Difference between revisions of "User:Strife Onizuka"
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==Downloads== | ==Downloads== |
Revision as of 20:20, 20 July 2007
Status
Taking a couple days off from typing. RSI acting up. Strife Onizuka 17:20, 13 March 2007 (PDT)
Scite/ESL
My config files:
- lsl.api
- lsl.properties
- stripper.zip - Whitespace stripper
- clipboard - copies text to clipboard
- lslint
- indent - code beautifier (picks up where the whitespace stripper leaves off)
- MSVC Express
About Me
I'm an immigrant from URU. Was in all 3 of it's beta's.
Wiki Gnome (causing drama isn't why I'm here).
I have a webpage but haven't updated it in a few months...
Wiki's are the way of the future when it comes to making documentation Ad-hoc but eventually become static as graffiti grows with popularity as a way of controlling it.
also contribute to some other wiki's History Wiki AviSynth:BlindWanderer
When it comes to writing I tend to go towards concise. A short accurate description is better then a long equally accurate description; less to get confused with, easier to find the important information (because it is all important).
Downloads
Updates: | Preview Download |
---|---|
[DMZ] | [Preview] |
[Agni] | [Preview] |
[Siva] | [Preview] |
[Durga] | [Preview] |
[Aditi] | [Preview] |
[Soma] | [Preview] |
[Ganga] | [Preview] |
[Uma] | [Preview] |
TightList
See TightList
Float <-Union-> Integer
integer fui(float a){//union float to integer if(a){//is it non zero? integer b = (a < 0) << 31;//the sign, but later this variable is reused to store the shift if((a = llFabs(a)) < 2.3509887016445750159374730744445e-38)//Denormalized range check & last stirde of normalized range return b | (integer)(a / 1.4012984643248170709237295832899e-45);//this works because the math overlaps; saves cpu time. integer c = llFloor(llLog(a) / 0.69314718055994530941723212145818);//extremes will error towards extreme. following yuch corrects it. return (0x7FFFFF & (integer)(a * (0x1000000 >> b))) | (((c + 126 + (b = ((integer)a - (3 <= (a /= (float)("0x1p"+(string)(c -= (c == 128)))))))) << 23 ) | b); }//for grins, detect the sign on zero. it's not pretty but it works. the previous requires alot of unwinding to understand it. return ((string)a == (string)(-0.0)) << 31; } float iuf(integer a) {//union integer to float return ((float)("0x1p"+(string)((a | !a) - 150))) * ((!!(a = (0xff & (a >> 23))) << 23) | ((a & 0x7fffff))) * (1 | (a >> 31)); }//will crash if the raw exponent == 0xff; reason for crash deviates from float standard; though a crash is warented.
As a specialized mode of transport, this is faster the Float2Hex and just as lossless.
string fuis(float a){//float union to base64ed integer if(a){//is it non zero? integer b = (a < 0) << 31;//the sign, but later this variable is reused to store the shift if((a = llFabs(a)) < 2.3509887016445750159374730744445e-38)//Denormalized range check & last stirde of normalized range b = b | (integer)(a / 1.4012984643248170709237295832899e-45);//the math overlaps; saves cpu time. else { integer c = llFloor(llLog(a) / 0.69314718055994530941723212145818);//extremes will error towards extremes. following yuch corrects it. b = (0x7FFFFF & (integer)(a * (0x1000000 >> b))) | (((c + 126 + (b = ((integer)a - (3 <= (a /= (float)("0x1p"+(string)(c -= (c == 128)))))))) << 23 ) | b); } return llGetSubString(llIntegerToBase64(b),0,5) }//for grins, detect the sign on zero. it's not pretty but it works. the previous requires alot of unwinding to understand it. if((string)a == (string)(0.0)) return "AAAAAA"; return "gAAAAA"; } float siuf(string b) {//base64ed integer union to float integer a = llBase64ToInteger(b); return ((float)("0x1p"+(string)((a | !a) - 150))) * ((!!(a = (0xff & (a >> 23))) << 23) | ((a & 0x7fffff))) * (1 | (a >> 31)); }//will crash if the raw exponent == 0xff; reason for crash deviates from float standard; though a crash is warented.
Float Compare
integer FloatCompare(float a, float b, integer c) {//compare floats and allow for a margin of error, requires fui(). if(a - b)//(c) Strife Onizuka 2006 {//they are not equal //First we convert the floats to integer form, as they would be in memory; integer a_i = fui(a); integer b_i = fui(b); integer a_e = (a_i >> 23) & 0xff; integer b_e = (b_i >> 23) & 0xff; if(!(a_e || b_e) || //to disable the +/- roll under support put a // just before the ! ((a_i & 0x80000000) == (b_i & 0x80000000)))//sign match check {//start by getting and testing the difference, this is what limits c integer diff = a_e - b_e;//ugly is fast, basicly, it gets the mantissa, sets the sign on the mantisa, if(diff >= -1 || diff <= 1)//shifts it depending on exponent, finaly executes the test. if(llAbs(((((a_i & 0x7FFFFF) | (!!a_e << 23)) * ((a_i >> 31) | 1)) >> !~-diff) - ((((b_i & 0x7FFFFF) | (!!b_e << 23)) * ((b_i >> 31) | 1)) >> !~diff)) <= c) jump out; } return (a > b) - (a < b); } @out; return 0; }
FUI2HexFloat
string FUI2HexFloat(integer b) {//Dump FUI float-integer to a hex-float string string c = ""; integer d = 0; integer e = 0xff & (b >> 23); string f = "0x"+(string)(!!e) + "."; if(b & 0x80000000) f = "-"+ f; if(e ^ 127) c = "p" + (string)((e | !e) - 127); if((e = 0xfffffe & (b << 1))) { while(!((e >> d) & 0xf)) d+=4; while(d < 24) { c = llGetSubString(hexc, b = 0xf & (e >> d), b) + c; d += 4; } } return f + c; } string Float2Hex(float a) {//Another way to do Float2Hex, i wrote this for the heck of it; not because it's a good idea. return FUI2HexFloat(fui(a)); }
BitCount
integer bitcount(integer n) {//MIT Hackmem 169, modified to work in LSL integer tmp = n - ((n >> 1) & 0x5B6DB6DB)//modified mask - ((n >> 2) & 0x49249249); return (((tmp + (tmp >> 3)) & 0xC71C71C7) % 63) + (n < 0); }