import * as THREE from 'three';



class TaperedLink extends THREE.Group {

  constructor(baseMaterial, n1, n2, r1, r2) {
    super();
    const geometry = new THREE.ConeGeometry( 0.75, 1, 32, true );
    const cplane = new THREE.Plane(new THREE.Vector3(0, -1, 0), 0.5);
    const material = baseMaterial.clone();
//    material.clippingPlanes = [ cplane ];
    this.object = new THREE.Mesh( geometry, material );
    this.add( this.object );
    this.update(n1, n2, r1, r2);
  }  

  update(n1, n2, r1, r2) {
    const kraw = r1 - r2;
    const k = ( kraw == 0 ) ? 0.001 : kraw;
    let nbase = n1;
    let napex = n2;
    let rbase = r1;
    let rapex = r2;
    if( k < 0 ) {
      nbase = n2;
      napex = n1;
      rbase = r2;
      rapex = r1;
    }
    const l = nbase.v3.distanceTo(napex.v3);

    const h = l * rbase / k;
    //const pos = new THREE.Vector3(0, h/2 - l/2, 0);
    //pos.add(nbase.v3);
    this.object.scale.copy(new THREE.Vector3(rbase, h, rbase));
    this.object.position.copy(nbase.v3);
    this.object.lookAt(napex.v3);
    this.object.rotation.x = Math.PI / 2.0;
  }
      // this.object.material.clippingPlanes[0].normal.y = -1;
      // this.object.material.clippingPlanes[0].constant = l / 2;
      //this.object.position.copy(new THREE.Vector3(0, h/2 - l/2, 0));
  //   } else {
  //     const h = l * r2 / k;
  //     this.object.scale.copy(new THREE.Vector3(r2, h, r2));
  //     // this.object.material.clippingPlanes[0].normal.y = 1;
  //     // this.object.material.clippingPlanes[0].constant = l / 2;
  //     //this.object.position.copy(new THREE.Vector3(0, h / 2 + l / 2, 0));
  //   }
  // }

}

export { TaperedLink };