Questions tagged [mathematics]

Use of maths inside blender.

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1answer
13 views

Primitive shapes whose parameters are dependent on their relative postiton

Fist time posting. I love Blender (a hobbyist new user making stills and stuff) but if it is not the right software, feel free to send me off. I'd like to have a sphere and a cone whose base is formed ...
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21 views

Is there anyway to differentiate a value ( from the shader editor ) in Blender

The title says it all. Is it possible? bit of a noob question though so hope any of you do not mind. Differentiation refering to getting a derivative of a value.
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28 views

Converting bottle threads from diagram to a 3D model

Goal: I'm trying to model the threads of a polar springs 500ml bottle in Blender 2.8x so I can 3D print an adapter for it. Issue: I'm having issues converting what Blender 2.8x calls Screw and what ...
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15 views

Plotting functions in blender

I've played around with "fractals" following https://www.youtube.com/watch?v=CR7jxw94Tcg but I want to plot my own functions; is it possible to plot any (math) function in blender, logs, ...
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1answer
23 views

Straightening Lines without Straightening Iron

Thanks for looking this over in advance. Hopefully pictures describe this somewhat well- but I'm looking to take the guess out of my guesswork here and have lines which are "perfectly straight&...
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32 views

Cycles - How to transfer information from a shader to another non-destructively ? (no baking)

How can we non-destructively (witouth baking anything into vertex color nor bitmap) transfer information from one shader to another within cycles ? Here's an example : Here is a simple proximity ...
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21 views

Calculating edges and polygon indices in python numerically to build mesh

I can calculate the vertices and faces but how does one calculate edges and polygon indices numerically in python? ...
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3answers
57 views

Updating objects parameters using python creates multiple objects

I can update a text curve object when I change the frame and it doesn't create multiple objects but how can I do the same with a mesh object. Code: ...
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14 views

Creating / Re-creating the X,Y,Z mesh Surface functions with the (u,v) options using python [duplicate]

Creating / Re-creating the X,Y,Z mesh Surface function with the (u,v) options using python in Blender 2.8x Does an example exist / anyone have an example of how to reproduce the X,Y,Z mesh Surface ...
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56 views

Converting / getting parametric equation to work using python

Converting / getting parametric equation to work in Python / Blender / Animation Nodes I can create / plot the parametric equation in Octave $$x=u\sin(u)\cos(v)$$ $$y=u\cos(u)\cos(v)$$ $$z=-u\sin(v)-\...
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1answer
51 views

Trying to animate an extrude in 3D using curves generated by an equation over time

Trying to animate an extrusion in 3D using curves generated by an equation over time. I can create a 3D spiral pattern using python and animation nodes but how can I extrude the curves so they vary ...
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1answer
101 views

Ping Pong Math node - what does it do?

Reading through the math node docs, I came across a math function named "ping-pong". The docs state that ping-pong does the following The output value is moved between 0.0 and the Scale ...
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2answers
177 views

How to calculate movement of a radius of one sphere to intersect another sphere and create a specified distance for the intersection

Attached is a diagram and a picture of my current model and a GIF image what I'm trying to achieve. Sketch: Screenshot: Details: The inner circle is a perfect sphere with a radius of 6.63 The outer ...
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25 views

Is there a way to procedurally loop processes in shader nodes

I'm trying to make a node group that can convert values into "binary" (i know the value will still technically be base 10). I made a set of nodes that if they are recursively placed over and ...
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2answers
45 views

How to turn the Compare Math node result into a gradient?

I need help. I need the bracket (shown by the yellow grid on the floor and ceiling) along Y of this material to have a gradient, that meaning, to have the always "1" return from the Compare ...
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1answer
44 views

Maths question regarding curved bay window

I have been using Archimesh to create floor plans for a representation of my house. Generally, this is OK but it really is not very flexible with curved walls and cannot reflect my bay window at all. ...
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Simulating Shadings Losses for Solar Field, like PVsyst

About Me: I'm an electrical engineer by Profession with some programming experience in Python and applied Machine learning. I am involved in modelling, optimization and data analysis of renewable ...
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1answer
28 views

Is there an alternative to the Geometry -> Normal Output?

This is the matte I need, created from the mesh with this ring displacement using the "normal" output. I will be using a different displacement in the end but I need this specific ...
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3answers
199 views

Proportionally editing an object using a given/exact angle

I can proportionally edit an object (see animation below) but if I want to alter an object to have an angle of 63.45 how can I go about calculating/doing this (I'm testing parameters/limits/tolerances ...
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10 views

Axis flip when using Matrix.to_euler() - how to avoid?

I have a little script that export a camera out of blender and it uses the Matrix.as_euler("ZXY") to extract the rotation values. It all works great as long as it doesn't cross 180 degrees. ...
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1answer
51 views

Creating a Specular using two color channels?

I've been attempting to recreate a game's cel shading and am currently stuck on making speculars function. The main issue is that the speculars are done manually using both the red and blue channels ...
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0answers
24 views

Multiply to Combine XYZ vs Combine XYZ to Multiply

I was translating the object's origin by Vector Math node. Though I'm a bit confused of why feeding Multiply & Combine XYZ on a different order yields different results. I thought both vectors ...
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16 views

Animation node Moebius ring transposed into nodes

I'd like to learn better the use of math formulas in animation nodes. I'm very bad in maths but i would like to define a node set to make a parametric moebius ring i've found https://en.wikipedia.org/...
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1answer
86 views

How to emulate MixRGB (Mix) with math node for Grayscale?

I would like to do a little research, and I would like to simulate a MixRgb type node with a mathematical node, to mix BW type maps, since the MixRGB mixes 3 channels, it would be enough for me to mix ...
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1answer
47 views

inequalities using math node

Using math nodes I generated that pyramid like shape, but I want to impose inequalities. The equation for the following pic is 9-8|x|-y=0 but I want to impose inequalities to the equation where 0.75&...
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12 views

How does the follow path constrain work

First of all thanks to all who make blender such a great software! We're currently trying to find an animation solution for a scientific task and I came to the follow path constraint in my research. ...
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2answers
112 views

Make the dots the color of your logo

The grid shown below is what i have right now but it just overlays. I want the white dots to be using the image texture color. I have this method i have seen with simon tommes. Where he uses a image ...
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0answers
18 views

Get Normal data from smooth Normal

I don't know about "Shade Smooth", but I hope you can help me there. If the mesh has "Shade Flat", then you can read every face with "polygons [i] .normal". Can I also read the "normals" from the "...
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2answers
73 views

Scripting alternative to editing colour based on vertex coordinates using Nodes editor

I am trying to add colour to a mesh object where the colour varies based on the z location of each vertex (similar to a heat map). I am able to do so using the nodes editor (cycles render) into ...
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1answer
50 views

How to plot 1/x^x in Blender using Z function surface

I am looking to plot math functions in Blender using the Z function surface Add-On. It works great for functions such as: 1/x**2 But fails for functions like: ...
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39 views

frame_change_post/pre not working when Rendering Animation [duplicate]

I've got this script file that works flawlessly in the viewport, but stops completely when I start rendering it as an Animation. ...
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27 views

Creating Hydrogen Orbitals with Blende

I want to create a 3D Animation of a hydrogen orbital using the mesh.math addon. Therefore I wrote a short python code. ...
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1answer
64 views

How create Optical distortion effect

I would like to make custom blender transitions similar to the first second of this video https://www.youtube.com/watch?v=mZvQ9ipTK_8 I know that in reality, it's a transition executed outside the ...
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1answer
54 views

Normalize / Create a unit quaternion number / calculation using Python and Blender

I'm trying to work with quaternion math in Blender 2.82a and Python I need to normalize a quaternion number in Blender 2.82a using Python before I do calculations on it but I'm getting an error. <...
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1answer
29 views

Math in Texture Nodes

I’m having trouble figuring out how a math node influences a texture node. Say you have the Musgrave Texture node and put the output into an add node. Does the node add all the values within the ...
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67 views

blender python: evaluate extruded curve points

I need to find coordinates of points extruded from blender's bezier curve with python. All I know right now is how to evaluate each point on the curve(mathutils.geometry.interpolate_bezier) but I don'...
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16 views

How the math node works in shader editor [duplicate]

i am new to blender and can't find how math node works and why math node is working totally differently when connect with different type of nodes , is there any proper documentation on math nodes
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1answer
505 views

Spiral array but with fibonacci sequence

I am trying to make a sunflower. The seeds in a flower grow in a spiral. Whenever I add an array spiral and make it follow the curve, it doesn't seem to look quite right. This is because it doesn't ...
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16 views

Using mouse hit position on screen and a text objects position - how can I work out what character is moused over?

I can get a hitpoint from UPBGE - mouse sensor - and I can get the text object matrix and localize the hitpoint - from here - how would one work out what character is moused over? Local_point = mouse....
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1answer
79 views

Python: Placing objects around a spheres surface with proper rotation

i have a script to duplicate an object, and place the duplicates at random coordinates around a spheres surface, and then point those objects away from the center of the sphere. It almost works but ...
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1answer
48 views

Count of multiple face areas

is any way how to display total faces area of selected faces in Blender 2.8? Manually counting isnt possible...I want count 1000 and more faces...
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0answers
39 views

How to make a math function with equal sign in blender?

I was trying to make a circle . I tried to use this function (xx)+(yy)=a. Making (xx)+(yy) was easy but how i should go about making =a part in blender shader editor? (also it would be great if ...
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1answer
131 views

Node editor Hexagon

I currently have the Maths expressions addon installed in blender. I know it has a hexagon preset already, but it comes up with this: 1) How do I fix this? 2) How do I make a hexagon?
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60 views

How do I convert camera coordinates to world coordinates?

Blender has a great function to convert world coordinates to camera coordinates. However, in my case I am trying to do the exact opposite and can't find an existing method of doing so. I have tried ...
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28 views

Python : Negative scale causes global rotation discrepancies

I'm currently working on a system using Blender to export some scenes to a game engine. To do so, I've written a Python script reading the scenes and writing the files as needed. So far I've had no ...
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32 views

How to plot XYZ dataset? [duplicate]

I have a text file with a set of 3D points. How can I plot it and generate a Mesh surface like in the given image? enter image description here
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1answer
70 views

How do i convert this equation into the node editor?

How do I make this in the node editor? I don't get how to go around y=(-x)
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66 views

How to configure the python values to fix the facial movements of a new 3d character not originally thought to work with those

I've just tracked and saved on the timeline the facial movements of Victor using OPEN CV and following this tutorial : https://www.youtube.com/watch?v=RY_eErKlilw The result has been good,as u can ...
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2answers
270 views

Calculate sphere's rotation for rolling

Let's say that there is a sphere whose x,y,z dimensions are d. So, the circumference is d*pi. Now, the sphere is rolling on a ...
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1answer
94 views

looping through splines of a bezier circle, can only find 1 spline not 4

I'm trying to port differential line growth to blender animation nodes following this example https://vimeo.com/169438763 . I was suggested to work with splines in blender as it would be a lot simpler ...

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