Convert RGB as a float into unsigned chars

[Adam Teasdale Hartshorne]

I need to convert a colour defined as floats of R,G and B channels into
the same R,G and B channels but defined by unsigned char's. Any help?

Adam

 

[mlimber]

I need to convert a colour defined as floats of R,G and B channels into
the same R,G and B channels but defined by unsigned char's. Any help?

Adam

Presumably the values are floats because they're in the range [0..1] or
something like that. If so, just scale it up:

#include <limits>

// ...
typedef unsigned char uchar;
const uchar r = uchar( std::numeric_limits<uchar>::max * r_float );
// etc.

Cheers! --M

 

[Greg]

I need to convert a colour defined as floats of R,G and B channels into
the same R,G and B channels but defined by unsigned char's. Any help?

Adam

Presumably the values are floats because they're in the range [0..1] or
something like that. If so, just scale it up:

#include <limits>

// ...
typedef unsigned char uchar;
const uchar r = uchar( std::numeric_limits<uchar>::max * r_float );
// etc.

Cheers! --M

Lastly, I would just verify that the maximum and minimum values (white
and black) in the floating point representation scale to to
{255,255,255} and {0,0,0} exactly.

Greg