All Questions
7
questions
0
votes
2
answers
217
views
Relative coordinates -- cumulative sum
I have a vertex shader happily producing all the vertices I want for a 2D plot. Now I want to also render a plot of the same data, but each point relative to the previous one, like SVG Paths using <...
- 11
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
1
answer
1k
views
How do I efficiently calculate the distance to the edge of a shape?
I'm trying to implement something like an "inner glow".
That is, I have an image which defines the shape of an object, and then
I want to create overlay that is a gradient that goes from the ...
- 131
9
votes
2
answers
3k
views
Why are oct trees so much more common than hash tables?
When reading papers I commonly find Oct tree implementations of geometry representations to sort the data. However whenever I think about the problem hash tables seem better overall.
Hash tables have ...
- 1,736
8
votes
3
answers
264
views
What algorithm is used in the animation of the uTorrent 's "About window"?
In a recent version of uTorrent , if you open the About Window, you will see an animated background , which is kind of waves that go on forever.
How can this be achieved? Is this kind of a well-known ...
- 103
7
votes
1
answer
252
views
Shadow map projection issue
I am using Unity but this question might not be proper to this engine.
I have projected the shadow map onto this sphere but there are grazing shadows. Is it possible to avoid it or to correct it as I ...
- 1,229
8
votes
1
answer
896
views
How to implement a realtime 2D light renderer with fog/colored light on the GPU?
Since long ago I wanted to implement a 2D lightning algorithm based on an idea I saw on YouTube. The video is realtime, but it runs on the CPU and the resolution is pretty low. I'm curious if anyone ...
- 253