" operator for pow() [DONE]
45    
46    Code generation support for 1D image data, such as RGBA transfer functions
47    
48    ==============================
49    other SHORT TERM =============  (including needed for LIC)
50    ==============================
51    
52    determinant ("det") for tensor[3,3]
53    
54    Decide if we want to allow redefinitions of variables
55      (as in vr-lite-cam.diderot)
56    
57    extend norm (|exp|) to all tensor types
58    
59    extend normalize to all tensor types
60    
61    vector fields: convolution on vector images [DONE]
62    
63    expand trace in mid to low translation
64    
65    value-numbering optimization
66    
67  Add type aliases for color types  Add type aliases for color types
68      rgb = real{3}      rgb = real{3}
69      rgba = real{4}      rgba = real{4}
70    
71    ==============================
72    MEDIUM TERM ================== (needed for streamlines & tractography)
73    ==============================
74    
75    ability to emit/track/record variables into dynamically re-sized
76    runtime buffer
77    
78    evals & evecs for symmetric tensor[3,3]
79    
80    tensor fields: convolution on general tensor images
81    
82    ==============================
83    other MEDIUM TERM ============ (needed for particles)
84    ==============================
85    
86    run-time birth and death of strands
87    
88    "initially" supports lists
89    
90    "initially" supports lists of positions output from
91    different initalization Diderot program
92    
93    spatial data structure that permits strands' queries of neighbors
94    
95    proper handling of stabilize method
96    
97    Add support for code like
98    
99            (F1 if x else F2)@pos
100    
101    This will require duplication of the continuation of the conditional (but we should only
102    duplicate over the live-range of the result of the conditional.
103    
104    ==============================
105    other MEDIUM TERM ============
106    ==============================
107    
108    want: warnings when D (and likely I) is declared as a
109    variable name (now get confusing error messages now)
110    
111    support for Python interop and GUI
112    
113    ==============================
114    LONG TERM ====================
115    ==============================
116    
117    Better handling of variables that determines the scope of a variable based on its actual use,
118    instead of where the user defined it.  So, for example, we should lift strand-invariant variables
119    to global scope.  Also prune out useless variables, which should include field variables after the
120    translation to mid-il.
121    
122    co- vs contra- index distinction
123    
124    add ":" for tensor dot product (contracts out two indices
125    instead of one like •), valid for all pairs of tensors with
126    at least two indices
127    
128    some indication of tensor symmetry
129    (have to identify the group of index permutations that are symmetries)
130    
131    dot works on all tensors
132    
133    outer works on all tensors
134    
135    Einstein summation notation
136    
137    "tensor comprehension" (like list comprehension)
138    
139    Python/ctypes interface to run-timez
140    
141    ======================
142    BUGS =================
143    ======================
144    
145    test/mip-cam.diderot:
146        // generated C code looks like "(float)p_ui_0--0.5e0f"
147        //real rayU = 2.0*camUmax*(real(ui) - -0.5)/real(imgResU) - camUmax;
148    
149    test/vr-kcomp.diderot:
150        // HEY (scoping BUG): the strand parameters (e.g. ui, vi) ...
151    
152    test/zslice2.diderot:
153    // but is this not valid syntax for creating field in one shot?
154    //field#2(3)[] F = (load("../data/zimg112.nrrd")) ⊛ bspln3;
155    // It is valid syntax, but there is a bug in the conversion from HighIL to MidIL
156    
157    test/zslice2.diderot:
158    // HEY (bug) bspln5 leads to problems ...
159    //  uncaught exception Size [size]
160    //    raised at c-target/c-target.sml:47.15-47.19
161    //field#4(3)[] F = img ⊛ bspln5;
162    
163    

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