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

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