[vtkusers] interpolate scalars

[Mathieu Malaterre]

mail.ru wrote:
> Hello vtkusers,
> 
> I have such problem -
> There is triangle with some scalar values at vertices.
> This is looks so - (see tri1.jpg in attach)
> Then I split this triangle into 3 triangles by adding new vertex and I
> need to evaluate
> scalar at new vertex thus way that the appearance of triangle not changed.
> i.e. like this - (see tri2.jpg in attach)
> I try to use vtkPropbeFilter passing original triangle as Source and
> new triangles as input, but this doesn't works (see tri3.jpg in
> attach)
> Then I try to applay the same algo as used for Gouraud shading but
> this gives the same result as probe filter.
> 
> Or, maybe, this problem depends on correct building of lookup table?
> I create it such way -
> lut->SetNumberOfColors(4);
> lut->Build();
> lut->SetTableValue(0, colors::red[0], colors::red[1], colors::red[2], 1);
> lut->SetTableValue(3, colors::yellow[0], colors::yellow[1], colors::yellow[2], 1);
> 
> Maybe anyone helps me?


Dmitry,

	Try looking at the code of

vtkQuadraticTriangle::InterpolationFunctions

HTH,
Mathieu