Questions tagged [mathematics]
Use of maths inside blender.
265
questions
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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 ...
0
votes
0answers
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.
1
vote
1answer
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 ...
0
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0answers
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, ...
2
votes
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&...
3
votes
0answers
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 ...
1
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0answers
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?
...
1
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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:
...
0
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0answers
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 ...
2
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0answers
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)-\...
1
vote
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 ...
3
votes
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 ...
3
votes
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 ...
0
votes
0answers
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 ...
0
votes
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 ...
0
votes
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.
...
1
vote
0answers
12 views
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 ...
0
votes
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 ...
2
votes
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 ...
0
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0answers
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. ...
1
vote
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 ...
1
vote
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 ...
0
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0answers
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/...
1
vote
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 ...
2
votes
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&...
0
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0answers
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. ...
1
vote
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 ...
2
votes
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 "...
1
vote
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
...
2
votes
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:
...
2
votes
0answers
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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0
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0answers
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.
...
4
votes
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 ...
0
votes
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.
<...
0
votes
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 ...
1
vote
0answers
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'...
0
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0answers
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
1
vote
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 ...
0
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0answers
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....
0
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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 ...
0
votes
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...
1
vote
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 ...
3
votes
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?
0
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0answers
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 ...
0
votes
0answers
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 ...
0
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0answers
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
1
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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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0answers
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 ...
2
votes
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 ...
2
votes
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 ...
