global functions

# glm::packDouble2x32(...)

## double glm::packDouble2x32(const glm::uvec2 &v)

*Documentation from code comments*

*Documentation from code comments*

Returns a double-precision value obtained by packing the components of v into a 64-bit value. If an IEEE 754 Inf or NaN is created, it will not signal, and the resulting floating point value is unspecified. Otherwise, the bit- level representation of v is preserved. The first vector component specifies the 32 least significant bits; the second component specifies the 32 most significant bits.

**See also**: GLSL packDouble2x32 man page

**See also**: GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions

# glm::packHalf2x16(...)

## glm::uint glm::packHalf2x16(const glm::vec2 &v)

*Documentation from code comments*

*Documentation from code comments*

Returns an unsigned integer obtained by converting the components of a two-component floating-point vector to the 16-bit floating-point representation found in the OpenGL Specification, and then packing these two 16- bit integers into a 32-bit unsigned integer. The first vector component specifies the 16 least-significant bits of the result; the second component specifies the 16 most-significant bits.

**See also**: GLSL packHalf2x16 man page

**See also**: GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions

# glm::packSnorm2x16(...)

## glm::uint glm::packSnorm2x16(const glm::vec2 &v)

*Documentation from code comments*

*Documentation from code comments*

First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. Then, the results are packed into the returned 32-bit unsigned integer.

The conversion for component c of v to fixed point is done as follows: packSnorm2x16: round(clamp(v, -1, +1) * 32767.0)

The first component of the vector will be written to the least significant bits of the output; the last component will be written to the most significant bits.

**See also**: GLSL packSnorm2x16 man page

**See also**: GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions

# glm::packSnorm4x8(...)

## glm::uint glm::packSnorm4x8(const glm::vec4 &v)

*Documentation from code comments*

*Documentation from code comments*

First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. Then, the results are packed into the returned 32-bit unsigned integer.

The conversion for component c of v to fixed point is done as follows: packSnorm4x8: round(clamp(c, -1, +1) * 127.0)

The first component of the vector will be written to the least significant bits of the output; the last component will be written to the most significant bits.

**See also**: GLSL packSnorm4x8 man page

**See also**: GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions

# glm::packUnorm2x16(...)

## glm::uint glm::packUnorm2x16(const glm::vec2 &v)

*Documentation from code comments*

*Documentation from code comments*

First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. Then, the results are packed into the returned 32-bit unsigned integer.

The conversion for component c of v to fixed point is done as follows: packUnorm2x16: round(clamp(c, 0, +1) * 65535.0)

The first component of the vector will be written to the least significant bits of the output; the last component will be written to the most significant bits.

**See also**: GLSL packUnorm2x16 man page

**See also**: GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions

# glm::packUnorm4x8(...)

## glm::uint glm::packUnorm4x8(const glm::vec4 &v)

*Documentation from code comments*

*Documentation from code comments*

The conversion for component c of v to fixed point is done as follows: packUnorm4x8: round(clamp(c, 0, +1) * 255.0)

**See also**: GLSL packUnorm4x8 man page

**See also**: GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions

# glm::unpackDouble2x32(...)

## glm::uvec2 glm::unpackDouble2x32(double v)

*Documentation from code comments*

*Documentation from code comments*

Returns a two-component unsigned integer vector representation of v. The bit-level representation of v is preserved. The first component of the vector contains the 32 least significant bits of the double; the second component consists the 32 most significant bits.

**See also**: GLSL unpackDouble2x32 man page

**See also**: GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions

# glm::unpackHalf2x16(...)

## glm::vec2 glm::unpackHalf2x16(glm::uint v)

*Documentation from code comments*

*Documentation from code comments*

Returns a two-component floating-point vector with components obtained by unpacking a 32-bit unsigned integer into a pair of 16-bit values, interpreting those values as 16-bit floating-point numbers according to the OpenGL Specification, and converting them to 32-bit floating-point values. The first component of the vector is obtained from the 16 least-significant bits of v; the second component is obtained from the 16 most-significant bits of v.

**See also**: GLSL unpackHalf2x16 man page

**See also**: GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions

# glm::unpackSnorm2x16(...)

## glm::vec2 glm::unpackSnorm2x16(glm::uint p)

*Documentation from code comments*

*Documentation from code comments*

First, unpacks a single 32-bit unsigned integer p into a pair of 16-bit unsigned integers, four 8-bit unsigned integers, or four 8-bit signed integers. Then, each component is converted to a normalized floating-point value to generate the returned two- or four-component vector.

The conversion for unpacked fixed-point value f to floating point is done as follows: unpackSnorm2x16: clamp(f / 32767.0, -1, +1)

The first component of the returned vector will be extracted from the least significant bits of the input; the last component will be extracted from the most significant bits.

**See also**: GLSL unpackSnorm2x16 man page

**See also**: GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions

# glm::unpackSnorm4x8(...)

## glm::vec4 glm::unpackSnorm4x8(glm::uint p)

*Documentation from code comments*

*Documentation from code comments*

First, unpacks a single 32-bit unsigned integer p into a pair of 16-bit unsigned integers, four 8-bit unsigned integers, or four 8-bit signed integers. Then, each component is converted to a normalized floating-point value to generate the returned two- or four-component vector.

The conversion for unpacked fixed-point value f to floating point is done as follows: unpackSnorm4x8: clamp(f / 127.0, -1, +1)

The first component of the returned vector will be extracted from the least significant bits of the input; the last component will be extracted from the most significant bits.

**See also**: GLSL unpackSnorm4x8 man page

**See also**: GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions

# glm::unpackUnorm2x16(...)

## glm::vec2 glm::unpackUnorm2x16(glm::uint p)

*Documentation from code comments*

*Documentation from code comments*

First, unpacks a single 32-bit unsigned integer p into a pair of 16-bit unsigned integers, four 8-bit unsigned integers, or four 8-bit signed integers. Then, each component is converted to a normalized floating-point value to generate the returned two- or four-component vector.

The conversion for unpacked fixed-point value f to floating point is done as follows: unpackUnorm2x16: f / 65535.0

The first component of the returned vector will be extracted from the least significant bits of the input; the last component will be extracted from the most significant bits.

**See also**: GLSL unpackUnorm2x16 man page

**See also**: GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions

# glm::unpackUnorm4x8(...)

## glm::vec4 glm::unpackUnorm4x8(glm::uint p)

*Documentation from code comments*

*Documentation from code comments*

The conversion for unpacked fixed-point value f to floating point is done as follows: unpackUnorm4x8: f / 255.0

**See also**: GLSL unpackUnorm4x8 man page

**See also**: GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions

Last updated 星期五, 05 一月 2024 04:32:08 UTC - 76da1a94ddd033ed7b011f01e62bc1521791976d

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