Jumble of Thoughts: here I give myself the liberty to freely write down anything, without caring about correctness, completeness, formatting
or relevance. Those draft may be incomplete, incorrect, or just plain wrong. I may convert those notes into a proper article later on, or not.
[Deformer Graph] notes
Unreal Engine deformer graph notes. - 03/2025 - #Jumble
[Deformer Graph] DebugDraw node explained (Unreal Engine)
I'll show how to use the DebugDraw node in UE - 03/2025 - #Jumble
Unreal Engine C++: log categories
Creating a log category in UE - 02/2025 - #Jumble
[Maya] How to find and display the Orig shape of some deformed object
- 06/2024 - #Jumble
Multivariate Taylor polynomial
Explaining Taylor Series general formula for multivariate functions with examples - 04/2024 - #Jumble
Mean curvature of a parametric surface s(u, v)
Formula to compute the average of the principal curvatures given a vector valued function - 04/2024 - #Jumble
Mean curvature of a 2D function graph z = f(x, y)
Formula of the mean curvature for a surface described with a 2 variable function graph z = f(x, y) - 04/2024 - #Jumble
Gaussian curvature of a 2D function graph z = f(x, y)
Formula of the Gaussian curvature for a surface described with a 2 variable function graph z = f(x, y) - 04/2024 - #Jumble
Gaussian curvature of a parametric surface s(u, v)
Formula to compute the product of principal curvatures given a vector valued function - 04/2024 - #Jumble
Curvature k of a 1D function graph y = f(x)
How to compute the curvature of a function graph with one variable. - 04/2024 - #Jumble
[Maya] Fbx import breaks / corrupts skincluster
Exporting to FBX and importing back into Maya triggers a rebuild of all skinclusters. - 03/2024 - #Jumble
[Maya] get adjacent vertices to a vertex
MEL script to get a vertices directly connected to another vertex. - 02/2024 - #Jumble
[Maya] Edit a mesh after skinning
How to edit a rig after skin binding in Maya - 02/2024 - #Jumble
Definitions for linear, affine transformations etc
Cheat sheet transformations and maps - 01/2024 - #Jumble
[Maya] Create UVPin with MEL
How to create uv pins via mel command in Maya - 11/2023 - #Jumble
Maya parsing command arguments sample code
How to parse list, tuples etc. - 10/2023 - #Jumble
Distance field composition and blending
How to blend or compose implicit surfaces - 09/2023 - #Jumble
2D harmonic stencil a.k.a Laplace operator
Compute harmonic weights on regular grids (Laplacian) - 09/2023 - #Jumble
Maya: create hair follicules with MEL script
How to cleanly create hair follicules on mesh or nurbs. - 09/2023 - #Jumble
Definition of a Positive Definite Matrix
Simple explanation and interpretation of a Positive Definite Matrix. - 09/2023 - #Jumble
First derivative of a Bézier curve (full development)
Development of the velocity of a Bézier curve. - 08/2023 - #Jumble
Unreal Engine Slate UI examples
Cheat sheet to add user interface elements (buttons, combobox etc) in unreal - 08/2023 - #Jumble
Display skin weights in Unreal Engine (Skeletal Mesh Editor)
How to show / view the skinning weights of a skeletal mesh in UE - 08/2023 - #Jumble
Simple animation smoothing algorithm
An easy trick to smooth animation keyframes - 06/2023 - #Jumble
[Deformer Graph] how to add custom nodes to the deformer graph in UE (C++)
Writing a Plugin in Unreal Engine to extend the capabilities of the deformer graph with new nodes. - 06/2023 - #Jumble
Summary: Permutation Arrangement Combination
Combinatorics cheat sheet - 05/2023 - #Jumble
C++ code for 2x2 and 3x3 Eigen decomposition
C++ code for 2x2 and 3x3 Eigen decomposition - 05/2023 - #Jumble
MEL how to specify the skin weight value of a joint
In maya, using MEL command how to set the value of a skin weight given a specific joint - 05/2023 - #Jumble
Handling types with Python
Some notes and pointers on using types with Python - 04/2023 - #Jumble
How to clear out (set to 0) the rotation of a joint in Maya
Reset the "rotate" attribute of a Maya joint without changing its "Joint Orient" attribute or its world position - 04/2023 - #Jumble
MEL and Python code to change / reset the bind pose of a skinned mesh in Maya
How to edit the bind pose of a skin cluster in Maya - 04/2023 - #Jumble
MEL and Python code to restore joint positions to their bind pose based on skincluster's .bindPreMatrix
Go to bind pose that works even when bindPose node is corrupted - 04/2023 - #Jumble
MEL and Python procedure to invert a 4x4 matrix in Maya
MEL & Python script code to compute the inverse of a matrix represented as an array of 16 floats - 04/2023 - #Jumble
Bi-harmonic diffusion to smooth weight maps over meshes.
- 05/2019 - #Jumble
Skin weight optimization (lagrange) (4)
- 11/2018 - #Jumble
Skin weight optimization (matrix form) (3)
- 07/2018 - #Jumble
Matrix form second attempt
Skin weight optimization (matrix form) (2)
- 07/2018 - #Jumble
(Matrix form first attempt)
Skin weight optimization (main)
- 04/2018 - #Jumble
Compute barycentric coordinates of a tetrahedron
A compact computation with matrices - 04/2014 - #Jumble
SDF blending operators research paper list
A list of research papers about combining implicit surfaces a.k.a signed distance field. - 03/2013 - #Jumble
C code for 4x4 matrix inversion
Just leaving some code here to invert either column or row major 4x4 matrices.
Upgrade to CUDA 5.0: cudaMemcpyToSymbol invalid device symbol error
- 12/2012 - #Jumble
You have just upgraded to CUDA 5.0 and the function cudaMemcpyToSymbol() throws you the infamous "invalid device symbol" error. Here is what to do.
CUDA constant memory, namespace, and weird bugs
- 09/2012 - #Jumble
Edit: the usage of cudaMemcpyToSymbol describded below is deprecated since CUDA 4.1 (See also my new entry Upgrade to CUDA 5.0: cudaMemcpyToSymbol invalid device symbol error)
Today I want to discuss some issues I had with CUDA constant memory and share some workarounds.
Drag and drop not working in QTDesigner or QTCreator designer
- 06/2012 - #Jumble
This has upset me for some time and I finally found a forum entry solving this problem.
The problem: I wasn't able to drag&drop in QTDesigner any widgets from the widgets list to the form I was editing.
Solution found here: qtforum.org
You only need to add this entry to your /etc/X11/xorg.conf:
Section "Module"
Load "extmod"
EndSection
Broken F4 shortcut in Qtcreator for cuda files ".cu"
- 06/2012 - #Jumble
Well I'm using QtCreator to code my CUDA project and there has been a lot of things bothering me. Among them is this F4 shortcut which doesn't work. The shortcut enables switching between the header and source file but apparently the extension .cu is not recognized as a C++ source file. Here is how to fix it.
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