[Soc-2017-dev] vertex paint project - ply exporter

[Darshan kadu]

Hello, Mr. Howard,

I am still not able to figure out why some faces have different color.
As, you said that it is an only one case, but other cases
like emDM_drawMappedFaces this is used in edit mode and I didn't see
control getting in it while in vertex mode, same goes with
the ccgDM_drawMappedFaces.  So, this two may not be the reason for this
behavior.

I printed out the colors of the vertices, here also all the vertices had
the same color if i assign them the same color along with the alpha.

I tried glEnable to blend for both the conditions i.e. setDrawOptions NULL
and non-NULL . Still no output.

If we look at the Fabio's patch, he added glEnable to
the cdDM_drawFacesTex_common but control don't go in that function if  we
are in solid mode. How Fabio would have handled this problem?
It works properly for alpha 0 and 255 but not for intermediate values.

Can the way in which mesh gets divided be the reason for it?
Thank you ,


On Fri, Jul 14, 2017 at 4:24 PM, Howard Trickey <howard.trickey at gmail.com>
wrote:

> Darshan,
> The changes I suggested were just a start to get it working in the most
> basic case. Good that you got the basic alpha display working!
>
> So far, you changed cdDM_drawMappedFaces, which is used to draw the faces
> for a basic type of derived mesh. But there are other kinds of derived
> meshes too, and you should try to figure out how to change those too, if
> you can.  Search for drawMappedFaces in the blenkernel/intern directory and
> you will see the other versions of the drawing function. When you add a
> Subdivision Surface modifier, the drawing function will
> be ccgDM_drawMappedFaces in subsurf_ccg.c .  See if you can figure out
> yourself how to change the function. See if you can figure out in what
> circumstances other versions of the drawMappedFaces function are called,
> and whether or not you think those are important cases to fix.
>
> Another case where the current code doesn't work for displaying alpha is
> when you have pushed the 'Face selection used for masking' or 'Vertex
> selection used for masking' buttons in vertex paint.  You may want to see
> if you can figure out how to fix those cases too.
>
> I put some hints on how the drawing code works in the basic case in our
> shared notes, doc, https://docs.google.com/document/d/
> 1SX6ASWpYPoJ3EYJri8bX3BfXC5e-mOmraZkKMH8z4_U
>
> You can generally figure out stuff like this yourself by putting
> breakpoints at interesting places in the code and step through from the
> breakpoints, to see what code is called, what direction tests go, etc.
>
>
> On Fri, Jul 14, 2017, 5:00 AM Darshan kadu <darsh7807 at gmail.com> wrote:
>
>> Hello, Mr. Howard,
>>
>> I have pushed the suggested changes. It is working properly for the
>> meshes without subdividing.
>> But after the subdivide it is giving the rectangularly shaped spots. I
>> tried, but I am not getting any hints. What can be happening?
>>
>> Thank you,
>>
>>
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