33 lines
1.3 KiB
Kotlin
33 lines
1.3 KiB
Kotlin
package org.openrndr.extra.noise
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import org.openrndr.math.Vector2
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fun perlin(seed: Int, x: Double, y: Double) = perlin(seed, x, y, ::linear)
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fun perlinLinear(seed: Int, x: Double, y: Double) = perlin(seed, x, y, ::linear)
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fun perlinQuintic(seed: Int, x: Double, y: Double) = perlin(seed, x, y, ::quintic)
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fun perlinHermite(seed: Int, x: Double, y: Double) = perlin(seed, x, y, ::hermite)
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fun perlin(seed: Int, position: Vector2) = perlin(seed, position.x, position.y, ::linear)
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fun perlinLinear(seed: Int, position: Vector2) = perlin(seed, position.x, position.y, ::linear)
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fun perlinQuintic(seed: Int, position: Vector2) = perlin(seed, position.x, position.y, ::quintic)
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fun perlinHermite(seed: Int, position: Vector2) = perlin(seed, position.x, position.y, ::hermite)
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inline fun perlin(seed: Int, x: Double, y: Double, crossinline interpolator: (Double) -> Double): Double {
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val x0 = x.fastFloor()
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val y0 = y.fastFloor()
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val x1 = x0 + 1
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val y1 = y0 + 1
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val xs = interpolator(x - x0)
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val ys = interpolator(y - y0)
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val xd0 = x - x0
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val yd0 = y - y0
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val xd1 = xd0 - 1
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val yd1 = yd0 - 1
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val xf0 = lerp(gradCoord2D(seed, x0, y0, xd0, yd0), gradCoord2D(seed, x1, y0, xd1, yd0), xs)
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val xf1 = lerp(gradCoord2D(seed, x0, y1, xd0, yd1), gradCoord2D(seed, x1, y1, xd1, yd1), xs)
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return lerp(xf0, xf1, ys)
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} |