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Tagged with normal-mapping raymarching
2 questions
2
votes
1
answer
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Approximating surface normals from signed distance bounds
In John Hart's paper, at page 5-94 he mentions that - "The surface normal function can be avoided by using a
general six-sample numerical gradient approximation of the distance bound gradient&...
- 23
5
votes
1
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How to compute normal of surface from implicit equation for ray-marching?
I want to represent ovaloids with ray-marching. I have ovaloids defined with an implicit equation.
For instance, we can consider the equation of an ellipsoid given as: $$ \frac{x^2}{a^2} + \frac{y^2}...
- 153