LYGIA Shader Library

Use:

<float|vec2|vec3|vec4> invQuartic(<float|vec2|vec3|vec4> value);

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#ifndef FNC_INVQUARTIC
#define FNC_INVQUARTIC 
float invQuartic(const in float v) { return sqrt(1.0-sqrt(1.0-v)); }
vec2  invQuartic(const in vec2 v)  { return sqrt(1.0-sqrt(1.0-v)); }
vec3  invQuartic(const in vec3 v)  { return sqrt(1.0-sqrt(1.0-v)); }
vec4  invQuartic(const in vec4 v)  { return sqrt(1.0-sqrt(1.0-v)); }
#endif

Use:

<float|float2|float3|float4> invQuartic(<float|float2|float3|float4> value);

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#ifndef FNC_INVQUARTIC
#define FNC_INVQUARTIC 
float   invQuartic(const in float v)    { return sqrt(1.0-sqrt(1.0-v)); }
float2  invQuartic(const in float2 v)   { return sqrt(1.0-sqrt(1.0-v)); }
float3  invQuartic(const in float3 v)   { return sqrt(1.0-sqrt(1.0-v)); }
float4  invQuartic(const in float4 v)   { return sqrt(1.0-sqrt(1.0-v)); }
#endif

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fn invQuartic(v: f32) -> f32 { return sqrt(1.0-sqrt(1.0-v)); }
fn invQuartic2(v: vec2f) -> vec2f { return sqrt(1.0-sqrt(1.0-v)); }
fn invQuartic3(v: vec3f) -> vec3f { return sqrt(1.0-sqrt(1.0-v)); }
fn invQuartic4(v: vec4f) -> vec4f { return sqrt(1.0-sqrt(1.0-v)); }

Dependencies:

• lygia/math/operations.glsl
• lygia/math/sqrt.glsl

Use:

<float|float2|float3|float4> invQuartic(<float|float2|float3|float4> value);

Check it on Github

#ifndef FNC_INVQUARTIC
#define FNC_INVQUARTIC 
inline __host__ __device__ float   invQuartic(float v)    { return sqrt(1.0f - sqrt(1.0f - v)); }
inline __host__ __device__ float2  invQuartic(const float2& v)   { return sqrt(1.0f - sqrt(1.0f - v)); }
inline __host__ __device__ float3  invQuartic(const float3& v)   { return sqrt(1.0f - sqrt(1.0f - v)); }
inline __host__ __device__ float4  invQuartic(const float4& v)   { return sqrt(1.0f - sqrt(1.0f - v)); }
#endif