three-csg-ts/lib/esm/Vertex.js

CSG library for use with THREE.js

import { Vector } from './Vector';
/**
 * Represents a vertex of a polygon. Use your own vertex class instead of this
 * one to provide additional features like texture coordinates and vertex
 * colors. Custom vertex classes need to provide a `pos` property and `clone()`,
 * `flip()`, and `interpolate()` methods that behave analogous to the ones
 * defined by `CSG.Vertex`. This class provides `normal` so convenience
 * functions like `CSG.sphere()` can return a smooth vertex normal, but `normal`
 * is not used anywhere else.
 */
export class Vertex {
    constructor(pos, normal, uv, color) {
        this.pos = new Vector().copy(pos);
        this.normal = new Vector().copy(normal);
        this.uv = new Vector().copy(uv);
        this.uv.z = 0;
        color && (this.color = new Vector().copy(color));
    }
    clone() {
        return new Vertex(this.pos, this.normal, this.uv, this.color);
    }
    // Invert all orientation-specific data (e.g. vertex normal). Called when the
    // orientation of a polygon is flipped.
    flip() {
        this.normal.negate();
    }
    // Create a new vertex between this vertex and `other` by linearly
    // interpolating all properties using a parameter of `t`. Subclasses should
    // override this to interpolate additional properties.
    interpolate(other, t) {
        return new Vertex(this.pos.clone().lerp(other.pos, t), this.normal.clone().lerp(other.normal, t), this.uv.clone().lerp(other.uv, t), this.color && other.color && this.color.clone().lerp(other.color, t));
    }
}