Difference between revisions of "Noise"
| Line 56: | Line 56: | ||
local n = Noise.new() | local n = Noise.new() | ||
| − | -- generate 128x128 texture | + | -- generate 128x128 texture with filtering |
| − | local tex = n: | + | local tex = n:getTexture(128, 128, true) |
-- add it to scene | -- add it to scene | ||
stage:addChild(Bitmap.new(tex)) | stage:addChild(Bitmap.new(tex)) | ||
| Line 73: | Line 73: | ||
n:setFractalGain(0.6) | n:setFractalGain(0.6) | ||
n:setNoiseType(Noise.SIMPLEX_FRACTAL) | n:setNoiseType(Noise.SIMPLEX_FRACTAL) | ||
| − | -- | + | -- set a color table used by noise |
| − | -- | + | -- first value - height (number), must be in range [0..1] |
| − | -- color | + | -- second value - color (number) in hex format |
| − | + | -- third value - alpha (number), must be in range [0..1] (optional, default - 1) | |
| − | { | + | n:setColorLookup{ |
| − | { | + | {0.3, 0x4b3c37, 1}, |
| − | { | + | {0.4, 0xffffff, 1}, |
| − | { | + | {0.45, 0x5c443d, 1}, |
| − | { | + | {0.55, 0x3f6a14, 1}, |
| − | { | + | {0.6, 0x589718, 1}, |
| − | { | + | {0.7, 0x3666c6, 1}, |
| − | { | + | {0.9, 0xd1d080, 1}, |
| + | {1, 0x3463c3, 1}, | ||
} | } | ||
-- generate 128x128 texture | -- generate 128x128 texture | ||
| − | local tex = n: | + | local tex = n:getTileTexture(128, 128, false, {wrap=Texture.REPEAT}) |
-- add it to scene | -- add it to scene | ||
stage:addChild(Pixel.new(tex, 256,256)) | stage:addChild(Pixel.new(tex, 256,256)) | ||
Revision as of 11:21, 3 July 2020
Supported platforms: 
Available since: Gideros 2019.12
Description
FastNoise is an open source noise generation library with a large collection of different noise algorithms.
Orignal documentation: https://github.com/Auburns/FastNoise/wiki
Features
- Value Noise 2D, 3D
- Perlin Noise 2D, 3D
- Simplex Noise 2D, 3D, 4D
- Cubic Noise 2D, 3D
- Gradient Perturb 2D, 3D
- Multiple fractal options for all of the above
- Cellular (Voronoi) Noise 2D, 3D
- White Noise 2D, 3D, 4D
- Texture generation
- Array generation
Examples
Example 1.
require "FastNoise"
local myNoise = Noise.new() -- create FastNoise instance
myNoise:setSeed(456) -- set generation seed
myNoise:setFrequency(0.04) -- how coarse the noise output is
myNoise:setInterp(Noise.HERMITE) -- set noise interpolation type
myNoise:setNoiseType(Noise.SIMPLEX) -- set noise type
for y = 1, 4 do
for x = 1, 4 do
local v = myNoise:noise(x, y) -- generate 2D noise
-- other possible function:
-- myNoise:noise(x) -- 1D noise
-- myNoise:noise(x, y, z) -- 3D noise
-- myNoise:noise2D(x, y) -- true 2D noise
-- myNoise:noise3D(x, y, z) -- true 3D noise
-- difference between noise2D(x, y) and noise(x, y) is that "noise" function uses 3D noise with
-- x = 0, y = 0, z = 0 by default where noise2D uses only 2 values. In other words: noise(x) == noise(x,0,0);
-- noise(x, y) == noise(x,y,0); noise(x,y) == noise2D(x,y); noise(x,y,z) == noise3D(x,y,z)
print(v)
end
end
Example 2. Grayscaled noise image
require "FastNoise"
local n = Noise.new()
-- generate 128x128 texture with filtering
local tex = n:getTexture(128, 128, true)
-- add it to scene
stage:addChild(Bitmap.new(tex))
Example 3. Colored seamless noise image
require "FastNoise"
local n = Noise.new()
n:setFrequency(0.03)
n:setFractalOctaves(5)
n:setFractalLacunarity(2.5)
n:setInterp(Noise.HERMITE)
n:setFractalGain(0.6)
n:setNoiseType(Noise.SIMPLEX_FRACTAL)
-- set a color table used by noise
-- first value - height (number), must be in range [0..1]
-- second value - color (number) in hex format
-- third value - alpha (number), must be in range [0..1] (optional, default - 1)
n:setColorLookup{
{0.3, 0x4b3c37, 1},
{0.4, 0xffffff, 1},
{0.45, 0x5c443d, 1},
{0.55, 0x3f6a14, 1},
{0.6, 0x589718, 1},
{0.7, 0x3666c6, 1},
{0.9, 0xd1d080, 1},
{1, 0x3463c3, 1},
}
-- generate 128x128 texture
local tex = n:getTileTexture(128, 128, false, {wrap=Texture.REPEAT})
-- add it to scene
stage:addChild(Pixel.new(tex, 256,256))
See 3D examples here
Particles flow field
Notes
MethodsNoise.new creates a new Noise object Noise:getCellularDistanceFunction returns distance function type |
EventsConstantsNoise.BILLOW |
