Direction, and color

[Mike Bonner]

Hey!  Simple and easy, Thanks much, will try and get it working tomorrow.

On Fri, Dec 12, 2014 at 11:27 AM, Richmond <richmondmathewson at gmail.com>
wrote:

> On 12/12/14 19:19, Mike Bonner wrote:
>
>> I have a quick question, its one of those that should be obvious, but i'm
>> just not seeing it.
>>
>> What i'm playing with right now, is just a bunch of round grc moving on
>> screen. (an adaption of the "swarm" sample stack created by scott rossi)
>>   What I'd like to do, is modify the colors of of each ball based on
>> direction and speed.  Sort of like a color wheel, zero speed or direction
>> being the center of the wheel.  So, direction would affect color, and
>> speed
>> would affect the end color based on a gradient dark to light.
>>
>> I hope the explanation is clearer than mud.
>>
>> Any suggestions, or reading material that might help get me kickstarted?
>>
>> TIA
>>
>> Mike
>> _______________________________________________
>>
>>
> I don't think that should be unduly difficult . . .
>
> For instance, one could leverage RGB codes so that, let us say, the
> direction in degrees
> could be signalled something like this:
>
> RRR= round (255/(360-DIR)
> set the backgroundColor of grc "myFatBlob" to RRR,GGG,BBB
>
> where DIR is the direction in degrees, GGG is some number 0<GGG<256, and
> so is BBB.
>
> Darkness could be worked out by having one's "Blobs" consist of a pair of
> graphics (one on top of the other)
> where the lower one is black. Speed could then be signalled by setting the
> BLEND level of the top one.
>
> Richmond.
>
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