hi thanks for your solution can u please tell me what implementation should
be there in cleanvalue(float,float)method
with regards
Nayana
On Sat, May 15, 2010 at 2:39 AM, pkc <poisonkimc...@gmail.com> wrote:
> Just wanted to share my solution. I got this idea from a flash
> script.
>
> I have a slider that adjust the "value", where is ranges from 0 to
> 360.
>
> public void adjustHue(ColorMatrix cm, float value) {
> value = cleanValue(value,180f)/180f*(float)Math.PI;
> if (value == 0 ) { return; }
> float cosVal = (float)Math.cos(value);
> float sinVal = (float)Math.sin(value);
> float lumR = 0.213f;
> float lumG = 0.715f;
> float lumB = 0.072f;
> float[] mat = new float[] {
>
> lumR+cosVal*(1-lumR)+sinVal*(-lumR),lumG+cosVal*(-lumG)+sinVal*(-
> lumG),lumB+cosVal*(-lumB)+sinVal*(1-lumB),0,0,
>
> lumR+cosVal*(-lumR)+sinVal*(0.143f),lumG+cosVal*(1-lumG)
> +sinVal*(0.140f),lumB+cosVal*(-lumB)+sinVal*(-0.283f),0,0,
>
> lumR+cosVal*(-lumR)+sinVal*(-(1-lumR)),lumG+cosVal*(-lumG)
> +sinVal*(lumG),lumB+cosVal*(1-lumB)+sinVal*(lumB),0,0,
> 0f,0f,0f,1f,0f,
> 0f,0f,0f,0f,1f
> };
> cm.postConcat(new ColorMatrix(mat));
> }
>
> On May 10, 1:52 am, rsung <poisonkimc...@gmail.com> wrote:
> > I want to create a slider that changes thehueon an image. I tried
> > using ColorMatrix but it's not working as expected.
> > Any help would much appreciated. Thanks.
> >
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