On 1/22/2016 8:28 PM, Alain wrote:
> Le 16-01-22 19:17, Mike Horvath a écrit :
>> On 1/22/2016 7:05 PM, clipka wrote:
>>> Am 23.01.2016 um 00:53 schrieb Mike Horvath:
>>>> I know there is a macro to convert HLS colors into RGB colors. But can
>>>> this be done in color_maps?
>>>
>>> Sure, why not.
>>>
>>> Note however that this will /not/ give you colour interpolation in HLS
>>> space.
>>>
>>
>> I meant being able to go from hls <0,1/2,1> to hls <1,1/2,1> inside the
>> color_map with smooth gradations.
>>
>> Mike
>
> Copy the macro in your scene.
> Build your colour_map with a loop that goes through the hue values in
> relatively small steps, say 0.01 to 0.03.
> Use the macro to convert each values to the appropriate RGB values.
>
> That way, the disparity between the two colour spaces are kept small
> enough so that they are not perceptible.
>
> The initial copy of the macro is done to speed up the parsing.
> Otherwise, you need to read the whole source file each times the macro
> is used.


I guess that's a workaround until I decide to switch to POV-Ray 3.7.1.


Mike

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