Difference between revisions of "LlAtan2"
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m (Math error in the example script) |
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llOwnerSay("The arctangent of y divided by x is " + (string)llAtan2(num1, num2)); | llOwnerSay("The arctangent of y divided by x is " + (string)llAtan2(num1, num2)); | ||
} | } | ||
}</lsl><lsl>//Function with input of a vector determining the position of a target and returning | |||
//a string with the literal compass-direction of that target towards your position | |||
//by Ramana Sweetwater 2009/01, any use allowed license :-) | |||
string compass (vector target) | |||
{ | |||
vector me = llGetPos(); | |||
float distance = llVecDist(me, target); | |||
list DIRS =["W","NW","N","NE","E","SE","S","SW","W"]; | |||
return llList2String(DIRS,llCeil(4.5-((4*llAtan2((target.y-me.y)/distance,(target.x-me.x)/distance))/PI))); | |||
}</lsl> | }</lsl> | ||
|helpers | |helpers |
Revision as of 11:05, 8 February 2009
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Summary
Function: float llAtan2( float y, float x );3 | Function ID |
0.0 | Forced Delay |
10.0 | Energy |
Returns a float that is the arctangent2 of y, x.
• float | y | |||
• float | x |
Similar to the arctangent(y/x) except it utilizes the signs of x & y to determine the quadrant. Returns zero if x and y are zero.
Caveats
Examples
<lsl>default {
state_entry() { float num1 = llFrand(100.0); float num2 = llFrand(100.0);
llOwnerSay("y = " + (string)num1); llOwnerSay("x = " + (string)num2);
llOwnerSay("The arctangent of y divided by x is " + (string)llAtan2(num1, num2)); }
}</lsl><lsl>//Function with input of a vector determining the position of a target and returning //a string with the literal compass-direction of that target towards your position //by Ramana Sweetwater 2009/01, any use allowed license :-)
string compass (vector target) {
vector me = llGetPos(); float distance = llVecDist(me, target); list DIRS =["W","NW","N","NE","E","SE","S","SW","W"]; return llList2String(DIRS,llCeil(4.5-((4*llAtan2((target.y-me.y)/distance,(target.x-me.x)/distance))/PI)));}</lsl>