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Blender

Questions tagged [point-clouds]

questions concerning the use of point clouds / data point sets in blender.

40 questions
info newest frequent votes active unanswered
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14 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 ...
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0answers
21 views

How do I import a full-colour pointcloud from Autodesk Recap into Blender?

I have a pointcloud in Autodesk Recap which I can export as (*.rcp / *.rcs / *.pts / *.e57). The scan is of a fairly big workshop and I need to make a fly-through video showing of the different parts ...
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0answers
25 views

How do I get point cloud data from rendering?

I am trying to export point cloud data of the camera when rendering in the blender. So instead of getting point cloud data of single object, I want to render the point cloud data from camera point of ...
0
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0answers
21 views

mesh.matrix_world gives the identity matrix after transformation

I'm trying to extract vertices after transformations using mesh.matrix_world but the matrix_world gives an identity matrix. Why isn't it changing due to the transformatiosn? part of the code is added: ...
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0answers
49 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
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1answer
62 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
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0answers
49 views

E57 file import in to blender

I did't found answer for my question yet so I opening this topik here. I have a E57 file format and I need it to get some how in to blender. Do anybody had such a experiences before? Thank You guys ...
0
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0answers
48 views

Rendering Coloured PLY Point Cloud in Blender

I came across this video on Vimeo the other day: https://vimeo.com/290181848 I was intrigued as to how this was achieved, and in my impulsive search for answers I came across photogrammetry and the ...
0
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2answers
129 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, ...
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0answers
98 views

Generate colored point cloud of the scene and save it to PCD file

I am new to blender and currently learning Blender python scripting. I have a scene composed inside Blender 2.78c. My goal is to achieve following tasks- Generate point cloud of points as XYZ and ...
3
votes
1answer
71 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
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1answer
250 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
3
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0answers
319 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 ...
3
votes
1answer
180 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
481 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 ...
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0answers
32 views

Cycles - Volume materials don't render right if Mist Pass is active

I'm using volumetric water material and generated clouds in scene. When mist pass is active - water obtains fog's color for some reason and clouds just disappear. Upper picture is pre-render and ...
0
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0answers
561 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
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0answers
152 views

Extract skin (external points) from 3D model

I am new in Blender and I don't know how to extract the external part of a 3D model. I want to extract the points that belong to the external surface of the model in each of 3 directions, X, Y, Z. I ...
0
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1answer
509 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 ...
4
votes
2answers
453 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. <...
2
votes
1answer
420 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
811 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
4k 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 ...
5
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2answers
3k 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
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2answers
754 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
324 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 ...
3
votes
2answers
3k 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 ...
1
vote
1answer
360 views

Associate extra scalar data field with mesh or pointcloud

I work with scientific pointclouds and I often have extra columns of data in my .ply files. For example, I might have a column for "temperature" where there is a temperature value for each point or ...
0
votes
0answers
72 views

Color from imported OBJ not displayed in Blender [duplicate]

I want to import some .obj file that I have made with MeshLab. The point cloud file was actually in .pcd format and I used pcl_pcd2ply tools from PCL to change it into PLY-Format. Then I import it ...
7
votes
2answers
2k views

How can I create a point cloud from the surfaces of a model?

How can one go about generating a point cloud from the surfaces/faces of a model? Initially the models are going to be fairly simple (just cubes, cylinders, and spheres), but eventually the models ...
7
votes
1answer
662 views

Render 3 dimensional scalar field

I have a function which assigns to "every" point in space (x,y,z) a scalar value d. I want to, somehow, visualize this function ...
2
votes
3answers
4k views

Draping 2D image over point cloud or mesh

I'm new to blender and could not find this in help files. Can blender be used to drape a 2D image onto a 3D point cloud or mesh? If yes, can someone point me to a tutorial on that?
1
vote
1answer
905 views

Most efficient way to remove unwanted vertices in an object with 59,000 points?

I have imported a 3D-scanned .OBJ file from KScan3D, which is 3D scanning software. I am trying to scan a model car, but would like to remove all the unnecessary points for the purposes of 3D printing....
1
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0answers
37 views

How to draw a colored point cloud from a .ply PCD file and render it? [duplicate]

To generate a point cloud i am using planes in blender, to compensate for unavailability of POINT data primitive. After reading the .ply point cloud file(PCD) the planes are added in the blender scene,...
4
votes
2answers
1k views

Blender gets very slow to draw a scene having large number of plane?

I have a very simple python script to generate planes in the scene. I want to generate 50000 planes in a scene, to compensate for unavailability of POINT primitive, so that i can render a point cloud. ...
5
votes
2answers
8k views

Wrapping a mesh around point cloud with cavities

I have a series of point clouds I want to convert to mesh (there are points inside the object, uniformly distributed, not only on the surface). I want to generate a model of the surface of the point ...
3
votes
1answer
2k views

Programmatically generate random point-cloud within solid mesh

I think I'm nearly there, thanks to two super scripts from CoDEmanX. The first script shows the bounding box around an object: ...
3
votes
1answer
10k views

How can I prepare a point cloud for visualization in Blender using MeshLab?

I have access to some laser scanned LAS files. I can convert the LAS files to X, Y, Z point clouds using LASTools. Once a point cloud is in an X, Y, Z ascii format it can be imported into MeshLab. I ...
5
votes
1answer
790 views

Setting Voxel Coordinates

I've been looking online for a long time, searching for documentation on the subject of Blender Voxel Data. So far, I know that Blender uses many file types, including the .bvox file type. For the ....
7
votes
2answers
5k views

Efficient way(s) to render point clouds of 3D scan datas in cycles

Problem: I would like to render a 3D scan data (so no volume) containing only vertices (no faces or edges) with colour informations in cycles. Tried so far: I tried particles (spawning spheres on ...