[fpc-pascal] C# translatation

[Ryan Joseph]

I’m going to attempt to translate a perlin noise function (from https://gist.github.com/Flafla2/f0260a861be0ebdeef76) but there are a few things that stopped me from starting.

1) What is & doing in this assignment? I see this many places in assignments.

int h = hash & 15;

2) % is the mod operator in pascal right? So what is the modular assignment %=? num = num mod repeat?

p[x] = permutation[x%256];

if (repeat > 0) num %= repeat;

3) Adding the tertiary operator?

return ((h&1) == 0 ? u : -u)+((h&2) == 0 ? v : -v);

Here’s an easier example. Did I do that correctly?

if h < 8 then
	u := x
else
	u := y;

double u = h < 8 /* 0b1000 */ ? x : y;

Thanks for helping.

Regards,
	Ryan Joseph