Gabriele Cosmo
93 lines
3.5 KiB
C++
93 lines
3.5 KiB
C++
// This code implementation is the intellectual property of
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// the GEANT4 collaboration.
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//
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// By copying, distributing or modifying the Program (or any work
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// based on the Program) you indicate your acceptance of this statement,
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// and all its terms.
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//
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// $Id: G4Colour.hh,v 1.5 1999/12/15 16:46:07 gcosmo Exp $
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// GEANT4 tag $Name: geant4-03-00 $
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//
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//
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// John Allison 20th October 1996
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// Class Description:
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// Class G4Colour has 4 fields, which represent the RGBA (red, green, blue,
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// and alpha) components of colour. Each component takes a value between
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// 0 and 1. If an irrelevant value, i.e., a value less than 0 or greater
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// than 1, is given as an argument of the constructor, such a value is
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// automatically clipped to 0 or 1. Alpha is opacity, which is not used
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// at present. You can use its default value 1, which means "opaque"
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// in instantiation of G4Colour.
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//
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// A G4Colour object is instantiated by giving red, green, and blue
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// components to its constructor, i.e.,
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//
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// G4Colour::G4Colour ( G4double r = 1.0,
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// G4double g = 1.0,
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// G4double b = 1.0,
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// G4double a = 1.0);
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// // 0<=red, green, blue <= 1.0
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//
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// The default value of each component is 1.0. That is to say, the default
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// colour is "white". For example, colours which are often used can be
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// instantiated as follows:
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//
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// G4Colour white () ; // white
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// G4Colour white (1.0, 1.0, 1.0) ; // white
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// G4Colour gray (0.5, 0.5, 0.5) ; // gray
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// G4Colour black (0.0, 0.0, 0.0) ; // black
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// G4Colour red (1.0, 0.0, 0.0) ; // red
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// G4Colour green (0.0, 1.0, 0.0) ; // green
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// G4Colour blue (0.0, 0.0, 1.0) ; // blue
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// G4Colour cyan (0.0, 1.0, 1.0) ; // cyan
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// G4Colour magenta (1.0, 0.0, 1.0) ; // magenta
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// G4Colour yellow (1.0, 1.0, 0.0) ; // yellow
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//
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// After instantiation of a G4Colour object, you can access to its components
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// with the following access functions:
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//
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// G4double G4Colour::GetRed () const ; // Get the red component.
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// G4double G4Colour::GetGreen () const ; // Get the green component.
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// G4double G4Colour::GetBlue () const ; // Get the blue component.
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//
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// Class Description - End:
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#ifndef G4COLOUR_HH
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#define G4COLOUR_HH
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#include "globals.hh"
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#include "g4std/iostream"
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class G4Colour {
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friend G4std::ostream& operator << (G4std::ostream& os, const G4Colour& c);
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public: // With description
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G4Colour (G4double r = 1., G4double g = 1., G4double b = 1.,
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G4double a = 1.);
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G4bool operator != (const G4Colour& c) const;
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G4double GetRed () const;
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G4double GetGreen () const;
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G4double GetBlue () const;
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G4double GetAlpha () const; // alpha = opacity = 1. - transparency.
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private:
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G4double red, green, blue, alpha;
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};
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inline G4Colour::G4Colour (G4double r, G4double g, G4double b, G4double a):
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red (r), green (g), blue (b), alpha (a)
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{
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if( red > 1.0 ){red = 1.0;} if( red < 0.0 ){red = 0.0;}
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if( green > 1.0 ){green = 1.0;} if( green < 0.0 ){green = 0.0;}
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if( blue > 1.0 ){blue = 1.0;} if( blue < 0.0 ){blue = 0.0;}
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if( alpha > 1.0 ){alpha = 1.0;} if( alpha < 0.0 ){alpha = 0.0;}
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}
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inline G4double G4Colour::GetRed () const {return red;}
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inline G4double G4Colour::GetGreen () const {return green;}
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inline G4double G4Colour::GetBlue () const {return blue;}
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inline G4double G4Colour::GetAlpha () const {return alpha;}
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#endif
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