Animation Magic
Learning and science
interactive visualization of 3D animation math
SHOW HN2022
How HN took it
6 positive, 6 neutral or asking, 2 mixed, 5 critical, out of 19 comments about the project. Thread score +0.06.
Execution: 1 for, 3 againstDesign: 2 for, 1 againstIdea: 2 for, 0 againstPerformance: 1 for, 0 againstDocs: 0 for, 1 against
The thread, comment by comment
Each row is a top-level comment and its replies, in HN's order. Select a cell to open that comment on HN.
positive neutral or mixed critical about another commenter or something else the maker
What HN said
What people liked
Visualization is beautiful and educational
From 3 comments
I AM IN LOVE WITH THIS DATA: But hear me out as to why: Surely - the amount of spatial kinematic maths that has been built around how we 'perceive' natural movement within a…
samstave on HNCould you overlay the graphs with a sort of arrow, indicating the the actual direction the quaternion is pointing in? I had no knowledge on animation before, this was a great…
panki27 on HNI love this site, the animations have so much character!
barrysteve on HN
Helpful primer on animation
From 1 comment
Could you overlay the graphs with a sort of arrow, indicating the the actual direction the quaternion is pointing in? I had no knowledge on animation before, this was a great…
panki27 on HN
Objections
Graphs of individual quaternion components are not intuitive
From 1 comment
Nice work, but displaying the time evolution of individual quaternion components is about as intuitive of a visualization as displaying the time evolution of an individual pixel…
aaaaaaaaaaab on HN
Only works well in Chrome; buggy on Safari and Brave
From 2 comments
It's a gorgeous visualization, but it appears the UI is bugging out for me on Brave and Safari in MacOS. The layout has no issue, but I can't select any of the dropdowns.
dwrodri on HNI recommend running it on Chrome. It runs more smoothly there. I'm still improving the performance on Safari.
diegomacario on HN
Lacks explanation of the math itself
From 2 comments
I don't see any math, only visualization, where is the mathematical concepts and equations explained again?
suyash on HNI agree. For example I don't see a link between a given graph and one particular joint. The README says each joint has (3 + 4 + 3) values but I only see graphs with 4 curves.…
dolmen on HN
Requests
Overlay direction arrows on the graphs
From 1 comment
Could you overlay the graphs with a sort of arrow, indicating the the actual direction the quaternion is pointing in? I had no knowledge on animation before, this was a great…
panki27 on HN
Label each graph and link curves to specific joints
From 1 comment
I agree. For example I don't see a link between a given graph and one particular joint. The README says each joint has (3 + 4 + 3) values but I only see graphs with 4 curves.…
dolmen on HN
Pause and speed controls, and sync graphs
From 2 comments
I agree. For example I don't see a link between a given graph and one particular joint. The README says each joint has (3 + 4 + 3) values but I only see graphs with 4 curves.…
dolmen on HNCould you overlay the graphs with a sort of arrow, indicating the the actual direction the quaternion is pointing in? I had no knowledge on animation before, this was a great…
panki27 on HN
Questions
Why curves are sampled per frame and how sampling works
From 1 comment
I'm a little confused about why the curves are "sampled" to update the joint transformations: ``` So if we are rendering 60 frames per second, we are basically doing the…
saeranv on HN
Whether dual quaternions are relevant
From 1 comment
Got it! I think you should also read up on dual quaternions for more mind-blowing math if you haven’t done so yet!
aaaaaaaaaaab on HN
Alternatives named
Geometric algebra (rotors) as a replacement for quaternions
From 1 comment
On the subject of quaternions, here is an article that pops up on HN from time to time. https://marctenbosch.com/quaternions/ It is called "Let's remove Quaternions from every 3D…
GuB-42 on HN
Grant Sanderson and Ben Eater quaternion videos
From 1 comment
Wow that's fascinating, thanks for sharing it! Although I disagree with how the author describes quaternions as black boxes. The two questions he asks: - Why does i2=j2=k2=−1 and…
diegomacario on HN