function
Function syntax
float llAcos(float val// A number in the range [-1.0, 1.0].
);- Returns
float- Energy
- 10
The returned value is in the range [0.0, PI], or NaN signifying a complex result when the parameter is out of range.
Returns a float that is the arccosine in radians of val
float result = llAcos(0.0);Caveats
Section titled “Caveats”- Triggers a Math Error for complex results if not compiled in Mono.
Examples
Section titled “Examples”Example 1
// This example exercises the full valid range of argument from -1.0 to +1.0
default{ touch_start(integer num_detected) { float random = llFrand(2.0) - 1.0;
llOwnerSay("The arccosine of " + (string)random + " is " + (string)llAcos(random)); }}Example 2
// An example for the Law of Cosines to calculate any angle of a triangle from 3 known side lengths.default{ touch_start(integer num_detected) { vector t = <llFrand(9.0)+1.0, llFrand(9.0)+1.0, llFrand(9.0)+1.0>; // The 3 values of this vector are used to set the lengths of 3 sides of a triangle.
float anglexy = llAcos((t.x*t.x+t.y*t.y-(t.z*t.z)) / ( 2*t.x*t.y)); // Law Of Cosines
llOwnerSay("Using the Law Of Cosines, the angle of a triangle between side a=" + (string)t.x + "and side b=" + (string)t.y + " is = " + (string)anglexy + " radians=" + (string)(anglexy * RAD_TO_DEG) + "° and that angle is not on side c=" + (string)t.z); }}See also
Section titled “See also”Functions
Section titled “Functions”Articles
Section titled “Articles”Original wiki source
Some wiki templates and tables need their original context. View this article on the Second Life Wiki. Technical wording and examples are retained from the source; historical guidance may differ from current behavior.