Enum FlowFunc 

pub enum FlowFunc {
    Sin,
    Cos,
    Tan,
    Abs,
    Floor,
    Ceil,
    Fract,
    Sqrt,
    Pow,
    Atan2,
    Exp,
    Log,
    Sign,
    Mod,
    Min,
    Max,
    Clamp,
    Mix,
    Smoothstep,
    Step,
    Length,
    Distance,
    Dot,
    Cross,
    Normalize,
    Reflect,
    SdfBox,
    SdfCircle,
    SdfEllipse,
    SdfRoundRect,
    SdfUnion,
    SdfIntersect,
    SdfSubtract,
    SdfSmoothUnion,
    SdfSmoothIntersect,
    SdfSmoothSubtract,
    Sdf,
    Sobel,
    BufferRead,
    Phong,
    BlinnPhong,
    Perlin,
    Simplex,
    Worley,
    WorleyGrad,
    Fbm,
    FbmEx,
    Checkerboard,
    SpringEval,
    WaveStep,
    FluidStep,
    SampleScene,
    Mat4MulVec4,
    Mat4Mul,
    Mat4Inverse,
    Mat4Transpose,
    TransformNormal,
    TranslationMatrix,
    RotationMatrix,
    ScaleMatrix,
    PerspectiveMatrix,
    LookAtMatrix,
    SampleTexture,
}

Built-in function identifiers for the flow language

Variants

Sin

Cos

Tan

Abs

Floor

Ceil

Fract

Sqrt

Pow

Atan2

Exp

Log

Sign

Mod

Min

Max

Clamp

Mix

Smoothstep

Step

Length

Distance

Dot

Cross

Normalize

Reflect

SdfBox

SdfCircle

SdfEllipse

SdfRoundRect

SdfUnion

SdfIntersect

SdfSubtract

SdfSmoothUnion

SdfSmoothIntersect

SdfSmoothSubtract

Sdf

Current element’s SDF at sample point

Sobel

Sobel filter (compute normal from heightfield)

BufferRead

Read from a named buffer

Phong

BlinnPhong

Perlin

Simplex

Worley

WorleyGrad

Worley noise with analytic gradient — returns vec3(distance, grad_x, grad_y) in a single 3×3 grid pass. 5× faster than finite-difference gradient.

Fbm

Fractal Brownian Motion (layered noise)

FbmEx

Extended FBM with configurable persistence (roughness)

Checkerboard

Checkerboard pattern

SpringEval

WaveStep

FluidStep

SampleScene

Sample the background/scene texture at given UV coordinates. Returns vec4 (RGBA). Enables refraction effects in flow shaders.

Mat4MulVec4

Matrix × vector multiply: mat4 * vec4 → vec4

Mat4Mul

Matrix × matrix multiply: mat4 * mat4 → mat4

Mat4Inverse

Inverse of a mat4 → mat4

Mat4Transpose

Transpose of a mat4 → mat4

TransformNormal

Extract 3x3 normal matrix from model mat4, transform a vec3 normal

TranslationMatrix

Construct a translation matrix from vec3

RotationMatrix

Construct a rotation matrix from axis (vec3) and angle (float)

ScaleMatrix

Construct a scale matrix from vec3

PerspectiveMatrix

Construct a perspective projection: fov, aspect, near, far → mat4

LookAtMatrix

Construct a lookAt view matrix: eye, target, up → mat4

SampleTexture

Sample a texture at UV coordinates: texture_id, uv → vec4

Implementations

impl FlowFunc

pub fn parse(s: &str) -> Option<FlowFunc>

Parse a function name to a FlowFunc

pub fn arg_count(&self) -> (usize, usize)

Get the expected argument count for this function

pub fn return_type(&self, arg_types: &[FlowType]) -> Option<FlowType>

Get the return type given argument types

Trait Implementations

impl Clone for FlowFunc

fn clone(&self) -> FlowFunc

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for FlowFunc

impl Debug for FlowFunc

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Eq for FlowFunc

impl PartialEq for FlowFunc

fn eq(&self, other: &FlowFunc) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for FlowFunc