Forskelligheder mellem C# og JavaScript i matematiske udregninger

Hvad data type vil JavaScript bruge i beregningen ?

Med værdier tæt på hinanden kunne float godt give lidt andre resultater
end double.

x3 == x1 kan også være tricky. Math.Abs(x3-x1)<0.00000001 måske.

Har du et eksempel på forskel i udregningerne?

c#

interpolate(0*43, 0^23-12/52*34+0, 33*0/33-0*23, 324, 43*0) = 23
interpolate(1*43, 1^23-12/52*34+1, 33*1/33-1*23, 324, 43*1) = 218,2
interpolate(2*43, 2^23-12/52*34+2, 33*2/33-2*23, 324, 43*2) = 218,907692307692
interpolate(3*43, 3^23-12/52*34+3, 33*3/33-3*23, 324, 43*3) = 218,2
interpolate(4*43, 4^23-12/52*34+4, 33*4/33-4*23, 324, 43*4) = 220,323076923077
interpolate(5*43, 5^23-12/52*34+5, 33*5/33-5*23, 324, 43*5) = 218,2
interpolate(6*43, 6^23-12/52*34+6, 33*6/33-6*23, 324, 43*6) = 218,907692307692
interpolate(7*43, 7^23-12/52*34+7, 33*7/33-7*23, 324, 43*7) = 218,2
interpolate(8*43, 8^23-12/52*34+8, 33*8/33-8*23, 324, 43*8) = 217,492307692308
interpolate(9*43, 9^23-12/52*34+9, 33*9/33-9*23, 324, 43*9) = 223,861538461538
interpolate(10*43, 10^23-12/52*34+10, 33*10/33-10*23, 324, 43*10) = 224,569230769231
interpolate(11*43, 11^23-12/52*34+11, 33*11/33-11*23, 324, 43*11) = 223,861538461538
interpolate(12*43, 12^23-12/52*34+12, 33*12/33-12*23, 324, 43*12) = 225,984615384615
interpolate(13*43, 13^23-12/52*34+13, 33*13/33-13*23, 324, 43*13) = 223,861538461538
interpolate(14*43, 14^23-12/52*34+14, 33*14/33-14*23, 324, 43*14) = 224,569230769231
interpolate(15*43, 15^23-12/52*34+15, 33*15/33-15*23, 324, 43*15) = 223,861538461538
interpolate(16*43, 16^23-12/52*34+16, 33*16/33-16*23, 324, 43*16) = 228,815384615385
interpolate(17*43, 17^23-12/52*34+17, 33*17/33-17*23, 324, 43*17) = 229,523076923077
interpolate(18*43, 18^23-12/52*34+18, 33*18/33-18*23, 324, 43*18) = 230,230769230769
interpolate(19*43, 19^23-12/52*34+19, 33*19/33-19*23, 324, 43*19) = 229,523076923077

java script:

interpolate(0*43, 0^23-12/52*34+0, 33*0/33-0*23, 324, 43*0) = 15
interpolate(1*43, 1^23-12/52*34+1, 33*1/33-1*23, 324, 43*1) = 215.36923076923077
interpolate(2*43, 2^23-12/52*34+2, 33*2/33-2*23, 324, 43*2) = 216.07692307692307
interpolate(3*43, 3^23-12/52*34+3, 33*3/33-3*23, 324, 43*3) = 215.36923076923077
interpolate(4*43, 4^23-12/52*34+4, 33*4/33-4*23, 324, 43*4) = 217.4923076923077
interpolate(5*43, 5^23-12/52*34+5, 33*5/33-5*23, 324, 43*5) = 215.36923076923077
interpolate(6*43, 6^23-12/52*34+6, 33*6/33-6*23, 324, 43*6) = 216.07692307692307
interpolate(7*43, 7^23-12/52*34+7, 33*7/33-7*23, 324, 43*7) = 215.36923076923077
interpolate(8*43, 8^23-12/52*34+8, 33*8/33-8*23, 324, 43*8) = 220.3230769230769
interpolate(9*43, 9^23-12/52*34+9, 33*9/33-9*23, 324, 43*9) = 215.36923076923077
interpolate(10*43, 10^23-12/52*34+10, 33*10/33-10*23, 324, 43*10) = 216.07692307692307
interpolate(11*43, 11^23-12/52*34+11, 33*11/33-11*23, 324, 43*11) = 215.36923076923077
interpolate(12*43, 12^23-12/52*34+12, 33*12/33-12*23, 324, 43*12) = 217.4923076923077
interpolate(13*43, 13^23-12/52*34+13, 33*13/33-13*23, 324, 43*13) = 215.36923076923077
interpolate(14*43, 14^23-12/52*34+14, 33*14/33-14*23, 324, 43*14) = 216.07692307692307
interpolate(15*43, 15^23-12/52*34+15, 33*15/33-15*23, 324, 43*15) = 215.36923076923077
interpolate(16*43, 16^23-12/52*34+16, 33*16/33-16*23, 324, 43*16) = 214.66153846153847
interpolate(17*43, 17^23-12/52*34+17, 33*17/33-17*23, 324, 43*17) = 226.69230769230768
interpolate(18*43, 18^23-12/52*34+18, 33*18/33-18*23, 324, 43*18) = 227.4
interpolate(19*43, 19^23-12/52*34+19, 33*19/33-19*23, 324, 43*19) = 226.69230769230768

Prøv lige og sæt nogle .0 på i C# koden !

ja... javascript er vist ikke så typesafe så jeg ved virkelig ikke hvilke typer der er

Hov !!!!!!!!!!!!!!!!

^ er vel XOR i C# og ikke Math.Pow ????

ja, der der da der også... det var nu din .0-kommentar der ledte mig på rette spor. Ovenstående var bare nogle test-udreginger, de oprindelige har ikke ^ i sig.

Ved at caste ALLE mine tag til double virkede det

rr = (int)Math.Round(interpolate((double)lci/(double)(numColors-1),(double)colorList.Codes[lci].r, (double)hci/(double)(numColors-1), (double)colorList.Codes[hci].r, (double)i/(double)(detail-1)));
                gg = (int)Math.Round(interpolate((double)lci/(double)(numColors-1), (double)colorList.Codes[lci].g, (double)hci/(double)(numColors-1), (double)colorList.Codes[hci].g, (double)i/(double)(detail-1)));
                bb = (int)Math.Round(interpolate((double)lci/(double)(numColors-1), (double)colorList.Codes[lci].b, (double)hci/(double)(numColors-1), (double)colorList.Codes[hci].b, (double)i/(double)(detail-1)));

så.. hvis der er nogen der skal bruge en ColorGradient'er, så er det bare at sige til :)

eksempel: http://mpaconsult.dk/colorGenerator.aspx?colors=FFF4FF,FFFFFF&detail=20

læg lige et svar, arne

her