trianglemesh | This is a powerful 3d line drawing extract framework | Machine Learning library
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QUESTION
This is the header file in question:
...ANSWER
Answered 2022-Feb-17 at 00:23loadOBJ()
gives you a pointer to a Model
object.
Model
has a std::vector
(a dynamic array) member named meshes
that holds pointers to TriangleMesh
objects.
TriangleMesh
has a std::vector
member named vertex
holding vec3f
objects.
You can iterate the various vector
s like this:
QUESTION
I want to color some triangles of a TriangleMesh in different colors.
What would be the easiest way to do this, which might even be possible in the fxml file?
The java code:
...ANSWER
Answered 2022-Jan-05 at 23:38I guess this could have been closed as a duplicate (see the resources section for references to potential duplicates).
However, I think it was interesting and pretty unique how the question was framed such that it defined most of the model using FXML, so I thought I'd adapt that to an answer.
High level steps- You need to provide a PhongMaterial with a diffuseMap which is an image that will be the texture for your model.
- You need to define texCoords in your model which map to locations in the diffuseMap image (it is a proportional map in the range 0 to 1).
- When you define the faces, you need to specify the index within the texture map that will be used to color the vertex of the face.
Full explanation is outside of what I am prepared to write up here at this time, but I refer you to other resources where you can find some more information if you need it.
OutputThis is rendered to a gif, so fidelity isn't great, actual output on PC looks better, and the gif output is weirdly massively sped up, but it does give an indication of what the solution does.
texture.png ColoredMesh.javaLoads a textured model and animates it around the X and Y axes.
QUESTION
I've been trying to use the HOnnotate dataset to extract perspective correct hand and object masks as shown in the images of Task-3 of the Hands-2019 challenge.
The data set comes with the following annotations:
...ANSWER
Answered 2021-Dec-16 at 05:51Turns out there is an easy way to do this task using Open3D and the camera intrinsic values. Basically we instruct Open3D to render the image from the POV of the camera.
QUESTION
I am using CMake to define the compilation of a C++ executable. The goal is to use 2 third-party libraries, Open3D and OpenCV. I am able to include one of the two with target_link_libraries
, but including both results in OpenCV functions not being found.
This is my current CMakeLists.txt
ANSWER
Answered 2021-Oct-21 at 18:59The problem was solved by finding this Github issue: https://github.com/isl-org/Open3D/issues/2286
By using specific build flags when building Open3D, the libraries could both be linked correctly and simultaneously with the target_link_libraries(ORB_SLAM ${OpenCV_LIBS} ${Open3D_LIBRARIES})
command.
The build commands were as follows;
QUESTION
I'm working with Open3D library using the following function:
...ANSWER
Answered 2021-Jul-02 at 11:52Turns out you need to use std::placeholders
in your std::bind
function.
The following code works:
QUESTION
I have a set of 3D data points that looks similar to sphere. I need these data points to be connected as a watertight mesh so that it can be used for simulation.
I have worked with Meshlab and obtained a reasonable mesh but not watertight.
After this, I have tried with Open3D python library by using ball pivot algorithm. From this, I am unable to obtain water tight mesh as expected. I tried to work with hole_fixer external library (Hole_fixer), but finding and error in installing using cmake.
I have inserted the code and also "xyz" datapoints used for open3D.
...ANSWER
Answered 2021-Mar-13 at 03:59To achieve a water tight mesh, you can use o3d.geometry.TriangleMesh.create_from_point_cloud_poisson
.
However, Poisson reconstruction requires consistent normal orientation. In your case, you can just orient all normals toward the center of your point cloud. To do that:
QUESTION
I was tinkering around with open3d and I got to the point where I found myself having a vector made from the index of each point I got from a radius search and it looks somewhat like this:
...ANSWER
Answered 2021-Jan-30 at 20:57After banging my head against my monitor I found out that my answer was in front of my eyes but I was so stubborn in solving it a way I wasn't even able to think about I couldn't tell.
The only thing I needed to do is just
QUESTION
I'm a wee bit stuck.
I have a 3D point cloud (an array of (n,3) vertices), in which I am trying to generate a 3D triangular mesh from. So far I have had no luck.
The format my data comes in:
- (x,y) values in regularly spaced (z) intervals. Think of the data as closed loop planar contours stored slice by slice in the z direction.
- The vertices in my data must be absolute positions for the mesh triangles (i.e. I don't want them to be smoothed out such that the volume begins to change shape, but linear interpolation between the layers is fine).
Illustration:
...ANSWER
Answered 2020-Sep-04 at 06:49Actually there are two ways of having meshlab functionality in python:
- The first is MeshLabXML (https://github.com/3DLIRIOUS/MeshLabXML ) a third party, is a Python scripting interface to meshlab scripting interface
- the second is PyMeshLab (https://github.com/cnr-isti-vclab/PyMeshLab ) an ongoing effort done by the MeshLab authors, (currently in alpha stage) to have a direct Python bindings to all the meshlab filters
QUESTION
Newbie here!
I have an STL file which is not watertight and the gap is quite big to repair with the close vertex of the trimesh.
I tried with open3d by following this but I have the following error: "ValueError: vector too long"..
Is there any way to make the mesh watertight? I need to calculate the CoM and Inertia matrix but the values would not be correct if my mesh is not watertight/a closed surface.
For the open3d, firstly I uploaded the stl file, I converted it to numpy and then I used the following code:
...ANSWER
Answered 2020-Nov-16 at 08:21I have managed to make the mesh watertight. I will post here in case anyone is having troubles in the future with it.
My mesh was actually made of 2 smaller meshes, so I had to first merge them together and then use the VTK library to clean the mesh and fill the holes. This made my mesh watertight and I could calculate everything I needed.
This is the code:
QUESTION
I have a class method which returns const std::vector
:
ANSWER
Answered 2020-Oct-23 at 15:38Thanks to @Yksisarvinen this statement works fine:
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