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Le 15/08/2015 07:33, Mike Horvath a écrit :
> On 8/15/2015 1:17 AM, clipka wrote:
>> Am 15.08.2015 um 06:49 schrieb Mike Horvath:
>>> Let's say that I have a array of points generated from a height
>>> field. But I want areas of low slope to be made completely flat
>>> and rounded to the nearest 24 vertical units.
>>> 
>>> I know that the result will no longer be a classic heightfield
>>> since there will be vertical areas that will need to be joined
>>> by new triangles. But how would I accomplish this?
>> 
>> Sounds like what you want is the equivalent of a 2D array of
>> boxes, with each box's height determined by an input image. Do I
>> understand that correctly?
>> 
>> POV-Ray currently doesn't provide any native support for such an
>> object (except of course an actual array of boxes, a mesh
>> generated by a custom macro, or some such). It shouldn't be too
>> difficult to implement such a primitive though.
>> 
> 
> 
> I only need the special behavior when the slope is already low.
> For areas with a large slope I want to retain the original smooth
> mesh.
> 

Assuming the height-field is created from an image, what you seems to
want is a local filter to detect slope and make them flat... aka
uniform in colour.

With the exception of nearest 24 vertical unit rounding, that looks
like a color/palette reduction in any decent picture manipulation
program. That kind of thing.

> I will have to do the calculations myself because I need to be able
> to import the mesh into LDraw.

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