GLSL 3.30 - OpenGL

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8 Built-in Functions Syntax genType sinh (genType x) genType cosh (genType x) genType tanh (genType x) genType asinh (genType x) genType acosh (genType x) genType atanh (genType x) Description Returns the hyperbolic sine function e x −e −x 2 Returns the hyperbolic cosine function e x e −x 2 Returns the hyperbolic tangent function sinh x cosh x Arc hyperbolic sine; returns the inverse of sinh. Arc hyperbolic cosine; returns the non-negative inverse of cosh. Results are undefined if x < 1. Arc hyperbolic tangent; returns the inverse of tanh. Results are undefined if ∣x∣≥1. 8.2 Exponential Functions These all operate component-wise. The description is per component. Syntax Description genType pow (genType x, genType y) Returns x raised to the y power, i.e., x y Results are undefined if x < 0. Results are undefined if x = 0 and y
8 Built-in Functions Syntax Description genType sqrt (genType x) Returns x . Results are undefined if x < 0. genType inversesqrt (genType x) 1 Returns . x Results are undefined if x = 0, otherwise it returns –x. genType sign (genType x) genIType sign (genIType x) Returns 1.0 if x > 0, 0.0 if x = 0, or –1.0 if x < 0. genType floor (genType x) genType trunc (genType x) genType round (genType x) genType roundEven (genType x) genType ceil (genType x) genType fract (genType x) Returns a value equal to the nearest integer that is less than or equal to x. Returns a value equal to the nearest integer to x whose absolute value is not larger than the absolute value of x. Returns a value equal to the nearest integer to x. The fraction 0.5 will round in a direction chosen by the implementation, presumably the direction that is fastest. This includes the possibility that round(x) returns the same value as roundEven(x) for all values of x. Returns a value equal to the nearest integer to x. A fractional part of 0.5 will round toward the nearest even integer. (Both 3.5 and 4.5 for x will return 4.0.) Returns a value equal to the nearest integer that is greater than or equal to x. Returns x – floor (x). 83
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The OpenGL ® Shading Language Lang
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Table of Contents 1 Introduction...
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7.2 Fragment Shader Special Variabl
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1 Introduction ○ Layout qualifier
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2 Overview of OpenGL Shading A frag
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3 Basics 3.3 Preprocessor There is
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3 Basics Preprocessor expressions w
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3 Basics By default, compilers of t
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3 Basics 3.5 Tokens The language is
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3 Basics 3.7 Identifiers Identifier
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4 Variables and Types Type uvec2 uv
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4 Variables and Types 4.1.1 Void Fu
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4 Variables and Types 4.1.4 Floats
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4 Variables and Types 4.1.8 Structu
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4 Variables and Types and as an alt
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4 Variables and Types Within a decl
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4 Variables and Types Initializers
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4 Variables and Types For the inter
Page 38 and 39: 4 Variables and Types 4.3.7 Interfa
Page 40 and 41: 4 Variables and Types If an instanc
Page 42 and 43: 4 Variables and Types If an input v
Page 44 and 45: 4 Variables and Types Redeclaring g
Page 46 and 47: 4 Variables and Types Uniform block
Page 48 and 49: 4 Variables and Types The type and
Page 50 and 51: 4 Variables and Types precision pre
Page 52 and 53: 4 Variables and Types #pragma STDGL
Page 54 and 55: 5 Operators and Expressions 5.2 Arr
Page 56 and 57: 5 Operators and Expressions Some us
Page 58 and 59: 5 Operators and Expressions 5.4.4 A
Page 60 and 61: 5 Operators and Expressions 5.6 Mat
Page 62 and 63: 5 Operators and Expressions where t
Page 64 and 65: 5 Operators and Expressions • The
Page 66 and 67: 5 Operators and Expressions And mat
Page 68 and 69: 6 Statements and Structure iteratio
Page 70 and 71: 6 Statements and Structure • The
Page 72 and 73: 6 Statements and Structure 6.3 Iter
Page 74 and 75: 7 Built-in Variables 7.1 Vertex and
Page 76 and 77: 7 Built-in Variables The output var
Page 78 and 79: 7 Built-in Variables If a shader ex
Page 80 and 81: 7 Built-in Variables 7.4.1 Compatib
Page 82 and 83: 7 Built-in Variables // // compatib
Page 84 and 85: 7 Built-in Variables The following
Page 86 and 87: 8 Built-in Functions The OpenGL Sha
Page 90 and 91: 8 Built-in Functions Syntax genType
Page 92 and 93: 8 Built-in Functions Syntax genType
Page 94 and 95: 8 Built-in Functions 8.5 Matrix Fun
Page 96 and 97: 8 Built-in Functions 8.7 Texture Lo
Page 98 and 99: 8 Built-in Functions Syntax int tex
Page 100 and 101: 8 Built-in Functions Syntax gvec4 t
Page 106 and 107: 8 Built-in Functions Syntax vec4 sh
Page 108 and 109: 8 Built-in Functions 8.9 Noise Func
Page 110 and 111: 9 Shading Language Grammar The gram
Page 112 and 113: 9 Shading Language Grammar function
Page 114 and 115: 9 Shading Language Grammar logical_
Page 116 and 117: 9 Shading Language Grammar init_dec
Page 118 and 119: 9 Shading Language Grammar UINT BOO
Page 120 and 121: 9 Shading Language Grammar struct_d
Page 122 and 123: 9 Shading Language Grammar for_init
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GLSL 3.30 - OpenGL

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