Struct LdcMesh 

pub struct LdcMesh {
    pub vertices: Vec<Vertex>,
    pub indices: Vec<u32>,
    pub c_divisions: usize,
    pub g_divisions: usize,
}

A 3D mesh representing the LDC (Luminous Distribution Curve) solid.

This is the “photometric solid” - a 3D surface where distance from center equals intensity at that angle.

Fields

vertices: Vec<Vertex>

Vertex positions and normals

indices: Vec<u32>

Triangle indices (3 per triangle)

c_divisions: usize

Number of C-plane divisions

g_divisions: usize

Number of gamma divisions

Implementations

impl LdcMesh

pub fn from_photweb( web: &PhotometricWeb, c_step: f64, g_step: f64, scale: f32, ) -> Self

Generate an LDC solid mesh from a PhotometricWeb.

Arguments

• web - The photometric web to generate from
• c_step - Angle step for C-planes in degrees (e.g., 5.0 for smooth, 15.0 for fast)
• g_step - Angle step for gamma in degrees
• scale - Scale factor for the mesh (1.0 = normalized intensity as radius)

Coordinate System

• Y axis points up (nadir at -Y, zenith at +Y)
• X-Z plane is horizontal
• C=0° is along +Z axis, C=90° is along +X axis

pub fn positions_flat(&self) -> Vec<f32>

Get vertex positions as a flat array [x0, y0, z0, x1, y1, z1, …].

Useful for graphics APIs that expect interleaved or separate position data.

pub fn normals_flat(&self) -> Vec<f32>

Get vertex normals as a flat array [nx0, ny0, nz0, nx1, ny1, nz1, …].

pub fn triangle_count(&self) -> usize

Get the number of triangles in the mesh.

pub fn vertex_count(&self) -> usize

Get the number of vertices in the mesh.

pub fn generate_colors( &self, web: &PhotometricWeb, c_step: f64, g_step: f64, mode: ColorMode, ) -> Vec<Color>

Generate per-vertex colors based on mode.

Uses the photometric web to sample intensity at each vertex’s angle.

pub fn colors_flat(colors: &[Color]) -> Vec<f32>

Get colors as a flat RGBA array [r0, g0, b0, a0, r1, g1, b1, a1, …]

Trait Implementations

impl Clone for LdcMesh

fn clone(&self) -> LdcMesh

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LdcMesh

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

Formats the value using the given formatter.