# plaguebreath

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1. ## Using true values for gravity in a 2D game that must use physics

So now as understand the conversion rate I have another problem, offcurse I was calculating wrong the movement of the box based on the gravity and that resulting on a offscreen in 2 seconds. Now my problem is that I try to get some numbers from my program while debugging but I'm not getting the numbers I was expecting to get.   My actual code look sorta like that in my main loop if frame mod 60 == 0 { show_debug_message("*frame* " + string(frame) +" y " + string_format(y,6,4) +" dist m " + string_format((y - starty) / 32,6,2) + " v m/s " + string_format(vely * 60 /32,6,4) + " v p/f " + string_format(vely,6,4)); }else{ show_debug_message(" frame " + string(frame) +" y " + string_format(y,6,4) +" dist m " + string_format((y - starty) / 32,6,2) + " v m/s " + string_format(vely * 60 /32,6,4) + " v p/f " + string_format(vely,6,4)); } spd = sqrt(power(velx ,2)+power(vely ,2)); vely += g; // pixel per frames y -= vely; frame += 1; where the variable values at the creation looks like starty = 160; g = -(9.8067 * 32) / 60 / 60; frame = 0; spd = 0; vely = 0;   32 it's the pixel per meter ratio and 60 frames per seconds on the execution of the code I got this results, as you see on the key frames ** I expect to get after 60 frames 4.90m as distance but instead I got 4.99m and same for the other frames, the velocity seems correct so not really know what's could be wrong, probably pixel convert not really good :/   *frame*  0 y   160.0000 dist m     0.00 v m/s     0.0000 v p/f     0.0000  frame  1 y   160.0872 dist m     0.00 v m/s    -0.1634 v p/f    -0.0872  frame  2 y   160.2615 dist m     0.01 v m/s    -0.3269 v p/f    -0.1743  frame  3 y   160.5230 dist m     0.02 v m/s    -0.4903 v p/f    -0.2615  frame  4 y   160.8717 dist m     0.03 v m/s    -0.6538 v p/f    -0.3487  frame  5 y   161.3076 dist m     0.04 v m/s    -0.8172 v p/f    -0.4359  frame  6 y   161.8306 dist m     0.06 v m/s    -0.9807 v p/f    -0.5230  frame  7 y   162.4408 dist m     0.08 v m/s    -1.1441 v p/f    -0.6102  frame  8 y   163.1382 dist m     0.10 v m/s    -1.3076 v p/f    -0.6974  frame  9 y   163.9227 dist m     0.12 v m/s    -1.4710 v p/f    -0.7845  frame  10 y   164.7944 dist m     0.15 v m/s    -1.6344 v p/f    -0.8717  frame  11 y   165.7533 dist m     0.18 v m/s    -1.7979 v p/f    -0.9589  frame  12 y   166.7993 dist m     0.21 v m/s    -1.9613 v p/f    -1.0460  frame  13 y   167.9325 dist m     0.25 v m/s    -2.1248 v p/f    -1.1332  frame  14 y   169.1529 dist m     0.29 v m/s    -2.2882 v p/f    -1.2204  frame  15 y   170.4605 dist m     0.33 v m/s    -2.4517 v p/f    -1.3076  frame  16 y   171.8552 dist m     0.37 v m/s    -2.6151 v p/f    -1.3947  frame  17 y   173.3371 dist m     0.42 v m/s    -2.7786 v p/f    -1.4819  frame  18 y   174.9062 dist m     0.47 v m/s    -2.9420 v p/f    -1.5691  frame  19 y   176.5624 dist m     0.52 v m/s    -3.1055 v p/f    -1.6562  frame  20 y   178.3058 dist m     0.57 v m/s    -3.2689 v p/f    -1.7434  frame  21 y   180.1364 dist m     0.63 v m/s    -3.4323 v p/f    -1.8306  frame  22 y   182.0542 dist m     0.69 v m/s    -3.5958 v p/f    -1.9178  frame  23 y   184.0591 dist m     0.75 v m/s    -3.7592 v p/f    -2.0049  frame  24 y   186.1512 dist m     0.82 v m/s    -3.9227 v p/f    -2.0921  frame  25 y   188.3305 dist m     0.89 v m/s    -4.0861 v p/f    -2.1793  frame  26 y   190.5969 dist m     0.96 v m/s    -4.2496 v p/f    -2.2664  frame  27 y   192.9505 dist m     1.03 v m/s    -4.4130 v p/f    -2.3536  frame  28 y   195.3913 dist m     1.11 v m/s    -4.5765 v p/f    -2.4408  frame  29 y   197.9193 dist m     1.18 v m/s    -4.7399 v p/f    -2.5279  frame  30 y   200.5344 dist m     1.27 v m/s    -4.9034 v p/f    -2.6151  frame  31 y   203.2367 dist m     1.35 v m/s    -5.0668 v p/f    -2.7023  frame  32 y   206.0261 dist m     1.44 v m/s    -5.2302 v p/f    -2.7895  frame  33 y   208.9028 dist m     1.53 v m/s    -5.3937 v p/f    -2.8766  frame  34 y   211.8666 dist m     1.62 v m/s    -5.5571 v p/f    -2.9638  frame  35 y   214.9175 dist m     1.72 v m/s    -5.7206 v p/f    -3.0510  frame  36 y   218.0557 dist m     1.81 v m/s    -5.8840 v p/f    -3.1381  frame  37 y   221.2810 dist m     1.92 v m/s    -6.0475 v p/f    -3.2253  frame  38 y   224.5935 dist m     2.02 v m/s    -6.2109 v p/f    -3.3125  frame  39 y   227.9931 dist m     2.12 v m/s    -6.3744 v p/f    -3.3997  frame  40 y   231.4800 dist m     2.23 v m/s    -6.5378 v p/f    -3.4868  frame  41 y   235.0540 dist m     2.35 v m/s    -6.7012 v p/f    -3.5740  frame  42 y   238.7151 dist m     2.46 v m/s    -6.8647 v p/f    -3.6612  frame  43 y   242.4635 dist m     2.58 v m/s    -7.0281 v p/f    -3.7483  frame  44 y   246.2990 dist m     2.70 v m/s    -7.1916 v p/f    -3.8355  frame  45 y   250.2216 dist m     2.82 v m/s    -7.3550 v p/f    -3.9227  frame  46 y   254.2315 dist m     2.94 v m/s    -7.5185 v p/f    -4.0099  frame  47 y   258.3285 dist m     3.07 v m/s    -7.6819 v p/f    -4.0970  frame  48 y   262.5127 dist m     3.20 v m/s    -7.8454 v p/f    -4.1842  frame  49 y   266.7841 dist m     3.34 v m/s    -8.0088 v p/f    -4.2714  frame  50 y   271.1426 dist m     3.47 v m/s    -8.1723 v p/f    -4.3585  frame  51 y   275.5883 dist m     3.61 v m/s    -8.3357 v p/f    -4.4457  frame  52 y   280.1212 dist m     3.75 v m/s    -8.4991 v p/f    -4.5329  frame  53 y   284.7412 dist m     3.90 v m/s    -8.6626 v p/f    -4.6200  frame  54 y   289.4485 dist m     4.05 v m/s    -8.8260 v p/f    -4.7072  frame  55 y   294.2428 dist m     4.20 v m/s    -8.9895 v p/f    -4.7944  frame  56 y   299.1244 dist m     4.35 v m/s    -9.1529 v p/f    -4.8816  frame  57 y   304.0931 dist m     4.50 v m/s    -9.3164 v p/f    -4.9687  frame  58 y   309.1490 dist m     4.66 v m/s    -9.4798 v p/f    -5.0559  frame  59 y   314.2921 dist m     4.82 v m/s    -9.6433 v p/f    -5.1431 *frame*  60 y   319.5223 dist m     4.99 v m/s    -9.8067 v p/f    -5.2302  frame  61 y   324.8398 dist m     5.15 v m/s    -9.9701 v p/f    -5.3174  frame  62 y   330.2443 dist m     5.32 v m/s   -10.1336 v p/f    -5.4046  frame  63 y   335.7361 dist m     5.49 v m/s   -10.2970 v p/f    -5.4918  frame  64 y   341.3150 dist m     5.67 v m/s   -10.4605 v p/f    -5.5789  frame  65 y   346.9811 dist m     5.84 v m/s   -10.6239 v p/f    -5.6661  frame  66 y   352.7344 dist m     6.02 v m/s   -10.7874 v p/f    -5.7533  frame  67 y   358.5748 dist m     6.21 v m/s   -10.9508 v p/f    -5.8404  frame  68 y   364.5024 dist m     6.39 v m/s   -11.1143 v p/f    -5.9276  frame  69 y   370.5172 dist m     6.58 v m/s   -11.2777 v p/f    -6.0148  frame  70 y   376.6191 dist m     6.77 v m/s   -11.4411 v p/f    -6.1019  frame  71 y   382.8083 dist m     6.96 v m/s   -11.6046 v p/f    -6.1891  frame  72 y   389.0845 dist m     7.16 v m/s   -11.7680 v p/f    -6.2763  frame  73 y   395.4480 dist m     7.36 v m/s   -11.9315 v p/f    -6.3635  frame  74 y   401.8986 dist m     7.56 v m/s   -12.0949 v p/f    -6.4506  frame  75 y   408.4364 dist m     7.76 v m/s   -12.2584 v p/f    -6.5378  frame  76 y   415.0614 dist m     7.97 v m/s   -12.4218 v p/f    -6.6250  frame  77 y   421.7735 dist m     8.18 v m/s   -12.5853 v p/f    -6.7121  frame  78 y   428.5728 dist m     8.39 v m/s   -12.7487 v p/f    -6.7993  frame  79 y   435.4593 dist m     8.61 v m/s   -12.9122 v p/f    -6.8865  frame  80 y   442.4330 dist m     8.83 v m/s   -13.0756 v p/f    -6.9737  frame  81 y   449.4938 dist m     9.05 v m/s   -13.2390 v p/f    -7.0608  frame  82 y   456.6418 dist m     9.27 v m/s   -13.4025 v p/f    -7.1480  frame  83 y   463.8770 dist m     9.50 v m/s   -13.5659 v p/f    -7.2352  frame  84 y   471.1993 dist m     9.72 v m/s   -13.7294 v p/f    -7.3223  frame  85 y   478.6088 dist m     9.96 v m/s   -13.8928 v p/f    -7.4095  frame  86 y   486.1055 dist m    10.19 v m/s   -14.0563 v p/f    -7.4967  frame  87 y   493.6893 dist m    10.43 v m/s   -14.2197 v p/f    -7.5838  frame  88 y   501.3604 dist m    10.67 v m/s   -14.3832 v p/f    -7.6710  frame  89 y   509.1185 dist m    10.91 v m/s   -14.5466 v p/f    -7.7582  frame  90 y   516.9639 dist m    11.16 v m/s   -14.7100 v p/f    -7.8454  frame  91 y   524.8964 dist m    11.40 v m/s   -14.8735 v p/f    -7.9325  frame  92 y   532.9161 dist m    11.65 v m/s   -15.0369 v p/f    -8.0197  frame  93 y   541.0230 dist m    11.91 v m/s   -15.2004 v p/f    -8.1069  frame  94 y   549.2170 dist m    12.16 v m/s   -15.3638 v p/f    -8.1940  frame  95 y   557.4982 dist m    12.42 v m/s   -15.5273 v p/f    -8.2812  frame  96 y   565.8666 dist m    12.68 v m/s   -15.6907 v p/f    -8.3684  frame  97 y   574.3222 dist m    12.95 v m/s   -15.8542 v p/f    -8.4556  frame  98 y   582.8649 dist m    13.21 v m/s   -16.0176 v p/f    -8.5427  frame  99 y   591.4948 dist m    13.48 v m/s   -16.1811 v p/f    -8.6299  frame  100 y   600.2119 dist m    13.76 v m/s   -16.3445 v p/f    -8.7171  frame  101 y   609.0161 dist m    14.03 v m/s   -16.5079 v p/f    -8.8042  frame  102 y   617.9075 dist m    14.31 v m/s   -16.6714 v p/f    -8.8914  frame  103 y   626.8861 dist m    14.59 v m/s   -16.8348 v p/f    -8.9786  frame  104 y   635.9518 dist m    14.87 v m/s   -16.9983 v p/f    -9.0657  frame  105 y   645.1047 dist m    15.16 v m/s   -17.1617 v p/f    -9.1529  frame  106 y   654.3448 dist m    15.45 v m/s   -17.3252 v p/f    -9.2401  frame  107 y   663.6721 dist m    15.74 v m/s   -17.4886 v p/f    -9.3273  frame  108 y   673.0865 dist m    16.03 v m/s   -17.6521 v p/f    -9.4144  frame  109 y   682.5881 dist m    16.33 v m/s   -17.8155 v p/f    -9.5016  frame  110 y   692.1769 dist m    16.63 v m/s   -17.9789 v p/f    -9.5888  frame  111 y   701.8528 dist m    16.93 v m/s   -18.1424 v p/f    -9.6759  frame  112 y   711.6160 dist m    17.24 v m/s   -18.3058 v p/f    -9.7631  frame  113 y   721.4662 dist m    17.55 v m/s   -18.4693 v p/f    -9.8503  frame  114 y   731.4037 dist m    17.86 v m/s   -18.6327 v p/f    -9.9375  frame  115 y   741.4283 dist m    18.17 v m/s   -18.7962 v p/f   -10.0246  frame  116 y   751.5401 dist m    18.49 v m/s   -18.9596 v p/f   -10.1118  frame  117 y   761.7391 dist m    18.80 v m/s   -19.1231 v p/f   -10.1990  frame  118 y   772.0252 dist m    19.13 v m/s   -19.2865 v p/f   -10.2861  frame  119 y   782.3985 dist m    19.45 v m/s   -19.4500 v p/f   -10.3733 *frame*  120 y   792.8590 dist m    19.78 v m/s   -19.6134 v p/f   -10.4605  frame  121 y   803.4067 dist m    20.11 v m/s   -19.7768 v p/f   -10.5477  frame  122 y   814.0415 dist m    20.44 v m/s   -19.9403 v p/f   -10.6348  frame  123 y   824.7635 dist m    20.77 v m/s   -20.1037 v p/f   -10.7220  frame  124 y   835.5726 dist m    21.11 v m/s   -20.2672 v p/f   -10.8092  frame  125 y   846.4690 dist m    21.45 v m/s   -20.4306 v p/f   -10.8963  frame  126 y   857.4525 dist m    21.80 v m/s   -20.5941 v p/f   -10.9835  frame  127 y   868.5232 dist m    22.14 v m/s   -20.7575 v p/f   -11.0707  frame  128 y   879.6810 dist m    22.49 v m/s   -20.9210 v p/f   -11.1578  frame  129 y   890.9260 dist m    22.84 v m/s   -21.0844 v p/f   -11.2450  frame  130 y   902.2582 dist m    23.20 v m/s   -21.2479 v p/f   -11.3322  frame  131 y   913.6776 dist m    23.55 v m/s   -21.4113 v p/f   -11.4194  frame  132 y   925.1841 dist m    23.91 v m/s   -21.5747 v p/f   -11.5065  frame  133 y   936.7778 dist m    24.27 v m/s   -21.7382 v p/f   -11.5937  frame  134 y   948.4587 dist m    24.64 v m/s   -21.9016 v p/f   -11.6809  frame  135 y   960.2267 dist m    25.01 v m/s   -22.0651 v p/f   -11.7680  frame  136 y   972.0820 dist m    25.38 v m/s   -22.2285 v p/f   -11.8552  frame  137 y   984.0244 dist m    25.75 v m/s   -22.3920 v p/f   -11.9424  frame  138 y   996.0539 dist m    26.13 v m/s   -22.5554 v p/f   -12.0296  frame  139 y  1008.1706 dist m    26.51 v m/s   -22.7189 v p/f   -12.1167  frame  140 y  1020.3745 dist m    26.89 v m/s   -22.8823 v p/f   -12.2039  frame  141 y  1032.6655 dist m    27.27 v m/s   -23.0457 v p/f   -12.2911  frame  142 y  1045.0437 dist m    27.66 v m/s   -23.2092 v p/f   -12.3782  frame  143 y  1057.5092 dist m    28.05 v m/s   -23.3726 v p/f   -12.4654  frame  144 y  1070.0618 dist m    28.44 v m/s   -23.5361 v p/f   -12.5526  frame  145 y  1082.7015 dist m    28.83 v m/s   -23.6995 v p/f   -12.6397  frame  146 y  1095.4285 dist m    29.23 v m/s   -23.8630 v p/f   -12.7269  frame  147 y  1108.2426 dist m    29.63 v m/s   -24.0264 v p/f   -12.8141  frame  148 y  1121.1438 dist m    30.04 v m/s   -24.1899 v p/f   -12.9013  frame  149 y  1134.1322 dist m    30.44 v m/s   -24.3533 v p/f   -12.9884  frame  150 y  1147.2078 dist m    30.85 v m/s   -24.5168 v p/f   -13.0756  frame  151 y  1160.3705 dist m    31.26 v m/s   -24.6802 v p/f   -13.1628  frame  152 y  1173.6205 dist m    31.68 v m/s   -24.8436 v p/f   -13.2499  frame  153 y  1186.9576 dist m    32.09 v m/s   -25.0071 v p/f   -13.3371  frame  154 y  1200.3820 dist m    32.51 v m/s   -25.1705 v p/f   -13.4243  frame  155 y  1213.8934 dist m    32.93 v m/s   -25.3340 v p/f   -13.5115  frame  156 y  1227.4921 dist m    33.36 v m/s   -25.4974 v p/f   -13.5986  frame  157 y  1241.1779 dist m    33.79 v m/s   -25.6609 v p/f   -13.6858  frame  158 y  1254.9508 dist m    34.22 v m/s   -25.8243 v p/f   -13.7730  frame  159 y  1268.8109 dist m    34.65 v m/s   -25.9878 v p/f   -13.8601  frame  160 y  1282.7582 dist m    35.09 v m/s   -26.1512 v p/f   -13.9473  frame  161 y  1296.7926 dist m    35.52 v m/s   -26.3146 v p/f   -14.0345  frame  162 y  1310.9143 dist m    35.97 v m/s   -26.4781 v p/f   -14.1216  frame  163 y  1325.1232 dist m    36.41 v m/s   -26.6415 v p/f   -14.2088  frame  164 y  1339.4192 dist m    36.86 v m/s   -26.8050 v p/f   -14.2960  frame  165 y  1353.8024 dist m    37.31 v m/s   -26.9684 v p/f   -14.3832  frame  166 y  1368.2727 dist m    37.76 v m/s   -27.1319 v p/f   -14.4703  frame  167 y  1382.8302 dist m    38.21 v m/s   -27.2953 v p/f   -14.5575  frame  168 y  1397.4749 dist m    38.67 v m/s   -27.4588 v p/f   -14.6447  frame  169 y  1412.2067 dist m    39.13 v m/s   -27.6222 v p/f   -14.7318  frame  170 y  1427.0256 dist m    39.59 v m/s   -27.7857 v p/f   -14.8190  frame  171 y  1441.9318 dist m    40.06 v m/s   -27.9491 v p/f   -14.9062  frame  172 y  1456.9252 dist m    40.53 v m/s   -28.1125 v p/f   -14.9934  frame  173 y  1472.0057 dist m    41.00 v m/s   -28.2760 v p/f   -15.0805  frame  174 y  1487.1735 dist m    41.47 v m/s   -28.4394 v p/f   -15.1677  frame  175 y  1502.4283 dist m    41.95 v m/s   -28.6029 v p/f   -15.2549  frame  176 y  1517.7704 dist m    42.43 v m/s   -28.7663 v p/f   -15.3420  frame  177 y  1533.1996 dist m    42.91 v m/s   -28.9298 v p/f   -15.4292  frame  178 y  1548.7159 dist m    43.40 v m/s   -29.0932 v p/f   -15.5164  frame  179 y  1564.3195 dist m    43.88 v m/s   -29.2567 v p/f   -15.6035 *frame*  180 y  1580.0101 dist m    44.38 v m/s   -29.4201 v p/f   -15.6907  frame  181 y  1595.7880 dist m    44.87 v m/s   -29.5835 v p/f   -15.7779  frame  182 y  1611.6531 dist m    45.36 v m/s   -29.7470 v p/f   -15.8651  frame  183 y  1627.6053 dist m    45.86 v m/s   -29.9104 v p/f   -15.9522  frame  184 y  1643.6448 dist m    46.36 v m/s   -30.0739 v p/f   -16.0394  frame  185 y  1659.7714 dist m    46.87 v m/s   -30.2373 v p/f   -16.1266  frame  186 y  1675.9851 dist m    47.37 v m/s   -30.4008 v p/f   -16.2137  frame  187 y  1692.2860 dist m    47.88 v m/s   -30.5642 v p/f   -16.3009  frame  188 y  1708.6741 dist m    48.40 v m/s   -30.7277 v p/f   -16.3881  frame  189 y  1725.1493 dist m    48.91 v m/s   -30.8911 v p/f   -16.4753  frame  190 y  1741.7117 dist m    49.43 v m/s   -31.0546 v p/f   -16.5624  frame  191 y  1758.3613 dist m    49.95 v m/s   -31.2180 v p/f   -16.6496  frame  192 y  1775.0981 dist m    50.47 v m/s   -31.3814 v p/f   -16.7368  frame  193 y  1791.9221 dist m    51.00 v m/s   -31.5449 v p/f   -16.8239  frame  194 y  1808.8333 dist m    51.53 v m/s   -31.7083 v p/f   -16.9111  frame  195 y  1825.8315 dist m    52.06 v m/s   -31.8718 v p/f   -16.9983  frame  196 y  1842.9170 dist m    52.59 v m/s   -32.0352 v p/f   -17.0855  frame  197 y  1860.0896 dist m    53.13 v m/s   -32.1987 v p/f   -17.1726  frame  198 y  1877.3494 dist m    53.67 v m/s   -32.3621 v p/f   -17.2598  frame  199 y  1894.6963 dist m    54.21 v m/s   -32.5256 v p/f   -17.3470  frame  200 y  1912.1304 dist m    54.75 v m/s   -32.6890 v p/f   -17.4341  frame  201 y  1929.6517 dist m    55.30 v m/s   -32.8524 v p/f   -17.5213  frame  202 y  1947.2603 dist m    55.85 v m/s   -33.0159 v p/f   -17.6085  frame  203 y  1964.9559 dist m    56.40 v m/s   -33.1793 v p/f   -17.6956  frame  204 y  1982.7388 dist m    56.96 v m/s   -33.3428 v p/f   -17.7828  frame  205 y  2000.6088 dist m    57.52 v m/s   -33.5062 v p/f   -17.8700  frame  206 y  2018.5659 dist m    58.08 v m/s   -33.6697 v p/f   -17.9572  frame  207 y  2036.6102 dist m    58.64 v m/s   -33.8331 v p/f   -18.0443  frame  208 y  2054.7417 dist m    59.21 v m/s   -33.9966 v p/f   -18.1315  frame  209 y  2072.9604 dist m    59.78 v m/s   -34.1600 v p/f   -18.2187  frame  210 y  2091.2664 dist m    60.35 v m/s   -34.3234 v p/f   -18.3058  frame  211 y  2109.6594 dist m    60.93 v m/s   -34.4869 v p/f   -18.3930  frame  212 y  2128.1396 dist m    61.50 v m/s   -34.6503 v p/f   -18.4802  frame  213 y  2146.7070 dist m    62.08 v m/s   -34.8138 v p/f   -18.5674  frame  214 y  2165.3616 dist m    62.67 v m/s   -34.9772 v p/f   -18.6545  frame  215 y  2184.1033 dist m    63.25 v m/s   -35.1407 v p/f   -18.7417  frame  216 y  2202.9321 dist m    63.84 v m/s   -35.3041 v p/f   -18.8289  frame  217 y  2221.8481 dist m    64.43 v m/s   -35.4676 v p/f   -18.9160  frame  218 y  2240.8513 dist m    65.03 v m/s   -35.6310 v p/f   -19.0032  frame  219 y  2259.9417 dist m    65.62 v m/s   -35.7945 v p/f   -19.0904  frame  220 y  2279.1191 dist m    66.22 v m/s   -35.9579 v p/f   -19.1775  frame  221 y  2298.3838 dist m    66.82 v m/s   -36.1213 v p/f   -19.2647  frame  222 y  2317.7356 dist m    67.43 v m/s   -36.2848 v p/f   -19.3519  frame  223 y  2337.1746 dist m    68.04 v m/s   -36.4482 v p/f   -19.4391  frame  224 y  2356.7007 dist m    68.65 v m/s   -36.6117 v p/f   -19.5262  frame  225 y  2376.3140 dist m    69.26 v m/s   -36.7751 v p/f   -19.6134  frame  226 y  2396.0146 dist m    69.88 v m/s   -36.9386 v p/f   -19.7006  frame  227 y  2415.8025 dist m    70.49 v m/s   -37.1020 v p/f   -19.7877  frame  228 y  2435.6775 dist m    71.11 v m/s   -37.2655 v p/f   -19.8749  frame  229 y  2455.6396 dist m    71.74 v m/s   -37.4289 v p/f   -19.9621  frame  230 y  2475.6890 dist m    72.37 v m/s   -37.5923 v p/f   -20.0493  frame  231 y  2495.8254 dist m    72.99 v m/s   -37.7558 v p/f   -20.1364  frame  232 y  2516.0491 dist m    73.63 v m/s   -37.9192 v p/f   -20.2236  frame  233 y  2536.3599 dist m    74.26 v m/s   -38.0827 v p/f   -20.3108  frame  234 y  2556.7578 dist m    74.90 v m/s   -38.2461 v p/f   -20.3979  frame  235 y  2577.2429 dist m    75.54 v m/s   -38.4096 v p/f   -20.4851  frame  236 y  2597.8152 dist m    76.18 v m/s   -38.5730 v p/f   -20.5723  frame  237 y  2618.4746 dist m    76.83 v m/s   -38.7365 v p/f   -20.6594  frame  238 y  2639.2212 dist m    77.48 v m/s   -38.8999 v p/f   -20.7466  frame  239 y  2660.0549 dist m    78.13 v m/s   -39.0634 v p/f   -20.8338 *frame*  240 y  2680.9758 dist m    78.78 v m/s   -39.2268 v p/f   -20.9210
2. ## Using true values for gravity in a 2D game that must use physics

Sorry for the obvious error regarding mt (i mean m offcurse) and thank you Norman for the tips u gave me. I have to admit I get little bit lost on the discussion about acceleration. I understand I make stupid error about conversion so I must convert ((a*32)/fps)/fps to get the correct conversion as said Antony, right ?
3. ## Using true values for gravity in a 2D game that must use physics

I guess the only solution usable could be the adapt gravity value on smaller value. I will try to fix the view on the screen too as suggested Mussi, thank you for the suggestions.
4. ## Using true values for gravity in a 2D game that must use physics

Well fun is not take into account if I have to write some drag and lift formula and expect certain behavior by my body with certain values and in opposite find totally different :) my object it's a 5 mt box and must be this size but not think I can scale down to 32px per 5 ..... Drag and lift based on speed so I would like to get at least some sort of normality on numbers.
5. ## Using true values for gravity in a 2D game that must use physics

Hello everyone, I would like to know your opinion about the problem I'm facing right now. I'm try to using GameMaker for make a simple game that will let user control a box where I will apply a "normal" force of gravity like on earth of 9.81m/s², for convenience I decide to use a scale of 1 mt equal to 32 pixel. 1 second is equivalent to 60 frame execution so based on this I will get a velocity increment of around 5.232 pixel per frame and offcurse that's a lot and result in my object just disappear from screen in 2 seconds. I want to keep correct numbers just because I want then to implement the drag and lift force for this object but I'm already stopped from this simple limit. What's your suggestions ? Thank you for the patience, best regards.