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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 783, Thu Apr 7 23:44:08 2011 UTC
# Line 1  Line 1 
1    ======================
2    BUGS =================
3    ======================
4    
5    test/mip-cam.diderot:
6        // generated C code looks like "(float)p_ui_0--0.5e0f"
7        //real rayU = 2.0*camUmax*(real(ui) - -0.5)/real(imgResU) - camUmax;
8    
9    test/vr-kcomp.diderot:
10        // HEY (scoping BUG): the strand parameters (e.g. ui, vi) ...
11    
12    test/vr-kcomp.diderot:
13              // HEY (BUG) stabilize function not working
14              // setting rgba should be done there
15              rgba = [gray, gray, gray, 1.0-transp];
16    
17    test/vr-lite-cam.diderot:
18    // HEY (BUG): these:
19    //   vec3 lightVspDir = [1.0, -0.0, 0.0];
20    //   vec3 lightVspDir = [1.0, 0.0, -0.0];
21    // work okay but this:
22    //   vec3 lightVspDir = [1.0, 0.0, 0.0]; ...
23    
24    test/zslice2.diderot:
25    // but is this not valid syntax for creating field in one shot?
26    //field#2(3)[] F = (load("../data/zimg112.nrrd")) ⊛ bspln3;
27    // It is valid syntax, but there is a bug in the conversion from HighIL to MidIL
28    
29    test/zslice2.diderot:
30    // HEY (bug) bspln5 leads to problems ...
31    //  uncaught exception Size [size]
32    //    raised at c-target/c-target.sml:47.15-47.19
33    //field#4(3)[] F = img ⊛ bspln5;
34    
35    ========================
36    SHORT TERM =============  (for curvature-based VR)
37    ========================
38    
39  Outer products  Outer products
40      syntax [DONE]      syntax [DONE]
41      typechecking      typechecking
# Line 7  Line 45 
45    
46  Identity matrix [DONE up to code generation]  Identity matrix [DONE up to code generation]
47    
48    determinant ("det") for tensor[3,3]
49    
50  trace [DONE]  trace [DONE]
51    
52  expand trace in mid to low translation  expand trace in mid to low translation
53    
54  extend norm (|exp|) to all tensor types  extend norm (|exp|) to all tensor types
55    
56  Infix dot product and cross product [DONE]  extend normalize to all tensor types
   
 lerp on scalars and vectors [DONE]  
57    
58  Use ∇⊗ etc syntax  Use ∇⊗ etc syntax
59      syntax [DONE]      syntax [DONE]
# Line 31  Line 69 
69  IL support for higher-order tensor values (matrices, etc).  IL support for higher-order tensor values (matrices, etc).
70      tensor construction      tensor construction
71      tensor indexing and slicing      tensor indexing and slicing
72        verify that hessians work correctly
73    
74  Add type aliases for color types  Add type aliases for color types
75      rgb = real{3}      rgb = real{3}
76      rgba = real{4}      rgba = real{4}
77    
78    stabilize {} code block
79    
80    Decide if we want to allow redefinitions of variables
81      (as in vr-lite-cam.diderot)
82    
83    DONE:
84      Infix dot product and cross product
85      lerp on scalars and vectors
86    
87    ==============================
88    other SHORT TERM =============  (needed for LIC)
89    ==============================
90    
91    vector fields: convolution on vector images
92    
93    ==============================
94    MEDIUM TERM ================== (needed for streamlines & tractography)
95    ==============================
96    
97    ability to emit/track/record variables into dynamically re-sized
98    runtime buffer
99    
100    evals & evecs for symmetric tensor[3,3]
101    
102    tensor fields: convolution on general tensor images
103    
104    ==============================
105    other MEDIUM TERM ============ (needed for particles)
106    ==============================
107    
108    run-time birth and death of strands
109    
110    "initially" supports lists
111    
112    "initially" supports lists of positions output from
113    different initalization Diderot program
114    
115    spatial data structure that permits strands' queries of neighbors
116    
117    ==============================
118    LONG TERM ====================
119    ==============================
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)

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