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| | |<syntaxhighlight lang="ROBOTC"> | | |<syntaxhighlight lang="ROBOTC"> |
| − | float result = exp(4); // create floating point variable 'result' and set it equal to e raised to the 4th power (e^4 = 54.598) | + | float result = exp(4); // create floating point variable 'result' and |
| | + | // set it equal to e raised to the 4th power (e^4 = 54.598) |
| | </syntaxhighlight> | | </syntaxhighlight> |
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| | |} | | |} |
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| | | | |
| | == floor == | | == floor == |
Revision as of 10:05, 4 January 2012
ROBOTC has a powerful collection of useful math functions for the NXT, TETRIX, and VEX CORTEX platforms. The RCX and VEX PIC platforms do not have enough memory to store these more advanced math functions.
abs
| float abs(const float input)
|
| Returns the absolute value of a number.
| Parameter
|
Explanation
|
| input
|
The number to take the absolute value of (can be: int, long, short, float).
|
float G = -9.81; // create a variable 'G' and set it equal to -9.81
float downForce = abs(G); // create and set variable 'downForce' to the absolute value of 'G' (9.81) |
|
acos
| float acos(const float Cosine)
|
| Returns the arc-cosine of a number in radians.
| Parameter
|
Explanation
|
| Cosine
|
The number to take the arc-cosine of (in radians).
|
float param = 0.5; // create and set floating point variable 'param' to 0.5
float result = acos(param) * 180.0 / PI; // create floating point variable 'result' and
// set it equal to the arc-cosine of 'param' in degrees (60) |
|
asin
| float asin(const float Sine)
|
| Returns the arc-sine of a number in radians.
| Parameter
|
Explanation
|
| Sine
|
The number to take the arc-sine of (in radians).
|
float param = 0.5; // create and set floating point variable 'param' to 0.5
float result = asin(param) * 180.0 / PI; // create floating point variable 'result' and
// set it equal to the arc-sine of 'param' in degrees (30) |
|
atan
| float atan(const float Tangent)
|
| Returns the arc-tangent of a number in radians.
| Parameter
|
Explanation
|
| Tangent
|
The number to take the arc-tangent of (in radians).
|
float param = 0.5; // create and set floating point variable 'param' to 0.5
float result = asin(param) * 180.0 / PI; // create floating point variable 'result' and
// set it equal to the arc-sine of 'param' in degrees (26.565) |
|
ceil
| float ceil(const float input)
|
| Returns the smallest integer value that is greater than or equal to 'input'.
| Parameter
|
Explanation
|
| input
|
The floating point number to take the ceiling value of.
|
float E = 2.72; // create a variable 'E' and set it equal to 2.72
float ceiling = ceil(E); // create and set variable 'ceiling' to the ceiling value of 'E' (3) |
|
cos
| float cos(const float fRadians)
|
| Returns the cosine of a number of radians.
| Parameter
|
Explanation
|
| fRadians
|
The number to take the cosine of (in radians).
|
float result = cos(PI); // create a floating point variable 'result' and set it equal to the cosine of PI (-1) |
|
cosDegrees
| float cosDegrees(const float fDegrees)
|
| Returns the cosine of a number of degrees.
| Parameter
|
Explanation
|
| fDegrees
|
The number to take the cosine of (in degrees).
|
float result = cosDegrees(180); // create a floating point variable 'result' and set it equal to the cosine of 180 degrees (-1) |
|
degreesToRadians
| float degreesToRadians(const float fDegrees)
|
| Returns the radian equivalent of 'fDegrees'.
| Parameter
|
Explanation
|
| fDegrees
|
The number of degrees to convert into radians.
|
float radiansPerDegree = degreesToRadians(1.0); // create a floating point variable 'radiansPerDegree '
// and set it equal to the amount of radians in 1.0 degrees (0.017) |
|
exp
| float exp(const float input)
|
| Returns the number 'e' rasied to the power of 'input'.
| Parameter
|
Explanation
|
| input
|
The floating point number to raise the constant 'e' to.
|
float result = exp(4); // create floating point variable 'result' and
// set it equal to e raised to the 4th power (e^4 = 54.598) |
|
floor
| float floor(const float input)
|
| Returns the largest integer value that is less than or equal to 'input'.
| Parameter
|
Explanation
|
| input
|
The floating point number to take the floor value of.
|
float E = 2.72; // create a variable 'E' and set it equal to 2.72
float floorValue = ceil(E); // create and set variable 'floorValue' to the ceiling value of 'E' (2) |
|
log
| float log(const float input)
|
| Returns the natural logarithm (ln) of 'input'.
| Parameter
|
Explanation
|
| input
|
The floating point number to take the natural logarithm of.
|
float E = 2.72; // create a variable 'E' and set it equal to 2.72
float ln = log(E); // create and set variable 'ln' to the natural log of 'E' (1.00) |
|
log10
| float log10(const float input)
|
| Returns the base-10 logarithm of 'input'.
| Parameter
|
Explanation
|
| input
|
The floating point number to take the base-10 logarithm of.
|
float E = 2.72; // create a variable 'E' and set it equal to 2.72
float logBTen = log10(E); // create and set variable 'logBTen' to the base-10 log of 'E' (0.43) |
|
pow
| float pow(const float base, const float exponent)
|
| Returns 'base' to the power of 'exponent'.
| Parameter
|
Explanation
|
| base
|
The floating point base to raise to the power of 'power'.
|
| exponent
|
The floating point exponent to raise 'base' to.
|
float kilobyte = pow(10, 3); // create floating point variable 'kilobyte' and
// set it equal to 10^3 or 1000 |
|
radiansToDegrees
| short radiansToDegrees(const float fRadians)
|
| Returns the degree equivalent of 'fRadians'.
| Parameter
|
Explanation
|
| fRadians
|
The number of radians to convert into degrees.
|
float degrees = radiansToDegrees(PI); // create a floating point variable 'degrees'
// and set it equal to the amount of degrees in PI (180) |
|
sgn
| short sgn(const float input)
|
| Returns a value less than 0 if 'input' is negative, and a value greater than 0 if 'input is positive.
| Parameter
|
Explanation
|
| input
|
The number to test the sign of
|
int res1 = sgn(-9.81); // returns -1 to 'res1'
int res2 = sgn(3.14); // returns 1 to 'res2'
int res3 = sgn(0); // returns 0 to 'res3' |
|
sin
| float sin(const float fRadians)
|
| Returns the sine of a number of radians.
| Parameter
|
Explanation
|
| fRadians
|
The number to take the sine of (in radians).
|
float result = sin(PI); // create a floating point variable 'result' and set it equal to the cosine of PI (0) |
|
sinDegrees
| float sinDegrees(const float fDegrees)
|
| Returns the sine of a number of degrees.
| Parameter
|
Explanation
|
| fDegrees
|
The number to take the sine of (in degrees).
|
float result = sinDegrees(180); // create a floating point variable 'result' and set it equal to the sine of 180 degrees (0) |
|
sqrt
| float sqrt(const float input)
|
| Returns the square-root of 'input'.
| Parameter
|
Explanation
|
| input
|
The number to take the square-root of.
|
float result = sqrt(1764); // create a floating point variable 'result' and set it equal to the square-root of 1764 (42) |
|
