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A POD-struct comprising a color with an alpha channel. More...
#include <openvrml/basetypes.h>
Public Member Functions | |
| const float & | operator[] (std::size_t index) const throw () |
| Index-based component access. | |
| float | r () const throw () |
| Get the red component. | |
| float | g () const throw () |
| Get the green component. | |
| float | b () const throw () |
| Get the blue component. | |
| float | a () const throw () |
| Get the alpha component. | |
| void | r (float value) throw () |
| Set the red component. | |
| void | g (float value) throw () |
| Set the green component. | |
| void | b (float value) throw () |
| Set the blue component. | |
| void | a (float value) throw () |
| Set the alpha component. | |
| void | hsv (float(&result)[4]) const throw () |
| Get the color_rgba as hue, saturation, and value. | |
| void | hsv (float h, float s, float v, float a=1.0f) throw () |
| Set the color_rgba from hue, saturation, and value. | |
Public Attributes | |
| float | rgba [4] |
| RGB triplet plus alpha. | |
Related Functions | |
(Note that these are not member functions.) | |
| const openvrml::color_rgba | make_color_rgba () throw() |
Create a zero-initialized color_rgba. | |
| const openvrml::color_rgba | make_color_rgba (const float(&rgba)[4]) throw() |
Create a color_rgba. | |
| const openvrml::color_rgba | make_color_rgba (const float r, const float g, const float b, const float a) throw() |
Create a color_rgba. | |
| bool | operator== (const color_rgba &lhs, const color_rgba &rhs) throw() |
| Compare for equality. | |
| bool | operator!= (const color_rgba &lhs, const color_rgba &rhs) throw() |
| Compare for inequality. | |
| std::istream & | operator>> (std::istream &in, color_rgba &c) |
| Stream input. | |
| std::ostream & | operator<< (std::ostream &out, const color_rgba &c) |
| Stream output. | |
A POD-struct comprising a color with an alpha channel.
VRML color_rgbas are represented as four single-precision floating point components—red, green, blue, and alpha—ranging from 0.0 to 1.0. For the alpha channel, 1.0 is opaque.
| const float & openvrml::color_rgba::operator[] | ( | std::size_t | index | ) | const throw () [inline] |
Index-based component access.
| [in] | index | 0 is the red component, 1 is the green component, 2 is the blue component, and 3 is the alpha component. |
index. | float openvrml::color_rgba::r | ( | ) | const throw () [inline] |
Get the red component.
| float openvrml::color_rgba::g | ( | ) | const throw () [inline] |
Get the green component.
| float openvrml::color_rgba::b | ( | ) | const throw () [inline] |
Get the blue component.
| float openvrml::color_rgba::a | ( | ) | const throw () [inline] |
Get the alpha component.
| void openvrml::color_rgba::r | ( | float | value | ) | throw () [inline] |
Set the red component.
| [in] | value | the new component value. |
| void openvrml::color_rgba::g | ( | float | value | ) | throw () [inline] |
Set the green component.
| [in] | value | the new component value. |
| void openvrml::color_rgba::b | ( | float | value | ) | throw () [inline] |
Set the blue component.
| [in] | value | the new component value. |
| void openvrml::color_rgba::a | ( | float | value | ) | throw () [inline] |
Set the alpha component.
| [in] | value | the new component value. |
| void openvrml::color_rgba::hsv | ( | float(&) | result[4] | ) | const throw () |
Get the color_rgba as hue, saturation, and value.
| [out] | result | the hue, saturation, and value. |
| void openvrml::color_rgba::hsv | ( | float | h, |
| float | s, | ||
| float | v, | ||
| float | a = 1.0f |
||
| ) | throw () |
Set the color_rgba from hue, saturation, and value.
| [in] | h | hue. |
| [in] | s | saturation. |
| [in] | v | value. |
| [in] | a | alpha. |
| const openvrml::color_rgba make_color_rgba | ( | ) | throw() [related] |
Create a zero-initialized color_rgba.
color_rgba. | const openvrml::color_rgba make_color_rgba | ( | const float(&) | rgba[4] | ) | throw() [related] |
Create a color_rgba.
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
| [in] | rgba | an array comprising red, green, blue, and alpha components. |
color_rgba. | const openvrml::color_rgba make_color_rgba | ( | const float | r, |
| const float | g, | ||
| const float | b, | ||
| const float | a | ||
| ) | throw() [related] |
Create a color_rgba.
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
| [in] | r | red component. |
| [in] | g | green component. |
| [in] | b | blue component. |
| [in] | a | alpha component. |
color_rgba. | bool operator== | ( | const color_rgba & | lhs, |
| const color_rgba & | rhs | ||
| ) | throw() [related] |
Compare for equality.
| [in] | lhs | left-hand operand. |
| [in] | rhs | right-hand operand. |
true if lhs and rhs have the same value; false otherwise. | bool operator!= | ( | const color_rgba & | lhs, |
| const color_rgba & | rhs | ||
| ) | throw() [related] |
Compare for inequality.
| [in] | lhs | left-hand operand. |
| [in] | rhs | right-hand operand. |
true if lhs and rhs dot not have the same value; false otherwise. | std::istream & operator>> | ( | std::istream & | in, |
| color_rgba & | c | ||
| ) | [related] |
Stream input.
Consistent with the VRML97 convention, commas (“,”) in the input are treated as whitespace.
If any of the color components is outside the the range [0.0, 1.0], the failbit will be set on in and c will be left in an arbitrary state.
| [in,out] | in | input stream. |
| [out] | c | a color_rgba. |
in. | std::ostream & operator<< | ( | std::ostream & | out, |
| const color_rgba & | c | ||
| ) | [related] |
| float openvrml::color_rgba::rgba[4] |
RGB triplet plus alpha.