package core:math/noise

Overview

OpenSimplex2 noise implementation.

Ported from https://github.com/KdotJPG/OpenSimplex2.
Copyright 2022 Yuki2 (https://github.com/NoahR02)

Index

Types (3)
Constants (0)

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Variables (0)

This section is empty.

Procedure Groups (0)

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Types

Vec2 ¶

Vec2 :: [2]f64
 

Input coordinate vectors

Vec3 ¶

Vec3 :: [3]f64

Vec4 ¶

Vec4 :: [4]f64

Constants

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Variables

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Procedures

noise_2d ¶

noise_2d :: proc "odin" (seed: i64, coord: [2]f64) -> (value: f32) {…}
 

2D Simplex noise, standard lattice orientation.

noise_2d_improve_x ¶

noise_2d_improve_x :: proc "odin" (seed: i64, coord: [2]f64) -> (value: f32) {…}
 

2D Simplex noise, with Y pointing down the main diagonal.

Might be better for a 2D sandbox style game, where Y is vertical.
Probably slightly less optimal for heightmaps or continent maps,
unless your map is centered around an equator. It's a subtle
difference, but the option is here to make it an easy choice.

noise_3d_fallback ¶

noise_3d_fallback :: proc "odin" (seed: i64, coord: [3]f64) -> (value: f32) {…}
 

3D OpenSimplex2 noise, fallback rotation option

Use `noise_3d_improve_xy` or `noise_3d_improve_xz` instead, wherever appropriate.
They have less diagonal bias. This function's best use is as a fallback.

noise_3d_improve_xy ¶

noise_3d_improve_xy :: proc "odin" (seed: i64, coord: [3]f64) -> (value: f32) {…}
 

3D OpenSimplex2 noise, with better visual isotropy in (X, Y).

Recommended for 3D terrain and time-varied animations.
The Z coordinate should always be the "different" coordinate in whatever your use case is.
If Y is vertical in world coordinates, call `noise_3d_improve_xz(x, z, Y)` or use `noise_3d_xz_before_y`.
If Z is vertical in world coordinates, call `noise_3d_improve_xz(x, y, Z)`.
For a time varied animation, call `noise_3d_improve_xz(x, y, T)`.

noise_3d_improve_xz ¶

noise_3d_improve_xz :: proc "odin" (seed: i64, coord: [3]f64) -> (value: f32) {…}
 

3D OpenSimplex2 noise, with better visual isotropy in (X, Z).

Recommended for 3D terrain and time-varied animations.
The Y coordinate should always be the "different" coordinate in whatever your use case is.
If Y is vertical in world coordinates, call `noise_3d_improve_xz(x, Y, z)`.
If Z is vertical in world coordinates, call `noise_3d_improve_xz(x, Z, y)` or use `noise_3d_improve_xy`.
For a time varied animation, call `noise_3d_improve_xz(x, T, y)` or use `noise_3d_improve_xy`.

noise_4d_fallback ¶

noise_4d_fallback :: proc "odin" (seed: i64, coord: [4]f64) -> (value: f32) {…}
 

4D OpenSimplex2 noise, fallback lattice orientation.

noise_4d_improve_xyz ¶

noise_4d_improve_xyz :: proc "odin" (seed: i64, coord: [4]f64) -> (value: f32) {…}
 

4D OpenSimplex2 noise, with XYZ oriented like noise_3d_fallback

and W for an extra degree of freedom. W repeats eventually.
Recommended for time-varied animations which texture a 3D object (W=time)
where there isn't a clear distinction between horizontal and vertical

noise_4d_improve_xyz_improve_xy ¶

noise_4d_improve_xyz_improve_xy :: proc "odin" (seed: i64, coord: [4]f64) -> (value: f32) {…}
 

4D OpenSimplex2 noise, with XYZ oriented like noise_3d_improve_xy

and W for an extra degree of freedom. W repeats eventually.
Recommended for time-varied animations which texture a 3D object (W=time)
in a space where Z is vertical.

noise_4d_improve_xyz_improve_xz ¶

noise_4d_improve_xyz_improve_xz :: proc "odin" (seed: i64, coord: [4]f64) -> (value: f32) {…}
 

4D OpenSimplex2 noise, with XYZ oriented like noise_3d_improve_xz

and W for an extra degree of freedom. W repeats eventually.
Recommended for time-varied animations which texture a 3D object (W=time)
in a space where Y is vertical.

Procedure Groups

This section is empty.

Source Files

Generation Information

Generated with odin version dev-2022-12 (vendor "odin") Windows_amd64 @ 2022-12-06 21:08:55.033016500 +0000 UTC