Difference between revisions of "WorkUnit:Particles"
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=== Antialiasing 3d === | === Antialiasing 3d === | ||
| − | More precisely: | + | More precisely: aliasing<ref>Aliasing - https://en.wikipedia.org/wiki/Aliasing</ref> the vector field<ref>Vector field - https://en.wikipedia.org/wiki/Vector_field</ref>'s influence on the particles by using sub-sampling<ref>What is the difference between Binning and sub-sampling in Image Signal Processing? - https://stackoverflow.com/questions/31529379/what-is-the-difference-between-binning-and-sub-sampling-in-image-signal-processi#31529981</ref>, implying identification of a method to go from discrete to continuous<ref>Probability Distributions: Discrete vs. Continuous - http://stattrek.com/probability-distributions/discrete-continuous.aspx</ref>. Below with human words. |
| − | Until this point, particles were influenced by only one cell | + | Until this point, particles were influenced by only one cell at the time, implying brutal trajectory's modification when the forces are different from one cell to the other... |
| − | It | + | It tooks me some a bit of time, but the issue is similar to an exercise I gave to the students at [http://arts2.be arts²]: how to create a gradient between 4 points. In the vector field, the gradient has one more dimension (and therefore uses 8 points) but has the same behavior. |
| − | Any particle is always between | + | Any particle is always between 8 cells, let's call this a '''cluster'''. This cluster does not have to contains the totality of the cells, it must just connect the 8 centers. Therefore, a cluster has exactly the same size has a cell in the vector field, and its position is offset by an half cell. Too simple to see it at the first glance, because it requires to look at the space between center, and not the frontier of the cells (typical case where out-of-the-box thinking is required!). |
[[File:Particles-cells-interpolation 01.jpg|400px]] [[File:Particles-cells-interpolation 02.jpg|400px]] | [[File:Particles-cells-interpolation 01.jpg|400px]] [[File:Particles-cells-interpolation 02.jpg|400px]] | ||
Revision as of 19:17, 19 December 2017
Question here below is simple: how to produce moving images with colored dots. The idea has been experimented in several technical and visual forms, all based on the manipulation of simple basic entities.
Researches related to particles, in different context:
- colliding with a 3d model, researches of 2013
- in relation with a vector field, for Pelléas et Mélisande opéra.
Contents
Vector field as a controller
started on the 15 december 2017
Antialiasing 3d
More precisely: aliasing[1] the vector field[2]'s influence on the particles by using sub-sampling[3], implying identification of a method to go from discrete to continuous[4]. Below with human words.
Until this point, particles were influenced by only one cell at the time, implying brutal trajectory's modification when the forces are different from one cell to the other...
It tooks me some a bit of time, but the issue is similar to an exercise I gave to the students at arts²: how to create a gradient between 4 points. In the vector field, the gradient has one more dimension (and therefore uses 8 points) but has the same behavior.
Any particle is always between 8 cells, let's call this a cluster. This cluster does not have to contains the totality of the cells, it must just connect the 8 centers. Therefore, a cluster has exactly the same size has a cell in the vector field, and its position is offset by an half cell. Too simple to see it at the first glance, because it requires to look at the space between center, and not the frontier of the cells (typical case where out-of-the-box thinking is required!).
History
Fragments #43-44
Fragments#43-44 blends musical improvisation, cinematic soundscapes as well as visuals generated on the fly by an intriguing new body language, src: http://fragments4344.uranium.be/
Colors’ flood on landscape
Demo, september 4, 2013
Resources
References
- ↑ Aliasing - https://en.wikipedia.org/wiki/Aliasing
- ↑ Vector field - https://en.wikipedia.org/wiki/Vector_field
- ↑ What is the difference between Binning and sub-sampling in Image Signal Processing? - https://stackoverflow.com/questions/31529379/what-is-the-difference-between-binning-and-sub-sampling-in-image-signal-processi#31529981
- ↑ Probability Distributions: Discrete vs. Continuous - http://stattrek.com/probability-distributions/discrete-continuous.aspx