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'atan()' complete reference (Read 1675 times)
Ricard
'atan()' complete reference
Apr 20th, 2005, 11:35pm  
I don't know if I should be reporting bugs about the Complete Reference, anyway, I guess it doesn't hurt.

Three changes to be made in the reference for atan():
- in the Examples remove the angleMode(DEGREES) line
- in the Description remove the sentence about the angleMode
- in the Parameters: -1 and 1 -> -Infinity and Infinity (both excluded)

http://processing.org/reference/atan_.html

Quote:
Examples                

float a = PI/3;
float t = tan(a);
float at = atan(t);
// Prints "1.0471976 : 1.7320509 : 1.0471976"
println(a + " : " + t + " : " +  at);


float a = PI + PI/3.0;
float t = tan(a);
float at = atan(t);
// Prints "4.1887903 : 1.7320513 : 1.0471977"
println(a + " : " + t + " : " +  at);


angleMode(DEGREES);
float a = 30;
float t = tan(a);
float at = atan(t);
// Prints "30.0 : 0.57735026 : 30.0"
println(a + " : " + t + " : " +  at);


Description               The inverse of tan(), returns the arc tangent of a value. This function expects the values in the range of -Infinity to Infinity (exclusive) and values are returned in the range -PI/2 to PI/2 or from -90 to 90 depending on the current angle mode.
             
Syntax              

atan(value)

             
Parameters              
value               float: numbers between -1 and 1
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Re: 'atan()' complete reference
Reply #1 - Apr 21st, 2005, 1:39am  
yes, please let me know about all errors in all references. thank you for the detail.

i found similar bugs in asin(), acos(), cos(), sin() and tan(). all fixed now.
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