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[diderot] Annotation of /branches/pure-cfg/TODO
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Annotation of /branches/pure-cfg/TODO

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Revision 788 - (view) (download)

1 : glk 781 ========================
2 :     SHORT TERM ============= (for curvature-based VR)
3 :     ========================
4 :    
5 : jhr 788 IL support for higher-order tensor values (matrices, etc).
6 :     tensor construction
7 :     tensor indexing and slicing
8 :     verify that hessians work correctly
9 :    
10 : jhr 763 Outer products
11 :     syntax [DONE]
12 :     typechecking
13 :     IL and codegen
14 :    
15 :     Add M dot v, v dot M, and M dot N
16 :    
17 :     Identity matrix [DONE up to code generation]
18 :    
19 :     trace [DONE]
20 :    
21 : glk 785 extend norm (|exp|) to tensor[3,3]
22 : jhr 763
23 : jhr 788 Use ∇⊗ etc. syntax
24 : jhr 763 syntax [DONE]
25 :     typechecking
26 :     IL and codegen
27 :    
28 :     Add sequence types
29 :     syntax
30 :     types: ty '{' INT '}'
31 :     value construction: '{' e1 ',' … ',' en '}'
32 :     indexing: e '{' e '}'
33 :    
34 : jhr 784 Infix dot product and cross product [DONE]
35 : glk 781
36 : jhr 784 lerp on scalars and vectors [DONE]
37 :    
38 : glk 781 ==============================
39 : glk 785 other SHORT TERM ============= (including needed for LIC)
40 : glk 781 ==============================
41 :    
42 : glk 785 determinant ("det") for tensor[3,3]
43 :    
44 :     Decide if we want to allow redefinitions of variables
45 :     (as in vr-lite-cam.diderot)
46 :    
47 :     extend norm (|exp|) to all tensor types
48 :    
49 :     extend normalize to all tensor types
50 :    
51 : glk 781 vector fields: convolution on vector images
52 :    
53 : jhr 788 expand trace in mid to low translation
54 :    
55 :     value-numbering optimization
56 :    
57 :     Add type aliases for color types
58 :     rgb = real{3}
59 :     rgba = real{4}
60 :    
61 : glk 781 ==============================
62 :     MEDIUM TERM ================== (needed for streamlines & tractography)
63 :     ==============================
64 :    
65 :     ability to emit/track/record variables into dynamically re-sized
66 :     runtime buffer
67 :    
68 :     evals & evecs for symmetric tensor[3,3]
69 :    
70 :     tensor fields: convolution on general tensor images
71 :    
72 :     ==============================
73 :     other MEDIUM TERM ============ (needed for particles)
74 :     ==============================
75 :    
76 :     run-time birth and death of strands
77 :    
78 :     "initially" supports lists
79 :    
80 :     "initially" supports lists of positions output from
81 :     different initalization Diderot program
82 :    
83 :     spatial data structure that permits strands' queries of neighbors
84 :    
85 : jhr 784 proper handling of stabilize method
86 :    
87 : glk 781 ==============================
88 :     LONG TERM ====================
89 :     ==============================
90 :    
91 :     co- vs contra- index distinction
92 :    
93 : glk 783 add ":" for tensor dot product (contracts out two indices
94 :     instead of one like •), valid for all pairs of tensors with
95 :     at least two indices
96 :    
97 : glk 781 some indication of tensor symmetry
98 :     (have to identify the group of index permutations that are symmetries)
99 :    
100 :     dot works on all tensors
101 :    
102 :     outer works on all tensors
103 :    
104 :     Einstein summation notation
105 :    
106 :     "tensor comprehension" (like list comprehension)
107 : jhr 784
108 :     ======================
109 :     BUGS =================
110 :     ======================
111 :    
112 :     test/mip-cam.diderot:
113 :     // generated C code looks like "(float)p_ui_0--0.5e0f"
114 :     //real rayU = 2.0*camUmax*(real(ui) - -0.5)/real(imgResU) - camUmax;
115 :    
116 :     test/vr-kcomp.diderot:
117 :     // HEY (scoping BUG): the strand parameters (e.g. ui, vi) ...
118 :    
119 :     test/zslice2.diderot:
120 :     // but is this not valid syntax for creating field in one shot?
121 :     //field#2(3)[] F = (load("../data/zimg112.nrrd")) ⊛ bspln3;
122 :     // It is valid syntax, but there is a bug in the conversion from HighIL to MidIL
123 :    
124 :     test/zslice2.diderot:
125 :     // HEY (bug) bspln5 leads to problems ...
126 :     // uncaught exception Size [size]
127 :     // raised at c-target/c-target.sml:47.15-47.19
128 :     //field#4(3)[] F = img ⊛ bspln5;
129 :    
130 :    

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