Tagged Questions
1
vote
1answer
43 views
Ray Tracing in 3D - generating a ray
A ray is shot from the camera eye to the camera screen at point (i,j) how do I get the coordinates of that point in 3D world coordinates?
The best I could find online is for point S
S = Q + au + bv
...
2
votes
1answer
145 views
What is an easy way to work subsurface scattering into a raycaster?
I've got some neat effects with path tracing:
I want to add in an ability to do subsurface scattering, but I'm unsure of the general algorithm. With path tracing, it's:
foreach pixel:
trace( ...
1
vote
1answer
245 views
How to calculate the viewing cone radius at a distance in raymarching?
I'm "raymarching distance fields" (proper lingo: sphere-tracing) in GLSL. To implement cone-marching atop of it (and also to minimize the number of raymarching steps regardless of whether ...
