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Messages 2304 - 2335 of 4038   Oldest  |  < Older  |  Newer >  |  Newest
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2304
Hi Roger ... As a compromise, if you are normally scanning in lines parallel to the x-axis. Then you would only need to store the current and previous two...
Adrian Rossiter
adrianrossiter
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Nov 1, 2008
9:56 am
2305
Hi Steve ... Does your FCC cell have a point at its centre? (If not, what was the calculation that gave the volume of 0.5?) ... They are included in the...
Adrian Rossiter
adrianrossiter
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Nov 1, 2008
10:23 am
2306
Hi Roger ... This is a bug, here is the offending line (twice) geom.get_verts()->push_back(vec3d(i, k, j)); I must learn the alphabet! Adrian. -- Adrian...
Adrian Rossiter
adrianrossiter
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Nov 1, 2008
10:49 am
2307
Hi Roger ... I will take a look at the program next week. Adrian. -- Adrian Rossiter adrian@... http://antiprism.com/adrian...
Adrian Rossiter
adrianrossiter
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Nov 1, 2008
10:57 am
2308
Adrian, ... 1x1xroot2....having exactly a volume of 0.5. That was wrong...geez...it is rather 1 x root2 x root2 edges for the fcc that yield its .5 volume. ...
stevewaterman51
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Nov 1, 2008
11:38 am
2309
Hi Steve ... But then 1 x root2 x root2 = 2 Does the cell you are thinking of have a point at its centre? ... Could you explain how you are doing this. Adrian....
Adrian Rossiter
adrianrossiter
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Nov 1, 2008
11:49 am
2310
Roger, In order to make that explosion program relevant to v,f,e,c it seems that since face centering is part and parcel of Antiprism already, that e and v and...
stevewaterman51
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Nov 1, 2008
12:42 pm
2311
Adrian, ... Good question. i am confusing myself completely here. I have a drawing of an sc 1x1x1 cell. On the front face...i have drawn a square of edge root...
stevewaterman51
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Nov 1, 2008
1:01 pm
2312
Hi Steve ... FCC is normlly thought of as having points on the face centres of the cubes. If you think of it as cuboctahedral arrangement of balls on the cubes...
Adrian Rossiter
adrianrossiter
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Nov 1, 2008
3:41 pm
2313
Sorry, my brain has gotten up on the wrong side of bed ...this morning ... "In a lattice a primitive cell is a parallelepiped with vertices on lattice points,...
stevewaterman51
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Nov 1, 2008
4:42 pm
2314
Hi Steve, ... Actually this sort of thing has been requested in Stella for a long while and has never been done. With good specs, this doesn't seem like it...
vortexswirling
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Nov 1, 2008
5:18 pm
2315
Hi Adrian, ... Realizing the z-points are tangent when they are equal to z of the centroid, I am rather anxious to put this into the z-intercept function....
vortexswirling
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Nov 1, 2008
7:57 pm
2316
Hi Adrian, ... I quickly tried it this morning. The code change replaced the doubleEquality with an integer comparison z_near =...
vortexswirling
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Nov 2, 2008
1:14 pm
2317
Hi Adrian, Using if (z_near == (int)floor(cz+epsilon)) { makes the function more reliable so I will let it in. It tests the same as the previous floating...
vortexswirling
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Nov 2, 2008
9:44 pm
2318
Adrian and Roger, I mentioned that I was going to look on the net for some other poly packings. I found this interesting site... ...
stevewaterman51
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Nov 3, 2008
1:17 pm
2319
Hi Adrian, (I wrote this note in Yahoo groups itself earlier and it ended up being rejected and sent to my email in box) ... long ... for ... enough ... Some...
vortexswirling
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Nov 3, 2008
2:47 pm
2320
Hi Adrian, ... I just got this. I think you are saying there is an iterative method to find z. Roger...
vortexswirling
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Nov 3, 2008
9:51 pm
2323
Hi Roger ... That is right. Use the z values that you currently find as a starting point. Then, using long long integers, check each value to see if it is...
Adrian Rossiter
adrianrossiter
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Nov 4, 2008
2:45 pm
2324
Hi Steve ... You are very welcome, and Kentyn is also welcome to use the source in his own program (permission is granted by the MIT Licence which is included...
Adrian Rossiter
adrianrossiter
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Nov 4, 2008
3:00 pm
2325
Hi Steve ... All parallelepipeds will tile space. Adrian. -- Adrian Rossiter adrian@... http://antiprism.com/adrian...
Adrian Rossiter
adrianrossiter
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Nov 4, 2008
3:37 pm
2326
Adrian, ... Thanks Adrian, indeed for already making this all public. I will see if he cares to join the forum at Antiprism next. I have only his initial...
stevewaterman51
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Nov 4, 2008
4:15 pm
2327
Hi Adrian, ... the ... When you say long long integers there are several that come to mind. Which are available to c++. I thought the 18 quintillion variety...
vortexswirling
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Nov 4, 2008
4:17 pm
2328
Hi Roger ... You are right! I think g++ supports it, but for any distribution the calculations would really need to be done in C. ... It isn't really different...
Adrian Rossiter
adrianrossiter
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Nov 4, 2008
5:08 pm
2329
Hi Adrian, ... was ... Would the whole program need to be extern C then? What is the highest available then, unsigned int? (unsigned long... I think long and...
vortexswirling
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Nov 4, 2008
6:46 pm
2330
Hi, There is an error in bravais extended help. I will edit it by something like this. Deleting the lines: "But this same logic would also argue that Face...
vortexswirling
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Nov 5, 2008
1:34 am
2331
Hi Roger ... I will add in the changes. Adrian. -- Adrian Rossiter adrian@... http://antiprism.com/adrian...
Adrian Rossiter
adrianrossiter
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Nov 5, 2008
11:06 am
2332
Hi Roger ... Just the code that used long long would have to go into a C file, and this could be linked against the other C++ code. ... An int is at least as...
Adrian Rossiter
adrianrossiter
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Nov 5, 2008
11:37 am
2333
Hi Adrian, ... The actual printf's are below. I changed the wording a bit from last night. I decided not to introduce FCT and BCT as the program doesn't take...
vortexswirling
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Nov 5, 2008
11:56 am
2334
Hi, The Bravais vector and angle transformations of a=b=c and alpha=beta<>90<>gamma fits the Triclinic description. But Triclinic does not have 2 fold ...
vortexswirling
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Nov 5, 2008
12:52 pm
2335
Hi Adrian, I have the angles alpha, beta, and gamma parallel to vectors a,b,c (which I correspond to x,y,z). But the convention is to have them perpendicular...
vortexswirling
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Nov 5, 2008
3:37 pm
Messages 2304 - 2335 of 4038   Oldest  |  < Older  |  Newer >  |  Newest
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