Questions tagged [point-clouds]
questions concerning the use of point clouds / data point sets in blender.
63
questions
0
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14 views
Use point index in geometry node distribution
I'm playing with geometry nodes here and I'm trying to create a way to kinda script the position of each point... for that i'm thinking of creating an attribute that would work as index, something ...
2
votes
1answer
31 views
Get Point Coordinates generated with Geometry Nodes?
Say you generate some random points using Geometry Nodes, how can you get all those point coordinates using the python api?
The only hint I have is that the point coords are located under Point Cloud ...
0
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0answers
23 views
Emit particles from point cloud object for each frame of animation
I'm working on a project that is intended to simulate the motions of stars in a galaxy by importing snapshot txt files with thousands of xyz coordinates each - but for the purposes of this question, I'...
3
votes
1answer
33 views
Numpy / lidar point-cloud to mesh: How to separate polygons?
I have lidar data in numpy structured array with x,y,z and other lidar specifics that I can use to colourize and display.
I have got pretty far on the numpy side for filtering the points down (near, ...
0
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0answers
62 views
Blender Point Cloud access
Is there possibility how to access to the points in Point Cloud object in Python API Bleder > 2.92?
I want to change position of each point, set color and set scale.
I tried the code below. This ...
0
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0answers
336 views
Geometry Nodes - Point Cloud from custom XYZ coordinates?
I'd like to create a point cloud using the Geometry Node Editor based on my own custom data.
The data is stored in a .txt file, plain [x,y,z] coordinates and looks like this:
...
0
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0answers
59 views
Exporting maya animation to blender
I made an animation in MotionBuilder with an actor driving a character's animation and then exported that to Maya. Then I clicked creat->sets (didn't click the box) and then cache->alembic cache-...
9
votes
1answer
2k views
Calculating 3D world co-ordinates using depth map and camera intrinsics
I am looking to annotate points on a rendered 2D image and then use the rendered depth map with the camera intrinsics to find where the point in 3D space is. This process is identical to creating a ...
0
votes
0answers
18 views
vertices extraction
I briefly describe my problem.
I've created a basic 3d model (a surface with some rocks on) and I've also applied textures. Now, I should fix a generic camera position and exctract the information (x, ...
0
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0answers
115 views
.ply rendering in 2.9
I have a .ply file and I simply want to render it in Blender 2.9. I can import it as a .ply and I can see it in the viewport but I have no output in Render. I tried the Point Cloud Visualizer plug-in ...
1
vote
0answers
23 views
How can I disable interface smoothing of point clouds in 2.9?
I am working with point clouds and for a greater precision need to match viewport's point drawing of Blender 2.91 to 2.79.
Here is a comparison between them (Object mode):
As you can see newer ...
0
votes
1answer
330 views
How to load “.npy” file into Blender?
I have a 3-dimensional volume array of size (64, 64, 64) which has an extension of ".npy". I wanted to visualize in Blender so that I can do post-processing work from the software.
I tried ...
0
votes
1answer
33 views
Mesh of vertices shown in viewport but not in render: how to render?
I have a mesh which only consists of vertices. The mesh is essentially a point cloud. I can see the object in the viewport but I can't render it. I want to create a quick animation video where the ...
0
votes
0answers
195 views
Least Squares Fitting of geometry on point-clouds
I use Blender to process meshes built from points clouds. The bigger problem is to make a good reconstruction (retopology) starting from a mesh with millions of points, often not following a regular ...
1
vote
0answers
38 views
Blender custom point density from file
I'm scoping out solutions for rendering custom volumetric data that I'll be parsing from some external source (a simulation being run externally to Blender). I'd like to use Blender's volumetric ...
0
votes
1answer
43 views
How do I set point density node for smoke?
I’m trying to make this animation , I’m using particles from an emitter to create the smoke and force fields to give them the direction I want .
The problem is I’d like to shade the smoke as it was ...
1
vote
0answers
80 views
How to combine multiple .OBJ point cloud files into one point cloud?
I noticed that we can combine multiple OBJ meshes with this answer, but I don't know how to do this with point clouds. I have several point clouds that represent partial scans of an object and I ...
2
votes
1answer
1k views
How to Generate surface from points [duplicate]
Hi Guys,
I have a set of points in 3D. How can I convert this into a surface ?
0
votes
1answer
293 views
Stopping a point cache bake
I have a problem with blender sometimes: when I am running a simulation bake of some kinds, i.e. the point cache bakes, Blender will not allow you to interact with the interface at all. This is not ...
1
vote
0answers
32 views
Weight-paint vertices without mesh in 2.81
Context: I'm trying to annotate point cloud data.
Is there a way to weight paint individual vertices that are not in a mesh?
In the image below, all vertices belong to the vertex group 'Group'. ...
0
votes
1answer
44 views
cannot get wisps on ghost with point cloud node in blender
So I am trying to create a cool ghost pony with a particle system with a wind force and vortex behind it that blows upon the pony. I limited the particles life span to end just past to the pony so ...
0
votes
1answer
48 views
Is it possible to procedurally render a mesh by generating a cloud of 3D RGB points?
I want to render monsters by procedurally generating a cloud of 3D RGB points representing their bodies. In other words, I want to be able to create a function:
...
1
vote
1answer
668 views
Curve from a set of points
I want to make 3D visualisation of a neuron. How can I plot curves from a set of points ? The data is shown in the image.
I found an artist created a mesh with this data. Same posted below.
Data is ...
2
votes
1answer
570 views
Can't export point clouds as a ply file
I want to export vertices (no mesh exists) as ply file. However, after exporting the data by File->Export->.ply, the generated ply file contains no vertices. Can anyone help? I'm using blender 2.8.
...
0
votes
1answer
389 views
Calculate Faces from Point Cloud with Python
I have a bunch of vertices in a point cloud stored in an obj file (i can change the file if need be).
How do I calculate the faces from the point cloud using python? Example:
...
6
votes
2answers
186 views
How to emit particles at intersection of faces (Scan animation)
I want to make an animation that explains laser scanning. It will consist of two videos.
One of the videos is rotating duck with a laser on it.
You can see the animation here. The animation is by me ...
4
votes
0answers
714 views
Point cloud animation
I have around 5500 .ply files, which amount to about 7 GB of point cloud data; each file is one frame of animation.
Is there any feasible way of importing this into blender for processing? I am ...
2
votes
1answer
832 views
Exporting camera tracking markers from Blender
I am trying to use blender to do some matchmoving and then export the camera along with the tracking markers for use in other software. After getting a successfull track, I have created a vertex cloud ...
9
votes
1answer
869 views
Visualizing 3D voxel data in Blender 2.8
right now I'm trying to visualize my scientific 3D data in Blender 2.8. So blenders built in textures or smoke simulations do not lead to the goal.
I've read that older releases of Blender do support ...
2
votes
0answers
100 views
How to removing internal meshes from the stack of cubes?
I have a created a model with a stack of cubes that forms one big single model. There are so many unnecessary faces and cubes present inside the model. I have to remove all the internal faces to ...
19
votes
1answer
871 views
Cycles generates distorted depth
The depth map generated by the Cycles rendering engine seems to have (radial) distortion, while the Blender renderer does not.
However, I could not find anywhere information on the internal camera ...
0
votes
0answers
165 views
Calculate 2.5D point cloud from scene
Ich would like to generate a 2.5D point cloud of a scene from the camera's perspective with python. Let's say the camera has a rosolution of [n,m] pixel and as a result I want to have n*m 3D vectors ...
1
vote
0answers
1k views
How to make a mesh from vertices/points via triangulation?
I have a set of points which each of them can be represented as bezier curve. What I need to do is to make a mesh from them. Probably this meshing algorithm must be based on triangulation. However my ...
1
vote
1answer
335 views
How do I make a luminescent gas cloud?
How can I make a luminescent gas cloud, similar to the one shown in the picture below (labeled "Trapped Atoms")? Thank you.
0
votes
2answers
2k views
Assign colour to vertices given face texture, and enable conversion to a point cloud
I'm a-bit of a Blender newbie here so please forgive me if what I'm about to say sounds stupid, but I've been trying to solve this issue for far too long now and am becoming way too frustrated...so, ...
3
votes
1answer
321 views
Efficient Rendering of Many volumetric particles
I am working on a research project utilizing blender to visualize realistic clouds generated from a Large Eddy Simulation. I've been able to do so in limited respects.
These images, while pretty, ...
2
votes
1answer
1k views
How to recreate a “point cloud sandbox” effect in blender?
I wish to recreate this effect with particles.
Having the point cloud reforming the object after interaction with a field.
http://pointcloudsandbox.cornflex.org
7
votes
3answers
2k views
PythonScript to load data as colored point-cloud
Background
I want to render 3D points with color information for scientific visualization. I have several hundred thousands of points up to 2 million. For each point I have [xyz] coordinates and two ...
6
votes
1answer
845 views
Render 100k objects each with independent color and scale through time
I'm trying to visualize some data that is essentially 100k time series, each with an associated position. I'd like to render this with each object a sphere whose color/scale/alpha is driven by it's ...
5
votes
1answer
2k views
Creating a Fluffy Cloud
I am trying to create a cloud like this
(taken from Is there an easy way to make volumetric clouds for Cycles?)
The closest I am able to get is
I have taken these steps:
Switch to Blender Render
...
0
votes
0answers
1k views
How to create faces/edges from vertices/points?
I can easily delete the faces and edges using delete only edges & faces option. It would be nice to have the possibility to reverse this operation.
Is there a way to create an universal script ...
0
votes
1answer
1k views
Creating a static smoke, saving it and making it interactable
I've created a smoke simulation using quick smoke, I adjusted the values to my liking and ran the sim. (plane of smoke with a collider cube piercing it and the smoke being moved by the cube.) The sim ...
3
votes
2answers
846 views
deleting a fraction of vertices from a point cloud mesh
I have an object in my scene which is basically a point cloud, i.e. all vertices, no edges or faces. I'm trying to select a random fraction of this point cloud. Here is what the data looks like.
<...
3
votes
1answer
826 views
creating n random points on face of mesh
I'm trying to select 400 or so random points on the face of a mesh using a script (just on the face, not inside the volume) but I'm not sure how to do that.
I've tried looking into the following ...
1
vote
1answer
1k views
Using 3d scanned textures
I have been debating on purchasing a 3D scanner to make point cloud references of objects to model for games. For example, use the scanner to create a point cloud object of a character, then import ...
2
votes
1answer
10k views
Importing point cloud to Blender?
I have developed a 3D scanner, this is a relatively fast scan of a big space.
https://www.youtube.com/watch?v=FHAK1L_AQig
The scanner works great. it Provides text files in X; Y; Z format
The only ...
6
votes
2answers
5k views
What is a Point Density texture?
I see Blender 2.76 now has a feature called "Point Density" textures. Is this a particle system? If so, how is it different from previous particle systems?
1
vote
2answers
1k views
How to find evenly spaced coordinates/point cloud of an object?
I'd like to convert a mesh object into a point cloud. I started using the vertices:
...
3
votes
1answer
411 views
Is there an alternative to point density for rendering with GPU?
Finally working with some clouds. Rendering is horribly slow with my i5 CPU, would be much better with a GTX 970, but if I try that then shaders that use point density no longer work. Is there a good ...
5
votes
2answers
5k views
Csv Import pointcloud into Blender
I have 24 points which correspond to 12 different "elements" (2 points per element) saved in an .csv file with the following column order (1: Element Name, 2: x, 3: y, 4: z).
I would like to import ...
