skye-adaire

6 ms·

1.
by skye-adaire 5y ago
https://youtu.be/ntMYssVeyl0
2.
by skye-adaire 6y ago
> In offline rendering we usually just have some primitive (sphere, cube etc) that acts as the boundary Right, using a SDF as a boundary condition is to discretely check it as an indicator function (if negative do x else do y). You can
3.
by skye-adaire 6y ago
> SDF is still just a surface/boundary representation Meshes and Bezier patches are parametric representations (defined over R^2, evaluated with vec2, output vec3). Implicit functions are volumetric representations of surfaces (def
4.
by skye-adaire 6y ago
> Are there applications you have in mind where the distance to the nearest surface is actually useful, regardless of the surface representation? Distance fields are a subset of implicit functions (see wikipedia). The use of level curve
5.
by skye-adaire 6y ago
This is a bit confused. Current RT implementations are faster at intersecting the mesh along the ray direction than sphere tracing (which require the expensive lookups or evaluations). The distance to the surface is independent of directi
6.
by skye-adaire 6y ago
>Why are SDFs useful at all? Meshes and bezier patches are boundary representations with no information of the volume they enclose. Imagine you'd like to cut an object out of smoke or clouds. SDFs enable you to cut out arbitrary vol
7.
by skye-adaire 6y ago
Memory savings are the main potential gain, since you won't need as deep a tree. This is not the main issue with this tech atm. Also, their distance output will be an estimate, it won't be exact, which will cause render time to un
8.
by skye-adaire 6y ago
It's easiest for laptops, since the laptop trays have adjustable angle. If you need a desktop monitor, you can get an over-bed table and mount a small VESA mounting arm. If you can spend 1k, the absolute best is to get a medical VESA a
9.
by skye-adaire 6y ago
Why reinvent the bed? All you need for a lay down desk is a 12 inch orthopedic foam wedge and a laptop tray. Both readily available in Amazon. I've been working this way for years.
10.
Show HN: Algebraic Modeling – design 2D and 3D shapes using polynomials(github.com)
5 points by skye-adaire 7y ago|0 comments