Struct ColonConfig 

pub struct ColonConfig {
    pub seed: Option<u64>,
    pub total_length: f32,
    pub base_radius: f32,
    pub segment_params: Option<[SegmentParams; 8]>,
    pub length_variation: f32,
    pub angle_variation: f32,
    pub wobble_amplitude: f32,
    pub wobble_frequency: f32,
}

Configuration parameters for generating a colon curve.

All parameters have sensible defaults based on adult human anatomy. Use seed to generate procedural variations while maintaining anatomical plausibility.

Example

use lumen_geometry::colon::ColonConfig;

// Default adult anatomy
let config = ColonConfig::default();

// Procedurally varied anatomy
let varied = ColonConfig {
    seed: Some(12345),
    ..Default::default()
};

// Custom configuration
let custom = ColonConfig {
    total_length: 120.0,  // Shorter colon
    base_radius: 2.5,     // Narrower lumen
    ..Default::default()
};

Fields

seed: Option<u64>

Seed for procedural variation. None uses default geometry.

When set, the seed affects:

• Segment length ratios (within anatomical bounds)
• Flexure angles (within anatomical bounds)
• Radius variations along the length
• Secondary curve wobble

total_length: f32

Total arc length of the colon in world units.

Adult human colon is approximately 150cm. Default is scaled for typical game/simulation use.

base_radius: f32

Base lumen radius in world units.

This is the default radius; actual radius varies by segment.

segment_params: Option<[SegmentParams; 8]>

Per-segment configuration overrides.

If None, uses default parameters for each segment.

length_variation: f32

How much the seed can vary segment lengths.

Value of 0.0 = no variation, 1.0 = maximum variation. Default is 0.3 (30% variation from base lengths).

angle_variation: f32

How much the seed can vary flexure angles.

Value of 0.0 = no variation, 1.0 = maximum variation. Default is 0.2 (20% variation from base angles).

wobble_amplitude: f32

Secondary wobble amplitude for organic feel.

Adds small-scale variation to the centerline path. Default is 0.1 (10% of radius).

wobble_frequency: f32

Frequency of secondary wobble.

Higher values = more frequent small bends. Default is 8.0 (approximately 8 wobbles per segment).

Implementations

impl ColonConfig

pub fn with_seed(seed: u64) -> Self

Create a new config with a specific seed.

pub fn params_for(&self, segment: ColonSegment) -> SegmentParams

Get parameters for a specific segment.

Returns custom params if set, otherwise default for that segment.

Trait Implementations

impl Clone for ColonConfig

fn clone(&self) -> ColonConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColonConfig

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

Formats the value using the given formatter.

impl Default for ColonConfig

fn default() -> Self

Returns the “default value” for a type.