red(), green() & blue() while in a custom HSB colorMode

Programming Questions

rapatski

red(), green() & blue() while in a custom HSB colorMode

in Programming Questions • 2 years ago

Using a custom colormode set as colorMode(HSB, 360, 100, 255) (which I happen to find intuitive..) it seems that values returned by these functions are set 'according to the current colorMode' which ends up with bizarrely mapped values: red(0-360), green(0-100) and blue(0-255).

I mean... Really?!!

Replies(3)

PhiLho

Re: red(), green() & blue() while in a custom HSB colorMode

2 years ago

In PGraphics:

/** The current colorMode */
public int colorMode; // = RGB;
/** Max value for red (or hue) set by colorMode */
public float colorModeX; // = 255;
/** Max value for green (or saturation) set by colorMode */
public float colorModeY; // = 255;
/** Max value for blue (or value) set by colorMode */
public float colorModeZ; // = 255;

Apparently, if you set x, y, z ranges, it is for the both modes...
You can switch to another mode (RGB, 255) before using red(), green() and blue().

toxmeister

Re: red(), green() & blue() while in a custom HSB colorMode

2 years ago

May I suggest using the TColor class of toxiclibs instead? It only uses normalized color channels (0.0 .. 1.0) and works in HSV, RGB & CMYK in parallel (although the CMYK in the current release still has some issues, which are fixed now, but not yet released). HSV & RGB handling is absolutely fine though. Also check the examples bundled with the libs...

You can create a color in one space and then straight away work with it in others:

import toxi.geom.*;
import toxi.color.*;
TColor c=TColor.newHSV(0,1,1); // pure red in HSV
println(c.red()); // 1.0
// use for drawing (packed into a 32bit integer)
fill(c.toARGB());

http://postspectacular.com | http://toxiclibs.org

rapatski

Re: red(), green() & blue() while in a custom HSB colorMode

2 years ago

Cheers Toxi, TColor works nice indeed.

Thanks.

Processing's xyz approach is pretty weird though.

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