992 posts
Posted 07 November 2012 - 12:30 AM
http://pastebin.com/YigPX1A3So something is wrong with gravity the X Y is fine but Z is a pain.
usage place a radar on top of a computer ant run this program. If you have problems with power low error then run the radar from batteries not directly from generators.
any help would be useful.
Thanks in advance
1054 posts
Posted 07 November 2012 - 01:36 AM
You have very few comments in your code, so it takes me a while to figure out what you're doing. :P/>/> If you're thinking about actually predicting the trajectory.. I decompiled ICBM last week to look into that. The code was mostly in Japanese >.< but I came to the conclusion that the 'parabola' isn't physically correct. I also read a post from the author once, kinda saying the same thing. Also, wouldn't you need velocity and starting angle to calculate the trajectory as well?
236 posts
Location
Germany
Posted 07 November 2012 - 04:48 AM
You have very few comments in your code, so it takes me a while to figure out what you're doing. :P/>/> If you're thinking about actually predicting the trajectory.. I decompiled ICBM last week to look into that. The code was mostly in Japanese >.< but I came to the conclusion that the 'parabola' isn't physically correct. I also read a post from the author once, kinda saying the same thing. Also, wouldn't you need velocity and starting angle to calculate the trajectory as well?
how is java Japanese o.O
1214 posts
Location
The Sammich Kingdom
Posted 07 November 2012 - 07:21 AM
You have very few comments in your code, so it takes me a while to figure out what you're doing. :P/>/> If you're thinking about actually predicting the trajectory.. I decompiled ICBM last week to look into that. The code was mostly in Japanese >.< but I came to the conclusion that the 'parabola' isn't physically correct. I also read a post from the author once, kinda saying the same thing. Also, wouldn't you need velocity and starting angle to calculate the trajectory as well?
how is java Japanese o.O
Not sure if he means the comment or if there is a Japanese version of Java, or maybe the code is impossible to read so he uses that as a metaphor.
537 posts
Location
Copenhagen, Denmark
Posted 07 November 2012 - 07:38 AM
Just use a constant X and Y velocity, and for Z, you will do something like this:
g is in this case 9.8
velZ = velZ + g * 0.16 -- 0.16 is equal to about 60 FPS
Then, to find the rotation of the object, you would do this:
local _x = lastX - x
local _y = lastY - y
local len = math.sqrt(_x ^ 2 + _y ^ 2)
rotation = math.acos(_x / len)
if y < lastY then
rotation = 2 * math.pi - rotation
end
radians = 2 * pi - rotation
rotation = math.deg(radians) -- get rotation in degrees
lastX, lastY = x, y
You would apply this to x/z as well, and so on…
To apply all of this to the current game state, do this:
x = x + velX
y = y + velY
z = z + velZ
2447 posts
Posted 07 November 2012 - 08:31 AM
The author of ICBM deliberately uses words in a language other than English in order to confuse people decompiling it - as he had been bitten by people stealing code before.
992 posts
Posted 07 November 2012 - 11:05 AM
I did some testing on the flight path the rate of change over time on the X and Y is a constant so i gain that by averaging the difference between data points in the set. my problem is following the curve current accuracy is about 400 meters.data recorded from a real ICBM launch using Computer craft.
data set
Spoiler
1.5 4.06 1.5
1.5 4.492 1.5
1.5 5.128 1.5
1.5 6.16 1.5
1.5 7.684 1.5
1.5 9.796 1.5
1.5 12.592 1.5
1.5 16.168 1.5
1.5 18.22 1.5
2.4999955 21.529955 1.496991
3.499991 24.82659 1.493982
4.499986 28.109907 1.490973
5.499982 31.379902 1.4879639
6.499977 34.636578 1.484955
7.499973 37.879936 1.4819459
8.499969 41.109974 1.4789369
9.499964 44.32669 1.475928
10.499959 47.530087 1.4729189
11.499954 50.720165 1.4699099
12.49995 53.896923 1.4669008
13.499946 57.060364 1.4638919
14.499941 60.21048 1.4608828
15.499936 63.347282 1.4578738
16.499931 66.47076 1.4548647
17.499928 69.58092 1.4518558
18.499924 72.67776 1.4488468
19.499918 75.761284 1.4458377
20.499914 78.83148 1.4428288
21.499908 81.88837 1.4398197
22.499905 84.93192 1.4368107
23.999899 89.47229 1.4322972
24.999893 92.48255 1.4292881
25.99989 95.4795 1.4262792
26.999884 98.46312 1.4232701
27.99988 101.433426 1.4202611
28.999876 104.3904 1.4172522
29.99987 107.33407 1.4142431
30.999866 110.26441 1.4112341
31.999863 113.18144 1.408225
32.99986 116.085144 1.4052161
33.99985 118.97553 1.402207
34.999847 121.85259 1.399198
35.999844 124.71634 1.3961891
36.99984 127.566765 1.39318
37.999836 130.40387 1.390171
38.99983 133.22766 1.387162
39.999825 136.03813 1.384153
40.99982 138.83528 1.3811439
41.999817 141.61911 1.378135
43.49981 145.76987 1.3736215
44.499805 148.5204 1.3706124
45.4998 151.25761 1.3676034
46.499798 153.98149 1.3645943
47.49979 156.69206 1.3615854
48.499786 159.38931 1.3585764
49.499783 162.07324 1.3555673
50.49978 164.74385 1.3525584
51.499775 167.40115 1.3495493
52.499767 170.04512 1.3465403
53.499763 172.67577 1.3435313
54.49976 175.2931 1.3405223
55.499756 177.89711 1.3375133
56.499752 180.48781 1.3345042
57.499744 183.06519 1.3314953
58.99974 186.90627 1.3269818
59.999737 189.45033 1.3239727
60.99973 191.9811 1.3209637
61.999725 194.49852 1.3179547
62.99972 197.00264 1.3149457
63.999718 199.49344 1.3119366
64.99971 201.97092 1.3089277
65.99971 204.43507 1.3059186
66.9997 206.88591 1.3029096
67.9997 209.32343 1.2999007
68.999695 211.74762 1.2968916
69.99969 214.1585 1.2938826
70.99969 216.55605 1.2908735
71.99968 218.94029 1.2878646
72.99968 221.3112 1.2848555
73.99967 223.66881 1.2818465
74.999664 226.01308 1.2788376
75.999664 228.34404 1.2758285
76.99966 230.66168 1.2728195
77.99966 232.966 1.2698104
78.99965 235.257 1.2668015
79.99964 237.53468 1.2637924
80.99964 239.79904 1.2607834
81.99963 242.05008 1.2577745
82.99963 244.2878 1.2547654
83.999626 246.5122 1.2517564
84.99962 248.72328 1.2487473
85.99962 250.92105 1.2457384
86.99961 253.10548 1.2427293
87.99961 255.27661 1.2397203
88.9996 257.43442 1.2367113
90.499596 260.64615 1.2321978
91.99959 263.8279 1.2276843
92.99959 265.93243 1.2246753
93.99958 268.02362 1.2216662
94.99957 270.1015 1.2186573
95.99957 272.16608 1.2156482
96.999565 274.21732 1.2126392
97.999565 276.25525 1.2096303
98.99956 278.27985 1.2066212
99.99956 280.29114 1.2036122
100.99955 282.28912 1.2006031
101.99954 284.27377 1.1975942
102.99954 286.2451 1.1945851
103.999535 288.2031 1.1915761
104.999535 290.1478 1.1885672
105.99953 292.07916 1.1855581
106.99952 293.9972 1.1825491
107.99952 295.90192 1.17954
108.99951 297.79333 1.1765311
109.99951 299.67142 1.173522
110.999504 301.5362 1.170513
111.9995 303.38763 1.1675041
112.9995 305.22577 1.164495
113.99949 307.0506 1.161486
114.99949 308.8621 1.158477
115.99948 310.66025 1.155468
116.99947 312.4451 1.1524589
117.99947 314.21664 1.14945
118.999466 315.97485 1.1464409
119.999466 317.71973 1.1434319
120.99946 319.45132 1.1404229
121.99945 321.16956 1.1374139
122.99945 322.8745 1.1344049
123.99944 324.56613 1.1313958
124.99944 326.24442 1.1283869
125.999435 327.9094 1.1253778
126.99943 329.56104 1.1223688
127.99943 331.19937 1.1193599
128.99942 332.8244 1.1163508
129.99942 334.4361 1.1133418
130.99942 336.03445 1.1103327
131.9994 337.6195 1.1073238
132.9994 339.19125 1.1043147
133.9994 340.74966 1.1013057
134.99939 342.29477 1.0982968
135.99939 343.82654 1.0952877
136.99939 345.345 1.0922787
137.99937 346.85016 1.0892696
138.99937 348.34198 1.0862607
139.99937 349.82047 1.0832516
140.99937 351.28564 1.0802426
141.99936 352.73752 1.0772336
142.99936 354.17606 1.0742246
143.99936 355.60126 1.0712156
144.99934 357.01315 1.0682065
145.99934 358.41174 1.0651976
146.99934 359.797 1.0621885
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148.99933 362.5276 1.0561705
149.99933 363.87286 1.0531615
150.99933 365.20486 1.0501525
151.99931 366.52353 1.0471435
152.99931 367.82886 1.0441345
153.99931 369.12088 1.0411254
154.9993 370.3996 1.0381165
155.9993 371.66498 1.0351074
156.9993 372.91705 1.0320984
157.9993 374.1558 1.0290895
158.99928 375.38123 1.0260804
159.99928 376.59332 1.0230714
160.99928 377.7921 1.0200623
161.99927 378.97757 1.0170534
162.99927 380.14972 1.0140443
163.99927 381.30853 1.0110353
164.99925 382.45404 1.0080262
165.99925 383.58624 1.0050173
166.99925 384.7051 1.0020083
167.99925 385.81067 0.99899924
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170.49924 388.51627 0.9914767
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175.4992 393.6777 0.97643167
176.4992 394.67004 0.97342265
177.4992 395.64905 0.9704136
178.49919 396.61475 0.9674046
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180.49919 398.50616 0.9613866
181.49919 399.4319 0.9583776
182.49918 400.3443 0.9553686
183.49918 401.2434 0.95235956
184.49918 402.12918 0.94935054
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471.49786 105.87052 0.08576368
472.49786 102.92023 0.082754664
473.49786 99.95661 0.07974565
474.49786 96.979675 0.07673664
475.49786 93.989426 0.07372762
476.49783 90.985855 0.07071861
477.49783 87.96896 0.067709595
478.49783 84.93875 0.06470058
479.49783 81.89522 0.06169157
480.49783 78.83836 0.058682557
481.49783 75.768196 0.055673543
482.49783 72.68471 0.05266453
483.4978 69.5879 0.049655516
484.4978 66.47777 0.046646502
485.4978 63.354317 0.04363749
486.4978 60.217545 0.040628478
487.4978 57.067455 0.037619464
488.4978 53.90405 0.03461045
489.4978 50.727318 0.031601436
490.49777 47.53727 0.028592423
491.49777 44.333904 0.025583409
492.49777 41.117218 0.022574397
493.49777 37.88721 0.019565383
494.49777 34.643883 0.01655637
495.49777 31.387236 0.013547356
496.49777 28.11727 0.010538342
497.49774 24.833984 0.007529329
498.49774 21.537378 0.004520315
499.49774 18.227453 0.001511302
500.49774 14.904208 -0.001497712
as for code commenting sorry I'm used to working on my own and have a near photographic memory here is commented ver.
http://pastebin.com/Wkc9mcJR