Uint32 to_pixel(SDL_PixelFormat *fmt, double value) {
double v = (value + (double) 1) / (double) 2;
int a = 255;
double r, g, b;
if(v <= 0.5) { // water
double p = v / 0.5;
r = 0;
g = 0;
b = __i(p, 0.5, 1);
}
else if(v <= 0.53) { // beach
double p = (v - 0.5) / 0.03;
p = sqrt(p);
r = __i(p, 0, 1);
g = __i(p, 0, 1);
b = __i(p, 1, 0.5);
}
else if(v <= 0.56) { // to-grass
double p = (v - 0.53) / 0.03;
p = __c(p);
r = __i(p, 1, 0.5);
g = 1;
b = 0.5;
}
else if(v <= 0.7) { // grass
r = 0.5;
g = 1;
b = 0.5;
}
else if(v <= 0.71) { // to-mountain
double p = (v - 0.7) / 0.01;
r = 0.5;
g = __i(p, 1, 0.5);
b = 0.5;
}
else if(v <= 0.80) { // mountain
double p = (v - 0.71) / 0.09;
r = __i(p, 0.5, 1);
g = __i(p, 0.5, 1);
b = __i(p, 0.5, 1);
}
else { // snow
r = 1;
g = 1;
b = 1;
}
return SDL_MapRGBA(fmt,
(int)(r * (double) 255),
(int)(g * (double) 255),
(int)(b * (double) 255),
a
);
}
inline bool _STLP_CALL
stlp_in_range_aux(const _Iterator1& __it, const _Iterator& __first,
const _Iterator& __last, const bidirectional_iterator_tag &) {
_Iterator1 __i(__first);
for (; __i != __last && __i != __it; ++__i);
return (__i != __last);
}
inline bool _STLP_CALL stlp_in_range_aux(const _Iterator1& __it, const _Iterator& __first,
#endif
const _Iterator& __last, const forward_iterator_tag &) {
_Iterator1 __i(__first);
for (; __i != __last && __i != __it; ++__i);
return (__i != __last);
}
valarray<_Tp> valarray<_Tp>::operator[](const gslice& __slice) const {
valarray<_Tp> __tmp(__slice._M_size(), _NoInit());
if (__tmp.size() != 0) {
_Gslice_Iter __i(__slice);
do __tmp[__i._M_step] = (*this)[__i._M_1d_idx]; while(__i._M_incr());
}
return __tmp;
}
valarray<_Tp>& valarray<_Tp>::operator=(const gslice_array<_Tp>& __x) {
if (this->size() != 0) {
_Gslice_Iter __i(__x._M_gslice);
do
(*this)[__i._M_step] = __x._M_array[__i._M_1d_idx];
while(__i._M_incr());
}
return *this;
}
