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bug with textures combined with project_points_to_plane method #244

Open ido-plat opened 4 years ago

ido-plat commented 4 years ago

Description

Hello, I have been using Pyvista for a few weeks, right now i tried attaching some texture to a mesh i made after projecting it using "project_points_to_plane" method. The texture i received was unstable (picture below where i moved a single point with the camera) and very off. I couldn't find a better way to attach a texture other then the add mesh method (or the plot method which i don't want to use) and using the project points to plane worked without a texture. Below is the code and some pictures.

Also, which UV mapping are you using to dress the img onto the 3d mesh?

Thank you so much, Ido

if texture is not None: //any texture that passed would result in the same bug tex = pv.read_texture(texture) pv_mesh.texture_map_to_plane(inplace=True) og = pv_mesh.center projected = pv_mesh.project_points_to_plane(origin=og, normal=normal) //normal is (1,1,1) but every normal have the same issue projected.texture_map_to_plane() plotter.add_mesh(projected, texture=tex) if show: //passed argument plotter.show()

Example Data

image image the texture I use, every texture would cause the same issue: checkers

banesullivan commented 4 years ago

You may want to read up on texture mapping: https://en.wikipedia.org/wiki/UV_mapping

You'll have to generate those UV coordinates appropriately. The project_points_to_plane is likely messing you up massively.

And for this particular mesh, you probably do not want texture coordinates mapped to a best fitting plane.

Also, which UV mapping are you using to dress the img onto the 3d mesh?

We use the standard convention as outlined in the Wikipedia page

ido-plat commented 4 years ago

Thank you, i have decided not to use that projection in the end but i still have a small question regarding texture. Can I use pyvista/vtk tools to automatically apply the texture on the left plot like on the right? As in inverse the projection matrix only on the texture and not the rest of the mesh? image

Plus, in order of changing the type of texture mapper to use vtk.vtkTextureMapToCylinder() instead of the plane mapping how should i do so? I couldn't find a way to make a SetInputConnection() work with pyvista's polydata.

Thank you so much, I appreciate it a lot.

banesullivan commented 4 years ago

Don't use SetInputConnection, use SetInputDataObject as you are passing a data object not a connection.