WebGL GLSL Reference
Based on OpenGL ES Shading Language 1.0
By Sohail Ajmal
abs
Summary
return the absolute value of the parameter
Syntax
genType abs(genType)Example
float x = abs( 0.5 - 1.0);// x = [ 0.5 - 1.0 ] = 0.5
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acos
Summary
return the arccosine of the parameter
Syntax
genType acos(genType)Example
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all
Summary
check whether all elements of a boolean vector are true
Syntax
bool all(bvec)Example
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any
Summary
check whether any element of a boolean vector is true
Syntax
bool any(bvec)Example
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asin
Summary
return the arcsine of the parameter
Syntax
genType asin(genType)Example
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atan
Summary
return the arc-tangent of the parameters
Syntax
genType atan(genType, genType)genType atan(genType)
Example
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ceil
Summary
find the nearest integer that is greater than or equal to the parameter
Syntax
genType ceil(genType)Example
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clamp
Summary
constrain a value to lie between two further values
Syntax
genType clamp(genType, genType, genType)genType clamp(genType, float, float)
Example
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cos
Summary
return the cosine of the parameter
Syntax
genType cos(genType)Example
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cross
Summary
calculate the cross product of two vectors
Syntax
vec3 cross(vec3, vec3)Example
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degrees
Summary
convert a quantity in radians to degrees
Syntax
genType degrees(genType)Example
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distance
Summary
calculate the distance between two points
Syntax
float distance(genType, genType)Example
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dot
Summary
calculate the dot product of two vectors
Syntax
float dot(genType, genType)Example
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equal
Summary
perform a component-wise equal-to comparison of two vectors
Syntax
bvec equal(vec, vec)Example
See Also
lessThan lessThanEqual greaterThan greaterThanEqual notEqual any all not
Links
exp
Summary
return the natural exponentiation of the parameter
Syntax
genType exp(genType)Example
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exp2
Summary
return 2 raised to the power of the parameter
Syntax
genType exp2(genType)Example
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faceforward
Summary
return a vector pointing in the same direction as another
Syntax
genType faceforward(genType, genType, genType)Example
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floor
Summary
find the nearest integer less than or equal to the parameter
Syntax
genType floor(genType)Example
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fract
Summary
compute the fractional part of the argument
Syntax
genType fract(genType)Example
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greaterThan
Summary
perform a component-wise greater-than comparison of two vectors
Syntax
bvec greaterThan(vec, vec)Example
See Also
lessThan lessThanEqual greaterThanEqual equal notEqual any all not
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greaterThanEqual
Summary
perform a component-wise greater-than-or-equal comparison of two vectors
Syntax
bvec greaterThanEqual(vec, vec)Example
See Also
lessThan lessThanEqual greaterThan equal notEqual any all not
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inversesqrt
Summary
return the inverse of the square root of the parameter
Syntax
genType inversesqrt(genType)Example
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length
Summary
calculate the length of a vector
Syntax
float length(genType)Example
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lessThan
Summary
perform a component-wise less-than comparison of two vectors
Syntax
bvec lessThan(vec, vec)Example
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lessThanEqual greaterThan greaterThanEqual equal notEqual any all not
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lessThanEqual
Summary
perform a component-wise less-than-or-equal comparison of two vectors
Syntax
bvec lessThanEqual(vec, vec)Example
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lessThan greaterThan greaterThanEqual equal notEqual any all not
Links
log
Summary
return the natural logarithm of the parameter
Syntax
genType log(genType)Example
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log2
Summary
return the base 2 logarithm of the parameter
Syntax
genType log2(genType)Example
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matrixCompMult
Summary
perform a component-wise multiplication of two matrices
Syntax
mat matrixCompMult(mat, mat)Example
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max
Summary
return the greater of two values
Syntax
genType max(genType, genType)genType max(genType, float)
Example
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min
Summary
return the lesser of two values
Syntax
genType min(genType, genType)genType min(genType, float)
Example
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mix
Summary
linearly interpolate between two values
Syntax
genType mix(genType, genType, genType)genType mix(genType, genType, float)
Example
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mod
Summary
compute value of one parameter modulo another
Syntax
genType mod(genType, float)genType mod(genType, genType)
Example
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normalize
Summary
calculate the normalize product of two vectors
Syntax
genType normalize(genType)Example
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not
Summary
logically invert a boolean vector
Syntax
bvec not(bvec)Example
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notEqual
Summary
perform a component-wise not-equal-to comparison of two vectors
Syntax
bvec notEqual(vec, vec)Example
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lessThan lessThanEqual greaterThan greaterThanEqual equal any all not
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pow
Summary
return the value of the first parameter raised to the power of the second
Syntax
genType pow(genType, genType)Example
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radians
Summary
convert a quantity in degrees to radians
Syntax
genType radians(genType)Example
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reflect
Summary
calculate the reflection direction for an incident vector
Syntax
genType reflect(genType, genType)Example
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refract
Summary
calculate the refraction direction for an incident vector
Syntax
genType refract(genType, genType, float)Example
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sign
Summary
extract the sign of the parameter
Syntax
genType sign(genType)Example
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sin
Summary
return the sine of the parameter
Syntax
genType sin(genType)Example
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smoothstep
Summary
perform Hermite interpolation between two values
Syntax
genType smoothstep(genType, genType, genType)genType smoothstep(float, float, genType)
Example
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sqrt
Summary
return the square root of the parameter
Syntax
genType sqrt(genType)Example
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step
Summary
generate a step function by comparing two values
Syntax
genType step(genType, genType)genType step(float, genType)
Example
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tan
Summary
return the tangent of the parameter
Syntax
genType tan(genType)Example