nerdcruft/libcruft-util
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colour: use floats for values

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double is way too much precision for almost every application. we can
always add more templates or other insanity later.
This commit is contained in:
Danny Robson 2014-12-16 15:12:44 +11:00
parent 5956d0421e
commit 6f23e39459
2 changed files with 21 additions and 22 deletions
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30
colour.cpp
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@ -28,12 +28,12 @@ using namespace util;
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
const util::colour util::colour::WHITE ({ 1.0, 1.0, 1.0, 1.0 }); const util::colour util::colour::WHITE ({ 1, 1, 1, 1 });
const util::colour util::colour::BLACK ({ 0.0, 0.0, 0.0, 1.0 }); const util::colour util::colour::BLACK ({ 0, 0, 0, 1 });
const util::colour util::colour::RED ({ 1.0, 0.0, 0.0, 1.0 }); const util::colour util::colour::RED ({ 1, 0, 0, 1 });
const util::colour util::colour::GREEN ({ 0.0, 1.0, 0.0, 1.0 }); const util::colour util::colour::GREEN ({ 0, 1, 0, 1 });
const util::colour util::colour::BLUE ({ 0.0, 0.0, 1.0, 1.0 }); const util::colour util::colour::BLUE ({ 0, 0, 1, 1 });
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
@ -43,14 +43,14 @@ const util::colour util::colour::BLUE ({ 0.0, 0.0, 1.0, 1.0 });
//! json::type_error. //! json::type_error.
const json::node& const json::node&
operator>> (const json::node &node, colour &c) { operator>> (const json::node &node, colour &c) {
c.red = node[0].as_number (); c.red = static_cast<float> (node[0].as_number ());
c.green = node[1].as_number (); c.green = static_cast<float> (node[1].as_number ());
c.blue = node[2].as_number (); c.blue = static_cast<float> (node[2].as_number ());
try { try {
c.alpha = node[3].as_number (); c.alpha = static_cast<float> (node[3].as_number ());
} catch (...) { } catch (...) {
c.alpha = 1.0; c.alpha = 1;
} }
return node; return node;
@ -62,10 +62,10 @@ namespace util {
template<> template<>
colour colour
random (void) { random (void) {
return colour ({ range<double>::UNIT.random (), return colour ({ range<float>::UNIT.random (),
range<double>::UNIT.random (), range<float>::UNIT.random (),
range<double>::UNIT.random (), range<float>::UNIT.random (),
range<double>::UNIT.random () }); range<float>::UNIT.random () });
} }
template <> template <>
@ -77,7 +77,7 @@ namespace util {
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
std::ostream& std::ostream&
operator<< (std::ostream &os, const util::colour &c) { util::operator<< (std::ostream &os, const util::colour &c) {
os << "colour(" << c.red << ", " << c.green << ", " << c.blue << ", " << c.alpha << ")"; os << "colour(" << c.red << ", " << c.green << ", " << c.blue << ", " << c.alpha << ")";
return os; return os;
} }

13
colour.hpp
View File

@ -27,10 +27,10 @@
namespace util { namespace util {
/// An RGBA colour POD type. /// An RGBA colour POD type.
struct colour { struct colour {
double red; float red;
double green; float green;
double blue; float blue;
double alpha; float alpha;
static const colour WHITE; static const colour WHITE;
static const colour BLACK; static const colour BLACK;
@ -39,9 +39,8 @@ namespace util {
static const colour GREEN; static const colour GREEN;
}; };
std::ostream& operator<< (std::ostream&, const util::colour&);
const json::node& operator>> (const json::node&, util::colour&);
} }
std::ostream& operator<< (std::ostream&, const util::colour&);
const json::node& operator>> (const json::node&, util::colour&);
#endif #endif