CGTalk - Endian dotnet

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chrrox

12-05-2009, 01:27 PM

Could anyone tell me how to build a function from this dotnet code into max.

namespace EndianReverser {
class Class1 {
static void Main(string[] args) {
Console.WriteLine("0xAABBCCDD = 0x{0}",
EndianReverse(0xAABBCCDD).ToString("X"));
Console.WriteLine("0xFF000000 = 0x{0}",
EndianReverse(0xFF000000).ToString("X"));
Console.WriteLine("0xFF = 0x{0}", EndianReverse(0xFF).ToString("X"))
;
}
static uint EndianReverse(uint x) {
return ((x<<24) | ((x & 0xff00)<<8) | ((x & 0xff0000)> >8) | (x>>24))
;
}
}
}

this is what I want to accomplish using dotnet in max instead of needing a plugin also in max.
the plugin code does this function.

// -- floatSwap ---------------------------------------------------
//

float FloatSwap( float f )
{
union
{
float f;
unsigned char b[4];
} dat1, dat2;

dat1.f = f;
dat2.b[0] = dat1.b[3];
dat2.b[1] = dat1.b[2];
dat2.b[2] = dat1.b[1];
dat2.b[3] = dat1.b[0];

return dat2.f;
}

Value *Ext_FloatSwap_cf(Value **arg_list, int count)
{
// Check the function receives one argument
check_arg_count(Ext_FloatSwap, 1, count);

// Check the function argument is a Float
type_check(arg_list[0], Float, "argument");

float intern = FloatSwap(arg_list[0]->to_float());

return new Float(FloatSwap(arg_list[0]->to_float()));
}

// ----------------------------------------------------------------

so in max I can do floatswap() and it will change the endian order of that variable float

denisT

12-05-2009, 05:46 PM

Could anyone tell me how to build a function from this dotnet code into max.

this is what I want to accomplish using dotnet in max instead of needing a plugin also in max.
the plugin code does this function.

so in max I can do floatswap() and it will change the endian order of that variable float

what is the reason to use dotnet? Speed? Memory saving? you can do it with MXS...

-- i prefer this one
fn floatSwap1 f =
(
d = 2^8
i = bit.floatAsInt f
b1 = i/d
b0 = (mod i d) as integer
b2 = b1/d
b1 = (mod b1 d) as integer
b3 = b2/d
b2 = (mod b2 d) as integer
swap b3 b0
swap b2 b1
i = b0 + b1*d + b2*(2^16) + b3*(2^24)
bit.intAsFloat i
)

fn floatSwap2 f =
(
i = bit.floatAsInt f
h = bit.intashex i
while h.count < 8 do h = "0" + h

s = (substring h 7 2) + (substring h 5 2) + (substring h 3 2) + (substring h 1 2)
bit.intAsFloat (bit.hexasint s)
)

chrrox

12-05-2009, 10:19 PM

Thanks the second one was exactly what I was looking for.

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12-05-2009, 10:19 PM

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