import * as THREE from 'three';

// wtf dude

class TaperedLink extends THREE.Group {

  constructor(baseMaterial, n1, n2, r1, r2) {
    super();
    //const geometry = new THREE.ConeGeometry( 1, 1, 32, true );
    const geometry = new THREE.CylinderGeometry( 1, 1, 1, 16, 1, 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_cone_busted(n1, n2, r1, r2) {
    const kraw = r1 - r2;
    let k = ( kraw == 0 ) ? 0.001 : kraw;
    let nbase = n1.v3;
    let napex = n2.v3;
    let rbase = r1;
    let rapex = r2;
    if( k < 0 ) {
      nbase = n2.v3;
      napex = n1.v3;
      rbase = r2;
      rapex = r1;
      k = -k;
    }

    const l = nbase.distanceTo(napex);
    const lapex = l * rapex / k;
    const h = l + lapex;
    this.object.scale.copy(new THREE.Vector3(rbase, h, rbase));
    const h_offset = 0.5 * h / l;
    const pos = new THREE.Vector3();
    pos.lerpVectors(nbase, napex, h_offset);
    
   
    //this.scale.copy(new THREE.Vector3(rbase, h, rbase));
    this.position.copy(pos); // the group, not the cone!! 

    this.lookAt(napex);
    this.rotation.y = Math.PI / 2.0;
 /*    const clipnorm = new THREE.Vector3();
   clipnorm.copy(napex);
    clipnorm.sub(nbase);
    clipnorm.negate();
    clipnorm.normalize();
    this.cone.material.clippingPlanes[0].setFromNormalAndCoplanarPoint(
      clipnorm, napex
    );

*/    
  }

  update(n1, n2, r1, r2) {
    const length = n1.v3.distanceTo(n2.v3);
    const centre = new THREE.Vector3();
    centre.lerpVectors(n1.v3, n2.v3, 0.5);
    const link_mean = (r1 + r2) * 0.5;		
    this.scale.copy(new THREE.Vector3(link_mean, link_mean, length));
    this.position.copy(centre);
    this.lookAt(n2.v3);
    this.children[0].rotation.x = Math.PI / 2.0;
    this.visible = true;
}	


export { TaperedLink };