All Questions
Tagged with algorithm mathematics
20
questions
1
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0
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26
views
How to morph a enclosing mesh according to the enclosed mesh?
I am quite new to meshing and mesh manipulation. I am working on a problem consiting of meshes $A$, $B$, and $C$. The mesh $C$ completely encloses the meshes $A$ and $B$ as shown in the attached ...
- 11
0
votes
1
answer
114
views
Extrapolating geometry across a triangle mesh?
Say you have 2 parametric cylinders represented as triangle meshes with very different geometries and you connect them together.
Is there a method that allows you to join them together such that the ...
- 1,736
1
vote
0
answers
64
views
Piecewise smoothing of a mesh?
Kobbelt et al. published a paper some 20 years ago where they specified how solving Poisson equations on the positions of a mesh lead to removing noise. This can be used for reconstructing mesh ...
- 1,736
0
votes
0
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20
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How is re projection usually implemented in remeshing?
I was reading "Polygon Mesh Processing" and in chapter 5 the authors present this little algorithm:
...
- 1,736
4
votes
2
answers
856
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Can you explain to me the Bresenham's line algorithm in simple terms?
I've been trying to wrap my head around this algorithm, and I need it for my drawing function. But I can't seem to understand it.
The Wikipedia page gives this piece of code right at the end:
...
- 41
0
votes
1
answer
153
views
Plot inverse of emulated double-precision floats
I need to accurately plot a line chart using WebGL. The numbers have a precision of around 33 bits - that's too many to fit into a single-precision float's mantissa. WebGL does not support the double-...
- 101
2
votes
1
answer
510
views
Having trouble implementing distance transform with jump flood
I'm attempting to use the jump flood algorithm to compute distance transforms of an arbitrary texture derived from a canvas2d context, roughly following the explanations detailed here/here.
In the ...
- 23
3
votes
0
answers
43
views
Is this way of transforming QMC samples into barycentric tri coordinates agnostic to mesh-topology?
While I'll try my best to give all relevant info in all possible brevity below, please refer to the spoiler and link at the bottom of the post for the (more lengthy) original description if needed.
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1
vote
1
answer
77
views
Subdivision scheme where the faces and edges have weights (not necessarily scalar weights)
Subdivision schemes work by considering the vertices and their connectivity information to calculate averaging weights.
However, other than specifying which vertices are connected, and perhaps which ...
- 1,736
1
vote
1
answer
832
views
How to handle Half edge boundary edge iteration from vertex?
Ok so let's say we have a portion of a mesh that looks somewhat like this:
A triangle fan with one of the triangles removed. If that triangles was not removed, we could get all the edges adjacent to ...
- 1,736
3
votes
1
answer
219
views
How do people come up with subdivision schemes?
Be it chaikin subdivision, loop subdivision, catmull-clark subdivision...
How do people come up with the coefficients for an arbitrary subdivision scheme?
- 1,736
3
votes
3
answers
236
views
Estimating the position of vertexes in a 3D model
Introduction to my project:
We are machine learning scientists and working on a biomedical system for tracking tongue for speech pathology using a technology called EMA (Electromagnetic articulography)...
- 31
1
vote
0
answers
47
views
How can I detect if an edge has flipped during the UV unfold process?
I'm writing my own UV Unfold operation (similar to Maya's Optimize UV tool or 3DS Max's Relax Tool). My code works great 90% of the time but in some instances, I'm getting faces and edges that flip ...
- 11
4
votes
0
answers
294
views
Pre-filtered environment map, deriving the equation
I'm reading through this article, and more specifically I'm trying to derive the equation that would explain the implementation the following shader (still in the same article):
...
- 566
3
votes
1
answer
567
views
Can someone explain this formula for parse RGB to HSL?
Im trying to complain the algorithm to calculate the HSL value form a RGB color. I understand the algorithm for the Hue, but im lost with the Lightness and saturation. Someone can explain why?
There ...
- 31