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The computation of texture, when interior texture is used, has a bug for the lower
side of the prism.
Attached the scene to reproduce.
Post a reply to this message
Attachments:
Download 'object.inc.txt' (1 KB)
Download 'rzu.pov.txt' (7 KB)
Download 'rzu.png' (66 KB)
Preview of image 'rzu.png'
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On 06/04/2016 04:47 PM, Le_Forgeron wrote:
> The computation of texture, when interior texture is used, has a bug for the lower
side of the prism.
>
> Attached the scene to reproduce.
>
I think you might be finding too the issue I opened for Christoph at:
https://github.com/POV-Ray/povray/issues/65
but not sure as the your example code is for a clipped lathe?
Bill P.
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Le 05/06/2016 00:48, William F Pokorny a écrit :
> On 06/04/2016 04:47 PM, Le_Forgeron wrote:
>> The computation of texture, when interior texture is used, has a bug for the lower
side of the prism.
>>
>> Attached the scene to reproduce.
>>
>
> I think you might be finding too the issue I opened for Christoph at:
>
> https://github.com/POV-Ray/povray/issues/65
>
> but not sure as the your example code is for a clipped lathe?
Oups, wrong include, still an issue.
Post a reply to this message
Attachments:
Download 'object.inc.txt' (1 KB)
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On 06/05/2016 01:46 AM, Le_Forgeron wrote:
> Le 05/06/2016 00:48, William F Pokorny a écrit :
>> On 06/04/2016 04:47 PM, Le_Forgeron wrote:
>>> The computation of texture, when interior texture is used, has a bug for the lower
side of the prism.
>>>
>>> Attached the scene to reproduce.
>>>
>>
>> I think you might be finding too the issue I opened for Christoph at:
>>
>> https://github.com/POV-Ray/povray/issues/65
>>
>> but not sure as the your example code is for a clipped lathe?
>
> Oups, wrong include, still an issue.
>
Thanks Jérôme. Good catch & what you are seeing is different than issue
65. Issue 65 has to do with the bezier prism sides having normals
flipped relative to all other spline types in prisms and all spline
types in lathes.
It also seems I might have only looked at the prism tops in my test
cases... I'll update those to look at both top and bottoms (both ends).
In any case, I know this bit added to the documentation just added for
the prisms end normals is not right for the current state of the linear
spline version :
"The surface normal determination for prism sides depends upon the order
in which the splines points are specified. Prism ends have normals
which always face outward. The following code, where the linear spline
point order is counter-clockwise in the x-z plane, will render sides
with the color Red on the outside and the color Blue on the inside. The
prism ends will also be Red on the outside and Blue on the inside."
I'll have to update that when I know what the other spline types do on
BOTH ends.
Bill P.
Post a reply to this message
Attachments:
Download 'linearprismtopbotnrmldiff.jpg' (43 KB)
Preview of image 'linearprismtopbotnrmldiff.jpg'
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On 06/05/2016 07:33 AM, William F Pokorny wrote:
> On 06/05/2016 01:46 AM, Le_Forgeron wrote:
>
> I'll have to update that when I know what the other spline types do on
> BOTH ends.
>
> Bill P.
>
>
Turns for all spline types ends are inward on the bottom and outward on
the top...
I'll leave it to others whether to open an independent github issue. I
DID update all my prims test cases and attached v0.1 tarball to bezier,
prism sides issue #65: https://github.com/POV-Ray/povray/issues/65.
I've also taken another pass at lathe and prism reference sections
updates and these can be found at:
http://wiki.povray.org/content/User:Wfpokorny
Jérôme, Do these versions look OK to you for what we see as the current
behavior ?
Bill P.
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Le 05/06/2016 15:11, William F Pokorny a écrit :
> On 06/05/2016 07:33 AM, William F Pokorny wrote:
>> On 06/05/2016 01:46 AM, Le_Forgeron wrote:
>>
>> I'll have to update that when I know what the other spline types do on
>> BOTH ends.
>>
>> Bill P.
>>
>>
> Turns for all spline types ends are inward on the bottom and outward on the top...
>
> I'll leave it to others whether to open an independent github issue. I DID update
all my prims test cases and attached v0.1 tarball to bezier, prism sides issue #65:
https://github.com/POV-Ray/povray/issues/65.
>
> I've also taken another pass at lathe and prism reference sections updates and these
can be found at:
> http://wiki.povray.org/content/User:Wfpokorny
>
> Jérôme, Do these versions look OK to you for what we see as the current behavior ?
>
I like the "removal" of clockwise/counterclockwise.
Hopefully the bezier_prism (and text, and one side of all prism) can be fixed.
Post a reply to this message
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