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Perlin noise: Difference between revisions
→Algorithm
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# For each point, find the closest corners in the grid and compute the dot product between the vector from the corner and the corner's random vector. | # For each point, find the closest corners in the grid and compute the dot product between the vector from the corner and the corner's random vector. | ||
# Interpolate between these using smoothstep. | # Interpolate between these using smoothstep. | ||
#* In improved perlin noise, use smootherstep which has zero first and second derivatives at the boundaries: | |||
#* <math>\operatorname{smootherstep}(x) = 6x^5 - 15x^4 + 10x^3</math> | |||
==Resources== | ==Resources== | ||
* https://rtouti.github.io/graphics/perlin-noise-algorithm | * https://rtouti.github.io/graphics/perlin-noise-algorithm | ||