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

# Diff of /branches/pure-cfg/TODO

revision 763, Thu Apr 7 19:57:56 2011 UTC revision 797, Mon Apr 11 19:01:06 2011 UTC
# Line 1  Line 1
1    ========================
2    SHORT TERM =============  (for curvature-based VR)
3    ========================
4
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    IL support for higher-order tensor values (matrices, etc).
10        tensor construction
11        tensor indexing and slicing
12        verify that hessians work correctly
13
14  Outer products  Outer products
15      syntax [DONE]      syntax [DONE]
16      typechecking      typechecking
# Line 9  Line 22
22
23  trace [DONE]  trace [DONE]
24
25  expand trace in mid to low translation  extend norm (|exp|) to tensor[3,3]

extend norm (|exp|) to all tensor types
26
27  Infix dot product and cross product [DONE]  Use ∇⊗ etc. syntax

lerp on scalars and vectors [DONE]

Use ∇⊗ etc syntax
28      syntax [DONE]      syntax [DONE]
29      typechecking      typechecking
30      IL and codegen      IL and codegen
# Line 28  Line 35
35          value construction: '{' e1 ',' … ',' en '}'          value construction: '{' e1 ',' … ',' en '}'
36          indexing: e '{' e '}'          indexing: e '{' e '}'
37
38  IL support for higher-order tensor values (matrices, etc).  Infix dot product and cross product [DONE]
39      tensor construction
40      tensor indexing and slicing  lerp on scalars and vectors [DONE]
41
42    ==============================
43    other SHORT TERM =============  (including needed for LIC)
44    ==============================
45
46    determinant ("det") for tensor[3,3]
47
48    Decide if we want to allow redefinitions of variables
49      (as in vr-lite-cam.diderot)
50
51    extend norm (|exp|) to all tensor types
52
53    extend normalize to all tensor types
54
55    vector fields: convolution on vector images
56
57    expand trace in mid to low translation
58
59    value-numbering optimization
60
61  Add type aliases for color types  Add type aliases for color types
62      rgb = real{3}      rgb = real{3}
63      rgba = real{4}      rgba = real{4}
64
65    ==============================
66    MEDIUM TERM ================== (needed for streamlines & tractography)
67    ==============================
68
69    ability to emit/track/record variables into dynamically re-sized
70    runtime buffer
71
72    evals & evecs for symmetric tensor[3,3]
73
74    tensor fields: convolution on general tensor images
75
76    ==============================
77    other MEDIUM TERM ============ (needed for particles)
78    ==============================
79
80    run-time birth and death of strands
81
82    "initially" supports lists
83
84    "initially" supports lists of positions output from
85    different initalization Diderot program
86
87    spatial data structure that permits strands' queries of neighbors
88
89    proper handling of stabilize method
90
91    Add support for code like
92
93            (F1 if x else F2)@pos
94
95    This will require duplication of the continuation of the conditional (but we should only
96    duplicate over the live-range of the result of the conditional.
97
98    ==============================
99    other MEDIUM TERM ============
100    ==============================
101
102    support fog Python interop and GUI
103
104    ==============================
105    LONG TERM ====================
106    ==============================
107
108    Better handling of variables that determines the scope of a variable based on its actual use,
109    instead of where the user defined it.  So, for example, we should lift strand-invariant variables
110    to global scope.  Also prune out useless variables, which should include field variables after the
111    translation to mid-il.
112
113    co- vs contra- index distinction
114
115    add ":" for tensor dot product (contracts out two indices
116    instead of one like •), valid for all pairs of tensors with
117    at least two indices
118
119    some indication of tensor symmetry
120    (have to identify the group of index permutations that are symmetries)
121
122    dot works on all tensors
123
124    outer works on all tensors
125
126    Einstein summation notation
127
128    "tensor comprehension" (like list comprehension)
129
130    ======================
131    BUGS =================
132    ======================
133
134    test/mip-cam.diderot:
135        // generated C code looks like "(float)p_ui_0--0.5e0f"
136        //real rayU = 2.0*camUmax*(real(ui) - -0.5)/real(imgResU) - camUmax;
137
138    test/vr-kcomp.diderot:
139        // HEY (scoping BUG): the strand parameters (e.g. ui, vi) ...
140
141    test/zslice2.diderot:
142    // but is this not valid syntax for creating field in one shot?
143    //field#2(3)[] F = (load("../data/zimg112.nrrd")) ⊛ bspln3;
144    // It is valid syntax, but there is a bug in the conversion from HighIL to MidIL
145
146    test/zslice2.diderot:
147    // HEY (bug) bspln5 leads to problems ...
148    //  uncaught exception Size [size]
149    //    raised at c-target/c-target.sml:47.15-47.19
150    //field#4(3)[] F = img ⊛ bspln5;
151
152

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