Questions tagged [coordinates]

Blender represents locations in a scene by their coordinates. The coordinates of a location consist of three numbers that define its distance and direction from a fixed origin.

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20 views

Bounding box of 3D object in 2D render is offset

I am currently trying to translate a 3D object in my Blender scene to a region of interest in the respective 2D render. I have found these solutions 1, 2, and 3 that make use of the ...
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1answer
81 views

How to apply driver based on geometry-node-generated coordinates

I had an idea that I'm attempting to implement with Blender geometry nodes. Basically, a swarm of scarabs, which should open and close their wings when their z-height is close to a certain value. I've ...
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61 views

Which matrix to use to transform children local coordinates to global?

Setup I have an object Plane with 6 vertices. To each vertex I assign another object as child. Then I apply two keyframes on location to object Plane: In frame 0 it goes to Z = 5 In frame 81 it goes ...
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Two objects right next to each other, but wildly different coordinates [duplicate]

Can someone explain why the coordinates on these two objects are so drastically different? The Y direction, which is UP/DOWN in this view, should be the same between these two objects. But they ...
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20 views

Extract object coordinates on from Keyframes and save in external file [duplicate]

I wish to create the animation of a robot on Blender and simulate the same animation in Webots to check for feasibility. For this, I'm thinking of extracting coordinate data from all objects in the ...
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1answer
26 views

Drivers breaking down after model transformation

I am currently modelling a complicated gearbox and I am using drivers to model the relations between the parts. There are multiple gears turning in different ratios and to each gear, a few parts are ...
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22 views

How to align local coordinate with object?

I created hundreds of cylinders, joined them into a single object, then splitted back by mesh -> separate -> by loose parts in Edit mode. The splitted-back ...
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1answer
32 views

Trying to understand coordinate spaces in python

In a sense I have "solved" my original problem but I don't understand why/how its solved. I have a script that generates a number of objects and then attempts to create straight lines via a ...
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1answer
47 views

How do I keep two softbodies in the same position?

I have two softbody cubes, one is smaller than the other. They are both aflling at the same speed, but the problem is that when the bigger cube lands, the smaller cube goes all the way down. Is there ...
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How can I see the coordinate/transformation change when I change the pose of a model?

For example, if I rotate the right forearm of my model in blender, how can I see that the model's forearm changed numerically?
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2answers
188 views

Select everything inside the UV 0-1

I have a problem that I can't solve on my own. I want to select (or in my case deselect) everything that's inside the UV 0-1 space. I have a specific workflow that I follow and all my objects are ...
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1answer
49 views

Update child coordinates relative to parent

I'm facing an apparently well known issue with Blender that was already described here. Basically, when I create a new object at world level and then make it the child of another object, its ...
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1answer
46 views

Copy light location in relation to object

I am just starting out with blender and could use some help. I imported an .fbx from Revit and it works great. I have some streetlights in this project and when i change one of them in blender then ...
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26 views

How to fix an image texture to object and camera?

I've looked for a similar problem but couldn't find anywhere, so here it goes. I'm having an issue with fixing the position of this image in the body of the sphere, as you can see, it leaves the ...
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1answer
47 views

Understanding axis locking and local coordinate systems

I'm having trouble understanding axis locking methods, specifically in regards to local coordinate systems. I have three questions about this topic. In most explanatory threads on the internet its ...
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1answer
56 views

Importing shapefiles with other CRS other than Web Mercator and WGS84_latlon

New to Blender. I have correctly installed and activated the BlenderGIS and the bpyproj addons. The GIS module allows me to add a new CRS searching by the EPSG number when I try to import the shp. ...
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1answer
29 views

Saving objects' coordinates as RGBA

I need to save multiple objects' location in XYZ as RGBA data on an image. The colors should match that of blender in metric, so if I move the object up 105.4 centimeters in blender, the color should ...
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1answer
17 views

Can I define a coordinate system based on a mesh, as generated coordinates are based on a bounding box?

I am making a procedural cloud based on CGMatter's which takes the shape of the mesh assigned the cloud material, with the added ability to 'shrink' the initial (pre-distortion) volume box so the ...
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1answer
50 views

How to Copy and Paste Vertex Coordinates?

I have two meshes that are almost identical to each other. Mesh 1 is a human head, and Mesh 2 is the same head but cut in half. (think no mirror modifier) Both have the same topology where it would be....
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42 views

How to get real location (coordinates) of an object

When I applying modifications like "Track To" or/and "Copy Rotation" to object, it location of the object on Numeric Panel (Transform) does not changes but the object really change ...
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31 views

Any way to automatically move every UV Vertex inside the texture bounds?

I model in Sketchup and sometimes I need to make a 3D model with a single material, and uvmap must be unwrapped inside XY boundaries. However Sketchup is randomly placing uv maps all over the infinite ...
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32 views

Procedurally convert other coordinates into UV coordinates

Is there a way to convert from any sort of 3D coordinates into any given object's UV coordinates? I currently have a setup like this: The node group gives me a 3D grid so it needs some sort of 3D ...
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26 views

Is there an input box for world rotation location?

I only see transform location, rotation (Local). How to influence world coordinate, by inputting number in pose mode?
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1answer
34 views

Get height value at specific x and y coordinate via script

It may be simple but I don't get it to work. I have ground objects and several other objects that should stand on the ground. These other objects are automatically positioned. The x,y coordinates are ...
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1answer
229 views

Python: How to identify (by index) the edge closest to a given location?

I want to find the edge index of an edge, for the purpose of performing some operation on that edge programmatically. If I know where that edge is in a simple mesh (for example if I know its Z ...
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1answer
144 views

How to make an object automatically take the same height as another object?

I am currently working on recreating a city in Blender. I have two 3D versions of this city: the first one comes from my lidar data, therefore it is deformed and very "raw". The second one ...
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21 views

Click on mesh coordinates in python API

Is there a way to get the exact coordinates where you click on a mesh in python code? Faces can be big, so the vertices are not really good enough.
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Need a function to determine an object's rotation axis, based on it's orientation

Working on a project with some Python scripting to allow users to flip an object on any axis, and then use a routine that will rotate the object along the circle as shown in the pic below. My problem ...
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How can I create a 3D model of the CIELAB color space? [duplicate]

My professor and I are trying to create and print a 3D model of the CIELAB color space for one of my Master's studies. He has provided me with a CSV of the color space's data points (which you can ...
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21 views

Babylon files to GLB skips UV's

I am wondering how does exchanging a BabylonJS file between 3ds Max and Blender works. When you receive a BabylonJS file you need to convert it in BabylonJS Sandbox to GLB The BabylonJS file has a ...
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10 views

How do you move he head of a bone with respect to the parent's head location and not the global coordinate system?

(Blender 2.90) I am connecting bones together from a specifications sheet and I need to specify dimensions between bones. I know that you can exactly translate bones with respect to the global ...
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1answer
54 views

Modal operator to: (A) Create surface (B) create vertex on surface

Would like to find some tutorial and documents for blender 290 about python vectors, raycast and modal. i am doing my best trying to create this tool, right now i can only create new object, add them ...
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1answer
260 views

Blender: Project a map on a sphere

I have a portion of a map, with its coordinates, and I want to project it in its correct position on a sphere, like on a planet. This map is a geotiff image with its geographic coordinates. I traid to ...
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Transformation for parented objects

I need the actual definitions for the transforms of parented objects. It seems that the transform shown when pressing N shows the local transform, and not the global one for child object? That would ...
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3answers
86 views

Can I get vertex's coordinates result of cloth simulation?

blender version==2.9. I want to get vertex coordinates result of cloth simulation(with python script, if I could). Now, although I could get the vertex coordinates, they are before cloth simulation. <...
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273 views

How can Particle Objects copy emitter's color texture?

I'd like to make a scientifically accurate animated snake using particle objects (and no, sculpting or bump mapping won't be realistic enough because real scales don't actually shrink and stretch when ...
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1answer
64 views

How I can find the the 3D location of the vertex Groups in Mixamo character?

I added an animated 3D character from mixamo and I need to find the "3D location of the vertex Groups" ( I am completely new to this software ) I found it a little similar to my issue but it ...
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43 views

Blender to OpenGL coordinates

I have a model rigged in blender and I'm trying to get it to animate it with respect to OpenGL coordinates (-Z front, Y up) so I can put it in my game engine. I tried hardcoding everything in blender ...
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1answer
198 views

Move object to 3D-Cursor but only on one axis

I often find myself in situations where I want to move an object to just one specific coordinate of the 3d-Cursor. Like in below example I want to move a wheel along the y-axis to the center given by ...
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17 views

Where does Blender store the vertex cuts the knife tool is making while it is making the cuts?

Once the knife cut is finished, the vertices it's created are easy to find. What about when the knife tool is actively cutting something, as in when the cursor has become the knife tool and clicking ...
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2answers
253 views

How to get 3D points of a Mesh in world space coordinates? [duplicate]

I have a blender file with this scene (below) seen from the camera. Now I need to get the 3D points of the mesh (the doughnut) in world space according to the camera perspective, pragmatically. ...
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2answers
104 views

How to set object at a specific depth from the camera, at a certain pixel

I want to set an object at a certain distance (or depth) relative to the camera; and also at a particular pixel. Example: I set up a camera at a random position in blender. I want an 1280x720 image. ...
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1answer
76 views

Why is my rotation method sometimes incorrect for parented objects

I wrote Python's function to rotate a object 'o' direction, step by step, to 'directionW' direction. When the o has no parent, the function works great. But, when the o has one or more parent, ...
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0answers
32 views

How to get direction vector in term of image coordinate for rendered images?

I am rendering images of eye for different look at points. I have look-at vector(direction) that i calculate inside blender from the center of the eye object to the look-at point. Since I need to ...
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0answers
40 views

Adding a plane given 4 vertices in a transformed mesh

Given a mesh (i.e. plane), I have assigned 4 vertices (selected in the picture) to a vertex group. Using the Python API, this mesh is moved and partly rotated by the bones. Now I want add a new (...
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36 views

Object coords not updated when exporting/importing

I'm new to Blender and have a face model with scale of 1. Exported the blender model as STL file which matches the Blender model. Exported the coordinates and plotted them in Python which measures as ...
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1answer
337 views

How to Get Object's Coordinates to Display as 0,0,0 when Parented, and Update Transform Values as if Parent was at World Space Origin?

When child object transforms are zeroed out, I want the child object to return to the current world space location of its parent, and report 0,0,0 in the child's location transform fields. In addition,...
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1answer
63 views

Empties are not transforming

Hi, I was following this tutorial https://www.youtube.com/watch?v=K02hlKyoWNI&t=495s for camera to path. There was a shorcut Alt+G to centre and object. Since I did the same there was some ...
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1answer
43 views

Convert Sphere UV Coordinates to Object Coordinates

I am trying to procedurally flatten out roughly one half of a sphere by using displacement. This would be easy to do by using Object or Texture Coordinates, but since I need these to be preserved for ...
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1answer
42 views

How do I project a texture onto an object on a single axis instead of it wrapping around the object?

I'm trying to get a texture to work along one axis but distort along another, I know this sound weird but I'm trying to emulate a corrugated card effect. At the moment I have your standard node setup: ...

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