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Radar/Scanner

Sable Till
Registered User
Join date: 1 May 2006
Posts: 9
08-17-2006 14:11
Hi, I wrote this little scanner and thought it might be useful. You can stick it in a prim and it llSetTexts the names of everyone nearby and their distance and direction and how long they've been around. I put quite a lot of effort into making it as lag free as possible by having it back off when the sim is overloaded and only scan out as far as necessary.

Anyway, let me know if you have any suggestions or questions or comments.

CODE

//Sable Till - Radar/scannar script.
//You can get a copy of the license this script is under at http://www.gnu.org/copyleft/gpl.html
//Copyright (C) 2006 Sable Till

//This program is free software; you can redistribute it and/or
//modify it under the terms of the GNU General Public License
//as published by the Free Software Foundation; either version 2
//of the License, or (at your option) any later version.

//This program is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//GNU General Public License for more details.

//You should have received a copy of the GNU General Public License
//along with this program; if not, write to the Free Software
//Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

string status="none";
list people;
integer maxScanDistance;
vector color = <0,1,1>;
integer maxPeople = 8;
integer scanType = AGENT;
integer scanFreq=1;

integer count(string name) {
integer i = llListFindList(people, [name]);
if(i ==-1){
people+=[name, 0];
return 0;
} else {
integer count = llList2Integer(people, i+1);
people=llListReplaceList(people, [count+scanFreq], i+1, i+1);
return count;
}
}

//calculate time strings with proper units that are sensibly rounded
string time(integer cnt) {
if(cnt>3600) {
return (string)(cnt/3600)+"hr " + (string)((cnt%3600)/60) +"min";
}else {
if(cnt>60) {
return (string)(cnt/60)+"min";
} else {
return (string)cnt+"s";
}
}
}

//I'm pretty sure there's a better way to do this but I'm trying to calculate the angle between
//North and the target so I can work out which direction it is in.
float getAngle(vector me, vector target) {
float hyp = llVecDist(me, target);
float yDiff = target.y-me.y;
float xDiff = target.x-me.x;
float angle = llSin(yDiff/hyp);
if(xDiff>0 && yDiff>0) {
return angle*RAD_TO_DEG;
}
if(xDiff>0 && yDiff<0) {
return 90-angle*RAD_TO_DEG;
}
if(xDiff<0 && yDiff>0) {
return angle*RAD_TO_DEG+270;
}
if(xDiff<0 && yDiff<0) {
return angle*RAD_TO_DEG + 270;
}
return angle*RAD_TO_DEG;
}

default
{
state_entry()
{
llSensorRepeat("", "",scanType, 96, PI, scanFreq);
llSetTimerEvent(6);
}

sensor(integer num_detected) {
people=[];
string result;
integer n=-1;
integer distance=0;
integer detDist;
string name;

vector pos = llGetPos();
//get the dist, name and direction of everyone we just scanned.
for(n=0;n<num_detected && n<maxPeople;++n) {
vector detPos = llDetectedPos(n);
detDist = (integer)llVecDist(pos, detPos);
float angle = getAngle(llGetPos(), detPos);
name = llKey2Name(llDetectedKey(n));
if(detDist<96) {
people+=detDist;
people+=name;
people+=angle;
}
}
//sort the strided list
people = llListSort(people, 3, TRUE);
//construct settext
num_detected = llGetListLength(people)/3;
for(n=0;n<num_detected;++n) {
detDist=llList2Integer(people, n*3);
name = llList2String(people, n*3+1);
float dir = llList2Float(people, n*3+2);
if(detDist>20 && distance<=20) {
result+="<- Chat Range Limit ->\n";
}
result+=name;
if(detDist<20) {
integer cnt = count(name);
result+=" ["+time(cnt)+"]";
}
result+=" ["+(string)detDist+"m]";

if(dir < 0 || dir > 360) {
llOwnerSay("Error:"+(string)dir+":"+name);
}
//determine which compass direction they are in.
if(dir <= 22.5) {
result+=" N\n";
} else {
if(dir > 22.5 && dir <= 67.5) {
result+=" NE\n";
} else {
if(dir > 67.5 && dir <= 112.5) {
result+=" E\n";
} else {
if(dir > 112.5 && dir <= 157.5) {
result+=" SE\n";
} else {
if(dir > 157.5 && dir <= 202.5) {
result+=" S\n";
} else {
if(dir > 202.5 && dir <= 247.5) {
result+=" SW\n";
} else {
if(dir > 247.5 && dir <= 292.5) {
result+=" W\n";
} else {
if(dir > 292.5 && dir <= 337.5) {
result+=" NW\n";
} else {
if(dir > 337.5 && dir < 360) {
result+=" N\n";
}
}
}

}}}}}}

distance=detDist;
}


//If we detected more (or the same number of) people as maxPeople then shrink down the scan distance to just
//the distance to the furthest one. Otherwise increment it a bit in case there are people further out.
if(num_detected>=maxPeople) {
maxScanDistance=distance+10;
} else {
maxScanDistance+=10;
}

result+="\nStatus:"+status;
//adjust max people based on the length of result
if(llStringLength(result)>254) {
maxPeople--;
llOwnerSay("Length is "+(string)llStringLength(result) +
" Decrementing maxPeople to "+(string)maxPeople);
} else {
if(llStringLength(result)<200 && num_detected>maxPeople) {
maxPeople++;
llOwnerSay("Length is "+(string)llStringLength(result) +
" Incrementing maxPeople to "+(string)maxPeople);
}
}
llSetText(result, color, 1);
}

no_sensor() {
llSetText("Status:"+status, color, 1);
maxScanDistance+=10;
llSensorRepeat("", "", scanType, maxScanDistance, PI, scanFreq);
}

//all we do here is check the sims fps and dilation and tone down our scanning if necessary.
timer() {
float fps = llGetRegionFPS();
float timeDilation = llGetRegionTimeDilation();

integer scanDistance;
if(fps<35 || timeDilation <0.9) {
if(maxScanDistance>30) {
scanDistance=30;
}
scanFreq=240;
status = "poor";
llSetTimerEvent(240);
color=<1,0,0>;
} else
{
if(fps<40 || timeDilation<0.95) {
if(maxScanDistance>64) {
scanDistance=64;
} else {
scanDistance=maxScanDistance;
}
scanFreq=30;
status = "ok";
llSetTimerEvent(120);
color=<1,1,0>;
} else
{
if(maxScanDistance>96) {
scanDistance=96;
} else {
scanDistance=maxScanDistance;
}
scanFreq=1;
llSetTimerEvent(60);
status = "good";
color=<0,1,1>;
}}
llSensorRepeat("", "", scanType, scanDistance, PI, scanFreq);
}

}
Nada Epoch
The Librarian
Join date: 4 Nov 2002
Posts: 1,423
Discussion Thread
08-17-2006 18:04
/54/5b/130813/1.html
_____________________
i've got nothing. ;)