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2021-01-11 22:20:43 -08:00
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+// #ifndef UNITY_TERRAIN_TOOL_NOISE_INC
+// #define UNITY_TERRAIN_TOOL_NOISE_INC
+
+// /**************************************************************************
+
+//     Includes
+
+// **************************************************************************/
+
+// #include "NoiseCommon.hlsl"
+// #include "NoiseImpl.hlsl"
+
+// /**************************************************************************
+
+//     Fractal Functions
+
+// **************************************************************************/
+
+// float fbm( float p, FractalParams f )
+// {
+//     float n = 0;
+
+//     for( float i = 0; i < f.octaves; ++i )
+//     {
+//         n += f.amplitude * noise_impl( p * f.frequency );
+//         f.frequency *= f.lacunarity;
+//         f.amplitude *= f.persistence;
+//     }
+
+//     return n;
+// }
+
+// float fbm( float2 p, FractalParams f )
+// {
+//     float n = 0;
+
+//     for( float i = 0; i < f.octaves; ++i )
+//     {
+//         n += f.amplitude * noise_impl( p * f.frequency );
+//         f.frequency *= f.lacunarity;
+//         f.amplitude *= f.persistence;
+//     }
+
+//     return n;
+// }
+
+// float fbm( float3 p, FractalParams f )
+// {
+//     float n = 0;
+
+//     for( float i = 0; i < f.octaves; ++i )
+//     {
+//         n += f.amplitude * noise_impl( p * f.frequency );
+//         f.frequency *= f.lacunarity;
+//         f.amplitude *= f.persistence;
+//     }
+
+//     return n;
+// }
+
+// float fbm( float4 p, FractalParams f )
+// {
+//     float n = 0;
+
+//     for( float i = 0; i < f.octaves; ++i )
+//     {
+//         n += f.amplitude * noise_impl( p * f.frequency );
+//         f.frequency *= f.lacunarity;
+//         f.amplitude *= f.persistence;
+//     }
+
+//     return n;
+// }
+
+// float fbm( float p )
+// {
+//     return fbm( p, GetFractalParams() );
+// }
+
+// float fbm( float2 p )
+// {
+//     return fbm( p, GetFractalParams() );
+// }
+
+// float fbm( float3 p )
+// {
+//     return fbm( p, GetFractalParams() );
+// }
+
+// float fbm( float4 p )
+// {
+//     return fbm( p, GetFractalParams() );
+// }
+
+// /**************************************************************************
+
+//     Noise Functions
+//         - Call these from your shader
+
+// **************************************************************************/
+
+// /**************************************************************************
+//     Noise Functions - Fractal, Non-Warped
+// **************************************************************************/
+
+// float noise( float1 pos, FractalParams fractal )
+// {
+//     return fbm( pos, fractal );
+// }
+
+// float noise( float2 pos, FractalParams fractal )
+// {
+//     return fbm( pos, fractal );
+// }
+
+// float noise( float3 pos, FractalParams fractal )
+// {
+//     return fbm( pos, fractal );
+// }
+
+// float noise( float4 pos, FractalParams fractal )
+// {
+//     return fbm( pos, fractal );
+// }
+
+// /**************************************************************************
+//     Noise Functions - Fractal, Warped
+// **************************************************************************/
+
+// float noise( float pos, FractalParams fractal, WarpParams warp )
+// {
+//     // do warping
+//     for ( float i = 0; i < warp.iterations; ++i )
+//     {
+//         float q = fbm( pos + warp.offset.x );
+//         pos = pos + warp.strength * q;
+//     }
+
+//     float f = fbm( pos, fractal );
+
+//     return f;
+// }
+
+// float noise( float2 pos, FractalParams fractal, WarpParams warp )
+// {
+//     // do warping
+//     for ( float i = 0; i < warp.iterations; ++i )
+//     {
+//         float2 q = float2( fbm( pos ), fbm( pos + warp.offset.xy ) );
+//         pos = pos + warp.strength * q;
+//     }
+    
+//     float f = fbm( pos, fractal );
+
+//     return f;
+// }
+
+// float noise( float3 pos, FractalParams fractal, WarpParams warp )
+// {
+//     float q;
+//     // do warping
+//     for ( float i = 0; i < warp.iterations; ++i )
+//     {
+//         q = float3( fbm( pos.xyz ),
+//                            fbm( pos.xyz + warp.offset.xyz ),
+//                            fbm( pos.xyz + float3( warp.offset.x, warp.offset.y, 0 ) ) );
+//         pos = pos + warp.strength * q;
+//     }
+    
+//     float f = fbm( pos, fractal );
+
+//     return f;
+// }
+
+// float noise( float4 pos, FractalParams fractal, WarpParams warp )
+// {
+//     // do warping
+//     // for ( float i = 0; i < warp.iterations; ++i )
+//     // {
+//     //     float4 q = float4( fbm( pos ), fbm( pos + warp.offset.xyzw ) );
+//     //     pos = pos + warp.strength * q;
+//     // }
+
+//     float f = fbm( pos, fractal );
+
+//     return f;
+// }
+
+// /**************************************************************************
+//     Noise Functions - Non-Fractal, Non-Warped
+// **************************************************************************/
+
+// float noise( float pos )
+// {
+//     return noise_impl( pos );
+// }
+
+// float noise( float2 pos )
+// {
+//     return noise_impl( pos );
+// }
+
+// float noise( float3 pos )
+// {
+//     return noise_impl( pos );
+// }
+
+// float noise( float4 pos )
+// {
+//     return noise_impl( pos );
+// }
+
+// #endif // UNITY_TERRAIN_TOOL_NOISE_INC