Questions tagged [theory]
The theory tag has no usage guidance.
7
questions
0
votes
3answers
51 views
FLOP - exact definition
I am interested in how much a GPU can actually calculate. When learning about rendering, it seems like a good idea as well.
My Question:
WHAT EXACTLY is a Floating Point Operation?
I know what a ...
0
votes
0answers
46 views
coverage vs transparency
2D application users seem to be using transparency as a proxy for coverage more often than not. However they are not the same, although nearly everybody makes the assumption that they are.
Given that ...
1
vote
1answer
320 views
Difference betwen Rendering Equation, Lighting model, Ray Tracing, Global Illumination and Shadows?
What is the difference between all these techniques? I know what a lightning model does, eg Phong, Flat, Gouraud. As far as I know both Ray Tracing and Global Illumination are just lighting models ...
3
votes
1answer
500 views
Rendering Fluid Simulations?
I've read about Lagrangian and Eulerian fluid simulations and here's what I take from their methods:
Lagrangian - Simulating fluid particles by calculating displacement for each particle
Eulerian - ...
4
votes
1answer
193 views
Pixel density / color channel depth ratio for dithered gradients
Dithering increases percieved color depth by adding a "noise" to an image on transform from high color depth (e.g. 32-bit floating point) to lower color depth (e.g. 8-bit integer). A prerequisite is ...
12
votes
0answers
512 views
Problem with definition of BSDF and radiance
When I was reading theory behind physical based rendering I noticed that definition of BSDF and radiance has some problems. For example BSDF of purely specular surfaces is zero almost everywhere and ...
17
votes
1answer
471 views
Why integrate over a hemisphere (and not a sphere) to solve the rendering equation?
In most text books that I have seen, this is how the rendering equation is written:
$$L_0( \omega_0)= L_e(\omega_0)+\int_{\Omega}{f(\omega_i, \omega_0)L_i(\omega_i)\,\mathrm{d}\omega_i}$$
Where $\...
