Ah, I missed the vbo bug that needed to fix for j807.
with these 2 fixes, I can see a solid color tetrahedron.
press z and x to rotate to see all faces.
vbo=: >@{:glGenBuffers 2;2#_1
colorData=: 1&fc , 3# 0&". ;._2 [ 0 : 0
1 0 0
0 1 0
0 0 1
1 1 0
)
the color of the 3 vertex of the first triangle are all red.
1 0 0
1 0 0
1 0 0
so that interpolation or not, all pixel are of the same color.
similarly for the other faces.
Sat, 29 Feb 2020, Brian Schott написал(а):
> 2 comments below.
>
> 0) I confirmed that scaling the original vertices DOES rescale the object.
> Before it did not. (Increasing the 10 in the line below reduces the
> tetrahedron's size.)
>
> vertexData=: 1&fc ,1 2 0 0 2 3 3 2 1 1 0 3{4 3$, %&10, 0&". ;._2 [ 0 : 0
>
> 1) A couple of simple changes enabled me to verify that 4 faces are colored
> correctly.
>
> R=: _180 0 0
>
> Changing the 4th face's color helped my color defectiveness see the 4th
> face. Others may not need this change.
>
> colorData=: 1&fc ,_3]\3#"2] 0&". ;._2 [ 0 : 0
> 1 0 0
> 0 1 0
> 1 1 1
> 0 0 1
> )
>
> --
> (B=)
> ----------------------------------------------------------------------
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--
regards,
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