ifc-style 0.3.0

Presentation: styles, colours, textures, layers, annotation.
Documentation 
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//! `IfcSurfaceStyleRefraction` projection.

use crate::error::StyleResult;
use crate::view::Record;

/// Borrowed projection of `IfcSurfaceStyleRefraction`.
#[derive(Debug, Clone, Copy)]
pub struct SurfaceStyleRefraction<'m, 's> {
    record: Record<'m, 's>,
}

impl<'m, 's> SurfaceStyleRefraction<'m, 's> {
    pub(crate) fn from_record(record: Record<'m, 's>) -> Self {
        Self { record }
    }

    /// The `RefractionIndex` attribute, when authored.
    pub fn refraction_index(&self) -> StyleResult<Option<f64>> {
        self.record.optional_number("RefractionIndex")
    }

    /// The `DispersionFactor` attribute, when authored.
    pub fn dispersion_factor(&self) -> StyleResult<Option<f64>> {
        self.record.optional_number("DispersionFactor")
    }
}