Color mixing

advanced
#1

does any body have any idea how to perform the **color mixing operation in open frameworks???
**
1.When two colors are selected and mixed the resultant color should be obtained,
2.I should be able to perform real time painting on a face using this color.

Please help me how to do this or how to start off.
Any help will be appreciable. :frowning:

#2

i’m not an openframeworks guru so mayebe there is some classes or API for that.

but i think that this could be one possible approach could involve color theory:

  • a color is a point in a color space colro-space
  • you could switch between color space with some cool colrospace conversion functions (for example: rgb-to-hsl )
  • you could interpolate your colour-point with some interpolation function like ofLerp

for example from a blue to red you could use http://en.wikipedia.org/wiki/HSL-and-HSV"">HSL
use some Saturation and Light fixed values,
modify Hue starting from 0° (red) to 240° (blue),
interpolate,
came back to rgb to use opengl API.
and this interpolation will pass throug yellow and green.

#3

nkint is right, you probably want to use HSV, there’s some code here for HSV mixing: http://forum.openframeworks.cc/t/hsv-color-setting/770/0