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#include "Color_ramp.h"
#include <iostream>
// -----------------------------------
// Color_component
// -----------------------------------
Color_component::
Color_component()
{
add(0,0);
add(1,1);
}
Color_component::
Color_component(const double c0, const double c1)
{
add(0,c0);
add(1,c1);
}
double
Color_component::
interpolate(const double v) const
{
Values::const_iterator next = next_it(v);
// next is just after v
Values::const_iterator prev = --next;
++next;
if ( v>=1 && next != values_.end())
std::cerr << ".";
if ( next == values_.end() )
{
return prev->second;
}
const double& a = prev->first;
const double& b = next->first;
return (b-v)/(b-a) * prev->second + (v-a)/(b-a) * next->second;
}
void
Color_component::
add(const double v, double color)
{
if ( color > 1 ) { color = 1; }
if ( color < 0 ) { color = 0; }
Values::iterator next = next_it(v);
values_.insert(next, std::make_pair(v,color));
}
void
Color_component::
rebuild(const double c0, const double c1)
{
values_.clear();
add(1,c1);
add(0,c0);
}
void
Color_component::
print() const
{
for ( Values::const_iterator it = values_.begin(),
end = values_.end() ; it != end ; ++it )
{
std::cout << "<" << it->first << "," << it->second << "> ";
}
std::cout << std::endl;
}
// -----------------------------------
// Color_ramp
// -----------------------------------
Color_ramp::Color_ramp()
: r_()
, g_()
, b_()
{
}
Color_ramp::Color_ramp(const double r0, const double r1,
const double g0, const double g1,
const double b0, const double b1)
{
r_.rebuild(r0,r1);
g_.rebuild(g0,g1);
b_.rebuild(b0,b1);
r_.add(0.5,(std::max)(r0,r1));
g_.add(0.5,(std::max)(g0,g1));
b_.add(0.5,(std::max)(b0,b1));
}
void
Color_ramp::build_red()
{
r_.rebuild(1,0.5);
g_.rebuild(1,0);
b_.rebuild(1,0);
r_.add(0.3,1);
r_.add(0.05,1);
g_.add(0.05,0.95);
g_.add(0.3,0.5);
b_.add(0.05,0);
}
void
Color_ramp::build_blue()
{
r_.rebuild(1,0);
g_.rebuild(1,0);
b_.rebuild(1,0.5);
b_.add(0.1,0.8);
g_.add(0.1,0.4);
r_.add(0.1,0.4);
}
void
Color_ramp::build_thermal()
{
r_.rebuild(1,0.5);
g_.rebuild(1,0);
b_.rebuild(1,0);
r_.add(0.0,0);
r_.add(1,1);
g_.add(0.05,0.8);
g_.add(0.3,0.5);
b_.add(0.0,1.0);
b_.add(1.0,0.0);
}
void
Color_ramp::build_rainbow()
{
r_.rebuild(1,0.5);
g_.rebuild(1,0);
b_.rebuild(1,0);
r_.add(0,0.75);
g_.add(0,0.75);
b_.add(0,1);
r_.add(0.2,0);
g_.add(0.2,0);
b_.add(0.2,1);
r_.add(0.4,0);
g_.add(0.4,1);
b_.add(0.4,0);
r_.add(0.6,1);
g_.add(0.6,1);
b_.add(0.6,0);
r_.add(0.8,1);
g_.add(0.8,0);
b_.add(0.8,0);
}
void
Color_ramp::
print() const
{
std::cout << "r: ";
r_.print();
std::cout << "g: ";
g_.print();
std::cout << "b: ";
b_.print();
}
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