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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.

79 votes
4 answers
111k views

Is it possible to make Blender a Y-up world?

After learning bits and pieces of Maya, 3DS Max, IMAGINE and XSI I noticed that they all have Y-up worlds with Z being used for depth (naturally). is there a way to make Blender a Y-up world? and ...
user232's user avatar
  • 791
29 votes
2 answers
33k views

3x4 camera matrix from blender camera

In computer vision, the transformation from 3D world coordinates to pixel coordinates is often represented by a 3x4 (3 rows by 4 cols) matrix P as detailed below. Given a camera in Blender, I need ...
rfabbri's user avatar
  • 1,243
13 votes
1 answer
4k views

Digits of precision of vertices coordinates

Vertices coordinates are float or double values ? Is it possible to see them with full precision and not only with the limited precision of the text fields ? Or better is it possible to see the bit ...
user avatar
29 votes
3 answers
25k views

Could someone please explain gimbal lock?

I have read the Wikipedia page on gimbal lock, and am still confused about the entire matter. My understanding is that, using a local coordinate system, if you rotate a model about its X axis then ...
fouric's user avatar
  • 3,251
13 votes
1 answer
17k views

Poly / Bezier curve from a list of coordinates

I'm trying to create curves from a list of points, I have the xyz coordinates in text files. I could make it manually via the python console for a single curve, but I have to do it many times and I ...
Matteo Caffini's user avatar
10 votes
1 answer
11k views

What is blender's camera projection matrix model?

I have question what is blender's camera projection model. I want to use blender to my computer vision experiment which need to compare real photo and CG. For real photo, I used camera matrix K for ...
Kichang Kim's user avatar
8 votes
1 answer
8k views

Why are keyframes in global coords, instead of local coords? (Blender 2.70a)

So, I've been using Blender for several years, including a fair amount of animation, and in the past it's always been useful to align an object with its local coords. I.e. having the y-axis pointing ...
Matt's user avatar
  • 11.2k
5 votes
1 answer
16k views

python script that reads text file containing coordinates and creates a path/curve for object to follow

I am a highschool student working at a college's engineering department for the summer. I just began working in blender and have intermediate knowledge of python. Could anyone share a script they've ...
Alyssa Shorak's user avatar
6 votes
1 answer
5k views

Getting the list of points that describe a Curve without converting to mesh

I've used mathutils.geometry.interpolate_bezier() in the past to create points for a curve using the bezier handle and knot coordinates. from the docs: ...
zeffii's user avatar
  • 39.7k
5 votes
2 answers
2k views

How to get data and edit it on UV map edges?

I have a UV map. I want to get texture pixels around connected mesh sides like this (selected in pink and red): or even on separated islands like this: How to do such thing with Python Blender API? ...
Blender's user avatar
  • 53
6 votes
1 answer
2k views

How to import recorded iPhone gyro data into blender?

I recorded iPhone's rotation and now I want to import these data as x,y,z for object rotation in blender. How can I convert OSC or CSV formats into F-Curves? Thank you for help.
vklidu's user avatar
  • 36.9k
18 votes
2 answers
107k views

How to scale a UV Image Texture?

I have a tiling texture that I prepared for use as a bump map. The problem is that it's too big! I want the texture to display on the model at about 1/8th of the present size, but I can't figure out ...
Mentalist's user avatar
  • 19.3k
6 votes
2 answers
10k views

How can I rotate an object's coordinate system without rotating the object?

I have the following situation with a chimney on a roof: I'd like to slide the chimney around on the plane parallel to the roof. One way I could accomplish this would be if I could somehow rotate the ...
Ryan's user avatar
  • 317
5 votes
2 answers
2k views

Calculate points on a Nurbs curve without converting to mesh

I found this question: Getting the list of points that describe a Curve without converting to mesh But I would like to do the same for a Nurbs curve. This Nurbs curve consists of a lot of splines and ...
jasperge's user avatar
  • 1,945
0 votes
1 answer
792 views

Object Positions Reset On Blender Load

So I am attempting to make a modular environment in Blender, so I'm modeling many pieces in one scene to make sure they all match up properly before separating them out. However, whenever I restart ...
Jestus's user avatar
  • 133

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