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--[[ | |
Implemented as described here: | |
http://flafla2.github.io/2014/08/09/perlinnoise.html | |
]]-- | |
perlin = {} | |
perlin.p = {} | |
-- Hash lookup table as defined by Ken Perlin | |
-- This is a randomly arranged array of all numbers from 0-255 inclusive |
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shader_type canvas_item; | |
uniform sampler2D screen_texture : hint_screen_texture, filter_nearest; | |
uniform float radius = 3.0; | |
void fragment() { | |
vec2 uv = SCREEN_UV; | |
uv.y = 1.0 - uv.y; // seems like the origin changed in Godot 4. | |
vec2 surface = vec2(0.5, 0.2); | |
vec2 center = surface - vec2(0, radius); |