set( a, b, c ) {

		this.a.copy( a );
		this.b.copy( b );
		this.c.copy( c );

		return this;

	}
Sets the triangle's vertices by copying the given values.

@param {Vector3} a - The first corner of the triangle.
@param {Vector3} b - The second corner of the triangle.
@param {Vector3} c - The third corner of the triangle.
@return {Triangle} A reference to this triangle.